Patent Publication Number: US-2022220725-A1

Title: Folding Beam Systems

Description:
CROSS-REFERENCES TO RELATED APPLICATIONS 
     This application is a continuation application of PCT Patent Application No. PCT/US21/59440, filed Nov. 16, 2021, which claims the benefit of U.S. Provisional Application No. 63/136,268 filed Jan. 12, 2021 and U.S. Provisional Application No. 63/188,101 filed May 13, 2021; and this application claims the benefit of U.S. Provisional Application No. 63/136,268 filed Jan. 12, 2021 and U.S. Provisional Application No. 63/188,101 filed May 13, 2021. 
    
    
     BACKGROUND OF THE INVENTION 
     Field of the Invention 
     The inventions herein relate to structures, such as dwellings and other buildings for residential occupancy, commercial occupancy and/or material storage, and to components for such structures. 
     Description of the Related Art 
     In the field of residential housing, the traditional technique for building homes is referred to as “stick-built” construction, where a builder constructs housing at the intended location using in substantial part raw materials such as wooden boards, plywood panels, and steel columns. The materials are assembled piece by piece over a previously prepared portion of ground, for example, a poured concrete slab or a poured concrete or cinder block foundation. 
     There have been a variety of efforts to depart from the conventional construction techniques used to create dwellings, as well as commercial spaces and like. One of the alternatives to stick-built construction is very generally referred to as modular housing. As opposed to stick-built construction, where the structure is built on-site, a modular house is constructed in a factory and then shipped to the site, often by means of a tractor-trailer. 
     Such modular housing often exceeds in size normally-permitted legal limits for road transport. For example, in the United States the maximum permitted dimensions for road transport are in general 102 inches (259.1 cm) in width, 13.5 feet (4.11 m) in height and 65 to 75 feet (19.81 to 22.86 m) in length. Thus, in many cases transporting a modular house from factory to site requires oversize load permits, which may impose restrictions on when transport can be undertaken and what routes can be utilized. Oversize road regulations may also require the use of an escort car and a trailing car as well. All of these requirements and restrictions inevitably increase the cost of the modular housing. 
     Significant advancements in the construction of dwellings and commercial space are described in U.S. Pat. Nos. 8,474,194, 8,733,029, 10,688,906, 10,829,029 and 10,926,689. In one aspect, these patents pertain to fabricating wall, floor and roof components in a factory that are folded together into a compact shipping module, and which are then transported to the intended location and unfolded to yield a fully formed structure. 
     SUMMARY OF THE INVENTION 
     The present inventions constitute advancements in transferring vertical loads, such as personnel weight, furniture, equipment and the like, to the edges of horizontally oriented enclosure components, particularly floor components and roof components. These inventions include structural members that can be folded, to permit the creation of a compact shipping module, yet can be unfolded and locked in the unfolded position to provide a rigid structure for resisting the stress arising from vertical loads and transferring them to lower levels and ultimately the building foundation. These inventions also facilitate defining a basic structural section that can be utilized to construct foldable, transportable buildings of varying size, and simplify their manufacturing. 
     In one aspect, the present inventions are directed to a hinge assembly rotatable between an open first position and a closed second position comprising (a) a first hinge portion and a second hinge portion, where each such hinge portion comprises (i) a base plate with an obverse face, a reverse face, an upper edge, an opposed lower edge and a base plate vertical centerline; (ii) a hinge section with a hinge section vertical centerline, the hinge section extending from the obverse face and comprising a plurality of spaced-apart hinge leaves symmetrically positioned about the hinge section vertical centerline, with the hinge section vertical centerline being offset from the base plate vertical centerline, each of the plurality of hinge leaves defining a hinge leaf aperture, and with the hinge leaf apertures positioned in horizontal alignment with each other along a hinge aperture centerline; (iii) a locking pin barrel extending from the obverse face and positioned to a first side of the base plate vertical centerline, the locking pin barrel defining a bore; (iv) a plurality of locking pin leaves extending from the obverse face and positioned to the first side of the base plate vertical centerline, each locking pin leaf defining a locking pin aperture, the locking pin apertures positioned in vertical alignment with each other, and with the bore of the locking pin barrel; and (v) a plurality of free interlock leaves extending from the obverse face, each free interlock leaf defining an interlock aperture, with the interlock apertures in vertical alignment with each other, and the free interlock leaves positioned to a second side of the base plate vertical centerline at a position so that, when the hinge assembly is in the second position, the free interlock leaves of each of the first and second hinge portions interleave with the locking pin leaves of the other of the first and second hinge portions. The hinge leaves of the first hinge portion are interleaved with the hinge leaves of the second hinge portion, with a hinge pin positioned in the hinge leaf apertures of the interleaved hinge leaves of the first and second hinge portions to pivotally join the first hinge portion and the second hinge portion and permit the second hinge portion to rotate relative to the first hinge portion from the first position to the second position. There is also provided a first locking pin adapted to be inserted into the bore defined in the locking pin barrel of the first hinge portion and received in (i) the locking pin apertures of the first hinge portion and (ii) the interlock apertures of the second hinge portion, when the hinge assembly is in the second position. 
     In another aspect, the present inventions are directed to a foldable enclosure component having a folded position and an unfolded position comprising (a) a planar first component portion having a planar laminate construction and a first edge; and (b) a planar second component portion having a planar laminate construction and a second edge, with the first edge of the first component portion positioned proximate to the second edge of the second component portion. The planar laminate construction of each of the first and second component portions comprises: (i) a planar foam panel layer having a first face and an opposed second face, (ii) a planar first metal layer having a first face and an opposed second face bonded to the first face of the planar foam panel layer, (iii) a planar second metal layer having a first face bonded to the second face of the planar foam panel layer and an opposed second face; and (iv) a protective layer having an inorganic composition, a first face bonded to the second face of the second metal layer, and an opposed second face. A first hinge assembly joins the planar first component portion and the planar second component portion along their respective first and second edges and is adapted to permit the foldable enclosure component to rotate the second component portion relative to the first component portion from a folded position to an unfolded position, with the protective layers of the first and second component portions positioned adjacent to each other when the second component portion is in the unfolded position. 
     These and other aspects of the present inventions are described in the drawings annexed hereto, and in the description of the preferred embodiments and claims set forth below. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of finished structures prepared in accordance with the present inventions. 
         FIG. 2  is a top schematic view of a finished structure prepared in accordance with the present inventions. 
         FIG. 3  is an end view of a shipping module from which is formed the finished structure respectively shown in  FIG. 1 . 
         FIGS. 4 and 5  are partial cutaway views of a finished structure in accordance with the present inventions, depicting in greater detail aspects of the roof and floor components. 
         FIG. 6  is a schematic perspective view depicting the exterior edge reinforcement for a wall component in accordance with the present inventions. 
         FIG. 7  is an exploded cross-sectional view of a multi-layered, laminate construction for use in the enclosure components of the present inventions. 
         FIG. 8A  is a perspective view of a foldable I-beam for a floor component in accordance with the present inventions, in the beam unfolded position, and  FIG. 8B  is a side view of a foldable I-beam for a floor component in accordance with the present inventions, in the beam folded position. 
         FIG. 9  is a perspective view showing the obverse face of one embodiment of a hinge assembly portion in accordance with the present inventions. 
         FIG. 10  is a front view of the embodiment of the hinge assembly portion shown in  FIG. 9 . 
         FIG. 11  is a side view of the embodiment of the hinge assembly portion shown in  FIG. 9 . 
         FIG. 12  is a perspective view showing the reverse face of the embodiment of the hinge assembly portion shown in  FIG. 9 . 
         FIG. 13A  is a cutaway perspective view showing the embodiment of the hinge assembly portion shown in  FIG. 9  incorporated into the structure of a floor component in accordance with the present inventions,  FIG. 13B  is a cutaway perspective view showing the placement of floor end hinge assemblies in the structure of a floor component in accordance with the present inventions,  FIG. 13C  is a perspective view of a locking pin, and  FIGS. 13D and 13E  are sectioned side and perspective views of the locking pins as received in hinge assemblies that utilize the hinge assembly portions shown in  FIGS. 9-12 . 
         FIG. 14A  is a perspective view of a floor end hinge in accordance with the present inventions, and  FIG. 14B  is a front view of a floor end hinge in accordance with the present inventions. 
         FIG. 15A  is a perspective view of a foldable I-beam for a roof component in accordance with the present inventions, in the beam unfolded position, and  FIG. 15B  is a side view of a foldable I-beam for a roof component in accordance with the present inventions, in the beam folded position. 
         FIG. 16  is a perspective view showing the obverse face of another embodiment of a hinge assembly portion in accordance with the present inventions. 
         FIG. 17  is a front view of the embodiment of the hinge assembly portion shown in  FIG. 16 . 
         FIG. 18  is a side view of the embodiment of the hinge assembly portion shown in  FIG. 16 . 
         FIG. 19  is a perspective view showing the reverse face of the embodiment of the hinge assembly portion shown in  FIG. 16 . 
         FIG. 20  is a perspective view showing the obverse face of a further embodiment of a hinge assembly portion in accordance with the present inventions. 
         FIG. 21  is a front view of the embodiment of the hinge assembly portion shown in  FIG. 20 . 
         FIG. 22  is a side view of the embodiment of the hinge assembly portion shown in  FIG. 20 . 
         FIG. 23  is a perspective view showing the reverse face of the embodiment of the hinge assembly portion shown in  FIG. 20 . 
         FIG. 24A  is a cutaway perspective view showing the embodiment of the hinge assembly portion shown in  FIG. 16  incorporated into the structure of a roof component in accordance with the present inventions, and  FIG. 24B  is a cutaway perspective view showing the placement of roof end hinge assemblies in the structure of a roof component in accordance with the present inventions. 
         FIGS. 25A, 25B and 25C  respectively are perspective, front and side views of one embodiment of a roof end hinge in accordance with the present inventions, and  FIG. 25D  is a perspective view of another embodiment of a roof end hinge in accordance with the present inventions. 
         FIG. 26  is a perspective view of an enclosure component fabrication facility in accordance with the present inventions. 
         FIG. 27  is a perspective view of a rectangular roof component containing two foldable I-beam assemblies in accordance with the present inventions. 
         FIGS. 28A and 28B  respectively depict perspective and side views of an I-beam cover in accordance with the present inventions, and  FIG. 28C  depicts in side view the arrangement of I-beam cover arrangement positioned as placed over the flanges of an I-beam. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     An embodiment of the foldable, transportable structure  150  in which the inventions disclosed herein can be implemented is depicted in  FIGS. 1 through 5 . When fully unfolded, as exemplified by  FIG. 1 , structure  150  has a rectangular shape made of three types of generally planar and rectangular enclosure components  155 , the three types of enclosure components  155  consisting of a wall component  200 , a floor component  300 , and a roof component  400 . As shown in  FIGS. 1 and 2 , the perimeter of structure  150  is defined by first longitudinal edge  106 , first transverse edge  108 , second longitudinal edge  116  and second transverse edge  110 . For convenience, a direction parallel to first longitudinal edge  106  and second longitudinal edge  116  may be referred to as the “longitudinal” direction, a direction parallel to first transverse edge  108  and second transverse edge  110  may be referred to as the “transverse” direction, and a direction parallel to the vertical direction in  FIG. 1  may be referred to as the “vertical” direction. Structure  150  as shown has one floor component  300 , one roof component  400  and four wall components  200 ; although it should be understood that the present inventions are applicable to structures having other configurations as well. 
     Enclosure components  155  (wall component  200 , floor component  300  and roof component  400 ) can be fabricated and dimensioned as described herein and positioned together to form a shipping module  100 , shown end-on in  FIG. 3 . The enclosure components  155  are dimensioned so that the shipping module  100  is within U.S. federal highway dimensional restrictions. As a result, shipping module  100  can be transported over a limited access highway more easily, and with appropriate trailering equipment, transported without the need for oversize permits. Thus, the basic components of structure  150  can be manufactured in a factory, positioned together to form the shipping module  100 , and the modules  100  can be transported to the desired site for the structure, where they can be readily assembled, as described herein. 
     Enclosure Component ( 155 ): General Description 
     The enclosure components  155  of the present invention include a number of shared design features that are described below. 
     A. Laminate Structure Design 
     Enclosure components  155  can be fabricated using a multi-layered, laminate design. A particular laminate design that can be used to fabricate enclosure components  155  comprises a first structural layer  210 , a foam panel layer  213 , a second structural layer  215  and a protective layer  218 , as shown in  FIG. 7  and described further below. 
     In particular, first structural layer  210  is provided in the embodiment of enclosure component  155  that is depicted in  FIG. 7 . First structural layer  210  in the embodiment shown comprises a sheet metal layer  205 , which can be for example galvanized steel or aluminum. Sheet metal layer  205  is made from a plurality of generally planar rectangular metal sheets  206  positioned adjacent to each other to generally cover the full area of the intended enclosure component  155 . 
     Referring again to  FIG. 7 , there is next provided in the depicted embodiment of enclosure component  155  a foam panel layer  213 , comprising a plurality of generally planar rectangular foam panels  214  collectively presenting a first face  211  and a second opposing face  212 . Foam panels  214  are made for example of expanded polystyrene (EPS) foam. A number of these foam panels  214  are positioned adjacent to each other and superposed first face-down on first structural layer  210  to generally cover the full area of the intended enclosure component  155 . The foam panels  214  of foam panel layer  213  preferably are fastened to the metal sheets  206  of first structural layer  210  using a suitable adhesive, preferably a polyurethane based construction adhesive. Foam panel layer  213  can include exterior edge reinforcement and interior edge reinforcement, as described further below 
     In the embodiment of the enclosure component  155  depicted in  FIG. 7 , there is next provided a second structural layer  215 , having a first face that is positioned on the second opposing face  212  of foam panels  214  (the face distal from first structural layer  210 ), and also having a second opposing face. Second structural layer  215  in the embodiment shown comprises a sheet metal layer  216 , which can be for example galvanized steel or aluminum. Sheet metal layer  216  is made from a plurality of generally planar rectangular metal sheets  217  positioned adjacent to each other and superposed first face-down on the second opposing face of foam panel layer  213  to generally cover the full area of the intended enclosure component  155 . The metal sheets  217  of second structural layer  215  preferably are fastened to foam panel layer  213  using a suitable adhesive, preferably a polyurethane based construction adhesive. 
     In the embodiment of the enclosure component  155  depicted in  FIG. 7 , there is optionally next provided a protective layer  218 , having a first face that is positioned on the second opposing face of second structural layer  215  (the face distal from foam panel layer  213 ), and also having a second opposing face. Optional protective layer  218  in the embodiment shown comprises a plurality of rectangular structural building panels  219  principally comprising an inorganic composition of relatively high strength, such as magnesium oxide (MgO). The structural building panels  219  are positioned adjacent to each other and superposed first face-down on the second opposing face of second structural layer  215  to generally cover the full area of the intended enclosure component  155 . The building panels  219  of protective layer  218  preferably are fastened to second structural layer  215  using a suitable adhesive, preferably a polyurethane based construction adhesive. Protective layer  218  can be used if desired to impart a degree of fire resistance to the enclosure component  155 , as well as to provide a pleasing texture and/or feel. 
     Other embodiments of multi-layered, laminate designs, which can be used to fabricate the enclosure components  155  of the present invention, are described in U.S. Nonprovisional patent application Ser. No. 16/786,130, entitled “Foldable Building Structures with Utility Channels and Laminate Enclosures,” filed on Feb. 10, 2020 and now issued as U.S. Pat. No. 11,118,344. The contents of that U.S. Nonprovisional patent application Ser. No. 16/786,130, entitled “Foldable Building Structures with Utility Channels and Laminate Enclosures” and filed on Feb. 10, 2020 are incorporated by reference as if fully set forth herein, particularly including the multi-layered, laminate designs described for example at paragraphs 0034-57 and depicted in FIGS. 4A-4D thereof. 
     B. Enclosure Component Exterior Edge Reinforcement 
     The exterior edges of each enclosure component  155  (i.e., the edges that define the perimeter of enclosure component  155 ) can be provided with exterior edge reinforcement, as desired. Exterior edge reinforcement generally comprises an elongate rigid member which can protect the foam panel material of foam panel layer  213  that would otherwise be exposed at the exterior edges of enclosure components  155 . Exterior edge reinforcement can be fabricated from one or more of laminated strand lumber board, wooden board, C-channel extruded aluminum or steel, or the like, and is generally secured to the exterior edges of enclosure component  155  with fasteners, such as screw or nail fasteners, and/or adhesive. 
     C. Enclosure Component Partitioning 
     Enclosure components  155  in certain instances are partitioned into enclosure component portions to facilitate forming a compact shipping module  100 . In those instances where an enclosure component  155  is partitioned into enclosure component portions, any exterior edge reinforcement on the exterior edges defining the perimeter of the enclosure component is segmented as necessary between or among the portions. 
     The enclosure component portions can be joined by hinge structures or mechanisms to permit the enclosure component portions to be “folded” and thereby contribute to forming a compact shipping module  100 . 
     D. Enclosure Component Interior Edge Reinforcement 
     An enclosure component  155  partitioned into enclosure component portions will have interior edges. There will be two adjacent interior edges for each adjacent pair of enclosure component portions. Such interior edges can be provided with interior edge reinforcement. Similar to exterior edge reinforcement, such interior edge reinforcement generally comprises an elongate, rigid member which can protect the foam panel material of foam panel layer  213  which that would otherwise be exposed at the interior edges of enclosure components  155 . Interior edge reinforcement can be fabricated from one or more of laminated strand lumber board, wooden board, C-channel extruded aluminum or steel, or the like, and is generally secured to the interior edges of enclosure component  155  with fasteners, such as screw or nail fasteners, and/or adhesive. 
     E. Enclosure Component Load Transfer 
     In the case of enclosure components  155 , it is necessary to transfer the loads imposed on their surfaces to their exterior edges, where those loads can be transferred either to or through adjoining walls, or to the building foundation. For enclosure components  155  that are horizontally oriented when in use (floor component  300  and roof component  400 ), such loads include the weight of equipment, furniture and people borne by their surfaces, as well as vertical seismic loads. For enclosure components that are vertically oriented when in use (wall component  200 ), such loads include those arising from meteorological conditions (hurricanes, tornadoes, etc.) and human action (vehicle and other object impacts). 
     For this purpose, multi-layered, laminate designs as shown in  FIG. 7  will function to transfer the loads described above. To add additional load transfer capability, structural members, such as beams and/or joists, can be utilized within the perimeter of the enclosure components  155 , as is deemed appropriate to the specific design of structure  150  and the particular enclosure component  155 , to assist in the transfer of loads to the exterior edges. Particular beam assemblies for floor component  300  and roof component  400  are described below. 
     F. Enclosure Component Sealing Systems 
     Structure  150  comprises a number of wall, floor and roof components with abutting or exposed exterior edges, as well as a number of partitioned wall, floor and roof components with interior edges. In this regard, sealing structures can be utilized, with the objective to limit or prevent the ingress of rain water, noise and outside air across these exterior and interior edges into the interior of structure  150 . 
     Particular sealing structures for accomplishing the foregoing objective are described in PCT Patent Application No. PCT/US21/56415, entitled “Enclosure Component Sealing Systems,” filed on Oct. 25, 2021 and having the same inventors as the present application. The contents of that PCT Patent Application No. PCT/US21/56415, entitled “Enclosure Component Sealing Systems,” filed on Oct. 25, 2021 and having the same inventors as the present application, are incorporated by reference as if fully set forth herein, particularly including the sealing systems described for example at paragraphs 0080-0167 and depicted in FIGS. 9-20 thereof, and also including the exemplary placements for such sealing systems described in paragraphs 0168-0174 and depicted in  FIGS. 8A-8B  thereof. 
     Further design details of wall component  200 , floor component  300 , and roof component  400  are provided in the sections following. 
     Wall Component ( 200 ) 
     Typically, a structure  150  will utilize four wall components  200 , with each wall component  200  corresponding to an entire wall of structure  150 . 
     A. General Description 
     Wall component  200  has a generally rectangular perimeter. As shown in  FIG. 1 , wall components  200  have plural apertures, specifically a door aperture  202 , which has a door frame and door assembly, and plural window apertures  204 , each of which has a window frame and a window assembly. The height and length of wall components  200  can vary in accordance with design preference, subject as desired to the dimensional restrictions applicable to transport, described above. In this disclosure, structure  150  is fashioned with all sides of equal length; accordingly, its first and second longitudinal edges  106  and  116 , and its first and second transverse edges  108  and  110 , are all of equal length. It should be understood however, that the inventions described herein are applicable to structures having other dimensions, such as where two opposing wall components  200  are longer than the other two opposing wall components  200 . 
     As indicated above, wall components  200  of the present inventions can utilize a multi-layered, laminate design. In the embodiment depicted in  FIGS. 1 through 6 , wall component  200  utilizes the multi-layered, laminate design shown in  FIG. 7  employing these particular elements: sheet metal layer  205  of first structural layer  210  is 24 gauge galvanized steel approximately 0.022-0.028 inch thick, the foam panels  214  of foam panel layer  213  are EPS foam approximately 5.68 inches thick, the sheet metal layer  216  of second structural layer  215  is 24 gauge galvanized steel approximately 0.022-0.028 inch thick, and the building panels  219  of protective layer  218  are MgO board approximately 0.25 inch (6 mm) thick. 
     The perimeter of each wall component  200  is generally provided with exterior edge reinforcement. As exemplified by wall component  200  shown in  FIG. 6 , the exterior edge reinforcement for wall component  200  is a floor plate  220  along the bottom horizontal edge, a ceiling plate  240  along the top horizontal edge and two end pieces  270  respectively fastened at each vertical edge of wall component  200 . In the case of a wall component  200 , exterior edge reinforcement provides regions for fastening like regions of abutting wall components  200 , roof component  400  and floor component  300 , in addition to protecting the exterior edges of foam panel material. In the embodiment shown in  FIGS. 1 through 6 , the exterior edge reinforcement for wall component  200  provided by floor plate  220 , ceiling plate  240 , and end pieces  270  is fabricated from laminated strand lumber board 5.625″ deep and 1.5″ thick. 
     B. Partitioned Wall Components 
     Referring to  FIG. 2 , structure  150  has two opposing wall components  200 , where one of the two opposing wall components  200  comprises first wall portion  200   s - 1  and second wall portion  200   s - 2 , and the other of the two opposing wall components  200  comprises third wall portion  200   s - 3  and fourth wall portion  200   s - 4 . Each of wall portions  200   s - 1 ,  200   s - 2 ,  200   s - 3  and  200   s - 4  has a generally rectangular planar structure. As shown in  FIG. 2 , the interior vertical edge  192 - 1  of wall portion  200   s - 1  is proximate to a respective interior vertical edge  192 - 2  of wall portion  200   s - 2 , and the interior vertical edge  194 - 3  of wall portion  200   s - 3  is proximate a respective interior vertical wall edge  194 - 4  of wall portion  200   s - 4 . Interior edge reinforcement can be provided at any one or more of vertical edges  192 - 1 ,  192 - 2 ,  194 - 3  and  194 - 4 . In the embodiment shown in  FIGS. 1 through 6 , the interior edge reinforcement provided at vertical edges  192 - 1 ,  192 - 2 ,  194 - 3  and  194 - 4 , is fabricated from laminated strand lumber board 5.625″ deep and 1.5″ thick. 
     Referring again to  FIG. 2 , first wall portion  200   s - 1  is fixed in position on floor portion  300   a  proximate to first transverse edge  108 , and third wall portion  200   s - 3  is fixed in position on floor portion  300   a , opposite first wall portion  200   s - 1  and proximate to second transverse edge  110 . First wall portion  200   s - 1  is joined to second wall portion  200   s - 2  with a hinge structure that permits wall portion  200   s - 2  to pivot about vertical axis  192  between a folded position and an unfolded position, and third wall portion  200   s - 3  is joined to fourth wall portion  200   s - 4  with a hinge structure to permit fourth wall portion  200   s - 4  to pivot about vertical axis  194  between a folded position and an unfolded position. 
     Notably, first wall portion  200   s - 1  is longer than third wall portion  200   s - 3  by a distance approximately equal to the thickness of wall component  200 , and second wall portion  200   s - 2  is shorter than third wall portion  200   s - 3  by a distance approximately equal to the thickness of wall component  200 . Furthermore, wall portion  200   s - 1  and wall portion  200   s - 3  are each shorter in length (the dimension in the transverse direction) than the dimension of floor portion  300   a  in the transverse direction. Dimensioning the lengths of wall portions  200   s - 1 ,  200   s - 2 ,  200   s - 3  and  200   s - 4  in this manner permits wall portions  200   s - 2  and  200   s - 4  to nest against each other in an overlapping relationship when in an inwardly folded position. In this regard,  FIG. 2  depicts wall portions  200   s - 2  and  200   s - 4  both in their unfolded positions, where they are labelled  200   s - 2   u  and  200   s   4 - u  respectively, and  FIG. 2  also depicts wall portions  200   s - 2  and  200   s - 4  both in their inwardly folded positions, where they are labelled  200   s - 2   f  and  200   s   4 - f  respectively. When wall portions  200   s - 2  and  200   s - 4  are in their inwardly folded positions ( 200   s - 2   f  and  200   s - 4   f ), they facilitate forming a compact shipping module. When wall portion  200   s - 2  is in its unfolded position ( 200   s - 2   u ), it forms with wall portion  200   s - 1  a wall component  200  proximate first transverse edge  108 , and when wall portion  200   s - 4  is in its unfolded position ( 200   s - 4   u ), it forms with wall portion  200   s - 3  a wall component  200  proximate second transverse edge  110 . 
     The hinge structures referenced above, for securing first wall portion  200   s - 1  to second wall portion  200   s - 2 , and third wall portion  200   s - 3  to fourth wall portion  200   s - 4 , can be surface mounted or recessed, and of a temporary or permanent nature. The provision of interior edge reinforcement, as described above, can provide a region for securing such hinge structures. Suitable hinge structures can be fabricated for example of ferrous or non-ferrous metal, plastic or leather material. 
     C. Unpartitioned Wall Components 
     As compared to the two wall components  200  proximate first and second transverse edges  108  and  110 , which are partitioned into wall portions, the remaining two wall components  200  proximate first and second longitudinal edges  106  and  116  do not comprise plural wall portions, but rather each is a single piece structure. However, one of these wall components  200 , which is sometimes denominated  200 P in this disclosure, and which is located on floor portion  300   b  proximate first longitudinal edge  106 , is pivotally secured to floor portion  300   b  by means of hinge structures to permit wall component  200 P to pivot about horizontal axis  105  shown in  FIG. 3  from a folded position to an unfolded position. Pivotally securing wall component  200 P also facilitates forming a compact shipping module  100 . The remaining wall component  200 , sometimes denominated  200 R in this disclosure, is rigidly secured on floor portion  300   a  proximate second longitudinal edge  116  and abutting the vertical edges of first wall portion  200   s - 1  and third wall portion  200   s - 3  proximate to second longitudinal edge  116 , as shown in  FIG. 2 . 
     The hinge structures referenced above, for securing wall component  200 P to floor portion  300   b , can be surface mounted or recessed, and of a temporary or permanent nature. The provision of exterior edge reinforcement, as described above, can provide a region for securing such hinge structures. Suitable hinge structures can be fabricated for example of ferrous or non-ferrous metal, plastic or leather material. 
     Floor Component ( 300 ) 
     Typically, a structure  150  will utilize one floor component  300 ; thus floor component  300  generally is the full floor of structure  150 . 
     A. General Description 
     Floor component  300  has a generally rectangular perimeter.  FIGS. 4 and 5  depict floor component  300  in accordance with the present inventions. The perimeter of floor component  300  is defined by first longitudinal floor edge  117 , first transverse floor edge  120 , second longitudinal floor edge  119  and second transverse floor edge  118 . In particular, (a) first longitudinal floor edge  117 , (b) first transverse floor edge  120 , (c) second longitudinal floor edge  119  and (d) second transverse floor edge  118  generally coincide with (i.e., underlie) (w) first longitudinal edge  106 , (x) first transverse edge  108 , (y) second longitudinal edge  116  and (z) second transverse edge  110 , respectively, of structure  150 . 
     The length and width of floor component  300  can vary in accordance with design preference. In the particular embodiment of structure  150  depicted in  FIGS. 2, 4 and 5 , floor component  300  is approximately 19 feet (5.79 m) by 19 feet (5.79 m). 
     Floor component  300  and its constituent elements are generally designed and dimensioned in thickness and in other respects to accommodate the particular loads to which floor component  300  may be subject. It is preferred that floor component  300  utilize a multi-layered, laminate design, such as that described in connection with  FIG. 7 . In the embodiment shown in  FIGS. 4 and 5 , the bottom-most surface of floor component  300  comprises sheet metal layer  205  of first structural layer  210 , with sheet metal layer  205  being 24 gauge galvanized steel approximately 0.022-0.028 inch thick. Above sheet metal layer  205  there are provided foam panels  214  of foam panel layer  213 . In the embodiment shown in  FIGS. 4 and 5 , foam panels  214  are EPS foam approximately 7.125 inches thick. Above foam panel layer  213  there is provided sheet metal layer  216  of second structural layer  215 , with sheet metal layer  216  being 24 gauge galvanized steel approximately 0.022-0.028 inch thick. Above sheet metal layer  216  of second structural layer  215 , there are provided building panels  219  of protective layer  218 , with building panels  219  being MgO board approximately 0.25 inch (6 mm) thick. 
     The perimeter of each floor component  300  is generally provided with exterior edge reinforcement. As exterior edge reinforcement for the embodiments of floor component  300  shown in  FIGS. 4 and 5 , a first footing beam  320  (visible edge-on in  FIG. 4 ) is positioned at the first longitudinal floor edge  117  of floor component  300 , a second footing beam  320  (visible edge-on in  FIG. 5 ) is positioned at the second transverse floor edge  118  of floor component  300 , a third footing beam  320  (visible edge-on in  FIG. 5 ) is positioned at the first transverse floor edge  120  of floor component  300 , and a fourth footing beam  320  (visible edge-on in  FIG. 4 ) is positioned at the second longitudinal floor edge  119  of floor component  300 . In the case of floor component  300 , the exterior edge reinforcement provided by footing beams  320  assists in resisting vertical loads and transferring such loads to any roof component  400  thereunder and then to underlying wall components  200 , and/or to the foundation of the finished structure  150 , in addition to protecting the edges of foam panel material of the foam panel layer  213 . In the embodiment shown in  FIGS. 1 through 6 , the exterior edge reinforcement provided by footing beams  420  of floor component  300  is fabricated from laminated strand lumber board 7.125″ deep and 1.5″ thick. 
     B. Floor Partitioning 
     The floor component  300  is partitioned into floor portion  300   a  and floor portion  300   b .  FIG. 2  shows flow portions  300   a  and  300   b  in plan view, and  FIG. 4  shows floor portions  300   a  and  300   b  in section view, edge-on. 
     Each of the floor portions  300   a  and  300   b  is a planar generally rectangular structure, with floor portion  300   a  adjoining floor portion  300   b . Interior edge  301   a  of floor portion  300   a  abuts interior edge  301   b  of floor portion  300   b , as shown in  FIG. 4 . As interior edge reinforcement, a reinforcing board  307  is positioned in floor portion  300   a  adjacent interior edge  301   a , and a reinforcing board is positioned in floor portion  300   b  adjacent interior edge  301   b . In the embodiment shown in  FIGS. 1 through 6 , the interior edge reinforcement provided by reinforcing boards  307  is laminated strand lumber board 7.125″ deep and 1.5″ thick. 
     Referring to structure  150  shown in  FIGS. 2 and 4 , floor portion  300   a  is fixed in position relative to first wall portion  200   s - 1 , third wall portion  200   s - 3  and wall component  200   s -R. Floor portion  300   a  is joined with hinge structures to floor portion  300   b , so as to permit floor portion  300   b  to pivot through approximately ninety degrees (90°) of arc about a horizontal axis  305 , located proximate the top surface of floor component  300 , between a fully folded position, where floor portion  300   b  is vertically oriented as shown in  FIG. 3 , and a fully unfolded position, shown in  FIGS. 2 and 4 , where floor portion  300   b  is horizontally oriented and co-planar with floor portion  300   a . Particular embodiments of suitable hinge structures for joining floor portion  300   a  to floor portion  300   b  are described below. 
     C. Hinged Vertical Load Transfer Components 
       FIG. 8A  shows a beam assembly  325  that can be placed within floor component  300  to provide reinforcement in the direction along the beam and assist in transferring vertical loads borne by floor component  300  to its edges. Beam assembly  325  includes two I-beams  326   a  and  326   b . I-beam  326   a  is positioned approximately in the middle of floor portion  300   a , I-beam  326   b  is positioned approximately in the middle of floor portion  300   b , and each of I-beams  326   a  and  326   b  is oriented in the transverse direction. A hinge assembly  329 A joins I-beam  326   a  to I-beam  326   b . The hinge assembly  329 A permits beam assembly  325  to be folded to a beam folded position shown in  FIG. 8B  and unfolded to a beam unfolded position shown in  FIG. 8A . Further, the hinge assembly  329 A can be locked when beam assembly  325  is in the beam unfolded position, which transforms beam assembly  325  into a rigid structure that will reinforce floor component  300  in the direction perpendicular to its axis of folding. 
     Hinge Assembly  329 A. Hinge assembly  329 A comprises two identical hinge assembly portions  330 A partnered together to form a pivoted junction. The inter-positioning of the parts of two partnered hinge assembly portions  330 A is described below, and can also be seen in  FIGS. 13D and 13E , which depict the two partnered hinge assembly portions  330  of a hinge assembly  329 A that joins floor portion  300   a  and floor portion  300   b .  FIGS. 13D and 13E  are section views, sectioned in the transverse and longitudinal directions respectively. 
     Hinge assembly portion  330 A, shown in  FIG. 9 , in principal part includes a hinge base plate  331  having a generally planar, rectangular or, as shown in  FIGS. 9, 10 and 12 , a square configuration, with an obverse face  318  and a reverse face  319  (visible in  FIG. 12 ). A hinge section  332 , a pin interlock section  334 , a free interlock section  338  and a locking pin barrel  340  are secured to the obverse face  318  of hinge base plate  331 . Hinge assembly portion  330 A can be manufactured from steel that is cast as a single piece that includes sections  332 ,  334  and  338 , and barrel  340 . 
     Hinge section  332  shown in  FIG. 9  has four hinge leaves  333 , each of which extends away in a perpendicular direction from hinge base plate  331  and defines a hinge pin hole  327  in the region distal from hinge base plate  331 . The centerline of each hinge pin hole  327  is horizontally oriented and aligned with the centerline of the hinge pin holes  327  in the other three hinge leaves  333  of hinge section  332 . Hinge leaves  333  each has the same thickness and are spaced apart a distance equal to the thickness of a hinge leaf  333 , so as to permit interleaving the corresponding hinge leaves  333  of a partnering hinge assembly portion  330 A. 
     Pin interlock section  334  shown in  FIG. 9  has two pin interlock leaves  336 . Each pin interlock leaf  336  extends away in a perpendicular direction from hinge base plate  331  and defines a lock pin hole  347  in the region distal from base plate  331 . The centerline of each lock pin hole  347  is vertically oriented and in alignment with the centerline of the lock pin hole  347  of the adjacent pin interlock leaf  336 . The two pin interlock leaves  336  each has the same thickness as the other, and are spaced apart a distance equal to the thickness of a pin interlock leaf  336 . 
     Free interlock section  338  shown in  FIG. 9  has two free interlock leaves  339 . Each free interlock leaf  339  extends away in a perpendicular direction from hinge base plate  331  and defines a lock pin hole  347  in the region distal from base plate  331 . The centerline of each lock pin hole  347  is vertically oriented and in alignment with the lock pin hole  347  of the adjacent free interlock leaf  339 . The two free interlock leaves  336  each has the same thickness as the other, and both free interlock leaves  339  have the same thickness as pin interlock leaves  336 . The free interlock leaves  339  are spaced apart a distance equal to the thickness of a free interlock leaf  339  (which is equal to the thickness of a pin interlock leaf  336 ). 
     Locking pin barrel  340  shown in  FIG. 9  extends away in a perpendicular direction from hinge base plate  331  and defines a locking pin bore  341 . The centerline of bore  341  is vertically oriented and co-linear with the centerline of lock pin holes  347  of pin interlock leaves  336 . 
     As can be seen in  FIG. 10 , the vertical centerline  343  of hinge section  332  is not coincident with the vertical centerline  342  of hinge base plate  331 . Rather, it is offset, in the view shown in  FIG. 10 , leftward an offset distance  344 , which is one-half the thickness of a hinge leaf  333 . This permits utilizing two hinge assembly portions  330 A with identical designs in a partnering relationship to form the hinge assembly  329 A and the desired pivoting junction. Hinge assembly  329 A is assembled by interleaving the hinge leaves  333  of two hinge assembly portions  330 A and inserting a hinge pin  364  through their hinge pin holes  327 , which can be secured in place using for example an external retaining ring clip. Hinge assembly  329 A can pivot 90° from a first, hinge open position, where I-beam  325  is in the beam folded position shown in  FIG. 8B , to a second, hinge closed position, where I-beam  325  is in the beam unfolded position shown in  FIG. 8A . 
     As shown in  FIG. 10 , the free interlock leaves  339  of free interlock section  338  are offset in the vertical direction from the position of the pin interlock leaves  336  of the pin interlock section  334  by an offset distance  346 , which is equal to the thickness of a free interlock leaf  339  (which is equal to the thickness of a pin interlock leaf  336 ). In the hinge closed position (the beam unfolded position), the free interlock leaves  339  of the free interlock section  338  of a first of the two hinge assembly portions  330 A will interleave with the pin interlock leaves  336  of the pin interlock section  334  of the second of the two hinge assembly portions  330 A, as generally indicated in  FIG. 13E . Correspondingly in the hinge closed position (the beam unfolded position), the free interlock leaves  339  of the free interlock section  338  of the second of the two hinge assembly portions  330 A will interleave with the pin interlock leaves  336  of the pin interlock section  334  of the first of the two hinge assembly portions  330 A, again as generally indicated in  FIG. 13E . The centerline of lock pin holes  347  of the free interlock leaves  339  of each hinge assembly portion  330 A is positioned so that, when a hinge assembly  329 A is in the hinge closed position (the beam unfolded position), that lock pin hole centerline will be co-linear with the centerline of the lock pin holes  347  in the pin interlock section  334  of the other hinge assembly portion  330 A of the hinge assembly  329 A. 
     As can be appreciated, when hinge assembly  329 A is in the hinge closed position (the beam unfolded position), there is on each side of the vertical centerline of the assembly a locking pin barrel  340  positioned over a set of interleaved leaves  336 ,  339 . The hinge assembly  329 A is accordingly locked into the hinge closed position by inserting a locking pin  349  into the locking pin bore  341  provided in the locking pin barrel  340  of each of its two hinge assembly portions  330 A, as shown in  FIGS. 13D and 13E . 
     Locking pin  349 , which is shown in  FIG. 13C , has a length sufficient to be received in the lock pin holes  347  of the interleaved leaves of  336 ,  339  positioned below it and thus lock beam assembly  325  in the beam unfolded position. It is preferable for locking pin  349  to be cylindrical in cross-section. Also, locking pin  349  can be tapered along its length, so that the widest cross section is at the upper face of locking pin barrel  340 . In that case, the diameter of locking pin bore  341  can be tapered, and the diameters of lock pin holes  347  in leaves  336 ,  339  can be correspondingly reduced, the further they are located from locking pin barrel  340 . Alternatively, and as shown in  FIG. 13C , only the portion  349   a  of locking pin  349 , which is received in lock pin holes  347  of leaves  336 ,  339 , can be made tapered (with the diameters of lock pin holes  347  in leaves  336 ,  339  being correspondingly reduced, the further they are located from locking pin barrel  340 ), while locking pin bore  341 , and the portion  349   b  of locking pin  349  not received in lock pin holes  347  of leaves  336 ,  339 , each can be given a uniform diameter. In this latter case, the portion  349   c  of locking pin  349  (the upper section of portion  349   b ), which is received in locking pin bore  341 , as well as locking pin bore  341  itself, can be provided with complimentary screw threads, as shown in  FIGS. 13C-13E , to permit securing locking pin  349  in place. 
     To facilitate the rotation of hinge assembly  329 A so that beam assembly  325  can smoothly move into the beam unfolded position shown in  FIG. 8A , it is preferred that the upper and lower faces of leaves  336 ,  339  not be planar, but rather curved. Referring to  FIG. 11 , there is shown interlock leaves  336  in profile. As compared to planar surfaces  348 , which originate at hinge base plate  331  and extend out in a direction perpendicular to the plane of hinge base plate  331 , the upper and lower faces of free interlock leaves  339  can be seen to be curved, about a point proximate to hinge pin hole  327 . Similarly, the upper and lower faces of pin interlock leaves  336  are comparably curved. The curvature varies depending on the face location, with faces closer to pin hole  327  being more deeply curved than faces further away. 
     A stop  324  is optionally provided at the edge of the lower free interlock leaf  339  of each hinge portion  330 A of hinge assembly  329 A to assist in preventing hyper-extending beam assembly  325  when unfolded. In the case where hinge assembly  329 A is fabricated as a single casting, stops  324  of the partnered hinge portions  330 A of each hinge assembly  329 A can be more precisely machined or ground down as necessary following the casting step to insure that when hinge assembly  329 A is in the hinge closed position, I-beams  326   a  and  326 B do not extend beyond the desired beam unfolded position. In the beam unfolded position (when hinge assembly  329 A is in the hinge closed position), while I-beams  326   a  and  326   b  can be co-linear, it is preferred that I-beams  326   a  and  326   b  not be co-linear. In particular, in the beam unfolded position it is preferred that hinge assembly  329 A, when joined to I-beams  326   a  and  326   b , causes those I-beams to assume a small upwardly arched configuration. This can be realized for example by designing hinge assembly portion  330 A so that when hinge assembly portion  330 A is secured to an end of an I-beam  326   a  or  326   b , obverse face  318  is canted a select positive angle (i.e., angularly rotated clockwise about the centerline of hinge pin holes  327  shown in  FIG. 11 ), such as one-half degree (+0.5°), relative to the reverse face  319  of hinge assembly portion  330 A. This upward arching is intended to reduce or eliminate any sag in floor component  300  when in the fully unfolded position. 
     The reverse face  319  of hinge assembly portion  330 A is adapted to be secured to an end of one of I-beams  326   a  and  326   b . The hinge assembly portions  330 A that join I-beam  326   a  and I-beam  326   b  are secured to I-beams  326   a ,  326   b  with their hinge sections  332  oriented upwardly, so that I-beam  326   b  shown in  FIG. 8A  can fold up relative to I-beam  326   a , as shown in  FIG. 8B . In particular, as shown in  FIG. 12  reverse face  319  is provided with four positioning tabs  321 , extending away from reverse face  319  in a perpendicular direction. Each positioning tab  321  has two flat sections  317  oriented perpendicular to each other and joined by a rounded section  315 . The positioning tabs  321  form a guide frame, having an “I” shape in profile, for receiving an end of one of I-beams  326   a  and  326   b . It is preferred that the I-beams  326   a ,  326   b  be secured to the reverse faces  319  by welding their internal flanges to hinge assembly portions  330   a . For this purpose, each of the positioning tabs  321  is preferably provided with a serpentine cut-out  322 , to increase the length of the weld line with the goal of increasing the strength of the weld. 
       FIG. 13A , a cutaway view of a portion of floor component  300  in the floor component unfolded position, depicts the mounting of hinge assembly  329 A within the floor component  300 , specifically where floor portion  300   a  abuts floor portion  300   b . As seen in  FIG. 13A  (and also visible in  FIG. 13E ), a bolt plate  314  joins the reinforcing board  307  positioned in floor portion  300   b , adjacent interior edge  301   b , to the hinge assembly portion  330 A secured to I-beam  326   b . A similar bolt plate  314  is located on the portion of I-beam  326   b  not visible in  FIG. 13A , and similar bolt plates  314  are located on each side of the partnering hinge assembly portion  330 A secured to I-beam  326   a  (not visible). 
     In the embodiment of floor component  300  shown in the figures, I-beam assembly  325  is located at the mid-point between first transverse floor edge  120  and second transverse floor edge  118 , and no hinge assemblies  329 A are utilized elsewhere within floor component  300 , such as proximate to first transverse floor edge  120  and second transverse floor edge  118 . Therefore, to assist in smoothly rotating floor portion  300   b , there is provided adjacent first transverse floor edge  120  a first floor end hinge assembly  345 A joining floor portions  300   a  and  300   b , and there is provided adjacent second transverse floor edge  118  a second floor end hinge assembly  345 A joining floor portions  300   a  and  300   b . The locations of both first and second floor end hinge assemblies  345 A is indicated in  FIG. 13B . 
     Floor end hinge assembly  345 A. Floor end hinge assembly  345 A comprises two identical floor end hinge portions  350 A. Referring to  FIGS. 14A and 14B , floor end hinge portion  350  in principal part includes a hinge base plate  351  on which is secured a hinge section  352 . Hinge section  352  has five hinge leaves  353  in the depicted embodiment, each of which extends away in a perpendicular direction from hinge base plate  351  and defines a hinge pin hole  354  in the region distal from hinge base plate  353 . The centerline of each hinge pin hole  354  is horizontally oriented and aligned with the centerline of the hinge pin holes  354  in the other hinge leaves  353  of hinge section  352 . Hinge leaves  353  each has the same thickness and are spaced apart a distance equal to the thickness of a hinge leaf  353 , so as to permit interleaving the corresponding hinge leaves  353  of the partnering hinge assembly portion  350 A. 
     As can be seen in  FIG. 14B , the vertical centerline  358  of hinge section  352  is not coincident with the vertical centerline  359  of hinge base plate  351 . Rather, it is offset, in the view shown in  FIG. 14B , rightward an offset distance  357 , which is one-half the thickness of a hinge leaf  353 . This permits utilizing two hinge assembly portions  350 A with identical designs in a partnering relationship to form the hinge assembly  345 A and the desired pivoting junction. Floor end hinge assembly  345 A can pivot ninety degrees (90°) from a first, hinge open position, corresponding to where I-beam  325  is in the folded position shown in  FIG. 8B , to a second, hinge closed position, corresponding to where I-beam  325  is in the unfolded position shown in  FIG. 8A . Floor end hinge assembly  345 A is assembled by interleaving the hinge leaves  353  of two hinge assembly portions  350 A and inserting a hinge pin (not visible) through the hinge pin holes  354  of the interleaved hinge leaves  353 , which can be secured in place using for example an external retaining ring clip. 
     Floor end hinge portion  350  additionally includes two opposed block-out shields  355   a  and  355   b . Block out shield  355   a  is positioned adjacent a first vertical edge of base plate  351  and extends away from base plate  351  in a perpendicular direction. Block out shield  355   b  is positioned proximate to an opposing second vertical edge of base plate  351 , but is inset an inset distance  356  equal to at least the thickness of block out shield  355   a , and extends away from base plate  351  in a perpendicular direction. 
     Referring to the floor end hinge assembly  345 A shown in  FIG. 13B  adjacent first floor transverse edge  120 , one of its hinge assembly portions  350 A is joined to the reinforcing board  307  adjacent edge  301   b , and the other of its hinge assembly portions  350 A is joined to the reinforcing board  307  adjacent interior edge  301   a . As to the floor end hinge assembly  345 A shown in  FIG. 13B , which is adjacent second transverse floor edge  118 , likewise one of its hinge assembly portions  350 A is joined to the reinforcing board  307  adjacent edge  301   a , and the other of its hinge assembly portions  350 A is joined to the reinforcing board  307  adjacent second interior edge  301   b.    
     Optionally, an I-beam cover  505 , shown in  FIGS. 28A-28C  can be positioned over the interior flanges (the flanges proximate to the enclosed space of structure  150 ) of each of I-beams  326   a  and  326   b . I-beam cover  505  is an elongate member that defines a deep channel  506  in cross-section dimensioned to be placed over and snugly fit one side of an I-beam flange. As shown in  FIG. 28C , two I-beam covers  505  are positioned abutting each other in an opposed manner to cover both sides of an I-beam flange. I-beam flange cover  505  is fabricated from a material that, relative to steel, has a low thermal conductivity, such as polyvinyl chloride. 
     Roof Component ( 400 ) 
     Typically, a structure  150  will utilize one roof component  400 ; thus roof component  400  generally is the full roof of structure  150 . 
     A. General Description 
     Roof component  400  has a generally rectangular perimeter.  FIGS. 1, 4 and 5  depict roof component  400  in accordance with the present inventions. The perimeter of roof component  400  is defined by first longitudinal roof edge  406 , first transverse roof edge  408 , second longitudinal roof edge  416  and second transverse roof edge  410 . In particular, (a) first longitudinal roof edge  406 , (b) first transverse roof edge  408 , (c) second longitudinal roof edge  416  and (d) second transverse roof edge  410  of roof component  400  generally coincide with (i.e., overlie) (w) first longitudinal edge  106 , (x) first transverse edge  108 , (y) second longitudinal edge  116  and (z) second transverse edge  110 , respectively, of structure  150 . 
     The length and width of roof component  400  can vary in accordance with design preference. In the particular embodiment of structure  150  depicted in  FIGS. 1, 4 and 5 , the length and width of roof component  400  approximates the length and width of floor component  300 . 
     Roof component  400  and its constituent elements are generally designed and dimensioned in thickness and in other respects to accommodate the particular loads to which roof component  400  may be subject. It is preferred that roof component  400  utilize a multi-layered, laminate design, such as that described in connection with  FIG. 7 . In the embodiment shown in  FIGS. 4 and 5 , the top-most surface of roof component  400  comprises sheet metal layer  205  of first structural layer  210 , with sheet metal layer  205  being 24 gauge galvanized steel approximately 0.022-0.028 inch thick. Below sheet metal layer  205  there are provided foam panels  214  of foam panel layer  213 , with foam panels  214  in the embodiment shown in  FIGS. 4 and 5  being EPS foam for example approximately 7.125 inches thick. Below foam panel layer  213  there is provided sheet metal layer  216  of second structural layer  215 , with sheet metal layer  216  being 24 gauge galvanized steel approximately 0.022-0.028 inch thick. Below sheet metal layer  216  of second structural layer  215 , there are provided building panels  219  of protective layer  218 , with building panels  219  being MgO board approximately 0.25 inch (6 mm) thick. 
     The perimeter of roof component  400  is generally provided with exterior edge reinforcement. As exterior edge reinforcement for the embodiment of roof component  400  shown in  FIGS. 4 and 5 , a first shoulder beam  435  (visible edge-on in  FIG. 4 ) is positioned at the first longitudinal roof edge  406  of roof component  400 , a second shoulder beam  435  (visible edge-on in  FIG. 5 ) is positioned at the first transverse roof edge  408  of roof component  400 , a third shoulder beam  435  (visible edge-on in  FIG. 5 ) is positioned at the second transverse roof edge  410  of roof component  400 , and a fourth shoulder beam  435  (visible edge-on in  FIG. 4 ) is positioned at the second longitudinal roof edge  416  of roof component  400 . In addition to protecting the exterior edges of foam panel material, the exterior edge reinforcement provided by shoulder beams  435  assists in resisting vertical loads and transferring such loads to lower floors through underlying wall components  200  supporting roof component  400 , and then to the foundation of the finished structure  150 . Such exterior edge reinforcement can also provide a region for fastening like regions of abutting enclosure components  155  (underlying and any overlying). Shoulder beams  435  of roof component  400  can be fabricated from laminated strand lumber board 7.125″ deep and 1.5″ thick. 
     B. Roof Partitioning 
     The roof component  400  of structure  150  is partitioned into roof portions  400   a ,  400   b  and  400   c .  FIG. 1  shows roof portions  400   a ,  400   b  and  400   c  in perspective view, and  FIG. 4  shows roof portions  400   a ,  400   b  and  400   c  in section view, edge-on. 
     Each of the roof portions  400   a ,  400   b  and  400   c  is a planar generally rectangular structure, with roof portion  400   a  adjoining roof portion  400   b , and roof portion  400   b  adjoining roof portion  400   c . Interior edge  412   c  of roof component  400   c  abuts a first interior edge  412   b  of roof component  400   b , as shown in  FIG. 4 . For interior edge reinforcement, a reinforcing board  437  is positioned adjacent interior edge  412   c , and a reinforcing board  437  is positioned against first interior edge  412   b . Interior edge  412   a  of roof portion  400   a  abuts a second interior edge  412   b  of roof portion  400   b , as shown in  FIG. 4 . For interior edge reinforcement, a reinforcing board  437  is positioned adjacent interior edge  412   a , and a reinforcing board  437  is positioned against second interior edge  412   b . In the embodiment shown in  FIGS. 1 through 6 , the interior edge reinforcement provided by reinforcing boards  437  of roof component  400  is laminated strand lumber board 7.125″ deep and 1.5″ thick. 
     Referring to structure  150  shown in  FIG. 4 , roof portion  400   a  is fixed in position relative to first wall portion  200   s - 1 , third wall portion  200   s - 3  and wall component  200 R. Roof portion  400   a  is joined to roof portion  400   b  with hinge structures provided between interior edge  412   a  of roof portion  400   a  and second interior edge  412   b  of roof portion  400   b . Such hinge structures are adapted to permit roof portion  400   b  to pivot through up to one hundred and eighty degrees (180°) of arc about a horizontal axis  405   a , located proximate the top of roof component  400  and shown in  FIG. 4 , between the roof fully folded position shown in  FIG. 3 , where roof portion  400   b  lies flat against roof portion  400   a , and the fully unfolded position shown in  FIG. 4 . 
     In turn, roof portion  400   b  is joined to roof portion  400   c  with hinge structures provided between first interior edge  412   b  of roof portion  400   b  and interior edge  412   c  of roof portion  400   c . Such hinge structures are adapted to permit roof portion  400   c  to pivot through up to one hundred and eighty degrees (180°) of arc about a horizontal axis  405   b , located proximate the bottom of roof component  400  and shown in  FIG. 4 , between the folded position shown in  FIG. 3 , where roof portion  400   c  lies flat against roof portion  400   b  (when roof portion  400   b  is positioned to lie flat against roof portion  400   a ), and the fully unfolded position shown in  FIG. 4 . Particular embodiments of suitable hinge structures for joining roof portion  400   a  to roof portion  400   b , and for joining roof portion  400   b  to roof portion  400   c , are described below. 
     C. Hinged Vertical Load Transfer Components 
       FIGS. 15A and 15B  shows a beam assembly  425  that can be placed within roof component  400  to provide reinforcement in the direction along the beam and assist in transferring vertical loads borne by floor component  300  to its edges. Beam assembly  425  includes three I-beams  426   a ,  426   b  and  426   c . I-beam  426   a  is positioned approximately in the middle of roof portion  400   a , I-beam  426   b  is positioned approximately in the middle of floor portion  400   b , I-beam  426   c  is positioned approximately in the middle of floor portion  400   c , and each of I-beams  426   a ,  426   b  and  426   c  is oriented in the transverse direction. A hinge assembly  429 B joins I-beam  426   a  to I-beam  426   b . In addition, a hinge assembly  429 C joins I-beam  426   b  to I-beam  426   c . The hinge assemblies  429 B and  429 C permit beam assembly  425  to be folded to a beam folded position, shown in  FIG. 15B , and unfolded to a beam unfolded position, shown in  FIG. 15A . Further, the hinge assemblies  429 B and  429 C can be locked when beam assembly  425  is in the beam unfolded position, which transforms beam assembly  425  into a rigid structure that will reinforce roof component  400  in the direction perpendicular to its axes of folding. 
     Hinge assemblies  429 B and  429 C are described further below. 
     Hinge Assembly  429 B. Hinge assembly  429 B comprises two identical hinge assembly portions  430 B partnered together to form a pivoted junction. The inter-positioning of the parts of the two partnered hinge assembly portions  430 B forming hinge assembly  429 B is substantively the same as illustrated in  FIGS. 13D and 13E  in reference to the two hinge assembly portions  330 A forming hinge assembly  329 A. 
     Hinge assembly portion  430 B is shown in  FIG. 16 . The design of hinge assembly portion  430 B is similar to hinge assembly portion  330 A discussed above. Accordingly, referring to  FIG. 16 , hinge assembly portion  430 B includes a hinge base plate  431  having an obverse face  418  and a reverse face  419  (visible in  FIG. 19 ). A hinge section  432 , a pin interlock section  434 , a free interlock section  438  and a locking pin barrel  440  are secured to the obverse face  418  of hinge plate  431 . Hinge assembly portion  430 B can be manufactured from steel that is cast as a single piece that includes sections  432 ,  434  and  438 , and barrel  440 . 
     Hinge section  432  shown in  FIG. 16  has four hinge leaves  433 . Each hinge leaf  433  extends away in a perpendicular direction from hinge base plate  431  and defines a hinge pin hole  427  in the region distal from hinge base plate  431 . The centerline of each hinge pin hole  427  is horizontally oriented and aligned with the centerline of the hinge pin holes  427  in the other hinge leaves  433  of hinge section  432 . Hinge leaves  433  each has the same thickness and are spaced apart a distance equal to the thickness of a hinge leaf  433 , so as to permit interleaving the corresponding hinge leaves  433  of the partnering hinge assembly portion  430 B. 
     Pin interlock section  434  shown in  FIG. 16  has two pin interlock leaves  436 . Each pin interlock leaf  436  extends away in a perpendicular direction from hinge base plate  431  and defines a lock pin hole  447  in the region distal from base plate  431 . The centerline of each lock pin hole  447  is vertically oriented and in alignment with the centerline of the lock pin hole  447  of the adjacent pin interlock leaf  436 . The two pin interlock leaves  436  each has the same thickness as the other, and are spaced apart a distance equal to the thickness of a pin interlock leaf  436 . 
     Free interlock section  438  shown in  FIG. 16  has two free interlock leaves  439 . Each free interlock leaf  439  extends away in a perpendicular direction from hinge base plate  431  and defines a lock pin hole  447  in the region distal from base plate  431 . The centerline of each lock pin hole  447  is vertically oriented and co-linear with the centerline of with the lock pin hole  447  of the adjacent free interlock leaf  439 . The two free interlock leaves  436  each has the same thickness as the other, and both free interlock leaves  439  have the same thickness as pin interlock leaves  436 . The free interlock leaves  439  are spaced apart a distance equal to the thickness of a free interlock leaf  439  (which is equal to the thickness of a pin interlock leaf  436 ). 
     Locking pin barrel  440  shown in  FIG. 16  extends away in a perpendicular direction from base plate  431  defines a locking pin bore  441 . The centerline of bore  441  is vertically oriented and co-linear with the centerline of lock pin holes  447  of pin interlock leaves  436 . 
     As can be seen in  FIG. 17 , the vertical centerline  443  of hinge section  432  is not coincident with the vertical centerline  442  of hinge base plate  431 . Rather, it is offset, in the view shown in  FIG. 17 , leftward an offset distance  444 , which is one-half the thickness of a hinge leaf  433 . This permits utilizing two hinge assembly portions  430 B with identical designs in a partnering relationship to form the hinge assembly  429 B and the desired pivoting junction. Hinge assembly  429 B is assembled by interleaving the hinge leaves  433  of two hinge assembly portions  430 B and inserting a hinge pin  464  (shown in  FIG. 24A ) through their hinge pin holes  427 , which can be secured in place using for example an external retaining ring clip. Hinge leaves  433 , visible in profile in  FIG. 18 , extend above hinge base plate  431  so that hinge pin holes  427  are positioned a vertical distance  411 , the B hinge pin pivot distance, from the lower edge of hinge assembly portion  430 B. B hinge pin pivot distance  411  is sufficient to permit hinge assembly  429 B to pivot one hundred and eighty degrees (180°) from a first, hinge open position, where I-beam  425  is in the beam folded position shown in  FIG. 15B , to a second, hinge closed position, where I-beam  425  is in the beam unfolded position shown in  FIG. 15A . 
     As shown in  FIG. 17 , the free interlock leaves  439  of free interlock section  438  are offset in the vertical direction from the position of the pin interlock leaves  436  of the pin interlock section  434  by an offset distance  446 , which is equal to the thickness of a free interlock leaf  439  (which is equal to the thickness of a pin interlock leaf  436 ). In the hinge closed position (the beam unfolded position), the free interlock leaves  439  of the free interlock section  438  of a first of the two hinge assembly portions  430 B will interleave with the pin interlock leaves  436  of the pin interlock section  434  of the second of the two hinge assembly portions  430 B. Correspondingly in the hinge closed position (the beam unfolded position), the free interlock leaves  439  of the free interlock section  438  of the second of the two hinge assembly portions  430 B will interleave with the pin interlock leaves  436  of the pin interlock section  434  of the first of the two hinge assembly portions  430 B. The centerline of lock pin holes  447  of the free interlock leaves  439  of each hinge assembly portion  430 B is positioned so that, when a hinge assembly  429 B is in the hinge closed position (the beam unfolded position), that lock pin hole centerline will be co-linear with the centerline of the lock pin holes  447  in the pin interlock section  434  of the other hinge assembly portion  430 B of the hinge assembly  429 B. 
     As can be appreciated, when hinge assembly  429 B is in the hinge closed position (the beam unfolded position), there is on each side of the vertical centerline of the assembly a locking pin barrel  440  positioned over a set of interleaved leaves  436 ,  439 . The hinge assembly  429  is accordingly locked into the hinge closed position by inserting a locking pin  349  (the same as used to lock partnered hinge assembly portions  330 A in the hinge closed position, and as shown in  FIG. 13C ) into the locking pin bore  441  provided in the locking pin barrel  440  of each of its two hinge assembly portions  430 B. 
     Locking pin  349  has a length sufficient to be received in the lock pin holes  447  of the interleaved leaves of  436 ,  439  positioned below it and thus lock beam assembly  425  in the beam unfolded position. As described above, it is preferable for locking pin  349  to be cylindrical in cross-section. Also as described above, locking pin  349  can be tapered along its length, so that the widest cross section is at the upper face of locking pin barrel  440 . In that case, the diameter of locking pin bore  441  can be tapered, and the diameters of lock pin holes  447  in leaves  436 ,  439  can be correspondingly reduced, the further they are located from locking pin barrel  440 . Alternatively, and as shown in  FIG. 13C , only the portion  349   a  of locking pin  349 , which is received in lock pin holes  447  of leaves  436 ,  439 , can be made tapered (with the diameters of lock pin holes  447  in leaves  436 ,  439  being correspondingly reduced, the further they are located from locking pin barrel  440 ), while locking pin bore  441 , and the portion  349   b  of locking pin  349  not received in lock pin holes  447  of leaves  436 ,  439 , each can be given a uniform diameter. In this latter case, the portion  349   c  of locking pin  349  (the upper section of portion  349   b ), which is received in locking pin bore  441 , as well as locking pin bore  441  itself, can be provided with complimentary screw threads (in the manner depicted in  FIGS. 13C-13E ), to permit securing locking pin  349  in place. 
     To facilitate the rotation of hinge assembly  429 B so that beam assembly  425  can smoothly move into the fully unfolded position shown in  FIG. 15A , it is preferred that the upper and lower faces of leaves  436 ,  439  not be planar, but rather curved. Referring to  FIG. 18 , there is shown interlock leaves  436  in profile. As compared to planar surfaces  448 , which originate at hinge base plate  431  and extend out in an orientation normal to the plane of hinge base plate  431 , the upper and lower faces of free interlock leaves  439  can be seen to be curved, about a point proximate to hinge pin hole  427 . Similarly, the upper and lower faces of pin interlock leaf  436  immediately below it are comparably curved. The curvature varies depending on the face location, with faces closer to pin hole  427  being more deeply curved than faces further away. 
     A stop  424  is optionally provided at the edge of the lower free interlock leaf  439  of each hinge portion  430 B of hinge assembly  429 B to assist in preventing hyper-extending beam assembly  425  when unfolded. In the case where hinge assembly  429 B is fabricated as a single casting, stops  424  of the partnered hinge portions  430 B of each hinge assembly  429 B can be more precisely machined or ground down as necessary following the casting step to insure that when hinge assembly  429 B is in the hinge closed position, I-beams  426   a  and  426   b  do not extend beyond the desired beam unfolded position. In the beam unfolded position (when hinge assembly  429 B is in the hinge closed position), while I-beams  426   a  and  426   b  can be co-linear, it is preferred that I-beams  426   a  and  426   b  not be co-linear. In particular, in the beam unfolded position it is preferred that hinge assembly  429 B, when joined to I-beams  426   a  and  426   b , causes those I-beams to assume a small upwardly arched configuration. This configuration can be realized for example by designing hinge assembly portion  430 B so that when hinge assembly portion  430 B is secured to an end of an I-beam  426   a  or  426   b , obverse face  418  is canted a select positive angle (i.e., angularly rotated clockwise about hinge pin hole  427  in  FIG. 18 ), such as one-half degree (+0.5°), relative to the reverse face  419  of hinge assembly portion  430 B. This upward arching is intended to reduce or eliminate any sag in floor component  400  when in the fully unfolded position. 
     The reverse face  419  of hinge assembly portion  430 B is adapted to be secured to an end of one of I-beams  426   a  and  426   b . The hinge assembly portions  430 B that join I-beam  426   a  and I-beam  426   b  are secured to I-beams  426   a ,  426   b  with their hinge sections  432  oriented upwardly, so that I-beam  426   b  shown in  FIG. 15A  can fold up relative to I-beam  426   a  to the beam folded position shown in  FIG. 15B . In particular, as shown in  FIG. 19  reverse face  419  is provided with four positioning tabs  421  extending away from reverse face  419  in a perpendicular direction. Each positioning tab  421  has two flat sections  417  oriented perpendicular to each other and joined by a rounded section  415 . The positioning tabs  421  secured to reverse face  419  form a guide frame, having an “I” shape in profile, for receiving an end of one of I-beams  426   a  and  426   b . It is preferred that the I-beams  426   a ,  426   b  be secured to the reverse faces  419  by welding their flanges to hinge assembly portions  430   a . For this purpose, each of the positioning tabs  421  is preferably provided with a serpentine cut-out  422 , to increase the length of the weld line with the goal of increasing the strength of the weld. 
     Hinge Assembly  429 C. Hinge assembly  429 C comprises two identical hinge assembly portions  430 C partnered together to form a pivoted junction. The inter-positioning of the parts of the two partnered hinge assembly portions  430 C forming hinge assembly  429 C is substantively the same as illustrated in  FIGS. 13D and 13E  in reference to the two hinge assembly portions  330 A forming hinge assembly  329 A. 
     Hinge assembly portion  430 C is shown in  FIGS. 20-23 . The design of hinge assembly portion  430 C is the same as hinge assembly portion  430 B, discussed above, with three exceptions. 
     The first exception is that the lower pin interlock leaf  436  of the hinge assembly portion  430 C is extended toward free interlock section  438  to provide a platform tab  407 , which is shown in  FIGS. 20 and 21 . When hinge assembly  429 C is in its fully open position in a structure  150 , the two platform tabs  407  of the partnered hinge assembly portions  430 C forming hinge assembly  429 C provide a foot-supporting area for construction personnel, while protecting the hinge structure. 
     The second exception is shown in  FIG. 22 , in which hinge leaves  453  extend above hinge base plate  431  so that hinge pin holes  427  are positioned a vertical distance  409 , the C hinge pin pivot distance, from the lower edge of hinge assembly portion  430 C. The C hinge pin pivot distance  409  is sufficient to permit hinge assembly  429 C to pivot one hundred and eighty degrees (180°) from a first, open position, where I-beam  425  is in the beam folded position shown in  FIG. 15B , to a second, closed position, where I-beam  425  is in the beam unfolded position shown in  FIG. 15A , without crimping or interfering with such protective layer  218  (shown in  FIG. 22 ) as may be positioned on second structural layer  215 . 
     The third exception relates to the fact that hinge assemblies  429 B and  429 C are mounted in opposite orientations. Referring to hinge assembly  429 B, the reverse face  419  of each of its two hinge assembly portions  430 B is adapted to be secured to a respective end of the two I-beams  426   a  and  426   b  adjacent to each other, and referring to hinge assembly  429 C the reverse face  419  of each of the two hinge assembly portions  430 C is adapted to be secured to a respective end of the two I-beams  426   b  and  426   c  adjacent to each other. As was discussed above, the hinge assembly portions  430 B that join I-beam  426   a  and I-beam  426   b  are secured to those I-beams  426   a ,  426   b  with their hinge sections  332  oriented upwardly, so that I-beam  426   b  shown in  FIG. 15A  can fold up relative to I-beam  426   a . In contrast, hinge assembly portions  430 C that join I-beam  326   b  and I-beam  326   c  are secured to I-beams  426   b ,  426   c  with their hinge sections  332  oppositely oriented; i.e., oriented downwardly, so that I-beam  426   c  shown in  FIG. 15A  can fold down relative to I-beam  426   b . These orientations permit I-beam  425  to be folded in an accordion pattern, as shown in  FIG. 15B . With these orientations, the three roof components  400   a ,  400   b  and  400   c  can be accordion folded (stacked), as shown in  FIG. 3 , with roof component  400   b  stacked on top of roof component  400   a , and roof component  400   c  stacked on top of the roof component  400   b.    
     Similar to the beam unfolded position of I-beams  426   a  and  426   b , while I-beams  426   b  and  426   c  can be co-linear in their beam unfolded position (when hinge assembly  429 C is in the hinge closed position), it is preferred that I-beams  426   b  and  426   c  not be co-linear in that beam unfolded position. In particular, in the beam unfolded position it is preferred that hinge assembly  429 C, when joined to I-beams  426   b  and  426   c , causes those I-beams to assume a small upwardly arched configuration. This can be realized for example by designing hinge assembly portion  430 C so that when hinge assembly portion  430 C is secured to an end of an I-beam  426   b  or  426   c , obverse face  418  is canted in the opposite direction as preferably found in hinge assembly  430 B; in other words, it is preferred that obverse face  418  of hinge assembly portion  430 C be canted a select negative angle (i.e., angularly rotated counterclockwise about hinge pin hole  427  in  FIG. 22 ), such as minus one-half degree (−0.5°), relative to the reverse face  419  of hinge assembly portion  430 C. As stated previously, this upward arching is intended to reduce or eliminate any sag in floor component  400  when in the fully unfolded position. 
       FIG. 24A , a cutaway view of a section of roof component  400  in the roof component unfolded position, depicts the mounting of hinge assembly  429 B within the floor component  400 , specifically between floor portion  400   a  and floor portion  400   b . Bolt plate  414  joins the reinforcing board  437  positioned in roof portion  400   b  adjacent second interior edge  412   b  to the hinge assembly portion  430 B secured to I-beam  426   b . A similar bolt plate  414  is located on the portion of I-beam  426   b  not visible in  FIG. 24A , and similar bolt plates  414  are located on each side of the partnering hinge assembly portion  430 B secured to I-beam  426   a . Hinge assembly  429 C is mounted within floor component  400  at the junction of roof portions  400   b  and  400   c  in a similar manner. 
     In the embodiment of roof component  400  shown in the figures, I-beam assembly  425  is located at the mid-point between first transverse roof edge  408  and second transverse roof edge  410 , and no hinge assemblies  429 B or  429 C are utilized elsewhere within roof component  400 , such as proximate to first transverse roof edge  408  or second transverse roof edge  410 . Therefore, to assist in smoothly rotating roof portion  400   b  relative to roof portion  400   a , there is provided adjacent first transverse roof edge  408  a first roof end hinge assembly  445 B joining roof portions  400   a  and  400   b , and there is provided adjacent second transverse roof edge  410  a second roof end hinge assembly  445 B joining roof portions  400   a  and  400   b . Additionally, to assist in smoothly rotating roof portion  400   c  relative to roof portion  400   b , there is provided adjacent first transverse roof edge  408  a first roof end hinge assembly  445 C joining roof portions  400   b  and  400   c , and there is provided adjacent second transverse roof edge  410  a second roof end hinge assembly  445 C joining roof portions  400   b  and  400   c . The locations of first and second roof end hinge assemblies  445 B are indicated in  FIG. 24B , and the locations of first and second roof end hinge assemblies  445 C are indicated in  FIG. 24B . The designs of roof end hinge assemblies  445 B and  445 C are described below. 
     Roof End Hinge assembly  445 B. Roof end hinge assembly  445 B comprises two identical roof end hinge portions  450 B. Referring to  FIG. 25A , roof end hinge portion  450 B in principal part includes a hinge base plate  451  on which is secured a hinge section  452 . Hinge section  452  has five hinge leaves  453  in the depicted embodiment, each of which extends in a perpendicular direction away from hinge base plate  451  and defines a hinge pin hole  454  in the region distal from hinge base plate  453 . The centerline of each hinge pin hole  454  is horizontally oriented and aligned with the centerline of the hinge pin holes  454  in the other hinge leaves  453  of hinge section  452 . Hinge leaves  453  each has the same thickness and are spaced apart a distance equal to the thickness of a hinge leaf  453 , so as to permit interleaving the corresponding hinge leaves  453  of the partnering hinge assembly portion  450 B. 
     As depicted in  FIG. 25B , the vertical centerline  458  of hinge section  452  of roof end hinge portion  445 B is not coincident with the vertical centerline  459  of hinge base plate  451 . Rather, it is offset an offset distance  457 , which is one-half the thickness of a hinge leaf  453 . This permits utilizing two hinge assembly portions  450 B with identical designs in a partnering relationship to form the hinge assembly  445 B and the desired pivoting junction. Roof end hinge assembly  445 B is assembled by interleaving the hinge leaves  453  of two hinge assembly portions  450 B and inserting a hinge pin (not visible) through their hinge pin holes  454 , which can be secured in place using for example an external retaining ring clip. As shown in  FIG. 25C , hinge leaves  453  of roof end hinge portion  445 B extend above hinge base plate  451  so that hinge pin holes  454  are positioned a vertical distance  461 , the B roof end hinge pivot distance, from the lower edge of hinge assembly portion  450 B. B roof end hinge pivot distance  461  is sufficient to permit hinge assembly  445 B to pivot one hundred and eighty degrees (180°) from a first, hinge open position, corresponding to where I-beam  425  of roof portion  400   b  is in the beam folded position shown in  FIG. 15B , to a second, hinge closed position, corresponding to where I-beam  425  is in the beam unfolded position shown in  FIG. 15A . 
     Roof end hinge portion  450 B additionally includes two opposed block-out shields  455   a  and  455   b , which are shown in  FIG. 25A . Block out shield  455   a  is positioned adjacent a first vertical edge of base plate  451  and extends away from base plate  451  in a perpendicular direction. Like the positioning of block out shield  355   b  of floor end hinge portion  351 , block out shield  455   b  is positioned proximate to an opposing second vertical edge of base plate  451 , but inset an inset distance  456  equal to at least the thickness of block-out shield  455   a , and extending away from base plate  351  in a perpendicular direction. 
     The roof end hinge assemblies  445 B shown in  FIG. 24B  have their hinge sections  452  oriented up, so that roof portion  400   b  can be folded upward relative to roof portion  400   a . The roof end hinge assembly  445 B that is adjacent first roof transverse edge  408  in  FIG. 24B  is secured in place by joining one of its hinge assembly portions  450 B to the reinforcing board  437  adjacent edge  412   a , and by joining the other of its hinge assembly portions  450 B to the reinforcing board  437  adjacent second interior edge  412   b . As to the roof end hinge assembly  445 B shown in  FIG. 24B , which is adjacent second roof transverse edge  408 , likewise one of its hinge assembly portions  450 B is joined to the reinforcing board  437  adjacent edge  412   a , and the other of its hinge assembly portions  450 B is joined to the reinforcing board  437  adjacent second interior edge  412   b.    
     Roof End Hinge assembly  445 C. Roof end hinge assembly  445 C comprises two identical roof end hinge portions  450 C, one of which is shown in  FIG. 25D . The principal elements and geometry of roof end hinge portion  450 C are the same as roof end hinge portion  450 B, except that hinge leaves  453  of roof end hinge portion  445 C extend above hinge base plate  451  so that hinge pin holes  454  are positioned a vertical distance  462 , the C roof end hinge pivot distance, from the lower edge of hinge assembly portion  450 C. C roof end hinge pivot distance  462  is sufficient to permit hinge assembly  445 C to pivot one hundred and eighty degrees (180°) from a first, hinge open position, corresponding to where I-beam  425  of roof portion  400   b  is in the beam folded position shown in  FIG. 15B , to a second, hinge closed position, corresponding to where I-beam  425  is in the beam unfolded position shown in  FIG. 15A , without crimping or interfering with such protective layer  218  as may be positioned on second structural layer  215 . Each roof end hinge assembly  445 C is completed by inserting a hinge pin (not visible) in the hinge pin holes  454  of the interleaved hinge leaves  453  of the partnered hinge assembly portions  450 C, which can be secured in place using for example an external retaining ring clip. 
     The roof end hinge assemblies  445 C shown in  FIG. 24B  have their hinge sections  452  oriented down, so that roof portion  400   c  can be folded downward relative to roof portion  400   b . The roof end hinge assembly  445 C that is adjacent first roof transverse edge  408  in  FIG. 24B  is secured in place by joining one of its hinge assembly portions  450 C to the reinforcing board  437  that is adjacent first interior edge  412   b , and by joining the other of its hinge assembly portions  450 C to the reinforcing board  437  adjacent interior edge  412   c . As to the roof end hinge assembly  445 C shown in  FIG. 24B , which is adjacent second roof transverse edge  408 , likewise one of its hinge assembly portions  450 C is joined to the reinforcing board  437  that is adjacent first interior edge  412   b , and by joining the other of its hinge assembly portions  450 C to the reinforcing board  437  adjacent interior edge  412   c.    
     Optionally, an I-beam cover  505 , as shown in  FIGS. 28A-28C  and described above, can be positioned over the interior flanges (the flanges proximate to the enclosed space of structure  150 ) of each of I-beams  426   a ,  426   b  and  326   c.    
     Enclosure Component Manufacture 
     For enclosure components  155  having the construction disclosed herein in reference to  FIG. 7 , the metal sheets  206  and  217  that can be used to form first structural layer  210  and second structural layer  215  respectively can be entirely flat and juxtaposed in a simple abutting relationship. Optionally, metal sheets  206  and  217  can be provided with edge structures that facilitate placement of sheets and panels during manufacture. 
     Particular edge structure designs for metal sheets  206  and  217  are described in U.S. Nonprovisional patent application Ser. No. 17/504,883 entitled “Sheet/Panel Design for Enclosure Component Manufacture,” having the same inventors as the inventions described herein and filed on Oct. 19, 2021. The contents of U.S. Nonprovisional patent application Ser. No. 17/504,883 entitled “Sheet/Panel Design for Enclosure Component Manufacture,” having the same inventors as the inventions described herein and filed on Oct. 19, 2021, are incorporated by reference as if fully set forth herein, particularly including the exterior and interior edge structure designs described for example at paragraphs 00187-00205 and 00212 and in FIGS. 8, 9A-9C, 23A-23J and 24A-24B thereof. 
       FIG. 26  depicts a facility  10  for fabricating the enclosure components  155 . The facility comprises a conveyor table  50 , a press table  51 , and in the embodiment shown in  FIG. 5 , four material turntables  52 A,  52 B,  52 C and  52 D and four robotic assemblers  54 A,  54 B,  54 C and  54 D. There is also an adhesive spray gantry  55  straddling the conveyor table  50 . Whether partitioned or not, all of the enclosure components  155 —wall components  200 , floor components  300  and roof components  400 —can be formed on the same facility  10 . 
     Conveyor table  50  is provided with a plurality of cylindrical rollers to facilitate movement of work pieces from the assembly area  56  into the press table  51 . The enclosure components  155  are built up, layer upon layer, in the assembly area  56 , and then moved into the press table  51 . Press table  51  preferably employs a vacuum bag system to press together the layers forming enclosure components  155 . Spray gantry  55  is movable over conveyor table  50  between a first position proximate to press table  51  and a second position distal from press table  51 . Spray gantry  55  is provided with a number of downward-directed spray heads for spraying adhesive, such as polyurethane based construction adhesive, onto the work pieces, as directed. 
     The facility  10  depicted in  FIG. 26  can fabricate up to two complete enclosure components  155  simultaneously, although it is equally capable of forming subassemblies thereof, such as laminated panel sections used to form complete enclosures components  155 . Thus robotic assemblers  54 A and  54 B are positioned as opposed pairs with conveyor table  50  between them, as shown in  FIG. 26 , and are used to move sheets and panels from turntables  52 A and  52 B, respectively, to appropriate locations on conveyor table  50  to form a first enclosure component  155 , or a first laminated panel section for an enclosure component  155 . Likewise, robotic assemblers  54 C and  54 D are positioned as opposed pairs with conveyor table  50  between them, as shown in  FIG. 26 , and are used to move sheets and panels from turntables  52 C and  52 D, respectively, to appropriate locations on conveyor table  50  to form a second enclosure component  155 , or a second laminated panel section for an enclosure component  155 . 
     Additional information concerning the facility  10  shown in  FIG. 26 , as well as exemplary manufacturing steps, are also described in U.S. Nonprovisional patent application Ser. No. 17/504,883 entitled “Sheet/Panel Design for Enclosure Component Manufacture,” having the same inventors as the inventions described herein and filed on Oct. 19, 2021. The contents of U.S. Nonprovisional patent application Ser. No. 17/504,883 entitled “Sheet/Panel Design for Enclosure Component Manufacture,” having the same inventors as the inventors described herein and filed on Oct. 19, 2021, are incorporated by reference as if fully set forth herein, particularly including the facility suitable for manufacturing the enclosure components  155  of the present invention, as well as exemplary manufacturing steps, described for example at paragraphs 00178-00186 and 00206-00222, and in FIGS. 22, 23A-23J and 24A-24B. 
     Enclosure Component Relationships and Assembly for Transport 
     It is preferred that there be a specific dimensional relationship among enclosure components  155 . In reference to the embodiment shown in the figures, it is preferred that the height “H” of wall components  200  be the same as the span “S f ” between the I-beam assembly  325  of floor component  300  and either its first transverse floor edge  120  or its second transverse floor edge  118 , with I-beam assembly  325  being located at the middle of floor component  300 . Correspondingly, it is preferred that the height of wall components  200  be the same as the span “S r ” between the I-beam assembly  425  of roof component  400  and either its first transverse roof edge  408  or its second transverse roof edge  410 , with I-beam assembly  425  being located at the middle of roof component  400 . Thus it is preferred that H=S f =S r . Accordingly, S f  and S r  are referred to herein simply as “S”, the panel section span. 
     Making H=S improves the production throughput of manufacturing facility  10 . Specifically, manufacturing facility  10  can be tasked with making multiple laminate panel sections sharing a common dimension based upon the bed width  49  of conveyor table  50  shown in  FIG. 26 , which can then be used to assemble either floor components  300  or roof components  400 . In an embodiment of manufacturing facility  10  shown in  FIG. 26 , the bed width  49  can accommodate work pieces having a dimension up to approximately 9.5 feet. Correspondingly, in the embodiment shown in the figures, the panel section span S between I-beam assembly  325  and either of the first and second transverse floor edges  120 ,  118  is 9.5 feet, and the panel section span S between I-beam assembly  425  either of the first and second transverse roof edges  408 ,  410  is 9.5 feet. Further, by selecting foam panels  214  of different thickness, wall components  200  can also be manufactured utilizing panel sections of span S. Accordingly, each wall component  200  in the embodiment of structure  150  shown in  FIG. 1  has a height H of 9.5 feet. 
     These same height/span relationships can also be utilized to make structures  150  where two of its opposing wall components  200  are longer than the other two opposing wall components  200 . For example,  FIG. 27  depicts a roof component  400  approximately 1.5 times longer in the longitudinal direction than in the transverse direction. In this example, roof portions  400   a ,  400   b  and  400   c  are each assembled from a series of three laminate panel sections, each such section having a panel section span of 9.5 feet in the longitudinal direction. The laminate panel sections of each of the three roof portions  400   a ,  400   b  and  400   c  are joined by two beam assemblies  425 , rather than one as in the embodiment shown in  FIG. 1 , to yield a roof component  400  approximately 29 feet long by 19 feet wide. The wall floor component  300  and wall components  200  are assembled from similarly-dimensioned laminate panel sections to yield the desired rectangular structure  150 . The foregoing design relationship can be extended to a structure  150  of any length in the longitudinal direction simply by adding, in the case of roof component  400  as an example, one or more additional beam assemblies  425  and further series of laminate panel sections. 
       FIG. 2  shows a top schematic view of finished structure  150  shown in  FIG. 1 , and includes a geometrical orthogonal grid for clarity of explaining the preferred dimensional relationships among its enclosure components  155 . The basic length used for dimensioning is indicated as “E” in  FIG. 2 ; the orthogonal grid overlaid in  FIG. 2  is 8E long and 8E wide; notably, the entire structure  150 , including perimeter boards  310 , preferably is bounded by this 8E by 8E orthogonal grid. 
     Roof portions  400   a ,  400   b  and  400   c  each can be identically dimensioned in the transverse direction. Alternatively, referring to  FIG. 3 , roof portion  400   c  (which is stacked upon roof portions  400   a  and  400   b  when roof portions  400   b ,  400   c  are fully folded) can be dimensioned to be larger than either of roof portion  400   a  and roof portion  400   b  in the transverse direction for example, by ten to fifteen percent, or by at least the aggregate thickness of roof components  400   a  and  400   b . This transverse direction dimensional increase is to reduce the chances of binding during the unfolding of roof portions  400   b ,  400   c . In addition, as described in U.S. Nonprovisional patent application Ser. No. 16/786,315, entitled “Equipment and Methods for Erecting a Transportable Foldable Building Structure,” and filed on Feb. 10, 2020, friction-reducing components can be used to facilitate unfolding roof component  400 , such as by positioning a first wheel caster at the leading edge of roof portion  400   c  proximate to the corner of roof portion  400   c  that is supported by wall portion  200   s - 2  as roof portion  400   c  is deployed, and positioning a second similar wheel caster at the leading edge of roof portion  400   c  proximate to the corner of roof portion  400   c  that is supported by wall portion  200   s - 4  as roof portion  400   c  is deployed. In such a case, roof portion  400   c  can be dimensioned larger than either of roof portions  400   a  and  400   b  in the transverse direction by at least the aggregate thickness of roof components  400   a  and  400   b , less the length of the first or second wheel caster. 
     In  FIG. 2 , the four wall components  200  are each approximately 8E long, and each of roof portions  400   a  and  400   b  is approximately 8E long and 2.5E wide. Roof portion  400   c  is approximately 8E long and 2.9E wide. In  FIGS. 2 and 3 , each of floor components  300   a  and  300   b  is 8H long; whereas floor component  300   a  is just over 3E wide and floor component  300   b  is just under 5E wide. 
     The shipping module  100  shown edge-on in  FIG. 3  includes a fixed space portion  102  defined by roof component  400   a , floor component  300   a , wall component  200 R, wall portion  200   s - 1  and wall portion  200   s - 3 . As shown in  FIG. 2 , second wall portion  200   s - 2  is folded inward and positioned generally against fixed space portion  102 , and fourth wall portion  200   s - 4  is folded inward and positioned generally against second wall portion  200   s - 2  (wall portions  200   s - 2  and  200   s - 4  are respectively identified in  FIG. 2  as portions  200   s - 2   f  and  200   s - 4   f  when so folded and positioned). The three roof components  400   a ,  400   b  and  400   c  are shown unfolded in  FIG. 1  and shown accordion folded (stacked) in  FIG. 3 , with roof component  400   b  stacked on top of roof component  400   a , and roof component  400   c  stacked on top of the roof component  400   b . Wall component  200 P, shown in  FIGS. 2 and 3 , is pivotally secured to floor portion  300   b  at the location of axis  105 , and is vertically positioned against the outside of wall portions  200   s - 2  and  200   s - 4 . In turn, floor portion  300   b  is vertically positioned proximate fixed space portion  102 , with wall component  200 P pending from floor portion  300   b  between floor portion  300   b  and wall portions  200   s - 2  and  200   s - 4 . 
     Sizing the enclosure components  155  of structure  150  according to the dimensional relationships disclosed above yields a compact shipping module  100 , as can be seen from the figures. Thus shipping module  100  depicted in  FIG. 3 , when dimensioned according to the relationships disclosed herein using an “E” dimension (see  FIG. 2 ) of approximately 28.625 inches (72.7 cm), and when its components are stacked and positioned as shown in  FIG. 3 , has an overall length of approximately 19 feet (5.79 m), an overall width of approximately 8.5 feet (2.59 meters) and an overall height of approximately 12.7 feet (3.87 meters). These overall dimensions are less than a typical shipping container. 
     It is preferred that the fixed space portion  102  be in a relatively finished state prior to positioning (folding) together all of the other wall, roof and floor portions as described above. In the embodiment shown in  FIGS. 1 and 2 , wall components  200  are fitted during manufacture and prior to shipment with all necessary door and window assemblies, with the enclosure components  155  being pre-wired, and fixed space portion  102  is fitted during manufacture with all mechanical and other functionality that structure  150  will require, such as kitchens, bathrooms, closets and other interior partitions, storage areas, corridors, etc. Carrying out the foregoing steps prior to shipment permits the builder, in effect, to erect a largely finished structure simply by “unfolding” (deploying) the positioned components of shipping module  100 . 
     Each of the wall, floor and roof components  200 ,  300  and  400 , and/or the portions thereof, can be sheathed in protective film  177  during fabrication and prior to forming the shipping module  100 . Alternatively or in addition, the entire shipping module  100  can be sheathed in a protective film. Such protective films can remain in place until after the shipping module  100  is at the construction site, and then removed as required to facilitate enclosure component deployment and finishing. 
     Shipping Module Transport 
     The shipping module is shipped to the building site by appropriate transport means. One such transport means is disclosed in U.S. Pat. No. 11,007,921, issued May 18, 2021; the contents of which are incorporated by reference as if fully set forth herein, particularly as found at column  3 , line  26  to column  6 , line  25  and in  FIGS. 1A-2D  thereof. As an alternative transport means, shipping module  100  can be shipped to the building site by means of a conventional truck trailer or a low bed trailer (also referred to as a lowboy trailer), and in the case of over-the-water shipments, by ship. 
     Structure Deployment and Finishing 
     At the building site, shipping module  100  is positioned over its desired location, such as over a prepared foundation; for example, a poured concrete slab, a poured concrete or cinder block foundation, sleeper beams or concrete posts or columns. This can be accomplished by using a crane, either to lift shipping module  100  from its transport and move it to the desired location, or by positioning the transport means over the desired location, lifting shipping module  100 , then moving the transport means from the desired location, and then lowering shipping module  100  to a rest state at the desired location. Particularly suitable equipment and techniques for facilitating the positioning of a shipping module  100  at the desired location are disclosed in U.S. Nonprovisional patent application Ser. No. 16/786,315, entitled “Equipment and Methods for Erecting a Transportable Foldable Building Structure,” and filed on Feb. 10, 2020. The contents of that U.S. Nonprovisional patent application Ser. No. 16/786,315, entitled “Equipment and Methods for Erecting a Transportable Foldable Building Structure,” and filed on Feb. 10, 2020, are incorporated by reference as if fully set forth herein, particularly including the equipment and techniques described for example at paragraphs 00126-00128 and in connection with  FIGS. 11A and 11B  thereof. 
     Following positioning of shipping module  100  at the building site, the appropriate portions of wall, floor and roof components  200 ,  300  and  400  are “unfolded” (i.e., deployed) to yield structure  150 . Unfolding occurs in the following sequence: (1) floor portion  300   b  is pivotally rotated about horizontal axis  305  (shown in  FIGS. 3 and 4 ) to an unfolded position, (2) wall component  200 P is pivotally rotated about horizontal axis  105  (shown in  FIG. 3  behind perimeter board  312 ) to an unfolded position, (3) wall portions  200   s - 2  and  200   s - 4  are pivotally rotated about vertical axes  192  and  194  (shown in  FIG. 2 ) respectively to unfolded positions, and (4) roof portions  400   b  and  400   c  are pivotally rotated about horizontal axes  405   a  and  405   b  (shown in  FIGS. 3 and 4 ) respectively to unfolded positions. When accordion folded as a stack, it can be appreciated that the protective layer  218  of roof portion  400   a  is distal from the protective layer of roof portion  400   b , whereas the protective layer  218  of roof portion  400   b  is in contact with, or proximate to, the protective layer of roof portion  400   c . Thus in unfolding roof portions  400   b  and  400   c , it is regarded herein that the protective layer  218  of the second component portion rotates toward the protective layer  218  of the first component portion  400   a , whereas the protective layer  218  of the third component portion  400   c  rotates away from the protective layer  218  of the second component portion  400   b.    
     A mobile crane can be used to assist in the deployment of certain of the enclosure components  155 , specifically roof portions  400   b  and  400   c , floor portion  300   b , as well as the wall component  200 P pivotally secured to floor portion  300   b . Alternatively, particularly suitable equipment and techniques for facilitating the deployment of enclosure components  155  are disclosed in U.S. Nonprovisional patent application Ser. No. 16/786,315, entitled “Equipment and Methods for Erecting a Transportable Foldable Building Structure,” and filed on Feb. 10, 2020. The contents of that U.S. Nonprovisional patent application Ser. No. 16/786,315, entitled “Equipment and Methods for Erecting a Transportable Foldable Building Structure,” and filed on Feb. 10, 2020, are incorporated by reference as if fully set forth herein, particularly including the equipment and techniques described for example at paragraphs 00132-00145 and depicted in  FIGS. 12A-14B  thereof. 
     After unfolding, the enclosure components  155  are secured together to finish the structure  150  that is shown in  FIG. 1 . If any temporary hinge structures have been utilized, then these temporary hinge structures can be removed if desired and the enclosure components  155  can be secured together. During or after unfolding and securing of the enclosure components  155 , any remaining finishing operations are performed, such as addition of roofing material, and making hook-ups to electrical, fresh water and sewer lines to complete structure  150 , as relevant here. 
     This disclosure should be understood to include (as illustrative and not limiting) the subject matter set forth in the following numbered clauses: 
     Clause 1. A hinge assembly rotatable between an open first position and a closed second position comprising: 
     (a) a first hinge portion and a second hinge portion, each such hinge portion comprising: 
     (i) a base plate with an obverse face, a reverse face, an upper edge, an opposed lower edge and a base plate vertical centerline; 
     (ii) a hinge section with a hinge section vertical centerline, the hinge section extending from the obverse face and comprising a plurality of spaced-apart hinge leaves symmetrically positioned about the hinge section vertical centerline, with the hinge section vertical centerline being offset from the base plate vertical centerline, each of the plurality of hinge leaves defining a hinge leaf aperture, and with the hinge leaf apertures positioned in horizontal alignment with each other along a hinge aperture centerline; 
     (iii) a locking pin barrel extending from the obverse face and positioned to a first side of the base plate vertical centerline, the locking pin barrel defining a bore; 
     (iv) a plurality of locking pin leaves extending from the obverse face and positioned to the first side of the base plate vertical centerline, each locking pin leaf defining a locking pin aperture, the locking pin apertures positioned in vertical alignment with each other, and with the bore of the locking pin barrel; and 
     (v) a plurality of free interlock leaves extending from the obverse face, each free interlock leaf defining an interlock aperture, with the interlock apertures in vertical alignment with each other, the free interlock leaves positioned to a second side of the base plate vertical centerline at a position so that, when the hinge assembly is in the second position, the free interlock leaves of each of the first and second hinge portions interleave with the locking pin leaves of the other of the first and second hinge portions; 
     (b) the hinge leaves of the first hinge portion interleaved with the hinge leaves of the second hinge portion, with a hinge pin positioned in the hinge leaf apertures of the interleaved hinge leaves of the first and second hinge portions to pivotally join the first hinge portion and the second hinge portion and permit the second hinge portion to rotate relative to the first hinge portion from the first position to the second position; and 
     (c) a first locking pin adapted to be inserted into the bore defined in the locking pin barrel of the first hinge portion and received in (i) the locking pin apertures of the first hinge portion and (ii) the interlock apertures of the second hinge portion, when the hinge assembly is in the second position. 
     Clause 2. The hinge assembly of clause 1, further comprising a second locking pin adapted to be inserted into the bore defined in the locking pin barrel of the second hinge portion and received in (i) the locking pin apertures of the second hinge portion and (ii) the interlock apertures of the first hinge portion, when the hinge assembly is in the second position. 
     Clause 3. The hinge assembly of either clause 1 or 2, wherein the hinge section vertical centerline of each of the first and second hinge portions is positioned so that the base plate vertical centerline of the first and second hinge portions are in an overlying relationship when the hinge assembly is in the second position. 
     Clause 4. The hinge assembly of any one of clause 1, 2 or 3, wherein each of the plurality of spaced-apart hinge leaves of each of the first and second hinge portions has a thickness the same as the other of the plurality of spaced-apart hinge leaves, and the hinge leaves are spaced-apart a distance equal to the thickness. 
     Clause 5. The hinge assembly of clause 4, wherein the hinge section vertical centerline of each of the first and second hinge portions is positioned so that the base plate vertical centerline of the first and second hinge portions is offset from the hinge section vertical centerline an offset distance equal to one-half the thickness of any of the plurality of spaced-apart hinge leaves. 
     Clause 6. The hinge assembly of any one of clause 1, 2, 3, 4 or 5 wherein at least a portion of the first locking pin is tapered. 
     Clause 7. The hinge assembly of any one of clause 1, 2, 3, 4, 5 or 6, wherein the first locking pin is cylindrical in cross-section. 
     Clause 8. The hinge assembly of any one of clause 1, 2, 3, 4, 5, 6 or 7, wherein a portion of the first locking pin, adapted to be received in (i) the locking pin apertures of the first hinge portion and (ii) the interlock apertures of the second hinge portion, when the hinge assembly is in the second position, is tapered. 
     Clause 9. The hinge assembly of any one of clauses 1-8, wherein the locking pin apertures of each of the first and second hinge portions are smaller with increasing distance from the hinge aperture centerline. 
     Clause 10. The hinge assembly of any one of clauses 1-9, wherein the interlock apertures of each of the first and second hinge portions are smaller with increasing distance from the hinge aperture centerline. 
     Clause 11. The hinge assembly of any one of clauses 1-10, wherein each locking pin leaf of each of the first and second hinge portions has an upper face and a lower face which are curved about the hinge aperture centerline. 
     Clause 12. The hinge assembly of any one of clauses 1-11, wherein each free interlock leaf of each of the first and second hinge portions has an upper face and a lower face which are curved about the hinge aperture centerline. 
     Clause 13. The hinge assembly of any one of clauses 1-12, wherein of each of the first and second hinge portions further comprises a stop projection extending from a free interlock leaf at a point distal from its base. 
     Clause 14. The hinge assembly of any one of clauses 1-13, wherein the reverse face of the first hinge portion is adapted to be secured to an end of a first beam by one or more positioning tabs extending away from the reverse face of the first hinge portion, which one or more positioning tabs are positioned to conform to the profile of the end of the first beam, and wherein the reverse face of the second hinge portion is adapted to be secured to an end of a second beam by one or more positioning tabs extending away from the reverse face of the second hinge portion, which one or more positioning tabs are positioned to conform to the profile of the end of the second beam. 
     Clause 15. The hinge assembly of clause 14, wherein the one or more positioning tabs of the first hinge portion comprise plural positioning tabs forming a guide frame having an “I” shape in profile, and the one or more positioning tabs of the second hinge portion comprise plural positioning tabs forming a guide frame having an “I” shape in profile. 
     Clause 16. The hinge assembly of clause 15, wherein at least one of the plural positioning tabs of the first hinge assembly is provided with a serpentine cut-out, and at least one of the plural positioning tabs of the second hinge assembly is provided with a serpentine cut-out. 
     Clause 17. The hinge assembly of any one of clauses 1-16, wherein the hinge leaves extend from the obverse face so that the hinge aperture centerline is positioned above the upper edge. 
     Clause 18. The hinge assembly of any one of clauses 1-16, wherein the hinge leaves extend from the obverse face proximate the upper edge and a sufficient distance from the lower edge so that the hinge assembly can rotate through one hundred eighty degrees from the first position to the second position. 
     Clause 19. A folding beam assembly rotatable from a folded position to an unfolded position comprising: 
     (a) a first beam having a first end; 
     (b) a second beam having a second end and an opposed third end; 
     (c) a first hinge portion secured to the first end and a second hinge portion secured to the second end, each such hinge portion comprising: 
     (i) a base plate with an obverse face, a reverse face, an upper edge, an opposed lower edge and a base plate vertical centerline; 
     (ii) a hinge section with a hinge section vertical centerline, the hinge section extending from the obverse face and comprising a plurality of spaced-apart hinge leaves symmetrically positioned about the hinge section vertical centerline, with the hinge section vertical centerline being offset from the base plate vertical centerline, each of the plurality of hinge leaves defining a hinge leaf aperture, and with the hinge leaf apertures positioned in horizontal alignment with each other along a hinge aperture centerline; 
     (iii) a locking pin barrel extending from the obverse face and positioned to a first side of the base plate vertical centerline, the locking pin barrel defining a bore; 
     (iv) a plurality of locking pin leaves extending from the obverse face and positioned to the first side of the base plate vertical centerline, each locking pin leaf defining a locking pin aperture, the locking pin apertures positioned in vertical alignment with each other, and with the bore of the locking pin barrel; and 
     (v) a plurality of free interlock leaves extending from the obverse face, each free interlock leaf defining an interlock aperture, with the interlock apertures in vertical alignment with each other, the free interlock leaves positioned to a second side of the base plate vertical centerline at a position so that, when the second beam is in an unfolded position relative to the first beam, the free interlock leaves of each of the first and second hinge portions interleave with the locking pin leaves of the other of the first and second hinge portions; 
     (d) the hinge leaves of the first hinge portion interleaved with the hinge leaves of the second hinge portion, with a hinge pin positioned in the hinge leaf apertures of the interleaved hinge leaves of the first and second hinge portions to pivotally join the first hinge portion and the second hinge portion and permit the second beam to rotate relative to the first beam from the folded position to the unfolded position; and 
     (e) a first locking pin adapted to be inserted into the bore defined in the locking pin barrel of the first hinge portion and received in (i) the locking pin apertures of the first hinge portion and (ii) the interlock apertures of the second hinge portion, when the second beam is in the unfolded position relative to the first beam. 
     Clause 20. The folding beam assembly of clause 19, further comprising a second locking pin adapted to be inserted into the bore defined in the locking pin barrel of the second hinge portion and received in (i) the locking pin apertures of the second hinge portion and (ii) the interlock apertures of the first hinge portion, when the second beam is in the unfolded position relative to the first beam. 
     Clause 21. The folding beam assembly of either clause 19 or 20, wherein the hinge section vertical centerline of each of the first and second hinge portions is positioned so that the base plate vertical centerline of the first and second hinge portions are in an overlying relationship when the hinge assembly is in the unfolded position. 
     Clause 22. The folding beam assembly of any one of clause 19, 20 or 21, wherein each of the plurality of spaced-apart hinge leaves of each of the first and second hinge portions has a thickness the same as the other of the plurality of spaced-apart hinge leaves, and the hinge leaves are spaced-apart a distance equal to the thickness. 
     Clause 23. The folding beam assembly of clause 22, wherein the hinge section vertical centerline of each of the first and second hinge portions is positioned so that the base plate vertical centerline of the first and second hinge portions is offset from the hinge section vertical centerline an offset distance equal to one-half the thickness of any of the plurality of spaced-apart hinge leaves. 
     Clause 24. The folding beam assembly of any one of clause 19, 20, 21, 22 or 23, wherein each locking pin leaf of each of the first and second hinge portions has an upper face and a lower face which are curved about the hinge aperture centerline. 
     Clause 25. The folding beam assembly of any one of clause 19, 20, 21, 22, 23 or 24, wherein each free interlock leaf of each of the first and second hinge portions has an upper face and a lower face which are curved about the hinge aperture centerline. 
     Clause 26. The folding beam assembly of any one of clauses 19-25, wherein the first end of the first beam is received in one or more positioning tabs extending away from the reverse face of the first hinge portion, which one or more positioning tabs are positioned to conform to a profile of the first end of the first beam, and wherein the second end of the second beam is received in one or more positioning tabs extending away from the reverse face of the second hinge portion, which one or more positioning tabs are positioned to conform to a profile of the second end of the second beam. 
     Clause 27. The folding beam assembly of clause 26, wherein the one or more positioning tabs of the first hinge portion comprise plural positioning tabs forming a guide frame having an “I” shape in profile, and the one or more positioning tabs of the second hinge portion comprise plural positioning tabs forming a guide frame having an “I” shape in profile. 
     Clause 28. The folding beam assembly of clause 27, wherein at least one of the plural positioning tabs of the first hinge assembly is provided with a serpentine cut-out, and at least one of the plural positioning tabs of the second hinge assembly is provided with a serpentine cut-out. 
     Clause 29. The folding beam assembly of clause 28, wherein the first hinge portion is secured to the first beam by a weld line along at least part of the serpentine cut-out thereof, and the second beam assembly portion is secured to the second beam by a weld line along at least part of the serpentine cut-out thereof. 
     Clause 30. The folding beam assembly of any one of clauses 19-29, wherein the first beam and the second beam are co-linear when the folding beam assembly is in the unfolded position. 
     Clause 31. The folding beam assembly of any one of clauses 19-29, wherein the first beam and the second beam are not co-linear when the folding beam assembly is in the unfolded position. 
     Clause 32. The folding beam assembly of clause 31, wherein the obverse face of each of the first and second hinge portions is canted a positive angle about the hinge aperture centerline relative to the reverse face thereof. 
     Clause 33. The folding beam assembly of clause 31, wherein the obverse face of each of the first and second hinge portion is not coplanar with the respective reverse face thereof. 
     Clause 34. The folding beam assembly of any one of clauses 19-33, further comprising: 
     (f) a third beam having a fourth end; 
     (g) a third hinge portion secured to the third end and a fourth hinge portion secured to the fourth end, each such hinge portion comprising: 
     (i) a base plate with an obverse face, a reverse face, an upper edge, an opposed lower edge and a base plate vertical centerline; 
     (ii) a hinge section with a hinge section vertical centerline, the hinge section extending from the obverse face and comprising a plurality of spaced-apart hinge leaves symmetrically positioned about the hinge section vertical centerline, with the hinge section vertical centerline being offset from the base plate vertical centerline, each of the plurality of hinge leaves defining a hinge leaf aperture, and with the hinge leaf apertures positioned in horizontal alignment with each other along a hinge aperture centerline; 
     (iii) a locking pin barrel extending from the obverse face and positioned to a first side of the base plate vertical centerline, the locking pin barrel defining a bore; 
     (iv) a plurality of locking pin leaves extending from the obverse face and positioned to the first side of the base plate vertical centerline, each locking pin leaf defining a locking pin aperture, the locking pin apertures positioned in vertical alignment with each other, and with the bore of the locking pin barrel; and 
     (v) a plurality of free interlock leaves extending from the obverse face, each free interlock leaf defining an interlock aperture, with the interlock apertures in vertical alignment with each other, the free interlock leaves positioned to a second side of the base plate vertical centerline at a position so that, when the third beam is in an unfolded position relative to the second beam, the free interlock leaves of each of the third and fourth hinge portions interleave with the locking pin leaves of the other of the third and fourth hinge portions; 
     (h) the hinge leaves of the third hinge portion interleaved with the hinge leaves of the fourth hinge portion, with a hinge pin positioned in the hinge leaf apertures of the interleaved hinge leaves of the third and fourth hinge portions to pivotally join the third hinge portion and the fourth hinge portion and permit the third beam to rotate relative to the second beam; and 
     (i) a third locking pin adapted to be inserted into the bore defined in the locking pin barrel of the third hinge portion and received in (i) the locking pin apertures of the third hinge portion and (ii) the interlock apertures of the fourth hinge portion, when the third beam is in the unfolded position relative to the second beam. 
     Clause 35. The folding beam assembly of clause 34, further comprising a fourth locking pin adapted to be inserted into the bore defined in the locking pin barrel of the fourth hinge portion and received in (i) the locking pin apertures of the fourth hinge portion and (ii) the interlock apertures of the third hinge portion, when the third beam is in the unfolded position relative to the second beam. 
     Clause 36. The folding beam assembly of either of clause 34 or 35, wherein the second beam and the third beam are co-linear when the folding beam assembly is in the unfolded position. 
     Clause 37. The folding beam assembly of either of clause 34 or 35, wherein the second beam and the third beam are not co-linear when the folding beam assembly is in the unfolded position. 
     Clause 38. The folding beam assembly of any one of clause 34, 35 or 37, wherein the obverse face of each of the third and fourth hinge portions is not coplanar with the respective reverse face thereof. 
     Clause 39. The folding beam assembly of any one of clauses 34-38, wherein the hinge aperture centerline of each of the first, second, third and fourth hinge portions is closer to the upper edge of the base plate thereof than to the lower edge thereof. 
     Clause 40. The folding beam assembly of clause 39, wherein the first and second hinge portions are secured to the first and second ends in a first orientation, and the third and fourth hinge portions are secured to the third and fourth ends in a second orientation, where the first orientation is opposite to the second orientation so that the beam assembly folds in an accordion pattern. 
     Clause 41. The folding beam assembly of any one of clauses 34-40, wherein the hinge aperture centerlines of the first and second hinge portions are positioned a hinge pivot distance from the lower edges of the first and second hinge portions sufficient so that the second component portion can rotate relative to the first component portion at least one hundred eighty degrees from a folded position to an unfolded position. 
     Clause 42. The folding beam assembly of clause 41, wherein the hinge aperture centerlines of the third and fourth hinge portions are positioned a hinge pivot distance from the lower edges of the third and fourth hinge portions sufficient so that the third component portion can rotate relative to the second component portion at least one hundred eighty degrees from a folded position to an unfolded position. 
     Clause 43. The folding beam assembly of clause 40, wherein the obverse face of each of the first and second hinge portions is canted a positive angle about the hinge aperture centerline relative to the reverse face thereof. 
     Clause 44. The folding beam assembly of clause 43, wherein the obverse face of each of the third and fourth hinge portions is canted a negative angle about the hinge aperture centerline relative to the reverse face thereof. 
     Clause 45. A foldable enclosure component having a folded position and an unfolded position comprising: 
     (a) a planar first component portion having a planar laminate construction and a first edge, and a first beam reinforcing the planar laminate construction with a first end positioned proximate to the first edge; 
     (b) a planar second component portion having a planar laminate construction and an elongate second edge, and a second beam reinforcing the planar laminate construction with a second end positioned proximate to the second edge, with the first edge of the first component portion positioned proximate to the second edge of the second component portion; 
     (c) the planar laminate construction of each of the first and second component portions comprising: (i) a planar foam panel layer having a first face and an opposed second face, (ii) a planar first metal layer bonded to the first face of the planar foam panel layer, and (iii) a planar second metal layer bonded to the second face of the planar foam panel layer; and 
     (d) a first hinge assembly comprising a first hinge portion and a second hinge portion, the first hinge portion secured to the first end of the first beam and the second hinge portion secured to the second end of the second beam, the first hinge portion pivotally joined to the second hinge portion to permit the second component portion to rotate relative to the first component portion from a folded position to an unfolded position. 
     Clause 46. The foldable enclosure component of clause 45, wherein each of the first hinge portion and the second hinge portion comprises: 
     (i) a base plate with an obverse face, a reverse face, an upper edge, an opposed lower edge and a base plate vertical centerline; 
     (ii) a hinge section with a hinge section vertical centerline, the hinge section extending from the obverse face and comprising a plurality of spaced-apart hinge leaves symmetrically positioned about the hinge section vertical centerline, with the hinge section vertical centerline being offset from the base plate vertical centerline, each of the plurality of hinge leaves defining a hinge leaf aperture, and with the hinge leaf apertures positioned in horizontal alignment with each other along a hinge aperture centerline; 
     (iii) a locking pin barrel extending from the obverse face and positioned to a first side of the base plate vertical centerline, the locking pin barrel defining a bore; 
     (iv) a plurality of locking pin leaves extending from the obverse face and positioned to the first side of the base plate vertical centerline, each locking pin leaf defining a locking pin aperture, the locking pin apertures positioned in vertical alignment with each other, and with the bore of the locking pin barrel; and 
     (v) a plurality of free interlock leaves extending from the obverse face, each free interlock leaf defining an interlock aperture, with the interlock apertures in vertical alignment with each other, the free interlock leaves positioned to a second side of the base plate vertical centerline at a position so that, when the second component portion is in the unfolded position relative to the first component portion, the free interlock leaves of each of the first and second hinge portions interleave with the locking pin leaves of the other of the first and second hinge portions, wherein: 
     (e) the hinge leaves of the first hinge portion interleave with the hinge leaves of the second hinge portion, with a hinge pin positioned in the hinge leaf apertures of the interleaved hinge leaves of the first and second hinge portions to pivotally join the first hinge portion and the second hinge portion and permit the second component portion to rotate relative to the first component portion; and the foldable enclosure component additionally comprises: 
     (f) a first locking pin adapted to be inserted into the bore defined in the locking pin barrel of the first hinge portion and received in (i) the locking pin apertures of the first hinge portion and (ii) the interlock apertures of the second hinge portion, when the second component portion is in the unfolded position relative to the first component portion. 
     Clause 47. The foldable enclosure component of clause 46, further comprising a second locking pin adapted to be inserted into the bore defined in the locking pin barrel of the second hinge portion and received in (i) the locking pin apertures of the second hinge portion and (ii) the interlock apertures of the first hinge portion, when the second component portion is in the unfolded position relative to the first component portion. 
     Clause 48. The foldable enclosure component of either of clause 46 or 47, wherein each of the plurality of spaced-apart hinge leaves of each of the first and second hinge portions has a thickness the same as the other of the plurality of spaced-apart hinge leaves, and the hinge leaves are spaced-apart a distance equal to the thickness. 
     Clause 49. The foldable enclosure component of clause 48, wherein the hinge section vertical centerline of each of the first and second hinge portions is positioned so that the base plate vertical centerline of the first and second hinge portions is offset from the hinge section vertical centerline an offset distance equal to one-half the thickness of any of the plurality of spaced-apart hinge leaves. 
     Clause 50. The foldable enclosure component of any one of clause 46, 47, 48 or 49, wherein each locking pin leaf of each of the first and second hinge portions has an upper face and a lower face which are curved about the hinge aperture centerline. 
     Clause 51. The foldable enclosure component of any one of clause 46, 47, 48, 49 or 50, wherein each free interlock leaf of each of the first and second hinge portions has an upper face and a lower face which are curved about the hinge aperture centerline. 
     Clause 52. The foldable enclosure component of any one of clauses 46-51, wherein the first end of the first beam is received in one or more positioning tabs extending away from the reverse face of the first hinge portion, which one or more positioning tabs are positioned to conform to a profile of the first end of the first beam, and wherein the second end of the second beam is received in one or more positioning tabs extending away from the reverse face of the second hinge portion, which one or more positioning tabs are positioned to conform to a profile of the second end of the second beam. 
     Clause 53. The foldable enclosure component of clause 52, wherein each of the first and second beams has an “I” shape in profile, and the one or more positioning tabs of the first hinge portion comprise plural positioning tabs forming a guide frame having an “I” shape in profile, and the one or more positioning tabs of the second hinge portion comprise plural positioning tabs forming a guide frame having an “I” shape in profile. 
     Clause 54. The foldable enclosure component of clause 53, wherein at least one of the plural positioning tabs of the first hinge portions is provided with a serpentine cut-out, and at least one of the plural positioning tabs of the second hinge portions is provided with a serpentine cut-out. 
     Clause 55. The foldable enclosure component of clause 54, wherein the first hinge portion is secured to the first beam by a weld line along at least part of the serpentine cut-out thereof, and the second beam assembly portion is secured to the second beam by a weld line along at least part of the serpentine cut-out thereof. 
     Clause 56. The foldable enclosure component of any one of clauses 45-55, wherein the first beam and the second beam are co-linear when the folding beam assembly is in the unfolded position. 
     Clause 57. The foldable enclosure component of any one of clauses 45-55, wherein the first beam and the second beam are not co-linear when the folding beam assembly is in the unfolded position. 
     Clause 58. The foldable enclosure component of clause 46, wherein the obverse face of each of the first and second hinge portions is canted a positive angle about the hinge aperture centerline relative to the reverse face thereof. 
     Clause 59. The foldable enclosure component of clause 46, wherein the obverse face of each of the first and second hinge portion is not coplanar with the respective reverse face thereof. 
     Clause 60. The foldable enclosure component of any one of clauses 45-59, wherein the first hinge assembly is adapted to permit the foldable enclosure component to rotate the second component portion relative to the first component portion from a folded position to an unfolded position at least ninety degrees from the folded position. 
     Clause 61. The foldable enclosure component of any one of clauses 45-60, wherein the first hinge assembly is adapted to permit the foldable enclosure component to rotate the second component portion relative to the first component portion from a folded position to an unfolded position at least one hundred eighty degrees from the folded position. 
     Clause 62. The foldable enclosure component of any one of clauses 45-61, further comprising: 
     (g) a second hinge assembly having a third hinge portion and a fourth hinge portion, wherein the third and fourth hinge portions each comprises: 
     (i) a base plate with an obverse face, a reverse face, a first vertical edge, an opposed second vertical edge and a base plate vertical centerline; and 
     (ii) a hinge section with a hinge section vertical centerline, the hinge section extending from the obverse face and comprising a plurality of spaced-apart hinge leaves symmetrically positioned about the hinge section vertical centerline, with the hinge section vertical centerline being offset from the base plate vertical centerline, each of the plurality of hinge leaves defining a hinge leaf aperture, and with the hinge leaf apertures positioned in horizontal alignment with each other along a hinge aperture centerline; 
     (h) a hinge pin positioned in the hinge leave apertures of the third hinge portion and the fourth hinge portion to pivotally join the third hinge portion and the fourth hinge portion; and 
     (i) the third hinge portion secured to the first component portion adjacent the first edge thereof at a location distal from the first hinge assembly, and the fourth hinge portion secured to the second component portion adjacent the second edge thereof at a location distal from the first hinge assembly. 
     Clause 63. The foldable enclosure component of clause 62, further comprising a planar first shield having a thickness and extending from the obverse face of the third hinge portion adjacent the first vertical edge thereof, and a planar second shield having a thickness and extending from the obverse face of the fourth hinge portion adjacent the first vertical edge thereof. 
     Clause 64. The foldable enclosure component of clause 63, further comprising a planar third shield extending from the obverse face of the third hinge portion proximate to the second vertical edge thereof inset an inset distance at equal to or greater than the thickness of the second shield, and a planar fourth shield extending from the obverse face of the fourth hinge portion proximate to the second vertical edge thereof inset an inset distance equal to or greater than the thickness of the first shield. 
     Clause 65. The foldable enclosure component of clause 53, wherein the first beam comprises a pair of elongate opposed flanges, and the foldable enclosure component further comprises a pair of elongate insulating members, each of the pair of insulating members defining a channel in which is positioned a respective one of the pair of opposed flanges. 
     Clause 66. The foldable enclosure component of clause 65, wherein each of the pair of elongate insulating members is polyvinyl chloride. 
     Clause 67. A foldable enclosure component having a folded position and an unfolded position comprising: 
     (a) a planar first component portion having a planar laminate construction and a first edge; 
     (b) a planar second component portion having a planar laminate construction, a second edge and an opposed third edge, with the first edge of the first component portion positioned proximate to the second edge of the second component portion; 
     (c) the planar laminate construction of each of the first and second component portions comprising: (i) a planar foam panel layer having a first face and an opposed second face, (ii) a planar first metal layer having a first face and an opposed second face bonded to the first face of the planar foam panel layer, (iii) a planar second metal layer having a first face bonded to the second face of the planar foam panel layer and an opposed second face; and (iv) a protective layer having an inorganic composition, a first face bonded to the second face of the second metal layer, and an opposed second face; 
     (d) a first hinge assembly comprising a first hinge portion and a second hinge portion joining the planar first component portion and the planar second component portion along their respective first and second edges, the first hinge assembly adapted to permit the second component portion to rotate relative to the first component portion from a folded position to an unfolded position, with the protective layers of the first and second component portions positioned adjacent to each other when the second component portion is in the unfolded position. 
     Clause 68. The foldable enclosure component of clause 67, wherein the first component portion includes a first beam reinforcing the laminate construction of the first component portion, with a first end proximate to the first edge, and a second beam reinforcing the laminate construction of the second component portion, with a second end proximate to the second edge and an opposed third end proximate to the third edge. 
     Clause 69. The foldable enclosure component of clause 68, wherein the first hinge portion and the second hinge portion each comprises: 
     (i) a base plate with an obverse face, a reverse face, an upper edge, an opposed lower edge and a base plate vertical centerline; 
     (ii) a hinge section with a hinge section vertical centerline, the hinge section extending from the obverse face and comprising a plurality of spaced-apart hinge leaves symmetrically positioned about the hinge section vertical centerline, with the hinge section vertical centerline being offset from the base plate vertical centerline, each of the plurality of hinge leaves defining a hinge leaf aperture, and with the hinge leaf apertures positioned in horizontal alignment with each other along a hinge aperture centerline; 
     (iii) a locking pin barrel extending from the obverse face and positioned to a first side of the base plate vertical centerline, the locking pin barrel defining a bore; 
     (iv) a plurality of locking pin leaves extending from the obverse face and positioned to the first side of the base plate vertical centerline, each locking pin leaf defining a locking pin aperture, the locking pin apertures positioned in vertical alignment with each other, and with the bore of the locking pin barrel; 
     (v) a plurality of free interlock leaves extending from the obverse face, each free interlock leaf defining an interlock aperture, with the interlock apertures in vertical alignment with each other, the free interlock leaves positioned to a second side of the base plate vertical centerline at a position so that, when the second component portion is in the unfolded position relative to the first component portion, the free interlock leaves of each of the first and second hinge portions interleave with the locking pin leaves of the other of the first and second hinge portions; wherein 
     (e) the hinge leaves of the first hinge portion interleave with the hinge leaves of the second hinge portion, with a hinge pin positioned in the hinge leaf apertures of the interleaved hinge leaves of the first and second hinge portions to pivotally join the first hinge portion and the second hinge portion and permit the second component portion to rotate relative to the first component portion; and the foldable enclosure component further comprises: 
     (f) a first locking pin adapted to be inserted into the bore defined in the locking pin barrel of the first hinge portion and received in (i) the locking pin apertures of the first hinge portion and (ii) the interlock apertures of the second hinge portion, when the second component portion is in the unfolded position relative to the first component portion. 
     Clause 70. The foldable enclosure component of clause 69, further comprising a second locking pin adapted to be inserted into the bore defined in the locking pin barrel of the second hinge portion and received in (i) the locking pin apertures of the second hinge portion and (ii) the interlock apertures of the first hinge portion, when the second component portion is in the unfolded position relative to the first component portion. 
     Clause 71. The foldable enclosure component of either of clause 69 or 70, wherein each of the plurality of spaced-apart hinge leaves of each of the first and second hinge portions has a thickness the same as the other of the plurality of spaced-apart hinge leaves, and the hinge leaves are spaced-apart a distance equal to the thickness. 
     Clause 72. The foldable enclosure component of clause 71, wherein the hinge section vertical centerline of each of the first and second hinge portions is positioned so that the base plate vertical centerline of the first and second hinge portions is offset from the hinge section vertical centerline an offset distance equal to one-half the thickness of any of the plurality of spaced-apart hinge leaves. 
     Clause 73. The foldable enclosure component of any one of clause 69, 70, 71 or 72, wherein each locking pin leaf of each of the first and second hinge portions has an upper face and a lower face which are curved about the hinge aperture centerline. 
     Clause 74. The foldable enclosure component of any of clause 69, 70, 71, 72 or 73, wherein each free interlock leaf of each of the first and second hinge portions has an upper face and a lower face which are curved about the hinge aperture centerline. 
     Clause 75. The foldable enclosure component of any one of clause 69, 70, 71, 72, 73 or 74, wherein the first end of the first beam is received in one or more positioning tabs extending away from the reverse face of the first hinge portion, which one or more positioning tabs are positioned to conform to a profile of the first end of the first beam, and wherein the second end of the second beam is received in one or more positioning tabs extending away from the reverse face of the second hinge portion, which one or more positioning tabs are positioned to conform to a profile of the second end of the second beam. 
     Clause 76. The foldable enclosure component of clause 70, wherein the first and second beams each has an “I” shape in profile, the one or more positioning tabs of the first hinge portion comprise plural positioning tabs forming a guide frame having an “I” shape in profile, and the one or more positioning tabs of the second hinge portion comprise plural positioning tabs forming a guide frame having an “I” shape in profile. 
     Clause 77. The foldable enclosure component of any one of clauses 67-76, wherein the protective layer of the second component portion rotates away from the protective layer of the first component portion when rotating the second component portion relative to the first component portion from a folded position to an unfolded position. 
     Clause 78. The foldable enclosure component of any one of clause 67-76, wherein the protective layer of the second component portion rotates toward the protective layer of the first component portion when rotating the second component portion relative to the first component portion from a folded position to an unfolded position. 
     Clause 79. The foldable enclosure component of any one of clauses 67-76, further comprising: 
     (e) a planar third component portion having a planar laminate construction and a fourth edge positioned proximate to the third edge of the second component portion, the planar laminate construction of the third component portion comprising (i) a planar foam panel layer having a first face and an opposed second face, (ii) a planar first metal layer bonded to the first face of the planar foam panel layer, and (iii) a planar second metal layer having a first face bonded to the second face of the planar foam panel layer and an opposed second face; and (iv) a protective layer having an inorganic composition, a first face bonded to the second face of the second metal layer and an opposed second face, with the protective layers of the second and third component portions positioned adjacent each other when the second and third component portions are in their unfolded positions; and 
     (f) a second hinge assembly joining the planar second component portion and the planar third component portion along their respective third edge and fourth edge and adapted to permit the third component portion to rotate relative to the second component portion from a folded position to an unfolded position. 
     Clause 80. The foldable enclosure component of clause 79, wherein the protective layer of the first component portion rotates toward the protective layer of the first component portion when rotating the second component portion relative to the first component portion from a folded position to an unfolded position, and the protective layer of the third component portion rotates away from the protective layer of the second component portion when rotating the third component portion relative to the second component portion from a folded position to an unfolded position. 
     Clause 81. The foldable enclosure component of either of clause 79 or 80, wherein the third component portion includes a third beam reinforcing the laminate construction of the third component portion, with a fourth end proximate to the fourth edge, and a second hinge assembly joining the planar second component portion and the planar third component portion along their respective third edge and fourth edge adapted to permit the third component portion to be rotated relative to the second component portion from a folded position to an unfolded position. 
     Clause 82. The foldable enclosure component of clause 81, wherein the second hinge assembly comprises a third hinge portion secured to the third end of the second beam and a fourth hinge portion secured to the fourth end of the third beam, and each of the third hinge portion and the fourth hinge portion comprises: 
     (i) a base plate with an obverse face, a reverse face, an upper edge, an opposed lower edge and a base plate vertical centerline; 
     (ii) a hinge section with a hinge section vertical centerline, the hinge section extending from the obverse face and comprising a plurality of spaced-apart hinge leaves symmetrically positioned about the hinge section vertical centerline, with the hinge section vertical centerline being offset from the base plate vertical centerline, each of the plurality of hinge leaves defining a hinge leaf aperture, and with the hinge leaf apertures positioned in horizontal alignment with each other along a hinge aperture centerline; 
     (iii) a locking pin barrel extending from the obverse face and positioned to a first side of the base plate vertical centerline, the locking pin barrel defining a bore; 
     (iv) a plurality of locking pin leaves extending from the obverse face and positioned to the first side of the base plate vertical centerline, each locking pin leaf defining a locking pin aperture, the locking pin apertures positioned in vertical alignment with each other, and with the bore of the locking pin barrel; and 
     (v) a plurality of free interlock leaves extending from the obverse face, each free interlock leaf defining an interlock aperture, with the interlock apertures in vertical alignment with each other, the free interlock leaves positioned to a second side of the base plate vertical centerline at a position so that, when the third component portion is in the unfolded position relative to the second component portion, the free interlock leaves of each of the first and second hinge portions interleave with the locking pin leaves of the other of the first and second hinge portions; wherein: 
     (g) the hinge leaves of the third hinge portion interleave with the hinge leaves of the fourth hinge portion, with a hinge pin positioned in the hinge leave apertures of the interleaved hinge leaves of the third and fourth hinge portions to pivotally join the third hinge portion and the fourth hinge portion and permit the third component portion to rotate relative to the second component portion; and the foldable enclosure component further comprises: 
     (h) a third locking pin adapted to be inserted into the bore defined in the locking pin barrel of the third hinge portion and received in (i) the locking pin apertures of the third hinge portion and (ii) the interlock apertures of the second hinge portion, when the third component portion is in the unfolded position relative to the second component portion. 
     Clause 83. The foldable enclosure component of clause 82, further comprising a fourth locking pin adapted to be inserted into the bore defined in the locking pin barrel of the fourth hinge portion and received in (i) the locking pin apertures of the fourth hinge portion and (ii) the interlock apertures of the third hinge portion, when the third component portion is in the unfolded position relative to the second component portion. 
     Clause 84. The foldable enclosure component of either of clause 82 or 83, wherein each of the plurality of spaced-apart hinge leaves of each of the third and fourth hinge portions has a thickness the same as the other of the plurality of spaced-apart hinge leaves, and the hinge leaves are spaced-apart a distance equal to the thickness. 
     Clause 85. The foldable enclosure component of clause 84, wherein the hinge section vertical centerline of each of the third and fourth hinge portions is positioned so that the base plate vertical centerline of the third and fourth hinge portions is offset from the hinge section vertical centerline an offset distance equal to one-half the thickness of any of the plurality of spaced-apart hinge leaves. 
     Clause 86. The foldable enclosure component of any one of clause 82, 83, 84 or 85, wherein each locking pin leaf of each of the third and fourth hinge portions has an upper face and a lower face which are curved about the hinge aperture centerline. 
     Clause 87. The foldable enclosure component of any one of clause 82, 83, 84, 85 or 86, wherein each free interlock leaf of each of the third and fourth hinge portions has an upper face and a lower face which are curved about the hinge aperture centerline. 
     Clause 88. The foldable enclosure component of any one of clause 82, 83, 84, 85 or 86, wherein the third end of the second beam is received in one or more positioning tabs extending away from the reverse face of the third hinge portion, which one or more positioning tabs are positioned to conform to a profile of the third end of the second beam, and wherein the fourth end of the third beam is received in one or more positioning tabs extending away from the reverse face of the fourth hinge portion, which one or more positioning tabs are positioned to conform to a profile of the fourth end of the third beam. 
     Clause 89. The foldable enclosure component of clause 88, wherein the third beam has an “I” shape in profile and the one or more positioning tabs of the third hinge portion comprise plural positioning tabs forming a guide frame having an “I” shape in profile, and the one or more positioning tabs of the fourth hinge portion comprise plural positioning tabs forming a guide frame having an “I” shape in profile. 
     Clause 90. The foldable enclosure component of any one of clauses 80-89, wherein the hinge aperture centerline of each of the first, second, third and fourth hinge portions is closer to the upper edge of the base plate thereof than to the lower edge thereof. 
     Clause 91. The foldable enclosure component of clause 90, wherein the first and second hinge portions are respectively oriented so that the hinge aperture centerlines of the first and second hinge portions are closer to the first metal layer of the first and second component portions than to the protective layer of the first and second component portions, and the hinge aperture centerlines of the third and fourth hinge portions are closer to the protective layer of the first and second component portions than to the first metal layer of the first and second component portions. 
     Clause 92. The foldable enclosure component of clause 91, wherein the hinge aperture centerlines of the first and second hinge portions are positioned a hinge pivot distance from the lower edges of the first and second hinge portions sufficient so that the second component portion can rotate relative to the first component portion at least one hundred eighty degrees from a folded position to an unfolded position. 
     Clause 93. The foldable enclosure component of clause 92, wherein the hinge aperture centerlines of the third and fourth hinge portions are positioned a hinge pivot distance from the lower edges of the third and fourth hinge portions sufficient so that the third component portion can rotate relative to the second component portion at least one hundred eighty degrees from a folded position to an unfolded position. 
     Clause 94. The foldable enclosure component of clause 90, wherein the hinge aperture centerlines of the first and second hinge portions extend beyond the first face of the first metal layer of each of the first and second component portions. 
     Clause 95. The foldable enclosure component of any one of clauses 82-94, wherein the hinge aperture centerlines of the third and fourth hinge portions extend beyond the second face of the protective layer of each of the second and third component portions. 
     Clause 96. The foldable enclosure component of any one of clauses 82-95, wherein the locking pin leaf of the plurality of locking pin leaves which is proximate the lower edge of each of the third and fourth hinge portions is extended toward the second side thereof to provide a platform tab. 
     Clause 97. The foldable enclosure component of any one of clauses 67-96, wherein the first hinge assembly is adapted to permit the foldable enclosure component to rotate the second component portion relative to the first component portion from a folded position to an unfolded position at least ninety degrees from the folded position. 
     Clause 98. The foldable enclosure component of any one of clauses 67-97, wherein the first hinge assembly is adapted to permit the foldable enclosure component to rotate the second component portion relative to the first component portion from a folded position to an unfolded position at least one hundred eighty degrees from the folded position. 
     Clause 99. The foldable enclosure component of clause 76, wherein the first beam comprises a pair of elongate opposed flanges proximate to the protective layer, and the foldable enclosure component further comprises a pair of elongate insulating members, each of the pair of insulating members defining a channel in which is positioned a respective one of the pair of opposed flanges. 
     Clause 100. The foldable enclosure component of clause 99, wherein each of the pair of elongate insulating members is polyvinyl chloride. 
     Clause 101. The foldable enclosure component of clause 67-100, wherein the inorganic composition of every protective layer comprises magnesium oxide.