Patent Publication Number: US-2022220723-A1

Title: Liftable Foldable Transportable Buildings

Description:
CROSS-REFERENCES TO RELATED APPLICATIONS 
     This application is a continuation in part of U.S. patent application Ser. No. 17/527,520, filed Nov. 16, 2021, which application is a continuation of PCT Patent Application No. PCT/US/2021/059440, filed Nov. 16, 2021 and which application claims the benefit of U.S. Provisional Application No. 63/188,101, filed May 13, 2021 and U.S. Provisional Application No. 63/136,268, filed Jan. 12, 2021; this application is also a continuation in part of PCT Patent Application No. PCT/US/2021/056415, filed Oct. 25, 2021, which application claims the benefit of U.S. Provisional Application No. 63/196,400, filed Jun. 3, 2021, U.S. Provisional Application No. 63/181,447, filed Apr. 29, 2021 and U.S. Provisional Application No. 63/136,268, filed Jan. 12, 2021; and this application claims the benefit of U.S. Provisional Application No. 63/188,101, filed May 13, 2021, U.S. Provisional Application No. 63/181,447, filed Apr. 29, 2021, and U.S. Provisional Application No. 63/192,349, filed May 24, 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, in an effort to reduce costs. In this regard, significant advancements in the construction of dwellings and commercial space have been made by the current inventors, as exemplified by their patent documents, including U.S. Pat. Nos. 8,474,194, 8,733,029, 10,688,906, 10,829,029, 10,926,689 and 11,220,816. 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 
     In one aspect, the present inventions are directed to a folded building structure transportable to a desired site at which the building structure is to be erected, which comprises a fixed space portion that includes a planar rectangular first floor portion having first and second longitudinal floor edges, first and second transverse floor edges and a thickness, with the first floor portion comprising across its thickness (i) a first structural layer having a first face and an opposing second face; (ii) a foam panel layer having a first face and an opposing second face, the first face of the foam panel layer being bonded to the opposing second face of the first structural layer; (iii) a second structural layer having a first face and an opposing second face, the first face of the second structural layer being bonded to the opposing second face of the foam panel layer; and (iv) a first edge reinforcement proximate the first longitudinal floor edge, and a second edge reinforcement proximate the second longitudinal floor edge. Between the first structural layer and the second structural layer, the first floor portion includes (i) a first fork tube oriented in a transverse direction and spanning the distance from the first longitudinal floor edge to the second longitudinal-floor edge so as to define a first aperture in the first longitudinal floor edge and a second aperture in the second longitudinal floor edge, (ii) a planar elongate longitudinally-oriented first fork tube plate secured to the first edge reinforcement and to the first fork tube; and (iv) a planar elongate longitudinally-oriented second fork tube plate secured to the second edge reinforcement and to the first fork tube. 
     This 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 a structure prepared in accordance with the present inventions. 
         FIG. 2  is a top schematic view of the structure shown in  FIG. 1 . 
         FIG. 3  is an end view of a shipping module from which is formed the finished structure 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, wall 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 design 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. 9A  is a schematic perspective view of a fork tube arrangement for a floor portion in accordance with the present inventions,  FIG. 9B  is a schematic cut-away perspective view of a fork tube arrangement, positioned within a floor portion, in accordance with the present inventions, and  FIG. 9C  is a schematic cut-away perspective view of a floor component in accordance with the present inventions. 
         FIG. 10  is a schematic side view of an I-beam end cap in accordance with the present inventions. 
         FIG. 11A  is a section view of a compression seal in accordance with the present inventions, and  FIG. 11B  is a side view of a roof bottom plate with a compression seal provided in one of its two seal slots in accordance with the present inventions. 
         FIG. 12  is an exploded side view of the junction between a wall vertical interlock and a wall end cap in accordance with the present inventions, and  FIG. 13  is an exploded side view of the junction between a roof bottom plate and a wall end cap in accordance with the present inventions. 
         FIG. 14  is an exploded side view of the junction between an I-beam interlock A and an I-beam interlock B in accordance with the present inventions. 
         FIG. 15  is an exploded side view of the junction between a floor top plate and a wall end cap in accordance with the present inventions. 
         FIG. 16A  is a section view of a shear seal in accordance with the present inventions, and  FIG. 16B  is a side view of a wall end interlock with a shear seal provided in its seal slot in accordance with the present inventions. 
         FIG. 17  is an exploded side view of the junction between a floor top interlock and a wall end interlock A in accordance with the present inventions. 
         FIG. 18  is an exploded side view of the junction between a wall end interlock B and a wall end interlock A in accordance with the present inventions. 
         FIG. 19A  is a side view of the junction between a perimeter board and an I-beam end cap in accordance with the present inventions, and  FIG. 19B  is a depiction of the positioning of an I-beam end cap, a floor top plate, a wall end cap and a perimeter board in accordance with the present inventions. 
         FIG. 20  is a side view of the junction between a roof skirt board and an I-beam end lock in accordance with the present inventions. 
         FIG. 21A  is an exploded perspective view of a finished structure in accordance with the present inventions, depicting suitable locations for the sealing systems of the present inventions on the horizontally positioned enclosure components, and  FIG. 21B  is an exploded perspective view of a finished structure in accordance with the present inventions, depicting correspondingly suitable locations for the sealing systems of the present inventions on the vertically positioned enclosure components. 
         FIG. 22  depicts the layout of a three room structure fabricated in accordance with the present inventions. 
         FIG. 23  is a perspective view of a two story structure fabricated in accordance with the present inventions. 
         FIG. 24  is a perspective view of an exemplary spacer plate in accordance with the present inventions. 
         FIG. 25  is a side view depicting the arrangement of spacer plates in connection with two stacked structures. 
     
    
    
     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 that 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, which has 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 ¶¶ 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 embodiments of such structural members, which also incorporate hinge structures, are described in U.S. Nonprovisional patent application Ser. No. 17/527,520 entitled “Folding Beam Systems”, filed Nov. 16, 2021 and having the same inventors as this disclosure. The contents of that U.S. Nonprovisional patent application Ser. No. 17/527,520 entitled “Folding Beam Systems”, filed Nov. 16, 2021 and having the same inventors as this disclosure, is incorporated by reference as if fully set forth herein, particularly the description of the hinged load transfer components set forth for example in ¶¶ 0074-0089 and 0104-0126 and in FIGS. 8A-13E and 15A-24A thereof, as well as the description of the associated end hinge assemblies set forth for example in ¶¶0090-0093 and 0127-0132 and in FIGS. 14A-14B, 24B and 25A-25D 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 fourth wall portion  200   s - 4  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, 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 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 floor 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 comprises two identical hinge assembly portions  330 A partnered together to form a pivoted junction, as shown in  FIGS. 8A and 8B . A detailed description of the construction of hinge assembly  329 A and its hinge assembly portions  330 A is set forth in U.S. Nonprovisional patent application Ser. No. 17/527,520 entitled “Folding Beam Systems”, filed Nov. 16, 2021 and having the same inventors as the subject application. The contents of that U.S. Nonprovisional patent application Ser. No. 17/527,520 entitled “Folding Beam Systems”, filed Nov. 16, 2021 and having the same inventors as the subject application, is incorporated by reference as if fully set forth herein, particularly the description of the construction of hinge assembly  329 A and its hinge assembly portions  330 A set forth for example in ¶¶0075-0087 and in FIGS. 9-12 and 13C-13E thereof. 
     In the embodiment of floor component  300  utilized in the structure  150  of  FIGS. 1-5 , 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. 9C . Floor end hinge assembly  345 A comprises two identical floor end hinge portions  350 A (not specified in the figures). A description of the construction of floor end hinge assembly  345 A and its floor end hinge portions  350 A is set forth in U.S. Nonprovisional patent application Ser. No. 17/527,520 entitled “Folding Beam Systems”, filed Nov. 16, 2021 and having the same inventors as the subject application. The contents of that U.S. Nonprovisional patent application Ser. No. 17/527,520 entitled “Folding Beam Systems”, filed Nov. 16, 2021 and having the same inventors as the subject application, is incorporated by reference as if fully set forth herein, particularly the description of the construction of floor end hinge assembly  345 A and its floor end hinge portions  350 A set forth for example in ¶¶0090-0093 and in FIGS. 14A-14B thereof. 
     D. Integral Floor Lifting Structure 
     Optionally, a structure for facilitating the movement of shipping module  100  can be provided in floor portion  300   a . In particular,  FIG. 9A  depicts two fork tubes,  360   a  and  360   b . These fork tubes  360   a ,  360   b  are spaced-apart elongate members and oriented in the transverse direction within floor portion  300   a  as shown, for example, in  FIG. 9B . Fork tubes  360   a ,  360   b  flank an I-beam  326   a  between them, which I-beam  326   a  assists in the transfer of vertical loads to the fourth footing beam  320  that is adjacent second longitudinal floor edge  119 , as shown, for example, in  FIG. 9B , and to the reinforcing board  307  that is positioned in floor portion  300   a  adjacent interior edge  301   a  as shown, for example, in  FIG. 9C . Hinge assembly  329 A assists in further transferring those vertical loads to I-beam  326   b  positioned in floor portion  300   b , and then to second footing beam  320  adjacent first longitudinal floor edge  117 . The specifics of I-beams  326   a ,  326 B and hinge assembly  329 A are disclosed in U.S. Provisional Patent Application No. 63/188,101, filed May 13, 2021, entitled “Folding Beam Systems” and having the same inventors as the subject application. The contents of that U.S. Provisional Patent Application No. 63/188,101, filed May 13, 2021, entitled “Folding Beam Systems” and having the same inventors as the subject application, are incorporated by reference as if fully set forth herein, particularly the descriptions of the beam and hinge assemblies set forth for example in ¶¶0073-0087 and in FIGS. 8A-13B thereof. Fork tubes  360   a ,  360   b  in the embodiment shown herein have a rectangular cross section and are made for example of steel. The specifics of I-beams  326   a ,  326 B and hinge assembly  329 A are also set forth in U.S. Nonprovisional patent application Ser. No. 17/527,520 entitled “Folding Beam Systems”, filed Nov. 16, 2021 and having the same inventors as the subject application, as mentioned above. The contents of that U.S. Nonprovisional patent application Ser. No. 17/527,520 entitled “Folding Beam Systems”, filed Nov. 16, 2021 and having the same inventors as the subject application, are likewise incorporated by reference as if fully set forth herein, particularly the description of I-beams  326   a ,  326 B and hinge assembly  329 A set forth for example in ¶¶ 0074-0089 and in FIGS. 8A-13E thereof 
       FIG. 9B  depicts the placement of fork tubes  360   a ,  360   b  within the structure of floor portion  300   a . Each fork tube  360   a ,  360   b  rests on, or is defined in part by, sheet metal layer  205 , and channels are provided in foam panels  214  (not shown in  FIG. 9 ) to accommodate the fork tubes. Fork tubes  360   a , and  360   b  are of sufficient length to span the distance between second longitudinal floor edge  119  and interior edge  301   a  of floor portion  300   a , and thus present rectangular apertures  362  at each of these two edges. In this regard, cut-outs (not visible) are provided in the fourth footing beam  320  adjacent second longitudinal floor edge  119 , and, as shown in  FIG. 9B , in the reinforcing board  307  that is positioned in floor portion  300   a  adjacent interior edge  301   a , to permit fork tubes  360   a ,  360   b  to pass through footing beam  320  and reinforcing board  307 . Likewise, cut-outs (not visible) are provided in I-beam end cap  221  (e.g., shown in  FIG. 10 ) positioned adjacent second longitudinal floor edge  119 , and in I-beam interlock  251  (e.g., shown in  FIGS. 14 and 21A ) positioned adjacent interior edge  301   a , to permit fork tubes  360   a ,  360   b  to pass through that I-beam end cap  221  and I-beam interlock  251 . 
     Referring still to  FIGS. 9A-B , there is provided a fork tube plate  361   a  positioned against fourth footing beam  320 , and there is provided a fork tube plate  361   b  positioned against fourth footing beam  320 . Fork tube plate  361   a  approximately spans the longitudinal distance between I-beam  326   a  and fork tube  360   a , and extends beyond fork tube  360   a  in the longitudinal direction toward first transverse floor edge  120 . Similarly, fork tube plate  361   b  approximately spans the longitudinal distance between I-beam  326   a  and fork tube  360   b , and extends beyond fork tube  360   b  in the longitudinal direction toward second transverse floor edge  118 . 
     In like manner, there is provided a fork tube plate  361   c  (visible in  FIG. 9A ), which is positioned against the reinforcing board  307  within floor portion  300   a  that is adjacent interior edge  301   a , and there is provided a fork tube plate  361   d  (visible in  FIG. 9A ), which is positioned against the reinforcing board  307  within floor portion  300   a  that is adjacent interior edge  301   a . Fork tube plate  361   c  approximately spans the longitudinal distance between I-beam  326   a  and fork tube  360   a , and extends beyond fork tube  360   a  in the longitudinal direction toward first transverse floor edge  120 . Similarly, fork tube plate  361   d  approximately spans the longitudinal distance between I-beam  326   a  and fork tube  360   b , and extends beyond fork tube  360   b  in the longitudinal direction toward second transverse floor edge  118 . Fork tube plates  361   a ,  361   b ,  361   c  and  361   d  in the embodiment shown herein are made for example of steel. 
     Fork tube plates  361   a  and  361   b  can be secured to fourth footing beam  320  with adhesive and/or fasteners such as screws, and fork tube plates  361   c  and  361   d  can be secured to the reinforcing board  307  within floor portion  300   a  which is adjacent interior edge  301   a  with adhesive and/or fasteners such as screws. In addition, fork tube plates  361   a  and  361   c  can be secured to fork tube  360   a , and fork tube plates  361   b  and  361   d  can be secured to fork tube  360   b , in each case utilizing for example fasteners or welding. 
     The employment of fork tubes  360   a ,  360   b  in the movement of shipping module  100  is described below. 
     Roof Component ( 400 ) 
     Typically, 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 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  5 , 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. 
     In the shipping module  100  shown in  FIG. 3 , roof portions  400   a ,  400   b  and  400   c  preferably are accordion folded (stacked), 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 . 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. Thus to realize the accordion folded configuration shown in  FIG. 3  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 stacked 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 stacked 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 structural members, which also incorporate hinge structures suitable 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 in in U.S. Nonprovisional patent application Ser. No. 17/527,520 entitled “Folding Beam Systems”, filed Nov. 16, 2021 and having the same inventors as this disclosure. The contents of that U.S. Nonprovisional patent application Ser. No. 17/527,520 entitled “Folding Beam Systems”, filed Nov. 16, 2021 and having the same inventors as this disclosure, is incorporated by reference as if fully set forth herein, particularly the description of the load transfer components set forth for example in ¶¶ 0104-0126 and in FIGS. 15A-24A thereof, as well as the description of the associated end hinge assemblies set forth for example in ¶¶ 0127-0132 and in FIGS. 24B and 25A-25D thereof. 
     Enclosure Component Sealing Systems 
     Structure  150  can utilize the enclosure component sealing systems described below to limit or prevent the ingress of rain water, noise and outside air into the interior of structure  150 . 
     A. General Description 
     The enclosure component sealing systems for structure  150  utilize the sealing structures described below. Except for I-beam end cap  221 , which functions to seal the edges of select enclosure components  155 , the enclosure component sealing systems comprise in general terms two enclosure component sealing structures, paired in in pressing contact in different combinations, to seal the junctions between different regions of the enclosure components  155  found in structure  150 . These junctions consist of either two interior edges of adjacent enclosure component portions, positioned edge-to-edge when structure  150  is unfolded, or an exterior edge of an enclosure component  155  which abuts an interior surface of another enclosure component  155 . Where an enclosure component sealing structure is positioned on an interior or exterior edge of an enclosure component  155 , there can respectively be provided interior edge reinforcement or exterior edge reinforcement between the sealing structure and the respective interior or exterior edge of the foam panel layer  213  in the case where the multi-layered, laminate design depicted in  FIG. 7  is utilized (such that the enclosure component sealing structure is positioned proximate to the interior or exterior edge, as the case may be, of the foam panel layer  213 ). The specific enclosure component sealing structures described below are I-beam end cap  221 ; wall vertical interlock  245 ; wall end cap  246 ; I-beam interlock A  250 ; I-beam interlock B  251 ; floor top plate  252 ; roof bottom plate  255 ; floor top interlock  261 ; wall end interlock A  262 ; and wall end interlock B  263 . Excepting I-beam end cap  221 , each of the foregoing enclosure component sealing structures utilizes either two or more compression seals  230 , or one shear seal  260 , which are also described below. Exemplary placements of the enclosure component sealing structures described herein are found in Subsections B. through J. below and also in the Section below entitled “Enclosure Component Sealing Structure Exemplary Placements”. 
     The current inventions include two closure boards, namely perimeter board  310  and roof skirt board  280 . These closure boards, which are described below, are utilized in conjunction with I-beam end cap  221  to provide additional sealing, as well as to realize additional benefits. 
     B. I-Beam End Cap ( 221 ) 
     I-beam end cap  221 , shown in cross-section in  FIG. 10 , is a rigid elongate member that is fastened to the periphery of select enclosure components  155 , preferably the exterior edges of floor component  300  and roof component  400 . I-beam end cap  221  constitutes an edge seal that performs a sealing function against water ingress into and environmental exposure of the edge of the enclosure component  155  to which it is secured, and imparts impact resistance to that edge. 
       FIG. 10  shows an exemplary installation of I-beam end cap  221  secured to the edge of a schematic representation of floor portion  300   a . In particular, I-beam end cap  221  has an elongate seal plate  223  with seal plate  223  having an elongate interior face  226  and an opposing elongate planar exterior face  227 . I-beam end cap  221  has a length and width the same, or substantially the same, as the length and width of the exterior edge of floor portion  300   a , so as to cover the entirety, or substantially the entirety, of the exterior edge of floor portion  300   a.    
     At the mid-point of the interior face  226  of seal plate  223 , there is provided an elongate key  222 , which is rectangular in cross section (as shown in  FIG. 10 ), and has a length the same, or substantially the same, as the length of I-beam end cap  221 . Key  222  is received in a corresponding slot formed in the exterior edge reinforcement positioned on the exterior edge of the enclosure component  155  to which I-beam end cap  221  is secured. Thus for example,  FIG. 9  depicts key  222  of an I-beam end cap  221  received in slot  422  of a shoulder beam  435  of roof portion  400   a . Each of the top and bottom edges of I-beam end cap  221  define locating slots  229 . In the case where the enclosure component  155  utilizes the enclosure component laminate design shown in  FIG. 7 , locating slots  229  receive the edge portions  207  of metal sheets  206  and  217  (of sheet metal layers  205  and  216  respectively), bent down at a ninety degree (90°) angle, as shown in  FIG. 9 . 
     Still referring to  FIG. 10 , the exterior face  227  of seal plate  223  of I-beam end cap  221  includes an elongate accessory slot  224 , which is rectangular in cross section and has a length the same, or substantially the same, as the length of the exterior face  227  of I-beam end cap  221 . The exterior face  227  further includes a plurality of elongate fastener locating grooves  225 , each of which has a length the same, or substantially the same, as the length of seal plate  223 . I-beam end cap  221  can be secured to an exterior edge of an enclosure component  155 , such as the roof portion  400   a  shown in  FIG. 9  and the floor portion  300   a  shown in  FIG. 10 , for example by adhesive applied to interior face  226 , or by fasteners, such as screw or nail fasteners, spaced apart along the length of I-beam end cap  221  and driven through the exterior face  227 , or by utilizing a combination of adhesive and fasteners. Locating grooves  225  assist in accurate positioning of such fasteners. 
     C. Compression Seal ( 230 ) 
     A number of the enclosure component sealing systems described herein and utilized in structure  150  include a compression seal system. An element of that compression seal system is a compression seal  230 . 
     Compression seal  230 , which is shown in cross-section in  FIG. 11A , is an elongate member having in cross-section an elongate base  231  with an elongate arched portion  232  that is flanked by two elongate winglets  233 . At the intersection of the arched portion  232  of base  231  and each of the winglets  233 , there are provided two opposed elongate seal walls  234 , joined to and extending away from base  231  in a diverging relationship at a divergence angle θ, where θ&lt;180°, for example θ&lt;90° or in the range of 40°&lt;θ&lt;50°. It is most preferred that θ be the same, or nearly so, as the divergence angle c of the slot walls  244  described below. Thus as shown in  FIG. 11A , the ends of the seal walls  234  distal from base  231  are further apart than the ends of the seal walls proximate to base  231 . 
     At the ends of the seal walls  234  distal from base  231 , each seal wall  234  is joined to an elongate arcuate buttress  235 . The end of each arcuate buttress  235 , distal from the seal wall  234  to which it is joined, is in turn joined to a respective planar elongate seal surface  236 ; thus there are two planar seal surfaces  236  in compression seal  230 . The planar seal surfaces  236  extend away from the seal walls  234  in a converging relationship at a convergence angle δ, where δ&lt;180°, for example 90°. Thus the ends of seal surfaces  236  distal from arcuate buttresses  235  are closer together than the ends of seal surfaces  236  proximate to arcuate buttresses  235 . The ends of seal surfaces  236  distal from arcuate buttresses  235  are joined by an elongate seal closure  237 . The base  231 , seal walls  234 , arcuate buttresses  235 , seal surfaces  236  and seal closure  237  thereby define a hollow elongate seal chamber  238 , as shown in  FIG. 11A . Seal closure  237  is curved in shape toward seal chamber  238 , such as to assume a cupped appearance. 
     Seal  230  is intended to be received in an elongate seal slot  240 , shown for example in  FIG. 11B . Slot  240  in general has a dovetail shape, with an elongate planar floor  241  flanked by two elongate lateral grooves  242 , and with an elongate planar slot wall  244  abutting and extending from each groove  242  toward an elongate shoulder  243  at the surface of the slot  240 . Thus there are two opposed shoulders  243  in seal slot  240 . The planar slot walls  244  extend away from grooves  242  in a diverging relationship at a divergence angle ε, where ε&lt;180° (for example ε&lt;90° or in the range of 40°&lt;ε&lt;50°), such that the edges of slot walls  244  coincident with shoulders  243  are further apart than the edges of slot walls  244  abutting grooves  242 . Compression seal  230  is dimensioned to snugly fit within slot  240 , as shown in  FIG. 11B , such that winglets  233  are received in grooves  242  and the arched portion  232  of base  231  is compressed sufficiently to provide a resilient force that urges winglets  233  into grooves  242  and causes seal  230  to be retained in its proper position in slot  240  during fabrication and following fabrication of the enclosure component  155 . 
     When two enclosure components  155  on which are mounted two paired enclosure component sealing structures, one of which bears a compression seal  230 , are appropriately positioned and pressed together, compression seal  230  will be squeezed against the planar exterior face  227  of the opposed seal plate  223 , which causes seal closure  237  and arcuate buttresses  235  to be urged into seal chamber  238 . This permits the two planar exterior faces  227  of the pressed-together seal plates  223  of the paired sealing structures to come into full contact. At the same time, arcuate buttresses  235  rotate down and seal surfaces  236  are urged into a generally coplanar relationship (with arcuate buttresses  238  functioning as hinges) with the opposing planar exterior face  227  pressing against it, to create two lines of sealing. 
     Compression seal  230  can be fabricated from a resilient material, such as rubber or plastic, for example polyurethane. Particular embodiments of enclosure component sealing structures utilizing the foregoing compression sealing system are described below. 
     D. Wall Vertical Interlock ( 245 ), Wall End Cap ( 246 ) Sealing System 
       FIG. 12  depicts in exploded form the junction between a wall vertical interlock  245  and a wall end cap  246 . The particular junction is shown for illustrative purposes between wall portion  200   s - 1  and  200   s - 2 , with wall vertical interlock  245  positioned on the interior vertical edge of wall portion  200   s - 2  (interior vertical edge  192 - 2  shown in  FIG. 2 ) and wall end cap  246  positioned on the interior vertical edge of wall portion  200   s - 1  (interior vertical edge  192 - 1  shown in  FIG. 2 ). In structure  150 , wall vertical interlock  245  and wall end cap  246  shown in  FIG. 12  are vertically-oriented. 
     In particular, wall vertical interlock  245  is a rigid elongate member that has an elongate seal plate  223  with an elongate interior face  226  and an opposing elongate planar exterior face  227 . The exterior face  227  preferably is hard and smooth to provide a good sealing surface. Seal plate  223  has a length and width the same, or substantially the same, as the length and width of the interior edge of wall portion  200   s - 2 , so as to cover the entirety, or substantially the entirety, of that interior edge of wall portion  200   s - 2 . 
     As shown in  FIG. 12 , at the mid-point of the interior face  226  of wall vertical interlock  245  there is provided an elongate key  222 , which is rectangular in cross section has a length the same, or substantially the same, as the length of seal plate  223 . Key  222  is received in a corresponding elongate slot formed in the interior edge reinforcement positioned on the interior vertical edge of wall portion  200   s - 2 , to which wall vertical interlock  245  is secured. Each of the top and bottom edges of wall vertical interlock  245  define elongate locating slots  229  for receiving the edge portions of sheet metal layers  205  and  216 , when bent down at a ninety degree (90°) angle. In addition, the edge of one of the slots  229  abutting the interior face  226  of wall vertical interlock  245  is terminated an inset distance “I” from the opposing edge of that slot, where I is the thickness of the protective layer  218 , such as magnesium oxide (MgO) board. 
     Still referring to  FIG. 12 , at the mid-point of the exterior face  227  of seal plate  223  of wall vertical interlock  245  there is provided an elongate interlock slot  228 , which is rectangular in cross-section and has a length the same, or substantially the same, as the length of the exterior face  227  of wall vertical interlock  245 . Two elongate seal slots  240  are defined on the exterior face  227  of wall vertical interlock  245 , one above interlock slot  228  and the other below interlock slot  228 , as shown in  FIG. 12 . Each slot  240  has a length the same, or substantially the same, as the length of wall vertical interlock  245 . 
     Wall vertical interlock  245  can be secured to the vertical edge of wall portion  200   s - 2  shown in  FIG. 12  for example by adhesive applied to interior face  226 , or by fasteners, such as screw or nail fasteners, spaced apart along the length of wall vertical interlock  245  and driven through the exterior face  227 , or by utilizing a combination of adhesive and fasteners. 
       FIG. 12  additionally depicts a wall end cap  246 . Wall end cap  246  shown in  FIG. 12  is a rigid elongate member that is defined by an elongate seal plate  223  having an elongate interior face  226  and an opposing elongate planar exterior face  227 . The exterior face  227  preferably is hard and smooth to provide a good sealing surface. Seal plate  223  has a length and width the same, or substantially the same, as the length and width of the exterior edge of wall portion  200   s - 1 , so as to cover the entirety, or substantially the entirety, of the vertical edge of wall portion  200   s - 1  shown in in  FIG. 12 . 
     At the mid-point of the interior face  226  of wall end cap  246  show in in  FIG. 12  there is provided an elongate key  222 , which is rectangular in cross-section and has a length the same, or substantially the same, as the length of seal plate  223 . Key  222  of wall end cap  246  is received in a corresponding elongate slot formed in the interior edge reinforcement, positioned on the interior vertical edge of wall portion  200   s - 1 , to which wall end cap  246  is secured. Each of the top and bottom edges of wall end cap  246  define elongate locating slots  229  for receiving the edge portions of sheet metal layers  205  and  216 , when bent down at a ninety degree (90°) angle. In addition, the edge of one of the slots  229  abutting the interior face  226  of wall end cap  246  is terminated an inset distance “I” from the opposing edge of that slot, where I is the thickness of the protective layer  218 , such as magnesium oxide (MgO) board. 
     Wall end cap  246  can be secured to the vertical edge of wall portion  200   s - 1  shown in  FIG. 12  for example by adhesive applied to interior face  226 , or by fasteners, such as screw or nail fasteners, spaced apart along the length of wall end cap  246  and driven through the exterior face  227 , or by utilizing a combination of adhesive and fasteners. 
     In  FIG. 12 , wall vertical interlock  245  mates with wall end cap  246 . For this purpose, at the mid-point of the exterior face  227  of seal plate  223  of wall end cap  246  there is provided an elongate interlock key  247 , which is rectangular in cross-section and has a length the same, or substantially the same, as the length of the exterior face  227  of wall end cap  246 . Interlock key  247  mates with interlock slot  228  when wall vertical interlock  245  and wall end cap  246  are pressed together. Additionally, the two edges of wall end cap  246  are provided with elongate coupling ridges  248  which mate with elongate coupling insets  249  located at the edges of wall vertical interlock  245 . Coupling ridges  248  and coupling insets  249  can have the same, or approximately the same, lengths as wall end cap  246  and wall vertical interlock  245  respectively. 
     Prior to mating wall vertical interlock  245  with wall end cap  246 , a compression seal  230  is placed in each of the two seal slots  240  of wall vertical interlock  245 , with each seal  230  having the same, or approximately the same, length as the slot  240  in which it is inserted. When wall vertical interlock  245  with wall end cap  246  are pressed together in a mating relationship, the two compression seals  230  are deformed in the manner described previously to provide four lines of sealing between wall vertical interlock  245  and wall end cap  246 . 
     E. I-Beam Interlock A ( 250 ), I-Beam Interlock B ( 251 ) Sealing System 
       FIG. 14  depicts in exploded form the junction between an I-beam interlock A  250  and an I-beam interlock B  251 , each shown in cross-section. The particular junction is shown for illustrative purposes between roof portion  400   b  and roof portion  400   c , with I-beam interlock A  250  positioned on the interior edge  412   c  of roof portion  400   c , and with I-beam interlock B  251  positioned on first interior edge  412   b  of roof portion  400   b . In structure  150 , I-beam interlock A  250  and I-beam interlock B  251  shown in  FIG. 14  are horizontally oriented. 
     In particular, I-beam interlock A  250  is a rigid elongate member that is defined by an elongate seal plate  223  having an elongate interior face  226  and an opposing elongate planar exterior face  227 . The exterior face  227  preferably is hard and smooth to provide a good sealing surface. Seal plate  223  has a length and width the same, or substantially the same, as the length and width of the interior edge  412   c  of roof portion  400   c  shown in  FIG. 14 , so as to cover the entirety, or substantially the entirety, of that interior edge. 
     As shown in  FIG. 14 , at the mid-point of the interior face  226  of I-beam interlock A  250  there is provided an elongate key  222 , which has a rectangular cross-section and a length the same, or substantially the same, as the length of I-beam interlock A  250 . Key  222  is received in a corresponding elongate slot formed in the interior edge reinforcement positioned on the horizontal edge of roof portion  400   c , to which I-beam interlock A  250  is secured. Each of the top and bottom edges of I-beam interlock A  250  define elongate locating slots  229  for receiving the edge portions of sheet metal layers  205  and  216 , bent down at a ninety degree (90°) angle. In addition, the edge of one of the slots  229  abutting the interior face  226  of I-beam interlock A  250  is terminated an inset distance “I” from the opposing edge of that slot, where I is the thickness of the protective layer  218 , such as magnesium oxide (MgO) board. 
     Still referring to  FIG. 14 , in the lower half of the exterior face  227  of seal plate  223  of I-beam interlock A  250  there is provided an elongate interlock slot  228 , which has a rectangular cross-section and a length the same, or substantially the same, as the length of the exterior face  227  of I-beam interlock A  250 . Three elongate seal slots  240  are defined on the exterior face  227  of I-beam interlock A  250 , two above interlock slot  228  and one below interlock slot  228 , as shown in  FIG. 14 . Each seal slot  240  has a length the same, or substantially the same, as the length of I-beam interlock A  250 . 
     I-beam interlock A  250  can be secured to the interior edge  412   c  of roof portion  400   c  shown in  FIG. 14  for example by adhesive applied to interior face  226 , or by fasteners, such as screw or nail fasteners, spaced apart along the length of I-beam interlock A  250  and driven through the exterior face  227 , or by utilizing a combination of adhesive and fasteners. 
       FIG. 14  additionally depicts an I-beam interlock B  251 . I-beam interlock B  251  is a rigid elongate member that is defined by an elongate seal plate  223  having an elongate interior face  226  and an opposing elongate planar exterior face  227 . The exterior face  227  preferably is hard and smooth to provide a good sealing surface. Seal plate  223  has a length and width the same, or substantially the same, as the length and width of the first interior edge  412   b  of roof portion  400   b , so as to cover the entirety, or substantially the entirety, of that interior edge. 
     At the mid-point of the interior face  226  of I-beam interlock B  251  shown in in  FIG. 14  there is provided an elongate key  222 , which has a rectangular cross-section and a length the same, or substantially the same, as the length of I-beam interlock B  251 . Key  222  of I-beam interlock B  251  is received in a corresponding elongate slot formed in the exterior edge reinforcement positioned on first interior edge  412   b  of roof portion  400   b , to which I-beam interlock B  251  is secured. Each of the top and bottom edges of I-beam interlock B  251  define elongate locating slots  229  for receiving the edge portions of sheet metal layers  205  and  216 , bent down at a ninety degree (90°) angle. In addition, the edge of one of the slots  229  abutting the interior face  226  of wall end cap  246  is terminated an inset distance “I” from the opposing edge of that slot, where I is the thickness of the protective layer  218 , such as magnesium oxide (MgO) board. 
     I-beam interlock B  251  can be secured to the first interior edge  412   b  of roof portion  400   b  for example by adhesive applied to interior face  226 , or by fasteners, such as screw or nail fasteners, spaced apart along the length of I-beam interlock B  251  and driven through the exterior face  227 , or by utilizing a combination of adhesive and fasteners. 
     In  FIG. 14 , I-beam interlock A  250  mates with I-beam interlock B  251 . For this purpose, in the lower half of the exterior face  227  of seal plate  223  of I-beam interlock B  251  there is provided an elongate interlock key  247 , which has a rectangular cross-section and a length the same, or substantially the same, as the length of I-beam interlock B  251 . Interlock key  247  mates with interlock slot  228  when I-beam interlock A  250  and I-beam interlock B  251  are pressed together. Additionally, the exterior edges of I-beam interlock B  251  are provided with elongate coupling ridges  248  which mate with elongate coupling insets  249  located at the exterior edges of I-beam interlock A  250 . Coupling ridges  248  and coupling insets  249  can have the same, or approximately the same, lengths as I-beam interlock A  250  and I-beam interlock B  251  respectively. 
     Prior to mating I-beam interlock A  250  with I-beam interlock B  251 , a compression seal  230  is placed in each of the three seal slots  240  of I-beam interlock A  250 , with each seal  230  having the same, or approximately the same, length as the slot  240  in which it is inserted. When I-beam interlock A  250  and I-beam interlock B  251  are pressed together in a mating relationship, the three compression seals  230  are deformed in the manner described previously to provide six lines of sealing between I-beam interlock A  250  and I-beam interlock B  251 . 
     F. Floor Top Plate ( 252 ), Wall End Cap ( 246 ) Sealing System 
       FIG. 15  depicts in exploded form the junction between a floor top plate  252  and a wall end cap  246 , each shown in cross-section. The particular junction is shown for illustrative purposes between wall component  200 R and floor portion  300   a , with floor top plate  252  positioned along the upper surface of floor portion  300   a  adjacent second longitudinal floor edge  119 , and with wall end cap  246  positioned on the bottom edge of wall component  200 R. In structure  150 , wall  200 R shown in  FIG. 15  is vertically oriented and floor portion  300   a  is horizontally oriented. 
     In particular, floor top plate  252  in  FIG. 15  is a rigid elongate member that has an elongate seal plate  223  with an elongate interior face  226  and an opposing elongate planar exterior face  227 . The exterior face  227  preferably is hard and smooth to provide a good sealing surface. Seal plate  223  has a length the same, or substantially the same, as the length of second longitudinal floor edge  119 , so as to cover the top edge of floor portion  300   a  proximate to second longitudinal floor edge  119 . Seal plate  223  of floor top plate  252  has a width the same, or substantially the same, as the width of wall component  200 R. The floor top plate  252  preferably has a thickness “J” sufficient to accommodate the thickness of any protective layer  218  and/or flooring used to surface floor portion  300   a , such as stone, wood or carpeting. 
     As shown in  FIG. 15 , at the exterior edge of the interior face  226  of floor top plate  252 , proximate to second longitudinal floor edge  119 , there is provided a series of elongate stepped locating ridges  254 . These stepped locating ridges, which have a length the same, or substantially the same, as the length of floor top plate  252 , mesh with the corresponding stepped locating ridges  253  shown on I-beam end cap  221  depicted in  FIG. 10  and with dashed lines in  FIG. 15 . 
     Still referring to  FIG. 15 , at the mid-point of the exterior face  227  of seal plate  223  of floor top plate  252  there is provided an elongate interlock slot  228 , which has a rectangular cross-section and a length the same, or substantially the same, as the length of floor top plate  252 . Two elongate seal slots  240  are defined on the exterior face  227  of floor top plate  252 , one on each side of interlock slot  228 , as shown in  FIG. 15 . Each slot  240  has a length the same, or substantially the same, as the length of floor top plate  252 . 
     Floor top plate  252  can be secured to the top edge of floor portion  300   a  proximate to second longitudinal floor edge  119  shown in  FIG. 15  for example by adhesive applied to interior face  226 , or by fasteners, such as screw or nail fasteners, spaced apart along the length of floor top plate  252  and driven through the exterior face  227 , or by utilizing a combination of adhesive and fasteners. 
       FIG. 15  additionally depicts a wall end cap  246  positioned along the bottom edge of wall component  200 R. The design of wall end cap  246  was previously described in connection with  FIG. 12 . The seal plate  223  of wall end cap  246  shown in  FIG. 15  has a length and width the same, or substantially the same, as the length and width of the bottom edge of wall component  200 R, so as to cover the entirety, or substantially the entirety, of the bottom edge of wall component  200 R shown in in  FIG. 15 . 
     Wall end cap  246  can be secured to the bottom edge of wall component  200 R shown in  FIG. 15  for example by adhesive applied to interior face  226 , or by fasteners, such as screw or nail fasteners, spaced apart along the length of wall end cap  246  and driven through the exterior face  227 , or by utilizing a combination of adhesive and fasteners. 
     In  FIG. 15 , floor top plate  252  mates with wall end cap  246 . For this purpose, the interlock key  247  of wall end cap  246  is provided with a length the same, or substantially the same, as the length of the exterior face  227  of floor top plate  252 . That interlock key  247  mates with the interlock slot  228  of floor top plate  252  when floor top plate  252  and wall end cap  246  are pressed together, with the elongate coupling ridges  248  of wall end cap  246  mating with the elongate coupling insets  249  of floor top plate  252 . Coupling ridges  248  and coupling insets  249  can have the same, or approximately the same, lengths as wall end cap  246  and floor top plate  252  respectively. 
     Prior to mating wall end cap  246  and floor top plate  252 , a compression seal  230  is placed in each of the two seal slots  240  of floor top plate  252 , with each seal  230  having the same, or approximately the same, length as the seal slot  240  in which it is inserted. When wall vertical interlock  245  and wall end cap  246  are pressed together in a mating relationship, the two compression seals  230  are deformed in the manner described previously to provide four lines of sealing between wall end cap  246  and floor top plate  252 . 
     G. Roof Bottom Plate ( 255 ), Wall End Cap ( 246 ) Sealing System 
       FIG. 13  depicts in exploded form the junction between a roof bottom plate  255  and a wall end cap  246 , each shown in cross-section. The particular junction shown for illustrative purposes is between wall component  200 R and roof portion  400   a , with roof bottom plate  255  positioned along the lower face of roof portion  400   a  adjacent second longitudinal roof edge  416 , and wall end cap  246  positioned on the top edge of wall component  200 R. In structure  150 , wall component  200 R in  FIG. 13  is vertically oriented and roof portion  400   a  is horizontally oriented. 
     The design of roof bottom plate  255  shown in  FIG. 13  is substantially the same as floor top plate  252  shown in  FIG. 15 , except that roof bottom plate  255  is thinner because it need not accommodate the thickness of any flooring; for example, roof bottom plate  255  can have a thickness “I”, equal to the thickness of an abutting protective layer  218 , such as MgO board. Roof bottom plate  255  in  FIG. 13  is a rigid elongate member that has an elongate seal plate  223  with an elongate planar interior face  226  and an opposing elongate planar exterior face  227 . The exterior face  227  preferably is hard and smooth to provide a good sealing surface. Seal plate  223  of roof bottom plate  255  has a length the same, or substantially the same, as the length of second longitudinal roof edge  416 , so as to cover the bottom edge of roof portion  400   a  proximate to second longitudinal roof edge  416 . Seal plate  223  of roof bottom plate  255  has a width the same, or substantially the same, as the width of wall component  200 R. 
     As shown in  FIG. 13 , at the exterior edge of the interior face  226  of roof bottom plate  255 , proximate to second longitudinal roof edge  416 , there is provided a series of elongate stepped locating ridges  254 . These stepped locating ridges, which have a length the same, or substantially the same, as the length of roof bottom plate  255 , mesh with the corresponding stepped locating ridges  253  of wall end cap  221  depicted in  FIG. 10  and with dashed lines in  FIG. 13 , and positioned at the exterior edge of roof portion  400   a.    
     Still referring to  FIG. 13 , at the mid-point of the exterior face  227  of seal plate  223  of roof bottom plate  255  there is provided an elongate interlock slot  228 , which has a rectangular cross-section and a length the same, or substantially the same, as the length of roof bottom plate  255 . There are two elongate seal slots  240  defined on the exterior face  227  of roof bottom plate  255 , one on each side of interlock slot  228 , as shown in  FIG. 13 . Each seal slot  240  has a length the same, or substantially the same, as the length of roof bottom plate  255 . 
     Roof bottom plate  255  can be secured to the bottom face of roof portion  400   a  shown in  FIG. 13  for example by adhesive applied to interior face  226 , or by fasteners, such as screw or nail fasteners, spaced apart along the length of roof bottom plate  255  and driven through the exterior face  227 , or by utilizing a combination of adhesive and fasteners. 
       FIG. 13  additionally depicts a wall end cap  246  positioned along the top edge of wall component  200 R. The design of wall end cap  246  was previously described in connection with  FIG. 12 . The seal plate  223  of wall end cap  246  shown in  FIG. 13  has a length and width the same, or substantially the same, as the length and width of the top edge of wall component  200 R, so as to cover the entirety, or substantially the entirety, of the top edge of wall component  200 R. Wall end cap  246  can be fastened to that top edge for example by adhesive applied to its interior face  226 , or by fasteners, such as screw or nail fasteners, spaced apart along the length of wall end cap  246  and driven through its exterior face  227 , or by utilizing a combination of adhesive and fasteners. 
     In  FIG. 13 , roof bottom plate  255  mates with wall end cap  246 . For this purpose, the interlock key  247  of wall end cap  246  is provided with a length the same, or substantially the same, as the length of roof bottom plate  255 . That interlock key  247  mates with the interlock slot  228  of roof bottom plate  255  when roof bottom plate  255  and wall end cap  246  are pressed together, with the elongate coupling ridges  248  of wall end cap  246  mating with elongate coupling insets  249  of roof bottom plate  255 . Coupling ridges  248  and coupling insets  249  can be the same, or approximately the same, as the lengths of wall end cap  246  and roof bottom plate  255  respectively. 
     Prior to mating wall end cap  246  and roof bottom plate  255 , a compression seal  230  is placed in each of the two seal slots  240  of roof bottom plate  255 , with each seal  230  having the same, or approximately the same, length as the slot  240  in which it is inserted. When roof bottom plate  255  and wall end cap  246  are pressed together in a mating relationship, the two compression seals  230  are deformed in the manner described previously to provide four lines of sealing between roof bottom plate  255  and wall end cap  246 . 
     H. Shear Seal ( 260 ) 
     A number of the enclosure component sealing systems described herein and utilized in structure  150  include a shear seal system. An element of that shear seal system is a shear seal  260 . 
     Shear seal  260 , which is shown in cross-section in  FIG. 16A , is an elongate member having a planar elongate base  231  flanked by two elongate winglets  233 . At the intersection of base  231  and each of the winglets  233 , there is provided two opposed elongate seal walls  234  (individually referred to as seal walls  234 A,  234 B), joined to and extending away from base  231  in a diverging relationship at a divergence angle λ where λ&lt;180°, for example λ&lt;90° or in the range of 40°&lt;λ&lt;50°. It is most preferred that λ be the same, or nearly so, as the divergence angle c of the slot walls  244  shown in  FIG. 11B . Thus as shown in  FIG. 16A , the ends of the seal walls  234  distal from base  231  are further apart than the ends of the seal walls  234  proximate to base  231 . 
     At the end of seal wall  234 B distal from base  231 , seal wall  234 B is joined to an elongate seal closure  237 , a planar surface oriented at an upward angle α (relative to the planar orientation of base  231 ) away from seal wall  234 B in a direction toward an elongate seal support  239 , described below, with α&lt;90°. A planar cantilevered seal surface  257  is joined to the edge of seal closure  237  that is distal from seal wall  234 B, as shown in  FIG. 16A . 
     At the end of seal wall  234 A distal from base  231 , seal wall  234 A is joined to the elongate seal support  239 . Proximate to seal wall  234 A, seal support  239  comprises an elongate planar region oriented parallel to base  231 . Distal from seal wall  234 A, seal support  239  comprises an elongate arcuate buttress region. The edge of the arcuate buttress region of seal support  239 , which is distal from seal wall  234 A, joins cantilevered seal surface  257  proximate to the junction of cantilevered seal surface  257  and seal closure  237  to define a hollow seal chamber  238 . Planar cantilevered seal surface  257  is oriented at an upward angle β away from the junction of arcuate buttress  235  and seal closure  237  and terminates at a free end  258 , with β&lt;90°, for example β&gt;α. 
     Shear seal  260  is intended to be received in an elongate seal slot  240 , shown for example in  FIG. 16B , which has the same geometry as the seal slots  40  utilized to receive compression seals  230 . Shear seal  260  is dimensioned to snugly fit within slot  240 , such that winglets  233  of seal  260  are received in grooves  242  of slot  240 . An exemplary placement of a shear seal  260  is depicted in  FIG. 16B , which shows a shear seal  260  placed within the slot  240  of a wall end interlock A  262 , described further below. As can be seen, when shear seal  260  is properly positioned in slot  240 , both seal wall  234 A and seal wall  234 B terminate below the level of exterior face  227  of wall end interlock A  262 , with seal wall  234 A (underlying planar cantilevered seal surface  257 ) terminating below the level at which seal wall  234 B terminates. 
     Shear seal  260  is preferably utilized where two enclosure components  155  are laterally moved during unfolding, one over the other. In such an instance, the two enclosure components  155  are provided with paired enclosure component sealing structures, with one enclosure component sealing structure mounted on one of the enclosure components  155  (such as on an exterior edge), and the other enclosure component sealing structure mounted on the other of the enclosure component structures  155  (such as on an interior face). Each of the paired enclosure component sealing structures has a shear seal  260 , with the two shear seals  260  being oppositely oriented; that is to say, the cantilevered seal surface  257  of each is oriented away from the cantilevered seal surface  257  of the other, and each is oriented in the direction of relative movement. Thus in the case of each of the two shear seals  260 , the lateral movement of one enclosure component  155 , relative to the other, is in the direction from seal wall  234 B toward seal wall  234 A. This lateral movement flattens the cantilevered seal surface  257 , as well as the seal closure  237 , and squeezes down each shear seal  260 , such that its seal closure  237  and seal support  239  are urged into seal chamber  238 . This permits the opposing planar exterior faces  227  of each of the two enclosure component sealing structures to come into full contact. At the same time, the cantilevered seal surface  257  and seal closure  237  of each shear seal  260  are urged into a generally coplanar relationship, with the planar exterior face  227  of the opposing enclosure component seal structure pressing against them, to create an elongate area of sealing. 
     Shear seal  260  can be fabricated from a resilient material, such as rubber or plastic, for example polyurethane. Particular embodiments of enclosure component sealing structures utilizing the foregoing compression sealing system are described below. 
     I. Wall End Interlock A ( 262 ), Floor Top Interlock ( 261 ) Sealing System 
       FIG. 17  depicts in exploded form the junction between a floor top interlock  261  and a wall end interlock A  262 , each shown in cross-section. The particular junction is shown for illustrative purposes between wall portion  200   s - 2  and floor portion  300   b , with floor top interlock  261  positioned along the upper face of floor portion  300   b  adjacent first transverse floor edge  120 , and with wall end interlock A  262  positioned on the bottom edge of wall portion  200   s - 2 . In structure  150 , wall portion  200   s - 2  in  FIG. 17  is vertically oriented and floor portion  300   b  is horizontally oriented. 
     In particular, floor top interlock  261  shown in  FIG. 17  is a rigid elongate member that has an elongate seal plate  223  with an interior face  226  and an opposing planar exterior face  227 . The exterior face  227  preferably is hard and smooth to provide a good sealing surface. Seal plate  223  has a length the same, or substantially the same, as the dimension of floor portion  300   b  coinciding with first transverse floor edge  120 , so as to cover the top edge of floor portion  300   b  proximate to first transverse floor edge  120 . Seal plate  223  of floor top interlock  261  has a width the same, or substantially the same, as the width of wall portion  200   s - 2 . The floor top interlock  261  preferably has a thickness “J” at its interior edge, as shown in  FIG. 17 , sufficient to accommodate the thickness of any protective layer  218  and/or flooring used to surface floor portion  300   b , such as stone, wood or carpeting. 
     As shown in  FIG. 17 , at the exterior edge of the interior face  226  of floor top interlock  261 , adjacent first transverse floor edge  120 , there is provided a series of elongate stepped locating ridges  254 . These stepped locating ridges  254 , which have a length the same, or substantially the same, as the length of floor top interlock  261 , mesh with the corresponding stepped locating ridges  253 . shown on the wall end cap  221  depicted in  FIG. 10 . Such a wall end cap  221  is located at the exterior edge of wall portion  300   b , as indicated in  FIG. 17  by dashed lines. 
     Still referring to  FIG. 17 , an elongate seal slot  240  is defined on the exterior face  227  of floor top interlock  261 , proximate to the exterior edge of floor portion  300   b  (such exterior edge coincides with first transverse floor edge  120 ). Seal slot  240  has a length the same, or substantially the same, as the length of floor top interlock  261 . 
     Floor top interlock  261  can be secured to the top edge of floor portion  300   b  at first transverse floor edge  120  shown in  FIG. 17  for example by adhesive applied to interior face  226 , or by fasteners, such as screw or nail fasteners, spaced apart along the length of floor top interlock  261  and driven through the exterior face  227 , or by utilizing a combination of adhesive and fasteners. 
     Wall end interlock A  262 , also shown in  FIG. 17 , is a rigid elongate member that has an elongate seal plate  223  with an interior face  226  and an opposing exterior face  227 . The exterior face  227  preferably is hard and smooth to provide a good sealing surface. The seal plate  223  of wall end interlock A  262  has a length and width the same, or substantially the same, as the length and width of the bottom edge of wall portion  200   s - 2 , so as to cover the entirety, or substantially the entirety, of the bottom edge of wall portion  200   s - 2 , as shown in in  FIG. 17 . 
     At the mid-point of the interior face  226  of seal plate  223  of wall end interlock A  262 , there is provided an elongate key  222 , which has a rectangular cross section and a length the same, or substantially the same, as the length of wall end interlock A  262 . Key  222  is received in a corresponding elongate slot formed in the exterior edge reinforcement positioned on the bottom edge of the wall portion  200   s - 2  to which wall end interlock A  262  is secured. 
     Again referring to  FIG. 17 , an elongate seal slot  240  is defined on the exterior face  227  of wall end interlock A  262 , toward the interior edge of wall end interlock A  262  (distal from first transverse floor edge  120 ). This seal slot  240  has a length the same, or substantially the same, as the length of wall end interlock A  262 . Additionally, each of the interior and exterior edges of wall end interlock A  262  define locating slots  229 . In the case where the enclosure component  155 , in this case wall portion  200   s - 2 , utilizes the enclosure component laminate design shown in  FIG. 7 , locating slots  229  receive the edge portions of sheet metal layers  205  and  216 , bent down at a ninety degree (90°) angle. 
     Wall end interlock A  262  can be fastened to the bottom edge of wall portion  200   s - 2  for example by adhesive applied to its interior face  226 , or by fasteners, such as screw or nail fasteners, spaced apart along the length of wall end interlock A  262  and driven through its exterior face  227 , or by utilizing a combination of adhesive and fasteners. 
     In  FIG. 17 , floor top interlock  261  mates with wall end interlock A  262 . Prior to mating, a shear seal  260  is placed in the seal slot  240  of floor top interlock  261 , and a shear seal  260  is placed in the seal slot  240  of wall end interlock A  262 . The shear seals  260  placed in the seals slots  240  of floor top interlock  261  and wall end interlock A  262  each has the same, or approximately the same, length as the slot  240  in which it is inserted. 
     Mating of floor top interlock  261  with wall end interlock A  262  occurs by the bottom edge of wall portion  200   s - 2  moving over the top surface of floor portion  300   b , from a folded position to an unfolded position. Thus in the arrangement shown in  FIG. 17 , such mating will correspond to a movement of wall portion  200   s - 2  from the right-hand side of the figure toward the left, with wall end interlock A  262  sliding over floor top interlock  261  until the fully unfolded position is reached. In that fully unfolded position, the shear seal  260  in floor top interlock  261 , and particularly its seal surface  257 , will be in pressing contact with the exterior face  227  of wall end interlock A  262 ; and the shear seal  260  in wall end interlock A  262 , and particularly its seal surface  257 , will be in pressing contact with the exterior face  227  of floor top interlock  261 . Consistent with this movement, the shear seal  260  placed in seal slot  240  of floor top interlock  261  is preferably oriented so that the free end  258  of its cantilevered seal surface  257  is directed toward the exterior edge of floor top interlock  261  (toward first transverse floor edge  120 ), and the shear seal  260  placed in the seal slot  240  of wall end interlock A  262  is preferably oriented so that the free end  258  of its cantilevered seal surface  257  is directed toward the interior edge of wall end interlock A  262  (away from first transverse floor edge  120 ). 
     To facilitate mating, it is preferred that planar exterior face  227  of floor top interlock  261  not be parallel to the interior face  226  of floor top interlock  261 , or to the top face of wall portion  300   b , but rather be inclined downward, in the direction moving away from first transverse floor edge  120  at an angle γ, as shown in  FIG. 17 . Likewise, it is preferred that planar exterior face  227  of wall end interlock A  262  be inclined upward, in the direction moving toward first transverse floor edge  120 , at the same angle γ, as shown in  FIG. 17 . Accordingly, when bottom edge of wall portion  200   s - 2  moves over the top surface of floor portion  300   b , from a folded position to an unfolded position, the shear seals  260  located in slots  240  of floor top interlock  261  and wall end interlock A  262  will be compressed by the sliding movement of wall end interlock A  262  to provide two elongate sealing areas between floor portion  300   b  and wall portion  200   s - 2 . Also to facilitate mating, there is shown in  FIG. 17  a step-down  268  on the exterior face  227  of wall end interlock A  262 . Step-down  268  is an abrupt reduction in the thickness of wall end interlock A  262 , in the direction moving from the inside edge of wall end interlock A  262  toward the outside edge of wall end interlock A  262 , which outside edge in the case of the junction depicted in  FIG. 17  is proximate first transverse floor edge  120  when wall portion  200   s - 2  is in the fully unfolded position. Step-down  268  is located between the slot  240  and the outside edge of wall end interlock A  262 . There is also shown in  FIG. 17  a corresponding step-up  269  on the exterior face  227  of floor top interlock  261 . Step-up  269  is an abrupt increase in the thickness of floor top interlock  261 , in the direction moving from the inside edge of floor top interlock  261  toward the outside edge of floor top interlock  261 , which outside edge in the case of the junction depicted in  FIG. 17  is proximate first transverse floor edge  120  when floor portion  300   b  is in the fully unfolded position. Step-up  269  is located between the slot  240  and the inside edge of floor top interlock  261  (distal from first transverse floor edge  120 ). Step-down  268  and step-up  269  are appropriately located to act as a “stop” and insure correct alignment of wall end interlock A  262  with floor top interlock  261  as wall end interlock A  262  slides over floor top interlock  261 . 
     J. Wall End Interlock B ( 263 ), Wall End Interlock A ( 262 ) Sealing System 
       FIG. 18  depicts in exploded form the junction between a wall end interlock B  263  and a wall end interlock A  262 , each shown in cross-section. The particular junction is shown for illustrative purposes between wall portion  200   s - 2  and wall component  200 P, with wall end interlock B  263  positioned on the interior edge of wall component  200 P proximate first transverse edge  108  and wall end interlock A  262  positioned on the vertical edge of wall portion  200   s - 2  proximate first longitudinal edge  106 . In structure  150 , wall portion  200   s - 2  depicted in  FIG. 18  is vertically oriented and wall component  200 P is vertically oriented. 
     In particular, wall end interlock B  263  in  FIG. 18  is an elongate member that has an elongate seal plate  223  with an elongate interior face  226  and an opposing elongate planar exterior face  227 . The exterior face  227  preferably is hard and smooth to provide a good sealing surface. Seal plate  223  has a length the same, or substantially the same, as the height of wall component  200 P when unfolded, so as to cover the interior edge of wall component  200 P proximate to first transverse edge  108 . Seal plate  223  of wall end interlock B  263  has a width the same, or substantially the same, as the width of wall portion  200   s - 2 . In general terms, the design of wall end interlock B  263  is substantially the same as floor top interlock  261  depicted in  FIG. 17 , except wall end interlock B  263  is thinner because it need not accommodate any flooring; for example, wall end interlock B  263  can have a thickness “I” (not shown in  FIG. 18 ) at its interior edge equal to the thickness of an abutting protective layer  218 , such as MgO board. 
     Still referring to  FIG. 18 , an elongate seal slot  240  is defined on the exterior face  227  of wall end interlock B  263 , proximate the interior edge of wall component  200 P positioned adjacent to first longitudinal edge  106 . Seal slot  240  has a length the same, or substantially the same, as the length of wall end interlock B  263 . 
     Wall end interlock B  263  can be secured to the interior edge of wall component  200 P as shown in  FIG. 18  for example by adhesive applied to interior face  226 , or by fasteners, such as screw or nail fasteners, spaced apart along the length of wall end interlock B  263  and driven through the exterior face  227 , or by utilizing a combination of adhesive and fasteners. 
       FIG. 18  additionally shows a wall end interlock A  262  positioned along the depicted vertical edge of wall portion  200   s - 2 . The design of wall end interlock A  262  was previously disclosed in connection with  FIG. 17 . The seal plate  223  of the wall end interlock A  262  shown in  FIG. 18  has a length and width the same, or substantially the same, as the length and width of the depicted vertical edge of wall portion  200   s - 2 , so as to cover the entirety, or substantially the entirety, of that vertical edge of wall portion  200   s - 2 , as shown in in  FIG. 18 . The elongate rectangular key  222  of wall end interlock A  262  shown in  FIG. 18  has a length the same, or substantially the same, as the length of that wall end interlock A  262 . Key  222  is received in a corresponding elongate slot formed in the exterior edge reinforcement positioned on the vertical edge of the wall portion  200   s - 2  to which wall end interlock A  262  is secured. The seal slot  240  of wall end interlock A  262  shown in  FIG. 18  has a length the same, or substantially the same, as the length of that wall end interlock A  262 . In the case where the enclosure component  155 , in this case wall portion  200   s - 2 , utilizes the enclosure component laminate design shown in  FIG. 7 , the locating slots  229  of wall end interlock A  262  shown in  FIG. 18  receive the edge portions of sheet metal layers  205  and  216 , bent down at a ninety degree (90°) angle. 
     Wall end interlock A  262  can be secured to the vertical edge of wall portion  200   s - 2  shown in  FIG. 18  for example by adhesive applied to its interior face  226 , or by fasteners, such as screw or nail fasteners, spaced apart along the length of wall end interlock A  262  and driven through its exterior face  227 , or by utilizing a combination of adhesive and fasteners. 
     In  FIG. 18 , wall end interlock A  262  mates with a wall end interlock B  263 . Prior to mating, a shear seal  260  is placed in the seal slot  240  of wall end interlock A  262 , and a shear seal  260  is placed in the seal slot  240  of wall end interlock B  263 . Each of the shear seals  260  placed in the seals slots  240  of wall end interlock A  262  and a wall end interlock B  263  has the same, or approximately the same, length as the slot  240  in which it is inserted. 
     Mating of wall end interlock A  262  and a wall end interlock B  263  occurs by the vertical edge of wall portion  200   s - 2  depicted in  FIG. 18  swinging toward and across the interior surface of wall component  200 P, as wall portion  200   s - 2  moves from a folded position to an unfolded position. Thus in the arrangement shown in  FIG. 18 , such mating will correspond to a movement of wall portion  200   s - 2  from the top of the figure toward the bottom, with wall end interlock A  262  sliding across wall end interlock B  263  until the fully unfolded position is reached. In that fully unfolded position, the shear seal  260  in wall end interlock A  262 , and particularly its seal surface  257 , will be in pressing contact with the exterior face  227  of wall end interlock B  263 ; and the shear seal  260  in wall end interlock B  263 , and particularly its seal surface  257 , will be in pressing contact with the exterior face  227  of wall end interlock A  262 . Consistent with this movement, the shear seal  260  placed in seal slot  240  of floor top interlock B  263  is preferably oriented so that the free end  258  of its cantilevered seal surface  257  is directed toward the exterior edge of wall end interlock B  263  (toward first transverse edge  108 ), and the shear seal  260  placed in the seal slot  240  of wall end interlock A  262  is preferably oriented so that the free end  258  of its cantilevered seal surface  257  is directed toward the interior edge of wall end interlock A  262  (away from first transverse edge  108 ). 
     To facilitate mating, it is preferred that planar exterior face  227  of wall end interlock B  263  not be parallel to the interior face  226  of wall end interlock B or to the interior face of wall component  200 P, but rather be inclined at an angle γ, as shown in  FIG. 17 , so that seal plate  223  of wall end interlock B  263  becomes progressively thinner moving away from first transverse edge  108 . Likewise, it is preferred that planar exterior face  227  of wall end interlock A  262  be inclined at the same angle γ, as shown in  FIG. 17 , so that seal plate  223  of wall end interlock A  262  becomes progressively thicker moving away from first transverse edge  108 . Accordingly, when vertical edge of wall portion  200   s - 2  swings toward and across the interior surface of wall component  200 P, from a folded position to an unfolded position, the shear seals  260  located in slots  240  of floor end interlock A  262  and wall end interlock B  263  will be compressed by the sliding movement of wall end interlock A  262  to provide two elongate sealing areas between wall component  200 P and wall portion  200   s - 2 . Also to facilitate mating, as previously described a step-down  268  is provided on the exterior face  227  of wall end interlock A  262 . Step-down  268  is an abrupt reduction in the thickness of wall end interlock A  262 , in the direction moving from the inside edge of wall end interlock A  262  toward the outside edge of wall end interlock A  262 , which outside edge in the case of the junction depicted in  FIG. 18  is proximate first transverse edge  108  when wall portion  200   s - 2  is in the fully unfolded position. Step-down  268  is positioned between the slot  240  and the outside edge of wall end interlock A  262  (proximate transverse edge  108 ), as depicted in  FIG. 18 . Also as depicted in  FIG. 18 , a corresponding step-up  269  is provided on the exterior face  227  of wall end interlock B  263 . Step-up  269  is an abrupt increase in thickness of wall end interlock B  263 , in the direction moving from the inside edge of wall end interlock B  263  toward the outside edge of wall end interlock B  263 , which outside edge in the case of the junction depicted in  FIG. 18  is proximate first transverse edge  108 . Step-up  269  is positioned between the slot  240  and the inside edge of wall end interlock B  263  (distal from first transverse edge  108 ). Step-down  268  and step-up  269  are appropriately located to act as a “stop” and insure correct alignment of wall end interlock A  262  with wall end interlock B  263  as wall end interlock A  262  slides across wall end interlock B  263 . 
     K. Closure Boards 
     The two closure boards of these inventions, namely perimeter board  310  and roof skirt board  280 , are described below. 
     Perimeter Board ( 310 ). The exterior edges of floor component  300 , or portions thereof, are optionally provided with a perimeter board  310 . 
       FIG. 19A  depicts in cross section an exemplary positioning of perimeter board  310 . In particular, perimeter board  310  is designed to be positioned against an I-beam end cap  221 , in this instance the I-beam end cap  221  located on an exterior edge of floor portion  300   a . Perimeter board  310  includes an elongate seal plate  223  with an interior face  226  and an opposing exterior face  227 . Perimeter board  310  has such length as is desired, such as to span the entirety of the exterior edge of floor portion  300   a . As shown in  FIG. 19A , the width of perimeter board  310  can be sufficient to capture the thickness of the floor component  300   a , or floor portion thereof against which it is positioned, plus a portion of the abutting wall component  200  or wall component portion. 
     The interior face  226  of perimeter board  310  includes an elongate locating key  264 , which is rectangular in cross section and dimensioned to be received in accessory slot  224  of I-beam end cap  221 . Locating key  264  can be the same length as the perimeter board  310 , or can comprise space apart discrete segments. The interior face  226  of perimeter board  310  in  FIG. 19A  also includes a plurality of elongate clearance slots  266 , rectangular in cross section in the embodiment shown, and having a length the same as, or substantially the same as, the length of perimeter board  310 . Clearance slots  266  are preferably located so as to be positioned over locating grooves  225  of I-beam end cap  221  when locating key  264  is received in accessory slot  224 . When so located, clearance slots  266  provide space for fastener heads driven into locating grooves  225  of I-beam end cap  221  so that perimeter board  310  can be snugly positioned against I-beam end cap  221 . 
     The exterior face  227  of perimeter board  310  depicted in  FIG. 19A  includes two elongate fastener slots  265 , each of which has a dovetail shape in cross section in the embodiment shown, and a length the same as, or substantially the same as, the length of perimeter board  310 . A locating groove  225  is provided in each fastener slot  265 , so as to facilitate the accurate positioning of nails or other fasteners utilized to secure perimeter board  310  to abutting components. 
       FIG. 19B  depicts in cross section the positioning of I-beam end cap  221 , floor top plate  252 , wall end cap  246  and perimeter board  310  relative to each other at a junction between wall component  200 R and floor portion  300   a . As can be seen, perimeter board  310  masks this junction from external view to achieve a more attractive appearance, as well as providing an additional barrier against the ingress of soil, dust, rain and the like. A resilient strip  267 , such as those shown in  FIG. 19B , can be snapped into each of the fastener slots  265  to cover any nail or fastener heads exposed in those slots. 
     Roof Skirt Board. The exterior edges of roof component  400 , or portions thereof, are optionally provided with a roof skirt board  280 . 
       FIG. 20  depicts in cross section an exemplary positioning of roof skirt board  280 . In particular, roof skirt board  280  is designed to be positioned against an I-beam end cap  221 , in this instance the I-beam end cap  221  located on an exterior edge of roof portion  400   a . Roof skirt board  280  includes an elongate seal plate  223  with an interior face  226  and an opposing exterior face  227 . Roof skirt board  280  has such length as is desired, such as to span the entirety of the exterior edge of roof portion  400   a . As shown in  FIG. 20 , the width of roof skirt board  280  can be sufficient to capture the thickness of the roof component  400 , or portion thereof against which it is positioned, plus a portion of the abutting wall component  200  or wall portion. 
     The interior face  226  of roof skirt board  280  includes an elongate cinch key  278 , which is preferably serpentine in cross section and dimensioned to be received in accessory slot  224  of I-beam end cap  221 . Cinch key  278  can be the same length as the perimeter board  310 , or can comprise space apart discrete segments. In turn, the exterior face  227  of roof skirt board  280  includes an elongate fastener slot  265  positioned over cinch key  278 . Fastener slot  265  has a dovetail shape in cross section in the embodiment shown, and a length the same as, or substantially the same as, the length of roof skirt board  280 . An elongate locating groove  225  is provided in the fastener slot  265  of roof skirt board  280 , and provides a visual indication of where to place fasteners during construction. 
     Roof skirt board  280  facilitates the securing of roofing material, such as thermoplastic polyolefin membrane, to wall components  200 . After fully unfolding the roof portions, such roofing material is optionally used to cover the top of roof component  400 . The roofing material extending beyond roof component  400  is then folded down to extend between exterior face  227  of I-beam end cap  221  of roof portion  400   a  shown in  FIG. 20  and interior face  226  of roof skirt board  280 . After the roofing material is so positioned, nails or other fasteners are driven at spaced intervals along locating groove  225 , to press roof skirt board  280  against the roofing material and secure the roofing material in place between roof skirt board  280  and I-beam end cap  221 . Cinch key  278 , if provided with a serpentine or like cross section, provides additional area, so as to better capture the roofing material. An elongate resilient strip  267 , such as the one shown in  FIG. 20 , can be snapped into fastener slot  265  to cover any nail or fastener heads exposed in this slot. 
     Enclosure Component Sealing Structure Materials 
     The enclosure component sealing structures described herein can be fabricated from a number of materials, such as wood, aluminum, plastics and the like. It is preferred to fabricate the enclosure component sealing structures from foamed polyvinyl chloride (PVC), particularly Celuka foamed PVC. This material provides a strong, impact and crack-resistant lightweight material with a hard attractive exterior, which, in addition to contributing a sealing function, additionally contributes to the structural rigidity of the enclosure components  155 . 
     Enclosure Component Sealing Structure Exemplary Placements 
     The exploded views in  FIGS. 21A and 21B  of structure  150  depicted in  FIG. 1  provide exemplary placements of the enclosure component sealing structures described herein. For illustrative purposes to better understand some of these exemplary placements, certain of the enclosure component sealing structures shown in  FIGS. 21A and 21B  are shown slightly separated from the enclosure component  155  to which they are fastened. 
     Referring to  FIG. 21A , I-beam end caps  221  can be utilized to seal the horizontal exterior edges of floor portion  300   a  (three placements), floor portion  300   b  (three placements), roof portion  300   a  (three placements), roof portion  300   b  (two placements) and roof portion  300   c  (three placements). Further, as shown in  FIG. 21B  and in detail in  FIG. 12 , the hinged junction between wall portion  200   s - 1  and  200   s - 2  can be sealed by positioning a wall end cap  246  on the vertical edge of wall portion  200   s - 1  and a wall vertical interlock  245  on the vertical edge of wall portion  200   s - 2 . Likewise, the hinged vertical junction between wall portion  200   s - 3  and  200   s - 4  can be sealed as shown in  FIG. 21B  by positioning a wall end cap  246  on the hinged vertical edge of wall portion  200   s - 3  and a wall vertical interlock  245  on the hinged vertical edge of wall portion  200   s - 4 . 
     In addition, as shown in  FIGS. 21A and 21B , and in detail in  FIG. 13 , the horizontal junction between wall component  200 R and roof portion  400   a  can be sealed by positioning a roof bottom plate  255  on the bottom face of roof portion  400   a  overlying wall component  200 R and by positioning a wall end cap  246  on the horizontal edge of wall component  200 R, which supports roof portion  400   a . A like seal arrangement can be used to seal the horizontal junctions between roof portions  400   a ,  400   b  and  400   c , and wall portions  200   s - 1  through  200   s - 4  (unfolded roof portion  400   b  will rest on unfolded wall portion  200   s - 2  and also on a section of wall portion  200   s - 1 , as can be appreciated from  FIG. 3 ), as well as to seal the horizontal junction between roof portion  400   c  and wall component  200 P. The two vertical exterior edges of wall component  200 R can each be sealed by positioning on each of them a wall end cap  246 . 
     In a comparable manner, as shown in  FIGS. 21A, 21B  and in detail in  FIG. 15 , the horizontal junction between wall component  200 R and floor portion  300   a  can be sealed by positioning a wall end cap  246  on the horizontal edge of wall component  200 R resting on floor portion  300   a  and by positioning on the top face of floor portion  300   a  underlying wall component  200 R a floor top plate  252 . A like seal arrangement can be used to seal the horizontal junctions between floor portion  300   b  and wall component  200 P, and between floor portion  300   a  and wall portions  200   s - 1  and  200   s - 3 , up to the point where wall portion  200   s - 1  meets wall portion  200   s - 2 , and up to the point where wall portion  200   s - 3  meets wall portion  200   s - 4 . The two vertical exterior edges of wall component  200 P can be sealed by positioning on each of them a wall end cap  246 . 
     Furthermore, the hinged horizontal junction between roof portion  400   b  and roof portion  400   c , as shown in  FIG. 21A  and in detail in  FIG. 14 , can be sealed by positioning an I-beam interlock A  250  on interior edge  412   c  of roof portion  400   c , and an I-beam interlock B  251  on first interior edge  412   b  of roof portion  400   b . Similarly, the hinged horizontal junction between roof portion  400   a  and roof portion  400   b  shown in  FIG. 21A  can be sealed by positioning an I-beam interlock A  250  on second interior edge  412   b  of roof portion  400   b , and an I-beam interlock B  251  on interior edge  412   a  of roof portion  400   a . In like manner, the hinged horizontal junction between floor portion  300   a  and floor portion  300   b  can be sealed by positioning an I-beam interlock A  250  on the interior edge  301   b  of floor portion  300   b  and an I-beam interlock B  251  on the interior edge  301   a  of floor portion  300   a.    
     Referring now to  FIGS. 21A, 21B  and in detail to  FIG. 17 , the horizontal junction between wall portion  200   s - 2  and floor portions  300   a  and  300   b  can be sealed by positioning a wall end interlock A  262  on the bottom edge of wall portion  200   s - 2  and a floor top interlock  261  on the regions of the upper face of floor portions  300   a  and  300   b  underlying wall portion  200   s - 2  when wall portion  200   s - 2  is in its fully unfolded position. The horizontal junction between wall portion  200   s - 4  and floor portions  300   a  and  300   b  when wall portion  200   s - 4  in its fully unfolded position can be sealed similarly. 
     Finally, referring to  FIG. 21B  and in detail to  FIG. 18 , the vertical junction between wall portion  200   s - 2  and wall component  200 P can be sealed by positioning a wall end interlock A  262  on the vertical edge of wall portion  200   s - 2  that is adjacent to wall component  200 P when both wall portion  200   s - 2  and wall component  200 P are in their fully unfolded positons, and by positioning a wall end interlock B  263  on the region of the interior face of wall component  200 P that is adjacent wall portion  200   s - 2  when both wall portion  200   s - 2  and wall component  200 P are in their fully unfolded positions. The vertical junction between wall portion  200   s - 4  and wall component  200 P can be sealed in like manner. 
     Enclosure Component Manufacture 
     For enclosure components  155  utilizing the multi-layered, laminate design 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 ¶¶ 00187-00205 and 00212 and in FIGS. 8, 9A-9C, 23A-23J and 24A-24B thereof. 
     A facility suitable for the manufacture of enclosure components  155 , 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 inventions 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 ¶¶ 00178-00186 and 00206-00222, and in FIGS. 22, 23A-23J and 24A-24B. 
     Enclosure Component Relationships and Assembly for Transport 
     For ease of transport and maximum design flexibility, it is preferred that there be a specific dimensional relationship among enclosure components  155 . 
       FIG. 2  shows a top schematic view of 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 8 E long and 8 E wide; notably, the entire structure  150 , including perimeter boards  310 , preferably is bounded by this 8 E by 8 E 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 by 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 8 E long, and each of roof portions  400   a  and  400   b  is approximately 8 E long and 2.5 E wide. Roof portion  400   c  is approximately 8 E long and 2.9 E 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 3 E wide and floor component  300   b  is just under 5 E 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 , fourth wall portion  200   s - 4  is folded inward and positioned generally against fixed space portion  102 , and second wall portion  200   s - 2  is folded inward and positioned generally against fourth wall portion  200   s - 4  (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 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 of all 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. An interior design for fixed space portion  102  is described in U.S. Nonprovisional application Ser. No. 17/587,051, entitled “Wall Component Appurtenances,” filed on Jan. 28, 2022 and having the same inventors as this disclosure. The contents of that U.S. Nonprovisional patent application Ser. No. 17/587,051, entitled “Wall Component Appurtenances,” filed on Jan. 28, 2022 and having the same inventors as this disclosure are incorporated by reference as if fully set forth herein, particularly including the interior design details for fixed space portion  102  described for example at ¶¶ 0082-85 and depicted in FIGS. 11A-11C thereof. Carrying out the foregoing steps prior to shipment permits the builder, in effect, to erect a largely finished structure  150  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  100  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 paragraphs 0020-0035 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. 
     The movement of shipping module  100  is facilitated by the presence of fork tubes  360   a ,  360   b  in floor portion  300   a . For example, a shipping module can be moved from factory to a transport means using an appropriately-sized forklift, with the forks of the forklift being inserted into fork tubes  360   a ,  360   b . As another example, straps pending from a reach stacker or a ship-to-shore crane, typically used to move intermodal containers, can be passed by ground personnel through fork tubes  360   a ,  360   b  and then appropriately secured, to permit movement of the shipping module  100 . Addition of perimeter board  310  can be deferred until after shipping module  100  is delivered to its desired location. Alternatively, perimeter board  310  can be provided with cut-outs so as to permit straps or forks to have access to fork tubes  360   a ,  360   b , which cut-outs optionally can be covered and/or filled once access to fork tubes  360   a ,  360   b  is no longer needed. 
     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 ¶¶ 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. 
     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 ¶¶ 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 . Perimeter board  312  and roof skirt board  280  provide structures for securing wall, floor and roof components in their deployed positions. In addition, certain appurtenances can be fitted to wall components  200  to facilitate fastening them to floor component  300 , as well as to improve the interior appearance and speed fabrication. Further details regarding these appurtenances are described in U.S. Nonprovisional patent application Ser. No. 17/587,051, entitled “Wall Component Appurtenances,” filed on Jan. 28, 2022 and having the same inventors as this disclosure. The contents of that U.S. Nonprovisional patent application Ser. No. 17/587,051, entitled “Wall Component Appurtenances,” filed on Jan. 28, 2022 and having the same inventors as this disclosure are incorporated by reference as if fully set forth herein, particularly including the first and second appurtenance designs described for example at ¶¶ 0047-61 and depicted in FIGS. 8A-10C thereof. 
     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. 
     Building Configuration Options 
     Any number of structures  150  can be positioned together at the desired site, to yield a multitude of different structural configurations. Interior staircases for such multi-story structures can be provided during manufacture in fixed space portion  102 , together with insertion of an appropriate access aperture in roof component  400 , or can be added after erection. Likewise, a pitched roof and other architectural additions can be delivered separately from shipping module  100  or fabricated on-site, and positioned onto roof component  400  of structure  150 . 
     For example, two or more structures  150  can be erected so that a wall component  200  of one structure is placed adjacent a wall component  200  of the other structure. The builder can then cut apertures in those juxtaposed regions to connect the two structures, either in the factory or on-site, in accordance with the marketer&#39;s or purchaser&#39;s choices. As one example,  FIG. 22  depicts the floor plan of three structures  150 , namely  150   a ,  150   b  and  150   c , arranged side-by-side to yield one housing unit with three rooms. In such a case, the perimeter boards  310  of the adjoining structures  150  can abut each other, thereby providing a space between the adjoining structures  150  through which utility lines can be passed. 
     Structures  150  can also be stacked, one on top of the other, to create multi-story structures.  FIG. 23  depicts a structure  150   e  positioned on top of a structure  150   d  to yield a two story structure. Thus as shown in  FIG. 23 , there is provided a garage aperture  203  in addition to door aperture  202  on the first level, as well as a door aperture  202  (not visible) on the second level, which is accessed via exterior stairway  201 . 
     In the case of stacking structures  150 , such as structure  150   e  shown in  FIG. 23  stacked on top of structure  150   d , spacer plates  404  can be used to separate the floor component  300  of the structure  150   e  from the roof component  400  of the structure  150   d .  FIG. 24  shows an embodiment of a spacer plate  404 , which comprises a planar base  402  having an interior face  407 , an opposed exterior face  401  (not visible in  FIG. 24 ), and a thickness. There is a lip  403  extending away from the interior face  407  of base  402  in a perpendicular direction. The edge  421  of lip  403  distal from interior face  407  is provided with a set of stepped locating ridges  253 . The geometry of these ridges  253  is such as to be able to mesh with the corresponding stepped locating ridges  253  shown of I-beam end cap  221 . 
     In use, spacer plates  404  can be provided on the bottom surface of the floor component  300  of the upper structure  150  (structure  150   e  in  FIG. 23 ), positioned along the first and second longitudinal floor edges  117  and  119 , and along the first and second transverse floor edges  120  and  118 . Spacer plates  404  can also be provided on the top surface of the roof component  400  of the lower structure  150  (structure  150   d  in  FIG. 23 ), positioned along the first and second longitudinal roof edges  406  and  416 , and along the first transverse and second transverse roof edges  408  and  410 . 
     The spacer plates  404  associated with the upper structure  150  can be positioned to overlie the spacer plates  404  associated with the lower structure  150 . When the spacer plates  404  are employed in such a manner, the spacer plates  404  associated with the upper structure  150  support the weight and loads of the upper structure  150 , and transfer that weight and loads to lower structure  150  through the spacer plates  404  associated with lower structure  150 . As shown in  FIG. 25 , the locating ridges  253  on spacer plates  404  engage the corresponding locating ridges  253  on the I-beam end caps  221  of floor component  300  (shown for floor portion  300   a ) and roof component  400  (shown for roof portion  400   a ). 
     Although depicted at having a relative square shape in  FIG. 24 , spacer plate  404  can be made elongate, or can be provided with a length the same, or substantially the same, as the length of the roof or floor edges at which they are positioned, as preferred. Where the length of spacer plate  404  is less than the length of the roof or floor edges at which they are positioned, a plurality of spacer plates can be provided in segments along those edges, again in accordance with preference. Such spacer plates  404  provide an air barrier between the levels of the multi-story structure. Spacer plates  404  can be made for example from acrylonitrile butadiene styrene plastic or extruded polyvinyl chloride plastic. 
     As necessary, means can be utilized to secure stacked structures  150  each to the other, such as by use of steel reinforcing plates fastened at spaced-apart locations to join an overlying floor component  300  to an underlying roof component  400 . 
     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 folded building structure transportable to a desired site at which the building structure is to be erected, comprising: 
     (a) a fixed space portion including a planar rectangular first floor portion having first and second longitudinal floor edges, first and second transverse floor edges and a thickness, the first floor portion comprising across the thickness (i) a first structural layer having a first face and an opposing second face; (ii) a foam panel layer having a first face and an opposing second face, the first face of the foam panel layer being bonded to the opposing second face of the first structural layer; (iii) a second structural layer having a first face and an opposing second face, the first face of the second structural layer being bonded to the opposing second face of the foam panel layer; and (iv) a first edge reinforcement proximate the first longitudinal floor edge, and a second edge reinforcement proximate the second longitudinal floor edge;
 
(b) the first floor portion having between the first structural layer and the second structural layer (i) a first fork tube oriented in a transverse direction and spanning the distance from the first longitudinal floor edge to the second longitudinal floor edge so as to define a first aperture in the first longitudinal floor edge and a second aperture in the second longitudinal floor edge, (ii) a planar elongate longitudinally-oriented first fork tube plate secured to the first edge reinforcement and to the first fork tube; and (iv) a planar elongate longitudinally-oriented second fork tube plate secured to the second edge reinforcement and to the first fork tube.
 
     Clause 2. The folded building structure of clause 1, wherein the first floor portion additionally has between the first structural layer and the second structural layer (ii) a second fork tube oriented in a transverse direction, spaced apart from the first fork tube and spanning the distance from the first longitudinal floor edge to the second longitudinal floor edge so as to define a third aperture in the first longitudinal floor edge and a fourth aperture in the second longitudinal floor edge, (ii) a planar elongate longitudinally-oriented third fork tube plate secured to the first edge reinforcement and to the second fork tube; and (iv) a planar elongate longitudinally-oriented fourth fork tube plate secured to the second edge reinforcement and to the first fork tube. 
     Clause 3. The folded building structure of clause 2, wherein the first fork tube plate extends beyond the first fork tube along the first edge reinforcement in a direction away from the second fork tube, and the third fork tube plate extends beyond the second fork tube along the first edge reinforcement in an opposite direction away from the first fork tube. 
     Clause 4. The folded building structure of clause 2, wherein the second fork tube plate extends beyond the first fork tube along the second edge reinforcement in a direction away from the second fork tube, and the fourth fork tube plate extends beyond the second fork tube along the second edge reinforcement in an opposite direction away from the first fork tube. 
     Clause 5. The folded building structure of any one of clause 1, 2, 3 or 4, wherein the first structural layer of the floor portion is a metal sheet layer. 
     Clause 6. The folded building structure of any one of clause 2, 3, 4 or 5, wherein the first and second fork tubes are rectangular in cross section. 
     Clause 7. The folded building structure of any one of clause 2, 3, 4, 5 or 6, wherein the first and second fork tubes are in contact with the first structural layer. 
     Clause 8. The folded building structure of any one of clauses 1-7, further comprising: 
     (d) a planar rectangular second floor portion having third and fourth longitudinal floor edges, third and fourth transverse floor edges and a thickness, the second floor portion having a laminate construction comprising across the thickness (i) a first structural layer having a first face and an opposing second face; (ii) a foam panel layer having a first face and an opposing second face, the first face of the foam panel layer being bonded to the opposing second face of the first structural layer; and (iii) a second structural layer having a first face and an opposing second face, the first face of the second structural layer being bonded to the opposing second face of the foam panel layer; and
 
(f) means for pivotally connecting floor portion to the second floor portion to permit the second floor portion to angularly rotate, about a horizontal axis proximate the second and third longitudinal floor edges, from a second floor portion folded position angularly oriented relative to the first floor portion to a second floor portion unfolded position coplanar with the first floor portion.
 
     Clause 9. A folded building structure transportable to a desired site at which the building structure is to be erected, comprising: 
     (a) a fixed space portion including a planar rectangular first floor portion having first and second longitudinal floor edges, first and second transverse floor edges and a thickness, the first floor portion having a laminate construction comprising across the thickness (i) a first structural layer having a first face and an opposing second face; (ii) a foam panel layer having a first face and an opposing second face, the first face of the foam panel layer being bonded to the opposing second face of the first structural layer; (iii) a second structural layer having a first face and an opposing second face, the first face of the second structural layer being bonded to the opposing second face of the foam panel layer; (iv) a first edge reinforcement proximate the first longitudinal floor edge, and a second edge reinforcement proximate the second longitudinal floor edge;
 
(b) a first beam reinforcing the laminate construction and oriented in a transverse direction, with a first end positioned proximate the first longitudinal floor edge and a second end positioned proximate the second longitudinal floor edge;
 
(c) the first floor portion having between the first structural layer and the second structural layer (i) a first fork tube oriented in the transverse direction and spaced-apart to a first side of the first beam, the first fork tube spanning the distance from the first longitudinal edge to the second longitudinal edge so as to define a first aperture in the first longitudinal floor edge and a second aperture in the second longitudinal floor edge, (ii) a planar elongate longitudinally-oriented first fork tube plate positioned against and secured to the first edge reinforcement and to the first fork tube, and having a longitudinal length spanning the distance between the first fork tube and the first beam; and (iv) a planar elongate longitudinally-oriented second fork tube plate positioned against and secured to the second edge reinforcement and to the first fork tube, and having a longitudinal length spanning the distance between the first fork tube and the first beam.
 
     Clause 10. The folded building structure of clause 9, wherein the first floor portion additionally has between the first structural layer and the second structural layer (ii) a second fork tube oriented in a transverse direction, and spaced-apart to a second side of the first beam opposite the first side, the second fork tube spanning the distance from the first longitudinal edge to the second longitudinal edge so as to define a third aperture in the first longitudinal floor edge and a fourth aperture in the second longitudinal floor edge, (ii) a planar elongate longitudinally-oriented third fork tube plate secured to the first edge reinforcement and to the second fork tube, and having a longitudinal length spanning the distance between the second fork tube and the first beam; and (iv) a planar elongate longitudinally-oriented fourth fork tube plate secured to the second edge reinforcement and to the first fork tube, and having a longitudinal length spanning the distance between the second fork tube and the first beam. 
     Clause 11. The folded building structure of clause 10, wherein the first fork tube plate extends beyond the first fork tube along the first edge reinforcement in a direction away from the first beam, and the third fork tube plate extends beyond the second fork tube along the first edge reinforcement in an opposite direction away from the first beam. 
     Clause 12. The folded building structure of either of clause 10 or clause 11, wherein the second fork tube plate extends beyond the first fork tube along the second edge reinforcement in a direction away from the first beam, and the fourth fork tube plate extends beyond the second fork tube along the second edge reinforcement in an opposite direction away from the first beam. 
     Clause 13. The folded building structure of any one of clause 9, 10, 11 or 12, wherein the first structural layer of the floor portion is a metal sheet layer. 
     Clause 14. The folded building structure of any one of clause 10, 11, 12 or 13, wherein the first and second fork tubes are rectangular in cross section. 
     Clause 15. The folded building structure of clause 14, wherein the first and second fork tubes are in contact with the first structural layer. 
     Clause 16. The folded building structure of any one of clause 9, 10, 11, 12, 13 or 14, further comprising: 
     (d) a planar rectangular second floor portion having third and fourth longitudinal floor edges, third and fourth transverse floor edges and a thickness, the second floor portion having a laminate construction comprising across the thickness (i) a first structural layer having a first face and an opposing second face; (ii) a foam panel layer having a first face and an opposing second face, the first face of the foam panel layer being bonded to the opposing second face of the first structural layer; and (iii) a second structural layer having a first face and an opposing second face, the first face of the second structural layer being bonded to the opposing second face of the foam panel layer;
 
(e) a second beam reinforcing the laminate construction of the second floor portion and oriented in a transverse direction, with a third end positioned proximate the third longitudinal floor edge and a fourth end positioned proximate the fourth longitudinal floor edge; and
 
(f) the third end of the second beam pivotally connected to the second end of the first beam to permit the second floor portion to angularly rotate, about a horizontal axis proximate the second and third longitudinal floor edges, from a second floor portion folded position angularly oriented relative to the first floor portion to a second floor portion unfolded position coplanar with the first floor portion.
 
     Clause 17. The folded building structure of any one of clauses 2-4, 6-7 and 10-16, wherein the second fork tube is a metal. 
     Clause 18. The folded building structure of any one of clauses 2-4, 6-7 and 10-17, wherein each of the third and fourth fork tube plates is a metal. 
     Clause 19. The folded building structure of any one of clauses 1-18, wherein the first fork tube is a metal. 
     Clause 20. The folded building structure of any one of clauses 1-19, wherein each of the first and second fork tube plates is a metal. 
     Clause 21. The folded building structure of any one of clause 17, 18, 19 and 20, wherein the metal is steel. 
     Clause 22. The folded building structure of any one of clauses 1-21, wherein each of the first and second edge reinforcements is laminated strand lumber board.