Patent Publication Number: US-2007107321-A1

Title: Expandable shelter system

Description:
CROSS-REFERENCE TO RELATED U.S. APPLICATIONS  
      This Application is a Continuation of co-pending application Ser. No. 11/223,813 filed Sep. 9, 2005; said application being assigned to Gichner Systems Group, LLC and incorporated herein by reference as if fully set forth herein. 
    
    
     BACKGROUND OF INVENTION  
      1. Field of Invention  
      The present invention is directed to improvements in expandable shelter systems which can house diverse kinds of equipment (e.g. electronics, medical instruments, etc) for transport on conventional cargo systems and carrier vehicles to remote locations for rapid deployment.  
      2. Brief Description of the State of Knowledge in the Art  
      Expandable ISO shelters for containing preconfigured electronic systems (e.g. command, control and communications C3 systems), as well as providing mobile field hospitals (i.e. medical treatment centers) are well known in the art.  
      Examples of such expandable shelter systems are disclosed in U.S. Pat. No. 5,815,988 to Molina; U.S. Pat. No. 5,658,032 to Gardner; U.S. Pat. No. 5,586,802 to Dewald, Jr. et al.; U.S. Pat. No. 4,546,578 to Behrmann; U.S. Pat. No. 4,854,094 to Clark; U.S. Pat. No. 4,603,518 to Fennes; and U.S. Pat. No. 3,107,116 to Meaker.  
      Examples of commercially available expandable shelters are offered by M. Schall GmbH &amp; Co. KG, Germany, under the following product designation: Schall-Container-Systems Expandable SCS [1:2/1:3] for mobile command post applications, constructed according to ISO Standard or as a rolling-off container according to DIN 14505.  
      As described in its product brochures, the central part of the Expandable SCS is made of insulated and galvanized steel construction, and the expandable boxes are made from an insulated sandwich construction, with aluminum fittings. The heavy-weight version of the Expandable SCS is 9-times stackable, whereas the lightweight version of the unit is 4-times stackable. During its operating/deployment condition, the floors of the Expandable SCS are on the same level. The Expandable SCS is designed for various rapid and long-term applications, for operation on a carrier vehicle or on the ground. The expandable sections of the Expandable SCS are designed as closed boxes for an optimal overpressure tightness of the complete system. Due to its modular construction, the containers of the Expandable SCS can be adapted to the required application at hand and provided with doors, service cut outs, partition walls, etc. as required.  
      While the Expandable SCS offers many features, it does suffer from a number of shortcomings and drawbacks.  
      In particular, the expandable sections of the Expandable SCS are realized as self-contained boxes with rigid flooring structures that nest within the central or main section of the Expandable SCS. In the single side expandable version of the SCS, the expandable box nests within the central section of the Expandable SCS. In the double side expandable version of the Expandable SCS, the expandable boxes nest within each other, and this sub-combination of boxes then nets within the central section of the Expandable SCS. Due to this prior art design, the Expandable SCS during its deployment/operating mode or condition, requires that the expandable boxes are automatically lowered to the same floor level as the central part (i.e. with no steps) using a leveling support system, which adds complexity and cost to the system design, and also provides an additional point of failure.  
      Furthermore, this prior art box nesting design of the expandable sections of the Expandable SCS prevents permanent mounting of equipment on the floor of the central section of the SCS during its transport mode. Consequently, equipment designated for installation on the floor of the central section of the Expandable SCS during the deployment mode, must be stored elsewhere within the central section of the Expandable SCS and then redeployed to the floor of the central station after the expandable section(s) have been moved to the deployment positions.  
      Another consequence of the prior art design employed by the Expandable SCS is that the expandable sections cannot be made to be substantially the same volume of the central section of the shelter system, maximizing on the expandability in volume of prior art shelter systems. This results in a non-optimal use of interior space with the expandable shelter system, and requires movement of (typically sensitive) equipment with the shelter system after deployment in the field, which is highly undesirable in demanding applications such as mobile C3 applications, and mobile field hospital applications.  
      Thus there is a great need in the art for an improved expandable shelter system that is free from the shortcomings and drawbacks of prior art shelter system designs.  
     SUMMARY AND OBJECTS OF THE PRESENT INVENTION  
      Accordingly, it is a primary object of the present invention to provide an improved expandable shelter system which is free from the many shortcomings and drawbacks associated with prior art expandable shelter systems.  
      Another object of the present invention is to provide an expandable shelter system that provides for rapid deployment and expansion in diverse environments.  
      Another object of the present invention is to provide such an expandable single-side expandable shelter system which provides the added floor space needed for Command, Control and Communications (C3) systems requiring extensive rack-mounted information servers, signal processing equipment, data storage devices, and the like.  
      Another object of the present invention is to provide such an expandable shelter system which, when its single side expandable section is expanded, provides almost 25 square meters of operational floor space.  
      Another object of the present invention is to provide such an expandable shelter system which when closed, meets the dimensional requirements of ISO 668 and ANSI MH5.4 allowing for transport using all common intermodal transport methods.  
      Another object of the present invention is to provide such an expandable shelter system which due to its unique design, can be easily modified to permit over pressurization for NBC protection for the enclosed system and personnel.  
      Another object of the present invention is to provide such an expandable shelter system, wherein a single expandable side section nests inside a main 20-foot ISO shelter section during transport.  
      Another object of the present invention is to provide such an expandable shelter system, wherein equipment can be permanently mounted on the floor of the central section of the expandable shelter system.  
      Another object of the present invention is to provide such an expandable shelter system, wherein the floor panel of the single expandable side section is hinged longitudinally, allowing the floor section to fold in half when the shelter is closed for transport, thereby providing for temporary or permanent mounting of heavy equipment to the floor of the main shelter section.  
      Another object of the present invention is to provide such an expandable shelter system, wherein the flush floor design allows easy relocation of equipment into the expandable section for operation.  
      Another object of the present invention is to provide such an expandable shelter system, wherein its unique folding floor design allows for permanent mounting of equipment on the upper half of the walls of the expandable side section, thereby reducing the need to move that equipment after deployment.  
      Another object of the present invention is to provide an expandable shelter system, wherein electronic equipment may be permanently mounted to the upper half of the expandable side section&#39;s three walls, thereby allowing for permanent interconnection of this equipment.  
      Another object of the present invention is to provide a double-side expandable shelter system which, when both of its expandable side sections are expanded, provides almost 35.4 square meters of operational floor space.  
      Another object of the present invention is to provide such an expandable shelter system which when closed, meets the dimensional requirements of ISO 668 and ANSI MH5.4 allowing for transport using all common intermodal transport methods.  
      Another object of the present invention is to provide such an expandable shelter system which due to its unique design, can be easily modified to permit over pressurization for NBC protection for the enclosed system and personnel.  
      Another object of the present invention is to provide such an expandable shelter system, wherein its set of double expandable side sections nest inside a main 20-foot ISO shelter section during transport.  
      Another object of the present invention is to provide such an expandable shelter system, wherein the floor panel of each expandable side section is hinged longitudinally, allowing the floor section to fold in half when the shelter is closed for transport, thereby providing for temporary or permanent mounting of heavy equipment to the floor of the main ISO shelter section.  
      Another object of the present invention is to provide such an expandable shelter system, wherein the flush floor design allows easy relocation of equipment into the expandable section for operation.  
      Another object of the present invention is to provide such an expandable shelter system, wherein its unique folding floor design, in each expandable side section, allows for permanent mounting of equipment on the upper half of the walls of the expandable side section, thereby reducing the need to move that equipment after deployment.  
      Another object of the present invention is to provide an expandable shelter system, wherein electronic equipment may be permanently mounted to the upper half of the expandable side section&#39;s three walls, thereby allowing for permanent interconnection of this equipment.  
      Another object of the present invention is to provide an expandable shelter system, wherein lighting, power distribution, and signal distribution apparatus can be permanently installed in both the main section and the expandable side section of the shelter system.  
      Another object of the present invention is to provide an expandable shelter system, wherein due to its modular design, custom configurations including different length expandable sections can be manufactured to suit specific system needs.  
      Another object of the present invention is to provide an expandable shelter system, wherein interior partitions can be installed within the shelter system to create a separate externally accessible equipment room, if desired.  
      Another object of the present invention is to provide an expandable shelter system, wherein the weight of a single-side expandable shelter system is less than 2364 Kg (5200 pounds), and wherein the weight of its payload can be at least 6727 Kg (14,800 pounds).  
      Another object of the present invention is to provide an expandable shelter system, wherein the floor load, at the center section of the shelter system can be at least 522 Kg/m 2  uniform load over the entire floor (107 pounds/ft 2 ).  
      Another object of the present invention is to provide an expandable shelter system, wherein its payload on the expandable section can be at least 910 Kg (2000 pounds).  
      Another object of the present invention is to provide an expandable shelter system, wherein the roof load at the center section can be at least 366 Kg/M 2  uniform load over the entire roof (75 pounds /ft 2 ).  
      Another object of the present invention is to provide an expandable shelter system, wherein the roof load at the expandable section can be at least 195 Kg/M 2  uniform load over the entire roof (40 pounds /ft 2 ).  
      Another object of the present invention is to provide an expandable shelter system, which can withstand temperature extremes during operational modes in the range of −54° C. to 52° C. (−65° F. to 125° F.), and during non-operational modes in the range of −62° C. to 71° C. (−80° F. to 160° F.).  
      Another object of the present invention is to provide an expandable shelter system, wherein M8 Rivnuts® installed in members of its center section, can withstand wall attachment loading of at least 910 Kg (2000 pounds) tensile loads.  
      Another object of the present invention is to provide an expandable shelter system, wherein potted Inserts installed anywhere within the expandable side section can withstand at least 455 Kg (1000 pounds) tensile loads.  
      Another object of the present invention is to provide an expandable shelter system, which can be docked together to form larger functional units.  
      Another object of the present invention is to provide an expandable shelter system, wherein double gaskets provided at all seams provide water-tightness for protection against wind-driven rain.  
      Another object of the present invention is to provide an expandable shelter system, wherein full-length replaceable skids are provided on the underside of the main section of the expandable shelter system.  
      Another object of the present invention is to provide an expandable shelter system, wherein an environmental control unit (e.g. air conditioning unit) may be mounted on the main section of the expandable shelter system to condition air therewithin during is deployment mode.  
      Another object of the present invention is to provide an expandable shelter system, wherein gas impervious seals are provided at each and every joint to prevent dangerous gases and other microbial agents from entering the interior of the expandable shelter system.  
      Another object of the present invention is to provide an expandable shelter system, which is EMC/EMP protected.  
      Another object of the present invention is to provide an electronic command, control and communications (C3) center that is housed within an ISO-style expandable shelter system having the features and functionalities described above.  
      These and other objects of the present invention will become more apparently understood hereinafter and in the Claims to Invention appended hereto. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
      For a more complete understanding of how to practice the Objects of the Present Invention, the following Detailed Description of the Illustrative Embodiments should be read in conjunction with the accompanying Drawings, briefly described below, wherein:  
       FIG. 1  is a first perspective view of the single-side expandable shelter system of the present invention arranged in its transport mode/configuration without interior equipment mounted therein, and showing its expandable section nested inside the main shelter section and its end door arranged in closed configuration during transport;  
       FIG. 2  is a second perspective view of the single-side expandable shelter system of the present invention arranged in its transport configuration without interior equipment mounted therein, and showing both its side and end doors arranged in its closed configuration during transport;  
       FIG. 3  is a third perspective view of the single-side expandable shelter system of the present invention arranged in its transport configuration without interior, equipment mounting therein, showing a replaceable fill-length skid structure affixed to the bottom of the main shelter section and the end door of the shelter system arranged in its closed configuration;  
       FIG. 4A  is a first side view of the exterior of the single-side expandable shelter system of the present invention arranged in its transport configuration without interior equipment mounted therein, and showing the side door of the shelter system arranged in its closed configuration;  
       FIG. 4B  is a second side view of the exterior of the single-side expandable shelter system of the present invention arranged in its transport configuration without interior equipment mounted therein, and showing the expandable side of the shelter system arranged in its closed configuration;  
       FIG. 5  is an end view of the single-side expandable shelter system of the present invention arranged in its transport configuration without interior equipment mounted therein;  
       FIG. 6  is a sectional view of the single-side expandable shelter system of the present invention arranged in its transport configuration without interior equipment mounted therein, taken along line A-A of  FIG. 4B , showing the floor panels of the expandable section arranged in a folded configuration so as to take up minimal space within the interior of the shelter system;  
       FIG. 7  is a second end view of the exterior of the single-side expandable shelter system of the present invention arranged in its transport configuration without interior equipment mounted therein, and showing it end door closed;  
       FIG. 8  is a sectional view of the single-side expandable shelter system of the present invention arranged in its transport configuration without interior equipment mounted therein, taken along line B-B of  FIG. 7 , and showing the interior of the side door of the shelter system;  
       FIG. 9  is a sectional view of the single-side expandable shelter system of the present invention arranged in its transport configuration without interior equipment mounted therein, taken along line C-C of  FIG. 7 , and showing the interior of the shelter system along that view;  
       FIG. 10  is an elevated side view of the single-side expandable shelter system of the present invention arranged in its transport configuration without interior equipment mounted therein, showing the side wall panel of expandable section of the shelter system, while still nested within the main shelter section;  
       FIG. 11A  is a first sectional view of the single-side expandable shelter system of the present invention arranged in the first phase of its deployment configuration without interior equipment mounted therein, taken along line A-A of  FIG. 4B , showing that side wall section has been lowered down in a horizontal orientation, but the floor panels of the expandable section are still arranged in a folded configuration, in a substantially vertical direction;  
       FIG. 11B  is a second sectional view of the single-side expandable shelter system of the present invention arranged in a first phase of its deployment configuration without interior equipment mounted therein, taken along line D-D of  FIG. 4B , showing that side wall section has been lowered down in a horizontal orientation, but the floor panels of the expandable section are still arranged in a folded configuration, in a substantially vertical direction;  
       FIG. 12  is a first sectional view of the single-side expandable shelter system of the present invention arranged in a second phase of its deployment configuration without interior equipment mounted therein, showing that side wall section has started outward to its deployable position, and the floor panels of the expandable section are unfolded as the expandable shelter section is pulled out from the main shelter section of the shelter system;  
       FIG. 13  is a second sectional view of the single-side expandable shelter system of the present invention arranged in a third phase of its deployment configuration without interior equipment mounted therein, taken along line D-D of  FIG. 4B , showing that side wall section advanced further outward to its deployable position, and the floor panels of the expandable section being further unfolded as the expandable shelter section is pulled farther out from the main shelter section of shelter system;  
       FIG. 14  is a first sectional view of the single-side expandable shelter system of the present invention arranged in a fourth and final phase of its deployment configuration (i.e. full deployment configuration) without interior equipment mounted therein, taken along line D-D of  FIG. 4B , showing that side wall section has been fully extended outward to its deployed position, and the floor panels of the expandable section have been further completely unfolded upon the expandable shelter section being pulled maximally out from the main shelter section of shelter system;  
      FIGS.  15 A 1 ,  15 A 2  and  15 B are elevated and end views of the horizontal support members used in the side expandable section translation mechanism used in the shelter system of the present invention;  
       FIGS. 16A and 16B  show elevated views of the diagonal support members used in the side expandable section support mechanisms.  
       FIG. 17A  is a first perspective view of the single-side expandable shelter system of the present invention arranged in its full deployment configuration without any interior equipment mounted therein, showing its side door arranged in a closed configuration;  
       FIG. 17B  is a second perspective view of the single-side expandable shelter system of the present invention arranged in its full deployment configuration without any interior equipment mounted therein, showing the full-length replaceable skid structure affixed to the bottom of the main shelter section and bottom of the expandable side section lying substantially within the same plane as the bottom floor of the main shelter section;  
       FIG. 17C  is a third perspective view of the single-side expandable shelter system of the present invention arranged in its full deployment configuration without any interior equipment mounted therein, showing that the expanded side section has substantially the same volumetric dimensions as the main shelter section of the shelter system;  
       FIG. 18  is an elevated end view of the single-side expandable shelter system of the present invention arranged in its full deployment configuration without any interior equipment mounted therein, showing that the expanded side section has substantially the same (i.e. side dimensions) as the main shelter section of the shelter system;  
       FIG. 19  is a floor plan section view of the single-side expandable shelter system of the present invention arranged in its full deployment configuration without any interior equipment mounted therein, showing that the expanded side section has substantially the same floor dimensions as the main shelter section of the shelter system;  
       FIG. 20A  is first sectional view of the single-side expandable shelter system of the present invention arranged in the first phase of its deployment configuration loaded with a full set of interior equipment and cabinet structures mounted therein, taken along line A-A of  FIG. 4B , showing that the expanded side section supports multiple cabinet structures on the upper wall surfaces, below the vertical height of the folded flooring sections, compactly stored away in a substantially vertical direction, while the flooring structure of the main shelter section supports multiple cabinet structures, in accordance with a predetermined configuration of equipment and cabinet structures within the shelter system;  
       FIG. 20B  is second sectional view of the single-side expandable shelter system of the present invention arranged in the first phase of its deployment configuration loaded with a full set of interior equipment and cabinet structures mounted therein, taken along line D-D of  FIG. 4B , showing that the expanded side section supports multiple cabinet structures on the upper wall surfaces, below the vertical height of the folded flooring sections, compactly stored away in a substantially vertical direction, while the flooring structure of the main shelter section supports multiple cabinet structures, in accordance with a predetermined configuration of equipment and cabinet structures within the shelter system;  
       FIG. 21  is a sectional plan view of the single-side expandable shelter system of the present invention arranged in the first phase of its deployment configuration loaded with a full set of interior equipment and cabinet structures mounted therein, showing the location of multiple cabinet structures mounted on the upper wall surfaces of the expandable side section, and the multiple cabinet structures supported on the floor surface of the main shelter section of the shelter system;  
       FIG. 22  is sectional view of the single-side expandable shelter system of the present invention arranged in its full deployment configuration loaded with a full set of interior equipment and cabinet structures mounted therein, showing that the expanded side section supports multiple cabinet structures on the upper wall surfaces, while the flooring structure of the main shelter section supports interior equipment mounted therein;  
       FIG. 23  is a sectional plan view of the single-side expandable shelter system of the present invention arranged in its full deployment configuration loaded with a full set of interior equipment and cabinet structures mounted therein, showing the location of multiple cabinet structures mounted on the upper wall surfaces of the expandable side section, and the interior equipment mounted on the floor surface of the main section of the shelter system;  
       FIG. 24  is a sectional view of the single-side expandable shelter system of the present invention arranged in its deployed configuration loaded with a full set of interior equipment and cabinet structures mounted therein, taken along line C-C of  FIG. 7 , showing the location of multiple cabinet structures mounted on the upper wall surfaces of the expandable side section;  
       FIG. 25  is a perspective view of the double-side expandable shelter system of the present invention arranged in its transport configuration/mode, without interior equipment mounted therein, and showing both of its double expandable sections nested inside the main shelter section;  
       FIG. 26  is a side view of the exterior of the double-side expandable shelter system of  FIG. 25 , arranged in its transport configuration without interior equipment mounted therein, and showing the expandable side with the door of the shelter system arranged in its closed configuration;  
       FIG. 27  is a second side view of the exterior of the double-side expandable shelter system of  FIG. 25 , arranged in its transport configuration without interior equipment mounted therein, and showing the other expandable side of the shelter system;  
       FIG. 28  is an end view of the exterior of the double-side expandable shelter system of  FIG. 25 , arranged in its transport configuration without interior equipment mounted therein, showing the end door of the shelter system arranged in its closed configuration;  
       FIG. 29  is a sectional view of the double-side expandable shelter system of the present invention arranged in its transport configuration without interior equipment mounted therein, taken along line A-A of  FIG. 27  and showing both hinged floor panels folded up and substantially vertically arranged against the side and rear panels of the shelter system while the first and second expandable sections are nested within the main section of the shelter system;  
       FIG. 30A  is a first perspective view of the double-side expandable shelter system of the present invention arranged in its deployment configuration/mode, without interior equipment mounted therein, and showing both of its expandable sections fully projected out from within the interior volume of the main shelter section;  
       FIG. 30B  is a second perspective view of the double-side expandable shelter system of the present invention arranged in its deployment configuration/mode, without interior equipment mounted therein, and showing both of its double expandable sections fully projected out from within the interior volume of the main shelter section;  
       FIG. 31  is a sectional view of the double-side expandable shelter system of the present invention arranged in its full deployment mode/configuration without interior equipment mounted therein, taken along line A-A of  FIG. 27  and showing both the hinged floor panels substantially horizontally extended within a horizontal plane of the shelter system while the first and second expandable sections are fully extended out of the main section of the shelter system;  
       FIG. 32  is an end view of the double-side expandable shelter system of the present invention arranged in its full deployment mode/configuration without interior equipment mounted therein, and showing both the hinged floor panels substantially horizontally extended within a horizontal plane of the shelter system while the first and second expandable sections are fully extended out of the main section of the shelter system;  
       FIG. 33  is a second end view of the double-side expandable shelter system of the present invention arranged in its full deployment mode/configuration without interior equipment mounted therein, and showing both the hinged floor panels substantially horizontally extended within a horizontal plane of the shelter system while the first and second expandable sections are fully extended out of the main section of the shelter system;  
       FIG. 34  is a plan view of the double-side expandable shelter system of the present invention arranged in its full deployment mode/configuration without interior equipment mounted therein, and showing both the first and second expandable sections being fully extended out of the main section of the shelter system, providing a 3:1 expansion in volume of the main shelter section when the system is configured in its deployment mode;  
       FIG. 35  is a perspective view of the double-side expandable shelter system of the present invention arranged in its full deployment mode/configuration, while supported on a mobile carrier vehicle; and  
       FIG. 36  is a perspective view of a plurality of double-side expandable shelter systems of the present invention docked together to form a larger functioning unit for use in diverse field applications. 
    
    
     DETAILED DESCRIPTION OF THE ILLUSTRATIVE EMBODIMENTS OF THE PRESENT INVENTION  
      Referring to the figures in the accompanying Drawings, the various illustrative embodiments of the expandable shelter system of the present invention will be described in great detail, wherein like elements will be indicated using like reference numerals.  
      In  FIGS. 1 through 24 , a single-side expandable shelter system according to the principles of the present invention is shown in great detail. Also, in  FIGS. 25 through 34 , a double-side expandable shelter system of the present invention is illustrated in great detail. In general, the expandable shelter system of the present invention has two distinct modes of configuration, namely: a transport mode in which the side expandable section(s) are completely nested within an (ISO-style) main or central shelter section; and a deployment (i.e. operating) mode or configuration in which the side expandable section are completely protracted from the main section.  
      In each of these embodiments of the present invention, the flooring structure of the side expandable section(s) is realized as a hinged flooring panel assembly consisting of at least two floor panels hinged together so that they can be stacked compactly in a vertically elongated direction when the corresponding side expandable section is retracted within the main/central shelter section of the expandable shelter system, in a nested manner, as to be completly contained therewithin its transport mode/configuration.  
      Several important benefits follow from this particular technical feature of the present invention, namely: equipment can be now permanently mounted on the flooring structure of the central/main section of the shelter system; each expanding section of the expandable shelter system can now have an interior volume that is substantially the same as the interior volume of the central shelter section, thereby maximizing the total utilizable volume of the expandable shelter system in its deployment mode; electronic equipment can be permanently mounted to the upper half of the three walls of each expandable side section thereby allowing for permanent interconnection of this equipment; and complex floor leveling subsystem are completely eliminated, thereby reducing cost, complexity and points of failure in the expandable shelter system design of the present invention. These and other benefits of the present invention will become apparent as the various illustrative embodiments are described in the greater detail below.  
      In  FIGS. 1 and 10 , the single-side expandable shelter system of the present invention, 1 constructed in accordance with ISO standards, is shown arranged in its transport mode/configuration from different views, with its expandable section  2  nested inside the main shelter section  3  and its end door  4  arranged in its closed configuration during transport. As shown, the single-side expandable shelter system  1  comprises: main shelter section  3  having (i) a flooring structure  5 , beneath which a replaceable full-length skid structure  6  is affixed thereto, (ii) a top panel  7 , a front panel  8  with a front door having open and closed configurations, and (iii) first and end side panels  10  and  11 , interconnected within a framework constructed from frame members  12 A through  12 H, in a conventional manner in accordance with ISO standards, so as to form a five-sided box-like container with an open side along its length dimension; (2) a single five sided expandable section  2  having a side wall panel  13 , a top panel  14 , and first and second end panels  15  and  16 , and a foldable flooring assembly including first and second flooring sections  17 A and  17 B that hinged together at point  18  and with the bottom of the front wall panel  19  and the edge of the flooring structure  20  of the main shelter section; and (3) a side expandable section support mechanism  21  including, in the illustrative embodiment, (a) a pair of horizontally-oriented and telescopically-constructed expansion section support members  22 A and  22 B which (i) are installed within elongated slots formed in the bottom exterior of the main shelter section, telescopically extend as the side-expandable section is extended away from the main shelter section, and having distal ends which are supported by a pair of diagonally-extending telescopically-constructed members  23 A and  23 B connected to the top portion of the main shelter section and the distal portion of telescopically-constructed horizontally-extending support members  22 A and  22 B, respectively.  
      In the preferred embodiment, telescopically-constructed members  23 A and  23 B are realized using high-strength tubes having a rectangular cross-section nested within each other, extendable along their coaxial axes, and capable of supporting the load of the extendable side section of the shelter system. Similarly, diagonally-extending support members  23 A and  23 B are preferably realized using high-strength tubes having a rectangular or circular cross-section, nested within each other, extendable along their coaxial axes, and capable of supporting the load of the extendable side section of the shelter system.  
      During deployment, the horizontal telescopically-constructed side section support members  22 A and  22 B, and diagonal telescopically-constructed support members  23 A and  23 B, support the side expandable section when it is being projected out from within the interior volume of the main shelter section.  
      Optionally, a motor can be fixedly mounted to the side panel  13  of the side expansion section  2 , and provided with gears that ride along guide tracks formed on telescopically-constructed support member  22 A or  22 B, and (i) pull the side expandable section out from the interior volume of the main section when the shelter system is being configured into its deployment mode, and (ii) push the side expandable section into from the interior volume of the main section, during the transport mode, as shown in  FIGS. 11A through 14 . The motor can be realized as a hand-operated winch device operated by manually turning a crank mechanism, or by a electric motor. In either case, the side expandable section support mechanism  21  can be modified as such to provide such automated or semi-automated transport of the side section into and out of the main shelter section during transitions between transport and deployment modes of operation.  
      In  FIGS. 11 through 14 , the shelter system is shown being reconfigured from its transport mode into its deployment/operating mode. During this configuration process, the side expandable section support mechanism  21  is pulled down into its operating configuration with horizontal support members  22 A,  22 B resting slightly above the ground surface. During this process, the vertically-oriented foldable flooring assembly  17 A,  17 B unfolds and assumes its horizontal position, while being supported along its outer edges by support flanges provided along the perimeter of end wall panels  15  and  16  and side wall panel  13  of the side section  2  during the final phase of the deployment mode of configuration. After the side section  2  is slid out from the main shelter section  3 , and the horizontal and diagonal telescopic support members are telescopically extended, these support members support the side section  2  during deployment.  
      In  FIGS. 15 through 19 , the expandable shelter system is shown from various views while its configured in its deployment mode. For purposes of illustration, all figure drawings sets forth in  FIGS. 1 through 19  are shown without any interior equipment mounted within the expandable shelter system in order to help illustrate the construction of the system, and illustrate the simplicity and elegance of this inventive design.  
      In  FIGS. 20A through 24 , equipment of various kind (e.g. electronic equipment and rack and cabinet structures)  25  is shown mounted on both the interior wall surfaces and on the flooring structures within the expandable shelter system design to demonstrate the benefits that follow from the present invention. As shown in  FIG. 20A , the expanded side section supports multiple cabinet structures  25  on the upper wall surfaces, above the vertical height of the folded flooring sections, while they are compactly stored away during the transport mode. Also, the flooring structure of the main shelter section supports multiple cabinet structures, in accordance with a predetermined configuration of equipment and cabinet structures within the shelter system.  
      Referring now to  FIGS. 25 through 36 , the double-side expandable shelter system of the illustrative embodiment will be described in great detail in both its transport and deployment modes of configuration.  
      In  FIGS. 25 and 29 , the double-side expandable shelter system of the present invention, constructed in accordance with ISO standards,  30  is shown arranged in its transport mode/configuration from different views, with its expandable sections  31  and  32  are nested inside the main shelter section  33 . As shown, the double side expandable shelter system  30  comprises: (1) main shelter section  3 B having (i) a flooring structure  35 , beneath which a replaceable full-length skid structure is affixed thereto, (ii) a top panel  36 , and (iii) first and second end panels  37  and  38 , interconnected within a framework constructed from frame members described in connection with the single-side expandable shelter system, in a conventional manner in accordance with ISO standards, to form a four-sided box-like container with two opposing openings along its length dimension; (2) a pair of four-sided expandable sections  31  and  32 , each having a side wall panel, a top panel, and first and second end panels, and a foldable flooring assembly including first and second flooring sections  17 A and  17 B that hinge together, as described above; and (3) a pair of side expandable section support mechanisms  21 A and  21 B (having telescopic-construction as described hereinabove), for supporting first and second side expandable sections  31  and  32 , respectively, during the deployment mode of operation.  
      In  FIGS. 30A through 36 , the shelter system is shown configured in its deployment/operating mode. During this configuration process, each side expandable section support mechanism  21 A,  21 B is pulled down into its operating configuration with horizontal support members  22 A,  22 B resting slightly above the ground surface. During the deployment process, the vertically-oriented foldable flooring assembly  17  unfolds and assumes its horizontal position, while being supported along its outer edges by support flanges provided along the perimeter of side wall panels  7 A and  7 B and front wall panel of the side expandable section  31 ,  33  during the final phase of the deployment mode. After each side section is slid out from the main shelter section, the telescopically-extended diagonal and horizontal support members support the load provided by expandable side sections  31  and  32 , respectively.  
      In  FIGS. 1 through 16 B, the expandable shelter system is shown without any interior equipment mounted within the expandable shelter system in order to help illustrate the construction of the system, and illustrate the simplicity and elegance of this inventive design. However, in view of  FIGS. 20A through 24 , the benefits and advantages gained by the design of the present invention are clear. Equipment of various kinds (e.g. electronic equipment and rack and cabinet structures)  25  can be permanently mounted on both the interior wall surfaces of the side expandable sections  31  and  32  above the height of the foldable flooring assemblies, and on the flooring structure of main shelter section.  
      As shown in  FIG. 35 , either the single or double side expandable shelter systems of the present invention can be arranged in their full deployment mode/configuration, while supported on a mobile carrier vehicle, as well as on the ground.  
      Also, as shown in  FIG. 36 , a plurality of single and/or double side expandable shelter systems of the present invention can be simply docked together to form a larger functioning unit  40 , such as a command center, or medical hospital, for use in diverse field applications. Such inter-shelter docking operations can be achieved directly between door ports, and/or using flexible sluice (conduit-type) subsystems well known in the art.  
      While the wall panels of the expandable shelter system described above are preferably constructed by (i) welding vertical reinforcement members to sheets of aluminum, (ii) then placing insulating foam sheets between these members, and (iii) finally bonding a second sheet of aluminum thereto using epoxy adhesive, pressure and spot welding techniques—to form strong, yet very lightweight wall panels for constructing shelter wall sections - - - , it is understood that other alternative techniques may be used with excellent results in particular applications. Similarly, while the flooring structure of the main/central shelter section, as well the foldable flooring panels used in the side expandable section, are preferably made by welding aluminum frame members together using a reinforced architecture, then sandwiching such frame structures and insulating foam between sheet of aluminum, and bonding and welding the same using epoxy adhesive and spot welding techniques, other alternative methods of construction may also be used with excellent results in particular applications.  
      It is understood that the expandable shelter systems of the illustrative embodiments may be modified in a variety of ways which will become readily apparent to those skilled in the art of the present invention and having the benefit of the novel teachings disclosed herein. All such modifications and variations of the illustrative embodiments thereof shall be deemed to be within the scope and spirit of the present invention as defined by the Claims to Invention appended hereto.