as shown in fig1 a to 1c , an edge beam ( eb )( 3 ) is constructed of two vertical perforated rolled shapes ( 1 a , 1 b ) having webs that are inverted toward the center of the beam and one bottom track ( 2 ) having vertical flanges positioned against bottom lips of the vertical rolled shapes . the two vertical members and the bottom track compose a u - shaped edge beam ( 3 ) having an open top to permit the insertion of mechanical and utility distribution in the longitudinal and transverse edge beams of the modules . the two vertical perforated rolled shapes ( 1 a , 1 b ) function as compression members of the edge beam . the three basic components of the edge beam are positioned so as to provide access for the press joining tools . in particular , the construction of the edge beams permits automatic insertion of the tool head so that the bottom flanges of the compression members can be press joined directly to the web of the bottom track ( 2 ) along the full length of the edge beam at precise locations and frequency to develop the variable required shear loading resistance to bending moments of the edge beam . as shown in fig2 , the edge beam &# 39 ; s depth can be varied from 6 ″ to 14 ″ and the width can be varied from 6 ″ to 12 ″ to accommodate various air duct sizes , required piping sizes , and drainage grades . the gages and lengths of the rolled shapes can be varied and connected by press joining and varying jointing of structural sections to accommodate varying stresses within the same edge beam , thereby matching selected gages to loading characteristics , minimizing the cost of steel materials and enabling handling of shorter structural sections . these factors necessarily result in varied structural cross sections of the edge beam , as seen in fig2 . the particular cross section of the edge beam is designed to match the required strength characteristics of the edge beam to the stress variations occurring in the edge beam for the various loads developed in the transporting frame assembly as seen in fig7 , the lifting strength required for setting modules , and the opening spans of the marriage and exterior walls . note that the opening spans of the marriage and exterior walls can be reinforced with continuous vertical header beams to accommodate architectural open glazed ( large glass areas ) design and open architectural planning between modules . floor panels ( see fig3 ), ceiling panels and roof panels are all framed in the transverse dimension between the edge beams of the panels with joist systems ( 4 ) 2 ″- 0 ″ on - center and supported with joist connectors or hangers ( 11 ) as shown in fig6 . the joist connectors extend across the top of the edge beams and are assembled by press joining to secure the vertical members of the edge beam in place . this arrangement ties the upper ends of the vertical members together . intermediate beams ( ib ) ( 5 ) and double joists ( 6 ) are anchored in similar fashion with connectors ( fig6 ) of a width to accommodate the transverse members . the connectors ( 11 ) are shaped for automated placement by a carousel , and are installed as the panel advances in a 4 ft stepped motion . the connectors ( 11 ) are provided with openings or perforations for permitting mechanical and utility distribution to run from the interior of the edge beam through the openings and into the transverse member . note that cutouts are provided in the sides of the connectors to provide access for robotic welders to connect the connectors to the transverse members . the exterior and marriage wall panels ( fig4 ) are constructed of 6 inch minimum width wall studs of 20 gage galvanized steel and can be increased in width and gage as building heights or floor and roof loadings increase . in the exterior and marriage walls , major structural studs ( 7 ) repeat every 4 ′- 0 ″ on - center . the minor non - load bearing studs ( 8 ) are provided for sheathing stiffening and repeat an alternate 4 ′- 0 ″ on - center . all vertical loads of the modular structure are transferred to the foundation via the structural exterior and marriage wall structural studs ( 7 ). as shown in fig1 c , the major structural studs ( 7 ) are strengthened with galvanized steel plates ( 9 ) at the top attachment to the wall panel &# 39 ; s continuous header beam ( 10 ) and at the bottom attachment to the floor panel . the triangular shaped reinforcement plates are press joined to the studs during the structural fabrication of the wall panels . the bottom plates are screwed to the floor panels during the module panel erection . the construction of the continuous exterior and marriage wall header beam ( 10 ) is similar to the edge beam and intermediate beam fabrication except for the intermittent bottom track , which allows the wiring harnesses and piping that has been inserted through the open top , to connect with electrical wiring and piping in the wall panels below during the module panel erection . the continuous top wall header beam serves several unique functions including horizontal shear resistance supplemental to the wall sheathing materials in the exterior and marriage wall panels , provision for an open channel track for the insertion of metal assemblies to bolt and / or mechanically splice stacked modules together at varied locations as may be required structurally , and an open space for unforeseen mechanical and electrical systems . the inversion of the two vertical perforated rolled shapes web members allows foamed insulation to permeate the perforations and isolate the steel web members from the inside surface of exterior and marriage wall sheathing material , thereby creating a nearly complete thermal break and insulation of the structure . the invention employing innovative light gauge steel module framing techniques includes a method of automated manufacture . the method is possible through the use of a programmed computer driven automated system for module panel manufacture . the system directs the movement of equipment and material employed in the manufacturing process . the automated system is capable of placing every structural member , sheeting material and thermal insulation using the same manufacturing line to create floors , exterior and marriage walls , interior walls , ceilings , roofs and gables of varying lengths and widths in the order required for module assembly . the automated manufacturing line ( fig8 ) advances the light gauge steel framing assembly four feet after the completion of each stage on the framing table and assembly line . the various stages of the manufacturing process are described below . in this stage flat steel is loaded into purchased steel roll - forming machinery to custom form and cut steel shapes in varied cross sections and lengths as needed . in addition , the roll - form machinery will cut access holes in the webs of the steel shapes as necessary . alternatively , pre - formed transverse and longitudinal members can be purchased from existing companies . during this stage the crane lifts the steel shapes that are necessary for edge beam construction of a particular panel and transports them to the framing table in preparation for the third stage . in this stage the edge beam components ( 1 a , 1 b ) are manually placed in the track ( 2 ) with the webs back - to - back , resulting in a placement of the components that is inverted relative to the typical box - beam member placement . this arrangement gives the press - joining equipment access to the various connection points . alternatively , the loading of the edge beam components could be automated . in this stage the flanges of edge beam members ( 1 a , 1 b ) are press - joined to the web of the track ( 2 ). stage ( 5 ): placement of steel connectors ( 11 ) over edge beam assembly in this stage a carousel selects the appropriate width , depth and gauge hanger and drops it on top of the edge beam assembly as shown in fig1 a and in fig6 . although providing proprietary access and fins for connection , the connector cradle design functions similarly to a joist hanger in conventional construction . stage ( 6 ): placement of transverse members into steel connectors ( 11 ) in this stage an overhead automated hopper system places the transverse framing members into the connector cradles from above . alternatively , the transverse framing members could be placed manually . the fin of the connector and web of the transverse member are welded together at two points . alternatively , smaller press - joining machinery could be developed to access and join the pieces . stage ( 8 ): sheeting conveyor and vacuum lifter selects and conveys appropriate sheeting material in this stage a vacuum lifter on a moveable framework will select and vacuum transport one sheet of material from the material stack onto a conveyor system . the conveyor transports the material to the sheeting preparation machine in the ninth stage . in this stage the material is conveyed through the sheeting preparation machine and is punched and routed as required . as the material advances , adhesive is applied to the top of the sheeting in preparation for the tenth stage . in this stage the sheeting material is conveyed under the framing assembly and pressed up and adhesively joined to the framing members . in addition , fastening equipment such as automated screw guns or steel nail guns mechanically fasten the sheeting material to the framing members from below the panel plane . stage ( 11 ): transfer of frame with bottom sheeting to a conveyor the framing assembly with attached bottom sheeting is transferred to a conveyor system . stage ( 12 ): installation and pressure testing of pre - assembled mechanical and utility systems in this stage the mechanical and utility systems are fed through the holes in the transverse members and along the open edge beam channel from above . once connections have been made between systems , the assembly is pressure tested for quality control . in this stage the framing assembly , with attached lower sheeting and installed mechanical and utility systems , advances to a vapor control area and the void between members is insulated with expanding foam issued from nozzles mounted above the panel plane . the insulation can either be a soy “ bio - based ” formulation or a traditional foam product . nozzles above the panel plane lay a bead or coating of adhesive on top of the exposed members in preparation for the fifteenth stage . after selection by a vacuum lifter and passing through the sheeting preparation machine , as in stage 9 , the sheeting material is lowered and pressed onto the adhesive applied in stage 14 . in addition , mechanical fastening equipment such as automated screw or nail guns mechanically fastens the sheeting material to the framing members from above the panel plane . the scissor lift supports have a low - friction finish on a table top - like surface that allows the panel to slide into position . in this stage the floor panel ( fig3 ), when complete , is lowered slightly on scissor lifts . in this stage , the module walls ( fig5 ) are manufactured in a process similar to the above . the interior walls ( fig5 ) are manufactured together as one contiguous panel with top and bottom track web cut to length and flanges left uncut before stacking on top of floor panel . exterior and marriage walls ( fig4 ) are manufactured similarly and stacked on top of the interior wall panels . the stack including floor panel , exterior and marriage wall panels , and interior wall panels is referred to as the module base stack ( mbs ). in the nineteenth stage , air casters are inserted under the module base stack . stage ( 20 ): module base stack manually floated on air casters to the module base erection bay the module base erection bay contains an overhead hoist system , which is necessary for the twenty first and twenty second stages . in this stage , the overhead hoist system lifts and rotates the exterior and marriage wall panels into place before the wall framing is manually fastened , using screws or nails , to the floor panel using connection plates . in this stage the interior walls are raised as a panel before the track flanges are cut for each wall individually . the newly separated walls are then mechanically fastened to the structure as needed . the completed structure is referred to as the module base ( mb ). similar to stages 1 - 18 as described above , the attic floor , gable and roof panels are manufactured and stacked as an attic stack ( as ) on the scissor lift supports . also , the first floor ceiling panels are manufactured as single elements to complete first and intermittent floor modules . in this stage the overhead crane transports the attic stack to the gable assembly bay . the gable assembly bay contains a large elevated work surface and a sliding and pivoting diamond - blade saw . the overhead crane lifts the roof panels from the attic stack and the roof panels are transported to the roof assembly bay . the roof assembly bay contains an elevated work surface , roofing materials and fastening equipment . with the roof panels placed on the roof assembly bay elevated work surface , removable lifting hinges with integral crane loops are mechanically fastened to the panels . after installation of the lifting hinges , roofing materials , such as shingles or architectural metal and any necessary trim , are applied . while assembly of the roof occurs , the gable panel in the gable assembly bay ( gab ) is cut 80 % through with the diamond - blade saw . the cuts delineate the gable panel into four gable sections . the saw can be manually or automatically positioned for this stage . in this stage , steel angles are mechanically fastened with one leg of the angle perpendicular to the plane of the panel with the leg projecting into the cuts made in stage 26 , and the other leg parallel to the plane of the panel resting on top of the sheeting material . stage ( 28 ): application of exterior finish to gable sheeting and installation of attic vent in this stage , an exterior finish , such as vinyl siding or a fiber - cement siding product , is mechanically fastened to the gable sheeting . additionally , an attic vent and any specified trim is mechanically fastened to the gable sheeting . in this stage the overhead crane lifts the gable panel and rotates the panel 180 degrees before replacing the gable panel on the attic floor panel . the gable panel sheeting , with the exterior surface applied , is now facing the floor with exposed framing facing the ceiling ( upwardly ). in this stage the diamond - blade saw cuts through the remaining 20 % of the gable panel , thereby separating the gable panel into four pieces ( fig1 ). similarly to stage 27 , steel angle is installed on the edges of the gable pieces . as shown in fig1 , the four gable pieces are lifted , rotated , and moved into place by workers and the overhead crane . in this stage , the overhead crane lifts and transports the roof panel to the gable and attic floor assembly bay and lowers the roof panel onto the positioned gable pieces . in this stage , a roof roller apparatus that was patented by the present inventor ( u . s . pat . no . 6 , 705 , 051 b1 ) and roof hinges are mechanically fastened to the roof panel , gable pieces and attic floor panel . the disclosure of u . s . pat . no . 6 , 705 , 051 is incorporated herein by reference . in this stage , the overhead crane lifts the attic stack and transports it to the module erection bay . the module erection bay is as described in stage 20 . the overhead crane lowers the attic stack onto the assembled module base which was constructed in stages 21 and 22 . in this stage , the attic stack is mechanically fasten to the module base and the mechanical and utility connections are hooked up between wall , floor and roof panels . in this stage , the assembled module is pushed on air casters to typical finishing stations for remaining exterior finishes , interior wall and floor finishes , cabinetry , plumbing and electric fixture installation and finish trim . alternatively , the module advance could be accomplished automatically . stage ( 38 ): finished module ready for transport assembly mounting and shipment the module is referred to as a finished module after completion of stages 1 - 37 and is now ready to be placed on a transport assembly and provided with a module cover , which provides temporary surface protection during shipment . the module is now ready to be shipped . the novel module construction utilizes a light gauge steel framing system that incorporates press joining and robot welding of light gauge metals . the structure and process accommodates the multi - directional orientations required of application tools to fasten multiple members . the process is capable of producing complex composite structural configurations that utilize the strength capabilities of light gauge steel rolled shape members . it is intended that the invention be defined by the claims appended hereto , and their equivalents .