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American Response Vehicles <br />10 <br />extrusion with an incorporated L mating surface. The lower door extrusion is a multi-chamber <br />construction with matching radius corner and surfaces to the floor sill. This combination of extrusion <br />and joint structure provides for strong joint strengths, and continuous contact surface between the <br />floor sill and the outer-body door extrusion. <br /> <br />FRONT AND SIDE WALL GUSSET PLATES: The front wall and side wall structural members will have <br />additional support with a fully welded gusset system that will be made of 5052-H32 aluminum plate, <br />.25-inch-thick by four by four-inch. <br /> <br />REAR AND SIDE WALL GUSSET PLATES: The rear wall and side wall structural members will have <br />additional support with a fully welded gusset system that will be made of 5052-H32 aluminum <br />plate, one quarter inch thick by four by four inch. <br /> <br />ROOF RAIL EXTRUSIONS: The roof corners of the modular body will be made from an extruded <br />aluminum structure that has an alloy of 6105-T6. The roof rail extrusion will be 4.55 x 3.5 inch with a 2- <br />inch radius on the outer corner. A full-length drip rail will be incorporated into the roof rail corner post <br />extrusion, drip rails at the top of the modular body that are not inclusive of the roof rail extrusion do <br />not meet the intent of the specification and are deemed non-compliant to this specification. The roof <br />rail extrusion will have an internal web member that runs on a 45-degree angle to the front and side of <br />the modular body. Where the internal web meets the exterior extrusion wall the internal web will flair <br />into a .125-inch radius giving a .25-inch wall thickness at the exterior wall of the extrusion. There will <br />be a .75-inch-flange on the lower side of the roof rail extrusion that is a side skin receiver. The side skin <br />receiver will be funnel shaped to allow the exterior side skin to fully seat into the roof rail extrusion. <br />There will be a .75 x .125-inch recess into the roof side of the extrusion for locating the roof sheeting. <br />This recess will have a 45-degree weld bevel. The interior wall of the roof rail extrusion that is <br />in-board of the side skin funnel will be 2-inch-wide so that they line up with the exterior side wall. The <br />interior wall of the roof rail extrusion that is in-board of the roof sheeting recess will be 2.25-inch-wide <br />so that they line up with the 2.25-inch roof bows. The interior walls of the roof rail extrusion will be <br />.125-inch-thick, and they will incorporate a 45-degree weld bevel on the interior corners. <br /> <br />ROOF SHEET: The four (4) edges of the sheet will be continuously welded to the roof rail extrusion to <br />prevent leaks. All perimeter welds will be ground smooth and worked smooth prior to the overall body <br />paint and finish. Non-fully welded roof sheets to the roof rail extrusions do not meet the intent of this <br />specification and are deems non-compliance to this specification. <br /> <br />ROOF BOWS: The roof sheet will be supported by full width .125-inch-thick x 2 x 2.25-inch architectural <br />box tubing. The roof bows will be located on twelve-inch centers. The roof bows will be MIG welded to <br />the roof rail extrusions with no less than four and one-half inches of continuous weld per end. The roof <br />sheet will be bonded to the roof bows with VHB (Very High Bond) adhesive tape. <br /> <br />LATERAL ROOF SUPPORTS: If this agency requires ducted ceiling HVAC, additional structural support <br />will be added as a result of the 2 inch ducted heat and A/C delivery system .2 x 2-inch