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Custom Fire Apparatus, Inc. <br />COMPARTMENTED BODY CONSTRUCTION MATERIALS and FABRICATION <br />FABRICATIONS: <br />The apparatus body compartments shall be fabricated using a combination of 12-gauge thickness and <br />14-gauge thickness, type 304 smooth sheet ASTM A240 stainless steel, with #4-polish RA52 surface <br />finish. All structural sheet metal fabrications shall be of 12-gauge material thickness, including, but not <br />limited to: side and rear lower level compartment floors, wheelwell outer panels, rear body corners, and <br />hose bed risers. <br />Where specified, custom fitted U-formed hinged compartment door outboard panels are to be fabricated <br />of .125" smooth sheet aluminum, and removable inner door panels are to be 3003 aluminum treadplate. <br />Other specified interior compartment shelving, trays, and shelving tracks shall be fabricated of smooth <br />aluminum, of designated thickness, and shall have a machine sanded finish. <br />The specified 4-way treadplate apparatus body components shall be type 3003 "Brite" aluminum C-102 <br />or equal pattern treadplate, NFPA approved no -slip diamond on step and walk surfaces. <br />PRECISION MACHINING AND FABRICATION <br />All individual apparatus body fabricated components are to be: computer designed for repeatable <br />tolerances, precision computer control machined for superior cut edge quality, and computer control <br />machine fabricated for assembled parts accuracy <br />FASTENERS: <br />All apparatus body screw type fasteners shall be stainless steel "low profile" button socket head cap <br />screws with stainless steel hex "Ny-Lok" threaded nuts designed to prevent loosening. Size of fasteners <br />and spacing shall provide for maximum structural integrity and no leakage in flanged areas between <br />fasteners. Any necessary exterior exposed nut fasteners shall be polished stainless steel or chrome plated <br />"acorn" covering fastener threads. NOTE: Hex head, truss head, Phillips pan head, or other large <br />profile fasteners shall not be used for assembly of fabricated sheet metal components. <br />CONSTRUCTION METHODS: <br />All individual fabricated body components are to be assembled with removable fasteners for ease of <br />modifications and repairs. Exterior compartment and hose body fabrications must be free of all <br />projections which might injure personnel or fire hose. NOTE: Where "nibbled" or other non -continuous <br />non -smooth cutting methods are used to machine the body material, all edges must be reworked/filed for <br />injury prevention and improved appearance. <br />The described construction methods are to ensure easy disassembly of the apparatus body in the <br />event of damage or need for future modifications. Apparatus designs or construction methods <br />which do not allow for disassembly and removal of major fabricated components are not to be <br />considered "equal" to this construction method, NOTE: metal bar shapes, tubular structures <br />and/or extrusions are not to be utilized in the construction of the apparatus body; metal <br />fabrications with integral flanges are to provide the needed structural integrity. <br />07/26/22 <br />- 106 - <br />