Opening of Bids - Spec S - One or More 2018 or Newer Emergency Medical Vehicle - Fire Service Inc - Part 1

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CITY OF SOUTH BEND The roof shall be a single 090 sheet of 5052-H32 alloy aluminum. The roof sheet shall be completely welded to the extruded roof assembly. The use of multi - section roofs shall not be acceptable due to the possibility of cracks causing environmental intrusion. The roof substructure assembly shall consist of four perimeter roof rail extrusions, lateral roof bows and interconnecting comer caps. The roof rail extrusions shall be engineered and designed by the primary manufacturer and shall be double hollow of 6063-T6 .125 aluminum An integrated roof recess shall be incorporated to create a smooth transition from the one piece roof sheet to the perimeter drip rail. The perimeter drip rail shall be extruded as a design feature of the roof rail extrusion. The roof rail extrusion shall overlay the side skin by one half inch. The roof sheet shall be scam welded to the perimeter roof extrusion. The lateral roof bows shall be two inch by two inch by.125 square extrusions of 6061-T6 alloy aluminum. The structural members shall be located to support the roof skin on fourteen inches between roof bows. The roof bows shall interconnect with the roof rails and be continuously welded at all contact points. The finished roof shall incorporate a machine rolled crown of not less than one and half inches in height to provide additional strength and allow water run off, A one inch by two inch by .125 6063-T6 extrusion shall be secured to the top of the vertical extrusions. The perimeter extrusion shall be welded to the vertical structures with a minimum of six inches of weld. An industrial adhesive shall be applied around the perimeter before the roof assembly is mated to the sill. The roof structure shall be attached to the sill and welded. To insure a complete contact with the industrial adhesive mechanical fasteners shall be employed to cinch the roof structure to the sill. The comer caps shall be designed to interlock with the roof perimeter, vertical comer extrusions and roof sheet. The comer caps shall be cast aluminum made from matched metal dies to insure a smooth and pleasing appearance. The caps shall act as a stress relief device to absorb energy and disperse the force along the roof extrusions in the event of a collision. The outer edge DOT lights shall be installed as described in section 5. 1. The comers of the modular body shall be designed and engineered by the primary manufacturer and constructed of 6063-T6 alloy aluminum. The comer extrusion shall be double hollow with a minimum thickness of . 125 and.250 at the outer comer. The extrusion is designed with a unique forty five degree angled appearance while maintaining very high strength and impact energy absorption. A polyurethane sealer shall be applied to seal the crevice between the comer extrusions and the side assemblies. The side assemblies shall be reinforced utilizing 6061-T6 alloy aluminum two by two box tubing, The side structures shall frame a perimeter around all door 10083-0016 08/27/18