Specifications include, but are not limited to: Chassis Build for a Fire Department Heavy Duty Rescue Squad Truck. CHASSIS The chassis provided shall be a new, tilt-type custom fire apparatus. The chassis shall be designed and manufactured for heavy-duty service, with adequate strength and capacity for the intended load to be sustained and the type of service required. WHEELBASE The wheelbase of the vehicle shall be no greater than 255.50. GVW RATING The gross vehicle weight rating shall be a minimum of 46,800. FRAME The chassis frame shall be built with two (2) steel channels bolted to five (5) cross members or more, depending on other options of the apparatus. The side rails shall have a 13.38" tall web over the front and mid sections of the chassis, with a continuous smooth taper to 10.75" over the rear axle. Each rail shall have a section modulus of 25.992 cubic inches and a resisting bending moment (rbm) of 3,119,040 in-lb over the critical regions of the frame assembly, with a section modulus of 18.96 cubic inches with an rbm of 2,275,200 in-lb over the rear axle. The frame rails shall be constructed of 120,000 psi yield strength heat-treated 0.38" thick steel with 3.50" wide flanges. FRAME REINFORCEMENT In addition, a mainframe inverted "L" liner shall be provided. It shall be heat-treated steel measuring 12.00" x 3.00" x .25". Each liner shall have a section modulus of 7.795 cubic inches, yield strength of 110,000 psi, and rbm of 857,462 in-lb. Total rbm at wheelbase center shall be 3,976,502 in-lb. The frame liner shall be mounted inside of the chassis frame rail and extend the full length of the frame. FRONT NON DRIVE AXLE The front axle shall be of the independent suspension design with a ground rating of 22,800 lb. The turning angle shall be 45 degrees. FRONT SUSPENSION Front independent suspension shall be provided with a minimum ground rating of 22,800 lb. FRONT SHOCK ABSORBERS Heavy-duty telescoping shock absorbers shall be provided on the front suspension. FRONT OIL SEALS Oil seals with viewing window shall be provided on the front axle.