Specifications include, but are not limited to: CORROSION PROTECTION
There shall be a system to prevent corrosion of all underbody components. The builder shall
provide a detailed description of the corrosion protection process.
SIGN – VEHICLE DIMENSION AND WEIGHT
A sign shall be provided in the front cab area indicating the height of the completed apparatus
in feet and inches, length of the completed apparatus in feet and inches, and the gross vehicle
weight rating (GVWR) in tons.
The seating capacity in the cab shall be five (5).
MAXIMUM OVERALL HEIGHT
The maximum overall height of the apparatus shall be 114”.
MAXIMUM OVERALL LENGTH
The maximum overall length of the apparatus shall be approximately 354”.
The wheelbase of the vehicle shall be no greater than 180”.
The manufacturer shall be responsible for proper weight distribution upon the chassis and
The apparatus when loaded, shall have not less than 25% nor more than 45% of the weight on
the front axle and not less than 55% nor more than 75% on the rear axle. A certified weight
certificate showing weights on the front axle, rear axle and total weight for the completed apparatus with the water and fuel tanks full, but without personnel, equipment and hose shall
be provided at the time of delivery.
In accordance with NFPA 1901, it shall be the responsibility of the purchaser to notify the
manufacturer in the purchaser's specification of any hose, ground ladders, or equipment to be
carried by the apparatus that exceeds the minimum requirements of the NFPA 1901 standard
in effect at the time of the bid.
GROSS VEHICLE WEIGHT RATINGS
Front Vehicle Weight Rating shall be: [20,000#]
Rear Vehicle Weight Rating shall be: [24,000#]
Gross Vehicle Weight Rating shall be: [44,000#]
VEHICLE PERFORMANCE ANALYSIS REPORT
A performance analysis report shall be run on the vehicle, as ordered, using computer
software to determine top speed, gradeability, optimum shift points and acceleration on
various grades. The report shall be delivered with the completed vehicle, but shall be
available prior to engineering of the vehicle.
The chassis frame shall be built with two variable section steel channels with a minimum of
six (6) cross members. Pump shall not be counted as a cross member. The side rails shall be
of heat treated steel with tapering measurements. Each rail shall have a section modulus of
21.7, a minimum elastic limit of 120,000 PSI and a minimum resisting bending moment of
2,601,600 inch pounds. The cross members shall be of heavy duty, fabricated, all-welded
design, made out of a minimum of 50,000 psi material. The frame and cross members shall be
a bolted assembly utilizing 5/8" flange head grade eight bolts and Spiralock® flange nuts.
Spiralock® nuts shall be used exclusively in the frame assembly for mounting spring hangers,
steering gear, engine, transmission, etc. because of their ability to maintain a constant torque
tension and prevent vibration loosening. Their design shall provide for an even thread load
distribution over the bolt, increased fatigue strength and life, and clamping torque. All holes
made must be used and any holes in the frame for options not required on this chassis are not
Frame rails less than or equal to 480" in length shall receive a duo-coat primer: an E-coat
followed by a powder coating. This duo-coat process meets 1000 hours of salt spray testing
per ASTM B117 test procedure. Frame rails greater than 480" in length shall be powder
coated only. The inside of the rails shall be hand re-sprayed to insure coverage. This process meets 240 hours of salt spray testing per ASTM B117 test procedure.