Windsor-Severence Fire Protection District
Heavy Rescue
Production Specification
SVI #774 Page 21 of 126 April 19, 2010
The method of cab construction shall use a process incorporating techniques outlined in accordance with the American
Welding Society D1.1-96 requirements for structural steel welding. All aluminum welding shall be completed to the
American Welding Society and ANSI D1.2-96 requirements for structural welding of aluminum.
To provide a superior finish by reducing welds that fatigue cab metal; the roof, the rear wall and side panels shall be
assembled using proven industrial adhesives, designed specifically for aluminum fabrication, which exceed the strength of
a weld, for construction.
All interior and exterior seams shall be sealed for optimum noise reduction in addition to the most favorable efficiency for
heating and cooling retention.
The cab shall be constructed of 5052-H32 Marine Grade, one hundred percent primary aluminum plate. A single formed,
one (1) piece extrusion, manufactured from 6061-T6 100 percent primary one- quarter inch thick aluminum shall be used
for the “A” pillar adding strength and rigidity to the cab as well as additional roll-over protection. The cab side wall skins
and shall be 0.125 inch thick, the rear wall and roof skin shall be 0.19 inch thick, the front skin shall be 0.125 inch thick.
The cab shall incorporate tongue and groove fitted 6061-T6 0.25 inch thick aluminum extrusions for extreme duty
situations. The cab shall include multi-layer composite insulation for improved cab heating and cooling in addition to noise
reduction.
Proposals offering products built with anything less than the alloy-temper mentioned or from any other material, other than
aluminum, shall not be considered. Additionally, any cabs utilizing recycled or recovered aluminum plate or extrusion
products shall not be considered due impurities in the composition leading to a lack of strength.
The cab shall incorporate a fully enclosed design, allowing for a spacious cab area with no partition between the front and
rear sections of the cab. The walls of the vehicle shall include roof supports allowing for an open design. The outside
dimension of the cab shall be 96.00 inches wide with a minimum interior width of 90.00 inches.
The cab overall length shall be 150.38.00 inches in length with 74.00 inches from the centerline of the front of the axle to
the back of the cab. The cab shall offer an interior height of 58.00 inches from the front floor to the headliner and a rear
floor to headliner height of 75.00 inches in the crew area, at a minimum. All interior measurements shall include the area
within the interior trimmed surfaces and not to any unfinished surface.
In order to offer the optimum amount of cab space to occupants, there shall be no consideration given for any cab unable
to comply with the minimum measurements for interior cab space as listed.
The cab shall include a driver and officer area with two (2) cab door openings. The front door opening shall offer a clear
door opening of 43.00 inches wide X 56.00 inches high. The rear door opening shall offer a clear door opening of 34.00
inches wide X 84.00 inches high. This style of cab shall also include a crew area offering up to ten (10) seating
positions.
The cab shall incorporate a two (2) step configuration from the ground to the cab floor for each door opening. The lower
step shall be constructed of heavy duty safety grating which meets or exceeds Federal Specification RRG-1602-latest
revision and performs under dry, greasy, muddy, soapy and icy conditions and offers open drainage.
The first step for the driver and officer area shall measure 11.44 inches deep X 31.13 inches wide. The intermediate step
shall measure 8.75 inches deep X 33.00 inches wide. The height from the first step to the intermediate step and the
intermediate step to the cab floor shall not exceed 11.00 inches.
The first step for the crew area shall measure 12.13 inches deep X 20.44 inches wide. The intermediate step shall
measure 10.50 inches deep X 23.00 inches wide. The height from the first step to the intermediate step and the
intermediate step to the cab floor shall not exceed 12.50 inches.
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