3.2.5 Curb weight. Curb weight of the vehicle shall include the weight of the chassis and
cab, with all attachments, accessories and equipment; fifth wheel; full complement of fuel
lubricants and coolant.
3.2.6 Gross vehicle weight rating. Gross vehicle weight rating (GVWR) shall consist of the
curb weight, operator (weight computed at 200 pounds), and a 28,000 pound load imposed on the
fifth wheel. The load imposed on the fifth wheel shall be so distributed that the vehicle GVWR
rating and the design capacities of the chassis and components are not exceeded.
3.2.7 Gross combination weight rating. Gross combination weight rating (GCWR) shall
consist of the curb weight, operator (weight computed at 200 pounds), and weight of a
semitrailer loaded to provide not more than 100,000 pound GCWR.
3.2.8 Ratings. Vehicle ratings shall be manufacturer's published ratings for Class I road as
defined in Table 9 of SAE J688. Component and vehicular ratings shall not be raised to meet the
requirements of this specification. When published ratings are not available, verification of
ratings shall be submitted. Minimum GVWR and GCWR shall conform to 3.2.6 and 3.2.7.
3.2.9 Dimensions. Dimensions for the vehicle in the unladen position shall not be more than
that specified in Table II.
TABLE II. DIMENSIONS
Fifth wheel height:
a. Down position from ground level (plus 1 inch - minus 0)
b. Raised position from ground level (minimum)
c. When specified (see 3.5.5), raised position at least
Landing Wheel clearance (maximum).
Centerline of axle to rear of frame (maximum).
Swing radius, not including fifth wheel travel forward
when being raised, not less than
Ramp height at rear of chassis (plus or minus 1 inch)
NOTE: The towed vehicle is a 40-foot semitrailer for transporting one 40-foot or two 20-foot
containers. Dimensions are as follows:
Kingpin location from front
Overall height, platform to ground
Overall height with payload
Center of gravity rearward of kingpin
Center of gravity above ground level
Semitrailer gross weight