- Trucks, Light, Comm. 4 x 2, 3,000 to 11,000 lb. GVW.
- Trucks, Light, Comm. 4 x 4, 3,000 to 11,000 lb. GVW.
- Trucks having pintle height per SAE J849 for towing trailers having up to 75 percent of the
truck's VIN plate GVWR; 12 volt electrical - with and without source of air for braking
Trucks, Med., Comm. 4 x 2, 14,000 to 21,000 lb. GVW.
Trucks, Med., Comm. 4 x 2, 24,000 to 32,000 lb. GVW.
Trucks, Heavy, Comm. 6 x 4, 34,000 to 64,000 lb. GVW.
Trucks, Med., Comm. 4 x 4, 14,000 to 34,000 lb. GVW.
Trucks, Heavy, Comm. 6 x 6, 36,000 to 60,000 lb. GVW.
- For off-road equipment prime movers, wheeled and crawler vehicles having drawbar pin
height of at least 26-inches per SAE J749; no electrical or air sources for lighting or
Based on the safe operation premise that any trailer should not be towed by a truck having a
gross vehicle weight rating (GVWR) on the truck's VIN name plate less than 133 percent of the
GVWR on the cart trailer's VIN name plate, these trailers shall be required to properly tow and
perform as specified herein only behind those trucks which have a GVWR exceeding the trailer's
GVWR by at least 25 percent:
Where 133 percent x trailer GVWR = minimum truck GVWR.
When and as specified by the contracting activity (see 6.2, T-6), the trailer shall be matched to
the user's prime mover (truck/equipment) to insure complete, compatible, powered combination.
For off-road equipment useage, the trailer chassis shall include the slow moving vehicle sign on
the rear as specified in 3.9.
3.7.2 Trailer chassis mobility. The trailer chassis shall conform to the mobility
characteristics specified herein when either traveling with the intended operating equipment
payload, when known, or traveling with simulated payload equal to the trailer chassis' GVWR on
the VIN plate. The chassis shall operate without malfunction, damage, or permanent
deformation. The loaded chassis shall:
a. Travel over smooth primary paved highways at minimum 50 mph speed.
b. Travel over gravel and dirt surfaced secondary roads, haul roads, and trails up to a
minimum 20 mph speed.
c. Negotiate off-road terrain, grades, side slopes, mud, sand, and snow to and from