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FH (Frame Height) The distance from the top of the frame to the ground. See Chassis Dimensions. Fifth Wheel A coupling device mounted on a tractor that contains a provision for accepting and holding the kingpin of a semi...

Bus Emergency Exits and Window Retention and Release This Standard applies to buses, except buses manufactured for the purpose of transporting persons under physical restraint. It establishes requirements for the...

Vehicle safety certification is more than a label on the driver’s door. It is the manufacturer’s legal declaration that a vehicle complies with all applicable Federal/Canadian Motor Vehicle Safety Standards, and it plays...

Rear Impact Protection This Standard applies to trailers and semi-trailers with a GVWR of 10,000 lbs. (4,536 kg) or more. It requires those new trailers and semi-trailers to be equipped with a rear-impact guard...

New Pneumatic Radial Tires for Light Vehicles This Standard applies to new pneumatic tires for use on MPVs, trucks, trailers and buses with a GVWR of 10,000 lbs. (4,536 kg) or less and that were manufactured after 1975...