The M815 bolster truck and trailer combination is designed to transport utility poles, bridge sections, and logs. It is also called "Truck, Logging" or "Truck, Bolster, Logging". The trailer is carried on the truck when not in use.
The M815 bolster truck is equipped with a cab protector, front winch, midships winch, bolster assembly, and bolster trailer carrier. The carrier is connected to the truck frame to support the M796 bolster trailer in the loaded position. Ramps are used for loading and unloading the bolster trailer, Mounting brackets for the ramps are located at the rear section of the trailer carrier.
The M-796 Trailer, Bolster: General Purpose, 4-ton, 4-wheel has two bolster assemblies mounted over the midsection of the trailer frame, an adjustable reach, a bolster assembly mounted on the reach, safety chains, failsafe air-over-hydraulic wheel brakes, separate parking brake for both front wheels, an intervehicular electrical cable, two airbrake hoses, and a retractable landing gear mounted on the reach.