Sometimes referred to as a stretch flat drop or stretch step deck. In addition to having a stepped frame, this trailer can be extended to conform to long loads. The HD refers to the trailers’ ability to accept a gooseneck extension and pin-on axle. These additional parts enable the trailer to haul heavier loads. This means that the frame and other subcomponents have been upgraded from the regular, extendible step deck.
Rollers in the frame rails allow the unit to be extended or retracted with ease. There are numerous locking points along the trailer to give the operator the flexibility to choose how much to extend.
The locking actuators are specialty-built units that pull as hard as they push. Even if lock pins are full of road grime, the locking actuators will lock and unlock.