Plywood lined

The interior of a van and some reefers that have a complete covering of plywood on the sides and sometimes on the ceiling.

Piston

A disk or short cylinder fitting closely within a tube in which it moves up and down against a liquid or gas, used in an internal combustion engine to derive motion, or in a pump to impart motion.

Piggy Back Specs

Extra heavy duty measures built into trailers for railroad use; i.e. reinforced lower rail, 12″ cross members, etc.

Personal Watercraft (PW)

A PWC (Personal Water Craft) is a small pleasure craft that uses an inboard jet drive as its primary source of propulsion and is designed to be operated by a person or persons sitting, standing, [...]

Partially Insulated

A trailer with one or more parts not insulated. these trailers are used for products that do not require strict temperature control.

Outboard Powered Boats (OB)

An outboard motor is a propulsion system for boats, consisting of a self-contained unit that includes engine, gearbox, and propeller or jet drive, designed to be affixed to the outside of the transom.

Out Riggers

Found on low beds and drop deck flatbeds and allows the width of the floor to be widened for a larger load capacity.