Trestle /(?)/

Tres·tle

Trestle

n.
  1. A movable frame or support for anything, as scaffolding, consisting of three or four legs secured to a top piece, and forming a sort of stool or horse, used by carpenters, masons, and other workmen; also, a kind of framework of strong posts or piles, and crossbeams, for supporting a bridge, the track of a railway, or the like.
  2. The frame of a table.

Phrases & Compounds
Trestle board
a board used by architects, draughtsmen, and the like, for drawing designs upon; -- so called because commonly supported by trestles.
Trestle bridge
See under Bridge, n.