trestle

Short definition from Wiktionary

Noun

1. 1
   A horizontal member supported near each end by a pair of divergent legs, such as sawhorses.
2. 2
   A folding or fixed set of legs used to support a tabletop or planks.
3. 3
   A framework, using spreading, divergent pairs of legs used to support a bridge.
4. 4
   A trestle bridge.