trestles
n. (搁桌面等的)支架( trestle的名词复数 ); 搁凳; 搁板桌; (脚手架等的)栈架结构
A trestle is a wooden or metal structure that is used, for example, as one of the supports for a table. It has two pairs of sloping legs which are joined by a flat piece across the top.
The girders are carried on trestles.
这些大梁是由支架撑着.