bottom girder

基本解释

The results showed that the pier, the top and the bottom plates of the main girder were all under compression.
结果表明：墩身和主梁的顶底板都受压，强度、刚度都满足要求。
Between the top board of the support and girder, between the bottom board and frusta when the level power is three times of the design horizontal supporting capacity.
充分保证了支座上座板与梁体、下座板与墩台之间在水平力为设计水平承载力三倍时无相对位移。
The fatigue property of framework-pore structural cement stabilized macadam is comparatively better because the bottom of the girder has formed a layer of grout in the course of forming the girder.
骨架空隙结构水泥稳定碎石的疲劳性能相对较好的原因是因为在成型梁的时候在梁的底部形成了一层水泥浆体。