机架采用槽钢作为主梁，中间加加强筋板焊接而成。
The rack USES the channel steel to take the main body, the middle with stiffener board welded together.
试验证明，在纵向预应力作用下的计算截面应取道床板全部截面作为主梁下翼缘共同工作。
Tests show that the cross section of the whole deck, working jointly as the lower flange of the main girder, should be taken for the calculated section subjected to longitudinal prestressing force.
栈桥可以有多种结构形式，较为常见的一种是以基坑的混凝土支撑为主梁，以现浇混凝土板为桥面板的栈桥。
The bridge can be of many different structures, a common one of which is using the concrete support of the pit as its girder and cast-in-situ reinforcement concrete plates as its decks.
应用推荐