安装前要对起重机安装跨度，金属结构主梁的拱度、水平旁弯，小车轨道高低差、轨距偏差，桥架对角线等进行测量。
To install the crane span before installation, camber, level of metal structure of main girder bending, trolley rail height difference, gauge deviation, diagonal bridge survey.
本文简要介绍了该桥主梁设计中的一些问题及光弹模型试验的结果。
Here is given a brief description of its design with some results of photo-elasticity testing.
单主梁桥架上只有一个轨道，所以只找出两端各一点的标高相同即可。
Single girder bridge is only one track, so only to find a point at both ends of each elevation can be the same.
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