现在，我只需走过一段和我的脚一样宽的横梁，除了一根悬挂的绳索，什么也靠不住。

Now, all I had to do was walk along a beam that was maybe the width of my foot, with nothing to grasp except that dangling line.

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该场地，通过建造大横梁来支持高架公路，横梁的尺寸约为55英尺宽(17米)。高架公路的宽度测量约为90英尺宽(27米)。

The site, which is punctuated with large cross beams that support the elevated roadway, is approximately 55 feet wide (17 meters). The highway above measures 90 feet wide (27 metres).

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因而对轨道梁或横梁而言，就遇到了宽支座时梁内力如何计算的新问题。

Therefore for crane grider and crossbeam, have met new problem that how to calculate internal force of the beam while meeting the wide bearing.

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