二、跨度206呎(62.79米)下承柏式桁梁改善限界 1.原桥概况:如图3所示为原桥之梗概,梁之净宽尚可满足4.88米之要求,而自轨底至桥门架之最低点仅5.1米,且为维持此限界,一部份桥枕已经刻槽过深,削弱了桥枕的断面。在当时对这条铁路还没有电化的要求,所以改善限界是以高度6米为标准的。 Second, the span of 206 feet (62.79 meters) under the Bojie truss to improve the boundary 1. The original bridge Overview: Figure 3 shows the outline of the original bridge, the net width of the beam is still 4.88 meters to meet the requirements of the self-track To the lowest point of the bridge gantry only 5.1 meters, and to maintain this limit, part of the bridge has been grooved too deep, weakening the bridge section. At that time, the railway was still not electrified. Therefore, the improvement of the boundary was based on a height of 6 meters.