During the installation of the bridge, there are also curved, deformed, and straight connectors between the straight stages, which should be matched by the bridge manufacturer. The thickness of the connecting thin steel plate should not be less than the thickness of the bridge thin steel plate. The interface should be flat, without distortion, protrusion, or depression. The half round head galvanized bolts used for connection should be on the inner side of the bridge, and the bolt length should be appropriate. After tightening, the exposed length should be 2-5 teeth. For horizontally installed cable trays, the connection head of the straight section should be set at around 1/4 of the distance between the two supports and hangers as much as possible.

1.一般情況下不在施工現(xiàn)場(chǎng)制作橋架。由于特殊原因必需時(shí)，可利用現(xiàn)有的橋架改制非標(biāo)準(zhǔn)彎通和變徑直通。改制和切斷直線(xiàn)段橋架時(shí)，均不得用氣、電焊切割，應(yīng)用專(zhuān)用切割工具。改制的橋架必須平整，及時(shí)補(bǔ)漆，面漆顏色應(yīng)與其它橋架相近。因?yàn)樾陆ńㄖ锢铮瑯蚣馨惭b一般都在混凝土結(jié)構(gòu)工程完成數(shù)月甚一年之后進(jìn)行，混凝土收縮逐漸減小。伸縮量一般不會(huì)超過(guò)建筑物伸縮縫寬L。

1. Generally, cable trays are not manufactured on the construction site. If necessary due to special reasons, existing cable trays can be used to modify non-standard bends and variable diameter straights. When restructuring and cutting straight section cable trays, gas or electric welding cutting is not allowed, and special cutting tools should be used. The restructured cable tray must be flat, repainted in a timely manner, and the color of the topcoat should be similar to other cable trays. In new buildings, the bridge installation is usually carried out months or even a year after the completion of the concrete Structural engineering, and the concrete shrinkage gradually decreases. Generally, the expansion amount will not exceed the width L of building Expansion joint.

2.橋架跨越建筑物的伸縮縫處，按GB50168規(guī)定，應(yīng)設(shè)置伸縮縫，保證橋架及敷設(shè)在橋架內(nèi)的電纜在建筑物伸縮不危及其本身時(shí)能自由伸縮，不受損壞。

2. At the Expansion joint where the bridge crosses the building, Expansion joint shall be set according to GB50168 to ensure that the bridge and the cable laid in the bridge can expand freely without damage when the expansion of the building does not endanger its own safety.

3.若發(fā)現(xiàn)或從土建單位了解到建筑物伸縮縫較大有可能超過(guò)L時(shí)，以便于在橋架中留電纜(或電線(xiàn))的伸縮余量，這個(gè)余量應(yīng)大于伸縮縫寬L。應(yīng)按實(shí)際做好伸縮處理。要跨越伸縮縫的橋架少一側(cè)有較長(zhǎng)的直線(xiàn)段，宜超過(guò)30m，或伸縮縫兩側(cè)直線(xiàn)段橋架相加有30m，中間無(wú)水平或垂直彎通。

3. If it is found or learned from the civil engineering unit that the Expansion joint of the building is large and may exceed L, so as to leave expansion allowance for cables (or wires) in the bridge, this allowance should be greater than the width of Expansion joint L. Expansion and contraction treatment should be done according to the actual situation. At least one side of the bridge to cross the Expansion joint has a long straight section, which should exceed 30m, or the straight section bridges on both sides of the Expansion joint add up to 30m, and there is no horizontal or vertical bend in the middle.