1) Expansion joint shall be set for straight section steel cable bridge with length more than 30m, aluminum alloy or glass fiber reinforced plastic cable bridge with length more than 15m; compensation device shall be set for cable bridge crossing deformation joint of building

(2)电缆桥架转弯处的弯曲半径，不小于桥架内电缆更小允许弯曲半径，

(2) The bending radius of the cable tray at the turning point shall not be less than the minimum allowable bending radius of the cable in the tray,

更小允许弯曲半径

Minimum allowable bending radius

1 无铅包钢铠护套的橡皮绝缘电力电缆

1. Rubber insulated power cable with lead-free steel sheath

10D

10D

2 有钢铠护套的橡皮绝缘电力电缆

2. Rubber insulated power cable with steel sheath

20D

20D

3 聚氯乙烯绝缘电力电缆

3. PVC insulated power cable

10D

10D

4 交联聚氯乙烯绝缘电力电缆

4. Cross linked PVC insulated power cable

15D

15D

5 多芯控制电缆

5. Multi core control cable

10D

10D

注：D为电缆外径。

Note: D is the outer diameter of the cable.

(3)当设计无要求时，电缆桥架水平安装的支架问距为1．5～3m；垂直安装的支架间距不大于2m

(3) When there is no requirement in the design, the spacing between supports for horizontal installation of cable tray is 1.5-3m; the spacing between supports for vertical installation is not more than 2m

(4)桥架与支架间螺栓、桥架连接板螺栓固定紧同无遗漏，螺母位于桥架外侧；当铝合金桥架与钢支架同定时，有相互问绝缘的防电化腐蚀措施

(4) The bolts between the bridge and the bracket and the bolts of the bridge connecting plate are fixed tightly without omission, and the nuts are located outside the bridge; when the aluminum alloy bridge and the steel bracket are the same, there are anti electrochemical corrosion measures for mutual insulation

(5)电缆桥架敷设在易燃易爆气体管道和热力管道的下方，当设计无要求时．与管{首的帚小海距．符合下表的规定

(5) The cable tray is laid under the flammable and explosive gas pipeline and thermal pipeline. When there is no requirement in the design, the small sea distance between the cable tray and the pipe {head shall meet the requirements in the following table

(6)敷设在竖井内和穿越不同防火区的桥架，按设计要求位置，有防火隔堵措施

(6) The cable tray laid in the shaft and passing through different fire zones shall be provided with fire prevention and blocking measures according to the design requirements

(7)支架与预埋件焊接周定时，焊缝饱满；膨胀螺栓周定时，选用螺栓适配，连接紧同，防松零件齐全

(7) When the bracket and embedded parts are welded weekly, the weld is full; when the expansion bolt is welded weekly, the bolt is selected for matching, the connection is tight, and the anti loose parts are complete