1、水平安装的桥架支架间距宜为 1.5m，垂直安装的桥架支架间距不应大于2m；

　　1. The spacing between horizontally installed bridge supports should be 1.5m, and the spacing between vertically installed bridge supports should not exceed 2m;

　　2、采用金属吊架固定时，圆钢或丝杆不得小于 8mm，并应有防晃支架，在分支处或端部 0.3-0.5m 处应有固定支架 ； 3、安装在地下室等潮湿场所的支架应按要求进行防腐处理；4、桥架支架按要求作倒角处理；桥架支架应在地下室横向、纵向区 域与消防管道及风管支架一条线布置确保美观、整齐；5、桥架在走廊通道安装时，应在一侧预留大于等于 300mm 的空间用 于检修；验收节点1、金属线槽不应作为设备接地导体，当设计无要求时，金属线槽全 长不少于 2 处与 PE 线连接，镀锌线槽间的连接板的两端不跨接接地 线，但连接板两端不少于 2 个防松螺母或防松垫圈的连接固定螺栓； 桥架在变形缝处应安装伸缩节；槽架盖在变形缝处独立安装（长 300mm）；2、非镀锌电缆桥架间连接板的两端跨接铜芯导线或编织铜线小截 面积不小于 4mm?；当钢制电缆桥架直线长度超过 30m，铝合金电缆桥 架超过 15m 时，或当电缆桥架经过建筑伸缩（沉降）缝时应留有20~30mm 补偿余量，其连接宜采用伸缩连接板；验收节点

　　2. When using metal hangers for fixation, round steel or threaded rods should not be less than 8mm and should have anti sway brackets. Fixed brackets should be provided at the branch or end 0.3-0.5m away; 3. Supports installed in damp places such as basements should undergo anti-corrosion treatment as required; 4. The bridge bracket shall be chamfered as required; The bridge bracket should be arranged in the horizontal and vertical areas of the basement along the same line as the fire and air duct brackets to ensure aesthetics and neatness; 5. When installing cable trays in corridors, a space of 300mm or more should be reserved on one side for maintenance; Acceptance node 1: Metal trunking should not be used as a grounding conductor for equipment. When there are no design requirements, the total length of the metal trunking should be connected to the PE line at least 2 places. The two ends of the connecting plate between galvanized trunking should not be crossed with grounding wires, but there should be no less than 2 fixing bolts with anti loosening nuts or anti loosening washers at both ends of the connecting plate; Expansion joints should be installed at the deformation joints of the bridge frame; The slot frame cover is installed independently at the deformation joint (300mm long); 2. The minimum cross-sectional area of the copper core wire or braided copper wire that crosses the two ends of the connecting plate between non galvanized cable trays shall not be less than 4mm ?; When the straight length of steel cable trays exceeds 30m, aluminum alloy cable trays exceed 15m, or when cable trays pass through building expansion (settlement) joints, a compensation allowance of 20-30mm should be left, and expansion connection plates should be used for their connections; Acceptance nodes

　　1、金属电管应与电缆桥架进行可靠的跨接接地；地下室风管距离墙柱宜为 0.8-1.0m 便于桥架翻越风管；2、桥架与风管交叉时，应从风管上方翻越；桥架与水管交叉时应从 水管上方翻越；严禁桥架从防火卷帘上方穿越；强弱电桥架间距应不 小于 0.3m；桥架与水管同行安装其间距应不小于 0.3m；3、桥架支架通长扁钢敷设确保桥架支架、桥架接地可靠；桥架支架 与桥架采用软线联结验收节点

　　1. Metal conduits should be reliably grounded across cable trays; The distance between the basement air duct and the wall column should be 0.8-1.0m to facilitate the bridge to climb over the air duct; 2. When the bridge intersects with the air duct, it should be flipped over from above the air duct; When the bridge intersects with the water pipe, it should be flipped over from above the water pipe; It is strictly prohibited for cable trays to pass over fire-resistant rolling shutters; The distance between the strong and weak bridge frames should not be less than 0.3m; the distance between the bridge frame and the water pipe when installed together should not be less than 0.3m; 3. The laying of the full-length flat steel of the bridge frame support ensures reliable grounding of the bridge frame support and bridge frame; The bridge bracket and bridge are connected by flexible wires for acceptance nodes

　　1、桥架安装前根据管线深化确定的标高，应在混凝土及砖墙上预留桥架孔洞（预留洞尺寸：桥架长+50mm，桥架宽+50mm）2、地下室强弱电桥架穿越相邻防火分区，依据建筑防火规范，需对 桥架穿墙洞口处进行防火封堵；

　　1. Before installing the cable tray, according to the elevation determined by the deepening of the pipeline, cable tray holes should be reserved on the concrete and brick walls (reserved hole size: cable tray length+50mm, cable tray width+50mm). 2. When the strong and weak electrical cable tray in the basement passes through adjacent fire compartments, according to the building fire protection regulations, the openings of the cable tray through the wall should be sealed for fire protection;

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