(1) Snap line positioning

根据设计图确定出进户线、盒、箱、柜等电气器具的安装位置从始端终端(先干线后支线)找好水平或垂直线用粉线袋沿墙壁、顶棚和地面等处在线路的线进行弹线按照设计图要求及施工验收规范规定分匀档距并用笔标出具体位置如果支吊架固定位置有与顶板预应力肋梁冲突处应避开肋梁位置。

According to the design drawing, determine the installation position of electrical appliances such as incoming lines, boxes, boxes, and cabinets from the beginning to the end (starting with the main line and then the branch line). Find horizontal or vertical lines and use a chalk bag to snap the lines along the centerline of the wall, ceiling, and ground. Divide the span according to the design drawing requirements and construction acceptance specifications, and mark the specific position with a pen. If there is a conflict between the fixed position of the support and hanger and the prestressed rib beam of the top plate, avoid the rib beam position.

桥架安装技术交底 施工要点

Key points for technical disclosure of bridge installation construction

（2）支吊架安装

(2) Installation of supports and hangers

在确定支吊架的位置时应符合设计规定当设计无明确规定时也可按生产厂家提供的产品特性数据确定。

When determining the position of the support and hanger, it should comply with the design regulations. If there are no clear regulations in the design, it can also be determined based on the product characteristic data provided by the manufacturer.

电缆桥架水平敷设时支撑跨距一般为1.5~2m。

When the cable tray is horizontally laid, the support span is generally 1.5~2m.

电缆桥架垂直敷设时固定点间距不宜大于2m。

When laying cable trays vertically, the spacing between fixed points should not exceed 2m.

支架与吊架在安装时应挂线或弹线找直用水平尺找平以保证安装后横平竖直。

During the installation of brackets and hangers, lines should be hung or snapped for alignment, and a horizontal ruler should be used to ensure horizontal and vertical alignment after installation.

非直线段的支、吊架位置见图1桥架弯通或三通、四通弯曲半径不大于300mm时

The positions of supports and hangers for non linear sections are shown in Figure 1. When the bending radius of the bridge bend, tee, or cross is not greater than 300mm

应在距弯曲段与直线段接合处300~600mm的直线段侧设置一个支吊架。当弯曲半径大于300mm时还应在弯通中部增设一个支、吊架。

A support and hanger should be installed on the side of the straight section at a distance of 300-600mm from the junction of the curved section and the straight section. When the bending radius is greater than 300mm, a support and hanger should also be added in the middle of the bend.

桥架安装技术交底 施工要点

Key points for technical disclosure of bridge installation construction

桥架吊架安装

Bridge hanger installation

当电缆桥架水平悬吊安装时一般使用双圆钢吊架和角钢、槽钢吊架安装.圆钢吊杆的角钢、槽钢的规格长度.视工程设计或实际需要选用。

When the cable tray is horizontally suspended and installed, double round steel hangers and angle steel and channel steel hangers are generally used for installation. The length of the angle steel and channel steel specifications of the round steel hanger rod depends on the engineering design or actual needs.

桥架安装技术交底 施工要点

Key points for technical disclosure of bridge installation construction

电缆桥架支、吊架调整

Adjustment of cable tray supports and hangers

电缆桥架安装中对桥架的支、吊架位置误差应严格控制。电缆桥架支、吊架应安装牢固横平竖直。托臂及支、吊架的同层横档应在同一水平面上其高低偏差不应大于5mm.防止纵向偏差过大使安装后的托盘、梯架在支、吊点悬空而不能与支、吊架或托臂直接接触;桥架支、吊架或托臂沿桥架走向左右偏差不应大于10mm.支、吊架或托臂的横向偏差过大可能会使相邻托盘、梯架错位而无法连接或安装后的电缆桥架不直而影响美观。

During the installation of cable trays, the position error of supports and hangers should be strictly controlled. Cable tray supports and hangers should be installed firmly, horizontally and vertically. The horizontal bars of the same layer of the support arm and support and hanger should be on the same horizontal plane, and their height deviation should not exceed 5mm. To prevent excessive longitudinal deviation, the installed tray and ladder should be suspended at the support and hanger points and cannot directly contact the support, hanger or support arm; The deviation of the bridge support, hanger, or bracket along the direction of the bridge should not exceed 10mm. Excessive lateral deviation of the support, hanger, or bracket may cause adjacent trays or ladders to be misaligned and unable to be connected, or the installed cable tray may not be straight and affect aesthetics.