Determine the direction: according to the construction plan, contact the setting of air conditioning pipeline and electrical pipeline, convenient maintenance, and the tightness of cable wiring to determine the best route of cable tray. Indoor, as far as possible along the walls, columns, beams and floors of the building, how to use the general pipe gallery should be set in parallel on one side or above of the pipe, and consider the downward and branch lines to avoid insertion as far as possible. If there is no other pipe frame to borrow, it is necessary to establish (Branch) columns.

1.電纜橋架作為布線(xiàn)工程推廣的支撐項目，沒(méi)有專(zhuān)門(mén)的規范教學(xué)，廠(chǎng)家的規范程序缺乏通用性。因此，在方案選擇過(guò)程中，應根據各系統弱電流電纜的類(lèi)型和數量，合理選擇合適的電橋。

1. As a supporting project of wiring engineering promotion, cable tray has no special standard teaching, and the manufacturer's standard procedure is lack of universality. Therefore, in the process of scheme selection, the appropriate bridge should be selected reasonably according to the type and number of weak current cables in each system.

主要內容如下：(1)根據施工方案確定電纜橋架的佳線(xiàn)路，聯(lián)系空調管道和電力管道的設置條件，方便檢修，確定電纜線(xiàn)路的密度。在室內，盡可能沿建筑物的墻壁、柱、梁和地板，如何使用一般的管道廊，應在管道一側或以上平行設置，并考慮引向和支路，盡量避免插入，如果沒(méi)有其他管架借來(lái)，就必須建立(分支)柱。

The main contents are as follows: (1) according to the construction scheme to determine the best line of cable tray, contact the air conditioning pipeline and power pipeline setting conditions, convenient maintenance, determine the density of cable line. Indoor, as far as possible along the wall, column, beam and floor of the building, how to use the general pipe gallery, should be set in parallel on one side or above the pipe, and consider the direction and branch, try to avoid insertion, if there is no other pipe frame borrowed, it must establish (Branch) column.

(3)確定橋梁寬度：根據索條數、索徑和索間距確定電纜橋架的類(lèi)型和規格、臂長(cháng)、柱的長(cháng)度和間距、橋面的寬度和層數。

(3) Determine the bridge width: according to the number of cables, cable diameter and cable spacing, determine the type and specification of cable bridge, arm length, column length and spacing, bridge deck width and number of layers.

(4)確定設備的措施：根據場(chǎng)所的設置條件，確定橋梁的固定方法，選擇懸索式、立式、側壁式或混合型，并普遍提供連接件和緊固件配合使用。此外，根據所述橋梁結構選擇相應的蓋板。

(4) Measures to determine the equipment: according to the setting conditions of the site, determine the fixing method of the bridge, select the suspension type, vertical type, side wall type or mixed type, and generally provide connectors and fasteners for use. In addition, the corresponding cover plate is selected according to the bridge structure.

3.在其他低壓電纜橋接中使用弱電流電纜時(shí)，應嚴格選擇具有外屏蔽層的弱電流電纜，以避免彼此間的干擾。

3. When using weak current cable in other low voltage cable bridging, the weak current cable with outer shielding layer should be strictly selected to avoid mutual interference.

靜載是指敷設在電纜橋架中的電纜類(lèi)型、根數、各外徑/單位長(cháng)度的重量，根據不同的電纜敷設路線(xiàn)分離列表計算。

Static load refers to the type, number and weight of each outer diameter / unit length of cables laid in the cable tray, which is calculated according to the separate list of different cable laying routes.