電纜橋架撓度值如何取定，目前尚無明確的規(guī)定，在重負區(qū)顯然應考慮減小繞度，這意味著鋼材的用量會相應增加，因此，計算時只要充分利用鋼材的大允許應力，并保證有足夠的系數(shù)，一般大撓度與跨距(支撐點間距)之比取1/250~1/150為宜。

At present, there is no clear regulation on how to determine the deflection value of cable tray. Obviously, it should be considered to reduce the deflection in the heavy load area, which means that the amount of steel will increase accordingly. Therefore, as long as the large allowable stress of steel is fully used and sufficient safety factor is ensured, the ratio of large deflection to span (spacing between support points) should be 1/250~1/150.

集中荷載和均布荷載的彎距按大彎距相等的條件折算：令pι/4=q2ι2/8則q2=2p/ι∵P=90kg∴q2=180/ι式中：P--1人的荷載(kg)ι--1個支撐點間距(若支點間距不等時取大值)(m)q2--1人的等效均布荷載(kg/m)根據上述初步確定的橋架型號、規(guī)格及支點間距，查閱橋架生產廠家的樣本資料，反復核查間距和橋架型號，直滿足負荷要求為止。

The bending moment of concentrated load and uniformly distributed load is converted according to the condition that the large bending moment is equal: let p ι/ 4=q2 ι 2/8 then q2=2p/ ι ∵P=90kg∴q2=180/ ι Where: P -- load of 1 person (kg) ι-- The spacing of one support point (the greater value if the fulcrum spacing is different) (m) Q2 -- the equivalent uniformly distributed load of one person (kg/m). According to the above preliminarily determined bridge model, specification and fulcrum spacing, consult the sample data of the bridge manufacturer, and repeatedly check the spacing and Bridge model until the load requirements are met.

濟南電纜橋架由室外進入建筑物內時，橋架向外的坡度不得小于1/100。電纜橋架與用電設備交越時，其間的凈距不小于0.5m。橋架支撐點，如立柱、托臂或非標準支、構架的間距、安裝方式、型號規(guī)格、標高，可同意在平面上列表說明，也可分段標出用不同的剖面圖、單線圖或大樣圖表示。

When Jinan cable tray enters the building from the outside, the outward slope of the tray shall not be less than 1/100. When the cable tray crosses the electric equipment, the clear distance between them shall not be less than 0.5m. The spacing, installation mode, model, specification and elevation of bridge support points, such as columns, corbels or non-standard supports and frames, can be listed on the plan, or marked in sections and represented by different sectional drawings, single line diagrams or detailed drawings.

電纜橋架引下點位置及引下方式，一般而言，大批電纜引下可用垂直彎接板和垂直引上架，少量電纜引下可用導板或引管，注明引下方式即可。特殊部件如垂直彎接板，轉彎接板等則需分別統(tǒng)計。

Generally speaking, a large number of cables can be led down with vertical bending plates and vertical lead-in racks, and a small number of cables can be led down with guide plates or lead pipes, indicating the way of leading down. Special components such as vertical bending plate and turning plate shall be counted separately.

此外橋架接線時的安裝標準要多了解，比如將電纜橋架水平放置時，應根據負載量選擇支撐柱(固定)之間的時間間隔為1.5-3m。固定的垂直數(shù)據不應超過2m。托盤與地面的間距通常應不少于2.5m，垂直放置時，其間距應不少于1.8m。應該使用蓋子來保護不夠高的托盤。

In addition, the installation standards for cable tray wiring should be understood. For example, when the cable tray is placed horizontally, the time interval between support columns (fixed) should be selected as 1.5-3m according to the load. The fixed vertical data shall not exceed 2m. The distance between the tray and the ground shall not be less than 2.5m generally, and when placed vertically, the distance shall not be less than 1.8m. Covers should be used to protect trays that are not high enough.

拆卸和安裝多層時，上托盤距離上(天花板)板不小于0.3m。電纜可以在托盤中無間隙地放置，但不允許彼此絞合。托盤中的填充率不應超過橫截面的40。不同電源的電源線;請勿將電壓等級不同的電源線放在統(tǒng)一的托架中。

When removing and installing multiple layers, the distance between the upper tray and the upper (ceiling) plate shall not be less than 0.3m. Cables can be placed without gaps in the tray, but it is not allowed to twist each other. The filling rate in the tray shall not exceed 40% of the cross section. Power lines of different power supplies; Do not put power cords with different voltage levels in a unified bracket.

敷設在濟南電纜橋架橋梁上的電纜應標明電纜編號，型號規(guī)格，長度，起點和終點等。在起點，終點和每50m。橋梁沿線穿過建筑伸縮縫時，一定要分為幾段(100毫米)。金屬橋架一定要具有良好的接地連接(零連接)。

Cables laid on Jinan cable bridge shall be marked with cable number, model, specification, length, starting point and ending point, etc. At the start, end and every 50m. When the bridge passes through the building expansion joint, it must be divided into several sections (100mm). The metal bridge must have good grounding connection (zero connection).

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