電纜橋架由室外進入建筑物內(nèi)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(gòu)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 the cable bridge comes into the building from outside, the slope of the bridge shall not be less than 1/100. When the cable bridge is crossed with the electrical equipment, the net spacing between them is not less than 0.5m. Bridge support points, such as columns, brackets or non-standard supports, spacing between frames, installation methods, model specifications, elevation, can be agreed to be listed in the plane, but also can be marked in sections with different sections, single-line drawings or protracted graphs.

電纜橋架表示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(jù)上述初步確定的橋架型號、規(guī)格及支點間距，查閱生產(chǎn)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 distances of cable bridges representing concentrated loads and uniformly distributed loads are converted according to the condition that the maximum bending distances are equal: if p/4=q2_2/8, then q2=2p/_P=90kg_q2=180/_, the load (kg) of P--1 person_--the maximum spacing of one supporting point (m) q2--1 person's equivalent uniformly distributed load (kg/m) is determined according to the above preliminary results. The type, specification and fulcrum spacing of the bridge are fixed, and the sample data of the manufacturer are consulted. The spacing and type of the bridge are checked repeatedly until the load requirements are met.

電纜橋架撓度撓度值如何取定，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。

There is no definite stipulation on how to determine the deflection value of cable bridge frame. It is obvious that the reduction of the winding should be considered in the load-bearing area, which means that the amount of steel will increase correspondingly. Therefore, the calculation should make full use of the maximum allowable stress of steel and ensure sufficient safety factor, generally the maximum deflection and span (support). The ratio of point spacing to 1/250~1/150 is appropriate.

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(zhuǎn)彎接板等則需分別統(tǒng)計。

Generally speaking, a large number of cables can be pulled down by vertical bending plate and vertical pulling up frame, and a small number of cables can be pulled down by guide plate or pipe, indicating the way of pulling down. Special components such as vertical bending plate and turning connecting plate need to be counted separately.

 

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