In the section with fire protection requirements, the cable ladder and tray can be added with fire-resistant or flame-retardant plates, nets and other materials to form a closed or semi closed structure, and measures such as painting fire-resistant coating on the surface of the bridge and its supports and hangers can be taken.

整體耐火性能應(yīng)滿足有關(guān)規(guī)范或標(biāo)準(zhǔn)的要求。在工程防火要求較高的場所.不宜采用鋁合金電纜橋架。

The overall fire resistance performance shall meet the requirements of relevant codes or standards. It is not suitable to use aluminum alloy cable tray in places with high fire protection requirements.

在使用橋架的時候需要掌握的知識

Knowledge to master when using bridge

當(dāng)電力電纜和控制電纜較少時,可同一電纜橋架安裝,但中間要用隔板將電力電纜和控制電纜隔開敷設(shè)。

When there are few power cables and control cables, they can be installed on the same cable tray, but the power cables and control cables shall be laid separately with a partition in the middle.

選擇電纜橋架寬度時應(yīng)留有備用空位，以便為今后增添電纜用。

When selecting the width of cable tray, spare space should be reserved for adding cables in the future.

電纜橋架裝置應(yīng)有可靠接地。如利用橋架作為接地干線，應(yīng)將每層橋架的端部用16mm2軟銅線聯(lián)接(并聯(lián))起來，與總接地干線相通，長距離的電纜橋架每隔30--50米接地一次。

The cable tray device shall be reliably grounded. If the cable tray is used as the grounding main line, the end of each layer of cable tray shall be connected (in parallel) with 16mm2 soft copper wire to connect with the main grounding main line, and the long-distance cable tray shall be grounded every 30-50m.

電纜橋架水平敷設(shè)時，橋架之間的連接頭應(yīng)盡量設(shè)置在跨距的1/4左右處,水平走向的電纜每隔2米左右固定一下，垂直走向的電纜每隔1.5米左右固定一下。

When the cable tray is laid horizontally, the connector between the cable trays should be set at about 1 / 4 of the span as far as possible. The horizontal cables should be fixed every 2 meters or so, and the vertical cables should be fixed every 1.5 meters or so.

電纜橋架裝置除需屏蔽裝保護(hù)罩外，在室外安裝時應(yīng)在其加裝保護(hù)罩，防止日曬雨淋，對如需焊接安裝時，焊件四周的焊縫厚度不得小于母材的厚度，焊口應(yīng)做防腐處理。

In addition to shielding and protective cover, protective cover shall be installed on the top layer of cable tray device during outdoor installation to prevent sunlight and rain. When welding and installation is required, the thickness of weld around the weldment shall not be less than that of base metal, and the weld joint shall be treated with anti-corrosion.

在橋架內(nèi)橫斷面的填充率：電力電纜不應(yīng)大于40%;控制電纜不應(yīng)大于50%,對于弱電線路可到60%。

The filling rate of the cross section in the cable tray: the power cable shall not be more than 40%; Control cable should not be more than 50%, for weak current lines can reach 60%.

上面是橋架的相關(guān)知識，希望能對您有所幫助，更多內(nèi)容可以直接關(guān)注：http://m.offroader.com.cn

The above is the bridge related knowledge, I hope it can help you, more content can be directly focused on: http://m.offroader.com.cn