Technical preparation:

（1）按照已批準(zhǔn)的施工組織設(shè)計(jì)（施工方案）進(jìn)行技術(shù)、交底。

(1) Conduct technical and safety disclosure in accordance with the approved construction organization design (construction plan).

（2）施工執(zhí)行工藝標(biāo)準(zhǔn)、圖集、規(guī)范齊全。

(2) The construction execution process standards, atlases, and specifications are complete.

（3）電纜橋架敷設(shè)前，應(yīng)檢查橋架敷設(shè)有無(wú)與其他設(shè)備、管線(xiàn)交叉或重疊無(wú)法施工的地方，施工前應(yīng)與各工種、監(jiān)理或建設(shè)單位及設(shè)計(jì)單位協(xié)商好，并作好記錄，以保證施工順利進(jìn)行。

(3) Before laying the cable tray, check whether there is any place where the cable bridge laying crosses or overlaps with other equipment and pipelines and cannot be constructed. Before construction, negotiate with each type of work, the supervisor, the construction unit and the design unit, and make records to ensure the smooth construction.

（4）根據(jù)施工圖或施工所用電纜應(yīng)作好電纜牽引力的計(jì)算。

(4) According to the construction drawings or cables used in construction, the calculation of cable traction force should be done.

電纜橋架規(guī)格及型號(hào)必須符合設(shè)計(jì)要求，附件齊全；橋架與配件、附件和緊固件各種型鋼均應(yīng)采用鍍鋅標(biāo)準(zhǔn)件。

The specification and model of cable tray must meet the design requirements, with complete accessories; All types of steel sections for bridge and accessories, accessories, and fasteners should be galvanized standard parts.

各種規(guī)格電纜橋架的直線(xiàn)段、彎通、橋架附件及支、吊架立柱及型鋼等有產(chǎn)品合格證，橋架內(nèi)外應(yīng)光滑平整，無(wú)棱刺，不應(yīng)有扭曲翹邊等變形現(xiàn)象。

The straight sections, bends, cable tray accessories, supports and hangers, columns and profile steel of various specifications of cable tray shall be provided with product certificates. The inside and outside of the cable tray shall be smooth and flat without burrs, distortion, edge warping and other deformation phenomena.

橋架訂貨或制作應(yīng)按設(shè)計(jì)要求進(jìn)行，不應(yīng)有誤，應(yīng)反復(fù)校核以免造成浪費(fèi)。

The ordering or production of the bridge should be carried out according to the design requirements, and there should be no errors. It should be repeatedly checked to avoid waste.

橋架安裝選擇需屏蔽電氣干擾的電纜回路，有腐蝕的場(chǎng)所、易燃粉塵場(chǎng)所，應(yīng)選用無(wú)蓋無(wú)孔封閉型托盤(pán)，當(dāng)需要因地制宜的場(chǎng)所，宜選用組裝式托盤(pán)或有孔托盤(pán)及梯架；在容易積灰和其它需遮蓋的環(huán)境或戶(hù)外場(chǎng)所，宜帶有蓋板。低壓電力電纜與控制電纜共用同一托盤(pán)或梯架時(shí)，應(yīng)選用中間有隔板的托盤(pán)或梯架；在托盤(pán)、梯架分支、引上、引下處應(yīng)設(shè)適當(dāng)?shù)膹澩ǎ灰蚴芸臻g條件限制不便裝設(shè)彎通或有特殊要求時(shí)，可選用軟連接板，鉸接板；伸縮縫應(yīng)設(shè)置伸縮板；連接兩段不同寬度或高度的托盤(pán)、梯架可配置變寬或變高板。但在施工中，支、吊架和橋架的選擇應(yīng)依設(shè)計(jì)或工程布置條件選擇。

Cable trays should be installed in cable circuits that need to be shielded from electrical interference. In areas with corrosion or flammable dust, closed trays without covers or holes should be selected. When local conditions are required, assembled trays or perforated trays and ladders should be selected; In environments or outdoor areas that are prone to dust accumulation and require covering, it is advisable to have a cover plate. When low-voltage power cables and control cables share the same tray or ladder, a tray or ladder with a partition in the middle should be selected; Appropriate bends should be set up at the branches, leads up, and leads down of trays and ladders; When it is not convenient to install bends due to space limitations or there are special requirements, soft connection plates or hinged plates can be used; Expansion joint shall be provided with expansion board; Connecting two trays or ladders with different widths or heights can be configured with widened or raised boards. However, in construction, the selection of supports, hangers, and cable trays should be based on design or engineering layout conditions.

托盤(pán)、梯架的寬和高度，應(yīng)按下列要求選擇:

The width and height of trays and ladders should be selected according to the following requirements:

(1)電纜在橋架內(nèi)的填充率，電力電纜不應(yīng)大于40%；控制電纜不應(yīng)大于50%。并應(yīng)留有一定的備用空位，以便今后為增添電纜用；

(1) The filling rate of cables in the bridge should not exceed 40% for power cables; The control cable should not exceed 50%. And a certain amount of spare space should be left for future use in adding cables;

(2)所選托盤(pán)、橋架規(guī)格的承載能力應(yīng)滿(mǎn)足規(guī)定。其工作均布荷載不應(yīng)大于所選托盤(pán)、梯架荷載等級(jí)的額定均布荷載；

(2) The bearing capacity of the selected tray and bridge specifications should meet the regulations. The working uniform load should not exceed the rated uniform load of the selected pallet and ladder load level;

(3)工作均布荷載下的相對(duì)撓度不宜大于1/200。

(3) The relative deflection under uniform working load should not exceed 1/200.

托盤(pán)、梯架直線(xiàn)段，可按單件標(biāo)準(zhǔn)長(zhǎng)度選擇。單件標(biāo)準(zhǔn)長(zhǎng)度一般規(guī)定為2、3、4、6m。托盤(pán)、梯架的寬度與高度常用規(guī)格尺寸系列如表2.4-1。

Tray and ladder straight sections can be selected according to the standard length of a single piece. The standard length of a single piece is generally specified as 2, 3, 4, and 6 meters. The commonly used specifications and dimensions for the width and height of trays and ladders are shown in Table 2.4-1.

注:符號(hào)△表示常用規(guī)格

Note: The symbol △ represents commonly used specifications

各類(lèi)彎通及附件規(guī)格，應(yīng)適合工程布置條件，并與托盤(pán)、梯架配套。

The specifications of various bends and accessories should be suitable for the engineering layout conditions and matched with trays and ladders.

支、吊架規(guī)格選擇，應(yīng)按托盤(pán)、梯架規(guī)格層數(shù)、跨距等條件配置，并應(yīng)滿(mǎn)足荷載的要求。

The selection of support and hanger specifications should be based on the specifications of trays, ladders, layers, spans, and other conditions, and should meet the load requirements.

鋼制橋架的表面處理方式，應(yīng)按工程環(huán)境條件、重要性、耐久性和技術(shù)經(jīng)濟(jì)性等因素進(jìn)行選擇。一般情況宜按表2.4-2選擇適用工程環(huán)境條件的防腐處理方式。當(dāng)采用表中“T”類(lèi)防腐方式為鍍鋅鎳合金、高純化等其它防腐處理的橋架，應(yīng)按規(guī)定試驗(yàn)驗(yàn)證，并應(yīng)具有明確的技術(shù)質(zhì)量指標(biāo)及檢測(cè)方式。

The surface treatment method of steel cable trays should be selected based on factors such as engineering environmental conditions, importance, durability, and technical economy. Generally, it is advisable to choose the anti-corrosion treatment method suitable for the engineering environmental conditions according to Table 2.4-2. When using the "T" type anti-corrosion method in the table, such as galvanized nickel alloy, high-purity and other anti-corrosion treatments, the bridge should be tested and verified according to regulations, and should have clear technical quality indicators and testing methods.