1、電纜橋架材質選擇

1. Material selection of cable tray

電纜橋架工程設計常見的問題就是電纜橋架如何按照材料劃分，一般分為玻璃鋼、鋼制和鋁合金這幾種。而玻璃鋼的電纜橋架的質量較輕，耐腐蝕性和耐水性好，適合于化工廠使用。質地不易燃燒，使用壽命長，一般設計壽命在20年左右，但方面比鋼制電纜橋架高3倍左右。施工的也非常方便，切割性強、容易組裝、安裝無需動火，對于化工廠這樣的工程非常實用。鋁合金電纜橋架也比較輕，荷載特性均與鋼質橋架基本相近。方便也比鍍鋅鋼制電纜橋架要高出20%，但是使用壽命是鋼制電纜橋架的5倍以上。

The common problem in cable tray engineering design is how to divide cable trays according to materials, generally divided into fiberglass, steel, and aluminum alloy. The quality of fiberglass cable trays is relatively light, with good corrosion and water resistance, making them suitable for use in chemical plants. The texture is not easy to burn, and the service life is long. The general design life is about 20 years, but the price is about three times higher than steel cable trays. Construction is also very convenient, with strong cutting ability, easy assembly, and installation without the need for hot work, making it very practical for projects like chemical plants. Aluminum alloy cable trays are also relatively light, and their load characteristics are basically similar to those of steel cable trays. The price is convenient and 20% higher than galvanized steel cable trays, but the service life is more than 5 times that of steel cable trays.

2、電纜橋架表面防腐層類別選擇

2. Selection of categories of anti-corrosion coatings on the surface of cable trays

電纜橋架表面的防腐層主要分為：鍍鋅鎳、冷鍍鋅、熱浸鋅、粉末靜電噴涂等方式。鍍鋅鎳工藝壽命不小于30年，造價高，也適用于室外重腐蝕環境;冷鍍鋅工藝壽命不小于12年，造價一般，適用于室外輕腐蝕環境;而熱浸鋅工藝壽命不小于40年，造價高，適用于室外重腐蝕環境;粉末靜電噴涂工藝壽命不小于12年，一般，比較適用于室內常溫干燥環境。所以，設計人員會根據工程環境條件等情況，來合理的選擇電纜橋架表面的防腐層類別，并在會清晰地表達在設計文件中。

The anti-corrosion layer on the surface of cable trays is mainly divided into methods such as galvanized nickel, cold galvanized, hot-dip galvanized, and powder electrostatic spraying. The galvanized nickel process has a lifespan of no less than 30 years, high cost, and is also suitable for outdoor heavily corrosive environments; The service life of the cold galvanizing process is not less than 12 years, the cost is average, and it is suitable for outdoor light corrosive environments; The hot-dip galvanizing process has a lifespan of no less than 40 years, high cost, and is suitable for outdoor heavily corrosive environments; The service life of the powder electrostatic spraying process is not less than 12 years, and the price is average, making it more suitable for indoor room temperature dry environments. Therefore, designers will reasonably choose the type of anti-corrosion coating on the surface of cable trays based on engineering environmental conditions and other conditions, and it will be clearly expressed in the design documents.