Aluminum cable tray, InfoQuick bridge electrical equipment, aluminum cable tray which is provided by InfoQuick bridge electrical equipment. Aluminum cable tray _ InfoQuick bridge electrical equipment _ aluminum cable tray Xinzheng, Henan InfoQuick bridge where there is a complete electrical equipment Co., Ltd. (www.jtqiaojia.com) 2014 upgrade been newly launched distribution boxes, cable tray shaft groove type cable tray, tray cable tray, Ladder type cable tray, DJ-type large span cable tray, CABLOFIL mesh cable tray, hot dip galvanized cable trays, stainless steel cable tray, aluminum cable tray, room alignment bridge, FRP cable tray, CSP alloy plastic cable tray, cable tray installation - Henan InfoQuick bridge voltage electrical equipment Co., wire cable tray fire exchange with steel casing, double fire cover, built-in fireproof compartment average thickness of the insulation. to 25mm, double cover ventilation Zhengzhou custom aluminum cable tray, the spray fire retardant paint, fire exchange line cable tray when a fire coatings swell, blocking the ventilation holes, the cable box to protect the slot. inorganic fire compartment fire performance by national fixed fire-resistant test center for 60 minutes fire resistance test, no damage to the cable. structural support, and can be effectively fixed inorganic fire compartment. distribution box, shaft cable trays, slotted cable tray, tray cable tray, cascade cable bridge, DJ-type large span cable tray, CABLOFIL mesh cable tray, hot dip galvanized cable trays, stainless steel cable tray aluminum cable tray manufacturer's web site, aluminum cable tray, aluminum cable tray room alignment bridge, FRP cable tray, CSP alloy plastic cable tray, cable tray installation - Henan InfoQuick bridge voltage electrical equipment Co., Ltd. due to ambient temperature changes which aluminum cable tray, steel cable tray will appear the phenomenon of thermal expansion and contraction. Outdoor bridge affected by temperature environment such as the maximum temperature is 40 ℃, the lowest temperature of -20 ℃, the maximum amount of shrinkage cable tray calculated by the following formula: Δt = 11.2 × 10-6 × 60deg (degrees) × 1000mm from the This concluded that: when the temperature difference is 60 ℃, Δι = 0.672mm / m difference in temperature is 50 ℃, Δι = 0.560mm / m difference in temperature is 40 ℃, Δι = 0.448mm / m engineering design should consider the straight section of cable tray expansion joints, expansion joints spaced take advice given by the following: When the temperature difference is 40 ℃ to 50m; to 40m when the temperature difference is 50 ℃; to 40m when the temperature difference at 60 ℃; grounded in accordance with the relevant provisions of InfoQuick bridge specification, galvanized cable tray be well grounded.