A few notes about the installation of cable trays:

(1). Visual inspection

When the cable tray enters the construction site, the following materials should be submitted to the factory, the product quality certificate, the periodic inspection report of the provincial and municipal quality supervision station, and the relevant technical identification documents. The thickness of the cable tray plate should meet the relevant requirements. The coating surface of the hot-dip galvanized cable bridge should be uniform without defects such as over-burning, ash hang, and local ungalvanized. Electrostatic spraying should be flat, smooth, uniform, skinless, no bubbles, blister bridge itself should be flat, without distortion, the inner wall should be smooth, no burrs, the weld surface of the bridge should be uniform, no leakage, cracks, burn-through, etc. defect.

(2). Installation position of cable bridge

When the bridge is laid horizontally, the height from the ground should generally not be less than 2.5m. When laying multiple layers of the bridge, in order to dissipate heat, maintain and prevent interference, a certain distance should be left between the layers of the bridge. When the cable bridge is laid in parallel with various pipelines, its clear distance should meet the relevant regulations.

(3). Installation of support and hanger

The quality of the support and hanger of the cable bridge should conform to the current relevant technical standards. When the cable bridge is laid horizontally, the support span is generally 1.5 ~ 3m. When trying vertical laying, the fixed distance should not be greater than 2m. The horizontal height difference between the two adjacent bridge support arms Should not be greater than 10mm, the vertical deviation of the vertical centerline of the two adjacent bridge support arms should not be greater than 20mm.