Construction sequence of straight cable tray

Construction sequence of straight cable tray

In the process of straight cable trays construction: construction sequence, construction methods and technical measures, cable containment installation, grounding treatment, multi-layer cable trough (ladder cable tray, perforated cable tray,ventilated cable tray, cable duct ) cable tray installation, is usually the place where we are gate-keeping loose, this paper will briefly discuss such issues.

1. Construction sequence

Measurement and positioning-support hanger(Strut channel)  production and installation-cable tray installation-grounding.

2. Main construction methods and technical measures

1. Measurement and positioning

Use the bullet line method to mark the installation position of the cable trays, determine the fixed position of the bracket or unistrut or strut channel or c steel or u steel  or steel frame or steel profile and mark it well. The positioning of the cable tray in the shaft should first be determined by the suspended wire method to install the baseline, such as the reserved hole is not suitable, should be adjusted in time, and make a good repair.

2. Bracket or channel strut production and installation

According to the construction drawing design elevation and cable tray specifications, positioning, and then according to the measured size to make bracket or strut channel, bracket for factory production. In the place without suspended ceiling along the bottom of the beam or against the wall bracket installation, in the place with suspended ceiling bracket in the suspended ceiling or against the wall bracket installation. In public places without suspended ceilings, the brackets are installed against walls and columns or on the lower chord of the roof frame, taking into account the beauty of the building and the convenience of maintenance. The bracket installation against the wall is fixed with expansion bolts, and the distance between brackets does not exceed 2 meters. In the straight section and non-straight section connection, over the building deformation joints and bending radius of more than 300mm non-straight section should be installed in the middle of the additional support hanger, support hanger or steel strut channel installation should ensure that the cable trays level or verticality meet the requirements.