Elevator trunking operation process (1)

Elastic line positioning
According to the design drawing, determine the installation position of the electrical equipment such as the incoming line, box, box, cabinet, etc., from the beginning to the end of the trunk, the rear branch line, find the horizontal or vertical, use the powder line bag along the wall, ceiling and ground, etc. The center line is used to carry out the elastic line. According to the design drawing requirements and the construction acceptance specification, the span distance is divided and the specific position is marked with a pen.