Extruded board and polystyrene board What is the difference
1 vertical horizontal bar should be set in the inside of the pole, the length of a single rod should not be less than 3 span; 2 vertical horizontal rod should be connected with the fastener connection or lap, and should meet the following requirements: 1) two adjacent longitudinal The joints of the horizontal bars should not be set in the same or cross-span; the distance from the two adjacent joints in the horizontal direction should not be less than 500mm; the distance from the center of the joint to the nearest main node should not be greater than the distance 1 / 3
), the construction of high-grade steel pipe scaffolding safety special construction program preparation points are as follows:
