Generally, the maximum length of the socket rack shall not exceed 8m, and the width shall not exceed1m.. According to the key points of safe operation of the socket rack, the socket rack shall not exceed two bays of the building, the longest shall not exceed 8 meters, and the width shall not exceed 1 meter. For the socket rack assembled with steel pipes, the distance between vertical poles shall not be more than 2m, and diagonal braces shall be set on the large and small surfaces. For welded socket-type frames, the spacing between vertical poles shall not be greater than 2.5m, and scissors shall be set on the bedding surface.