Foshan Shengbang Steel Structure Co., Ltd. (for short "SBS") is a fast developing enterprise integrating marketing, design, development, manufacturing and construction. SBS has been approved and certified by international ISO9001: 2008 quality management system, and SGS factory system.
When the purlins span more than 5m should be in the purlin between the middle of the set bar. When the purlins span 7m should be in the purlin span three points to set a bar.
The effect of the pull is to prevent the purlin from being laterally deformed and twisted and providing an intermediate fulcrum in the x-axis direction. The force of the intermediate fulcrum needs to be transmitted to a larger member. For this purpose a stay and a stiff stay are required at the roof or cornice.