Purlin ties

Roofing tie, tie is the steel frame between the round steel screw, including tie, string horizontal support, string horizontal support, oblique cross bar and so on. The main material is generally Q235 wire production, the diameter of M10, M12 is relatively common. The tension of the purlin is the horizontal load of the purlin. The layout of bracing bars should consider the influence of wind load, calculate the section of bracing bars according to the actual force, and meet the structural requirements.