A lot of people have such questions: how to deal with the friction surface of high-strength Roofing Bolts connection? If the large component requires local friction surface treatment, how to protect the treated friction surface?

Salt Yihui Answer: There are three processes: First, the wire brush by hand sanding, shot blasting treatment is two, three raw red rust is sandblasted, with the above treatment to protect fixed plywood, cardboard or the like with a simple point may protect the surface can not be there paint.

   These are commonly used high intensity Round Head Bolt connection processing method of the friction surface