A lot of melted zinc plating is used for an outside steel frame. On the other hand, it is pointed out that the plating crack enters in the corner part when the cold forming corner type steel pipe is plated.
Here, the reproduction experiment of the plating crack was conducted with a real large cold forming corner type steel pipe for an architectural steel frame, and the method of preventing the plating crack was examined.
It proposes the following respect from these as a method of preventing the plating crack.
1.No plating processing is done to the corner part of the steel pipe, and melted zinc is not touched with the steel material.
2.The steel pipe for plating is made a manufactured steel pipe with the press.
3.The diaphragm is installed in the edge of the steel pipe, and thermal deformation is restrained.
