COLD ROLL FORMED SQUARE STEEL PIPE POST AND STRUCTURE OF WELDING JOINT OF THROUGH-DIAPHRAGM

摘要

PROBLEM TO BE SOLVED: To provide a cold roll formed square steel pipe post and a structure of welding-joint of through-diaphragm capable of reducing the material cost for rolled steel by welding to join a through-diaphragm, which is formed of a rolled steel with a design strength lower than the design strength of a cold roll formed square steel pipe post, and the cold roll formed square steel pipe post, capable of reducing the welding cost by eliminating the labor hour for preheating in the welding work while increasing the productivity, resulting in a large reduction of construction cost.SOLUTION: In the welding joint structure between a cold roll formed square steel pipe post 1 and a through-diaphragm 2, the welding joint is carried out under the conditions that the design strength of the through-diaphragm 2 is lower than the design strength of the cold roll formed square steel pipe post 1.