抄録
In truth, architectural fielding on field welding joint happen to heat-affected zone fracture outside of base metal fracture. This accident caused is affected that deformed bar happen to toe crack and heel crack more than root gap and welding arm of welding company. Heat-affected zone welding joint is A class joint. There are deviated base metal need A class joint but reality building, there are few think that heat-affected zone fracture affect in use structural resistance.
