Patent ID: 8517247
Filing Date: 2013-08-27
Classification: B23K,E04B,E04C

Abstract:
1. A method for manufacturing a beam, comprising: connecting a middle web plate to a bottom flange and a top flange to form a jig beam, by welding the middle web plate at least at a first point to the bottom flange and at least at a second point to the top flange; connecting a first side web plate to a first edge of the jig beam, and at a distance from the first side web plate on an opposite, second edge of the beam a second side web plate by welding the first side web plate at least at a third point to the bottom flange and at least at a fourth point to the top flange and by welding the second side web plate at least at a fifth point to the bottom flange and at least at a sixth point to the top flange; measuring energy input into the first through sixth points; and using a value obtained during the energy measurement to adjust an amount of energy input to the first through sixth points during the connection and after the measurement.