The objective is to study welding management for large steel structure construction in main terminal building of
Suvarnabhumi airport project. The large steel structure divided into two parts, Super Truss and Pylon. Both structures are fabricated
by the steel plate to weld and form according to the desired shapes following AWS D 1.1. The steel plates ASTM A572 Grade50
material with a thickness of 15 mm to 90 mm are used. The study of welding management principle comprises of reviewing
technical contract, jointing design, welding procedure specification, inspection and quality assurance. This study will lead to the
analytical of the most important point of each process and will be the guideline of welding management in the high scale project of