S960 Ultra-High Strength Steel Welded I-Section Structural Members provides detailed theoretical and experimental data on the key design provisions for ultra-high strength steel structures. Most of the current design provisions for high strength steel welded I-section components with material grades up to S690 (or S700) have been developed by those for normal strength steel counterparts. The design parameters of S960 ultra-high strength steel structures - which are increasingly being used in structures - is out of their scope and this book addresses that omission.