... Steel Design Guide Series Torsional Analysis of Structural Steel Members Steel Design Guide Series Torsional Analysis of Structural Steel Members Paul A. Seaburg, PhD, PEHead, Department of ... single-angle members, the provisions of the AISC Specification for LRFD of Single-Angle Members and Specification for ASD of Sin-gle-Angle Members are appropriate. The design of curved members ... beyond the scope of this publication; refer to AISC ( 198 6), Liew et al. ( 199 5), Nakai and Heins ( 197 7),Tung and Fountain ( 197 0), Chapter 8 of Young ( 198 9),Galambos ( 198 8), AASHTO ( 199 3), and Nakai...