In 1988 the American Institute of Steel Construction changed the method from Allowable Stress Design (ASD) to Load Resistance Factor Design (LRFD) on which the building code is based. This text develops a treatment of steel which is behavior--oriented and explains the causation for the LRFD approach. Focuses on creating cost--effective solutions for designing situations efficiently; discusses problems engineers must face on a regular basis; and offers insight into potential areas of concern. Also covers earthquake resistant design procedure. Includes over 400 drawings and 36 photos.