ASTM A992 is the standard specification for structural steel shapes used in building construction. Yield strength: 50 ksi minimum. Tensile strength: 65 ksi minimum. Carbon: 0.23% max. This replaced A36 (36 ksi) as the standard for W-shapes. Used for columns, beams, girders, and bracing in steel-framed buildings. Fire resistance: unprotected steel fails at approximately 1,000°F. Fire protection options: spray-applied fireproofing (SFRM), intumescent paint, concrete encasement, or gypsum board enclosure. Connection types: bolted (A325, A490 bolts) or welded (E70XX electrodes). Fabrication lead time: typically 8-16 weeks depending on market conditions and complexity.