Aisc 325 Steel Construction Manual May 2026

Most building codes in the United States (IBC, ASCE 7) legally adopt ANSI/AISC 360 by reference. The AISC 325 manual is the primary vehicle for that specification. If you design a steel beam, column, or connection, your design is not code-compliant unless it adheres to the rules within the AISC 325 Steel Construction Manual.

The primary goal of the Manual is to assist in the design of steel structures by consolidating necessary data into a user-friendly format. It bridges the gap between theoretical structural analysis and practical construction. While the Manual provides the tools for design (tables, formulas, and graphs), it refers to the AISC 360 Specification for the governing rules and requirements. aisc 325 steel construction manual

It is used by three primary groups:

The holy trinity of member design. Each part walks you through limit states: yielding, rupture, block shear (tension); flexural buckling, torsional buckling (compression); and lateral-torsional buckling, flange local buckling (flexure). Most building codes in the United States (IBC,

Avoid these pitfalls that plague young engineers: The primary goal of the Manual is to

Software excels at frame analysis but struggles with connection design—especially bolted and welded moment connections. Part 9 of the AISC 325 manual (Design of Connections) provides step-by-step design procedures, all pre-qualified by decades of research. No commercial software can replace the manual’s tables for weld groups, bolt capacities, and prying action.