Engineering FAQs

3. Fabrication and Erection Tolerances

The AISC Specification for Structural Steel Buildings, the Code of Standard Practice for Steel Buildings and Bridges, AWS D1.1, and other existing specifications and codes cover tolerance requirements for the fabrication and erection of structural steel. The FAQs in this section include a discussion of portions of these provisions and subsequent recommendations.

The structural steel fabrication industry has traditionally achieved a remarkable degree of dimensional accuracy in the fabrication and erection of steel structures. This is particularly evident when considering the variety and levels of skills essential to coordinate and perform the planning, detailing, fabrication, and erection of many unique and complex steel buildings, bridges, and other special structures.