Steel Tube Institute guide approved as standard for measuring HSS tolerances

“Methods to Check Dimensional Tolerances on Hollow Structural Sections,” a technical guide from the Steel Tube Institute (STI), Glenview, Ill., has been approved as the standard guide for measuring tolerances, according to the American Society for Testing and Materials (ASTM).

Available on the STI website, the educational resource details and illustrates the latest methods to measure tolerances of hollow structural sections (HSS) correctly. It also summarizes the dimensional tolerances allowed by ASTM A500, A847, and A1110, which is helpful for engineers and architects in detailing HSS projects.

The guide also can be used to verify tolerances for A1085, A1065, and other similar tubular specifications. It explains how to check tolerances for outside dimensions, wall thickness, length and straightness, squareness of sides, radius of corners, and member twist.