Structural · S-5A3MJ

Detail - Weld Access Hole

Materials

Connections

About this detail

A structural steel weld access hole, commonly known as a rat hole, is detailed with specific geometric requirements and dimensional limits based on flange thickness. The flange is beveled as required by AWS D1.1 for the selected groove weld procedure. The access hole features a minimum radius of three-eighths of an inch with no notches or gouges allowed, and a surface roughness not exceeding 0.0005 inches. Dimensional tolerances specify the distance from the web-to-flange intersection, the length of the access hole, and the depth past the weld line relative to the flange thickness.

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