Standard geometric parameters and fabrication requirements for weld access holes in structural steel beam webs and flanges feature a three-eighths inch minimum radius transition into the web, with a length proportional to the flange thickness and specified tolerances. Flange bevels must comply with AWS D1.1 standards for the selected groove weld procedure. Specifications govern cutting methods and smoothness requirements to prevent stress concentrations.
3tbf (±1/2") tbf 3tbf (±1/2") tbf LARGER OF tbf OR 1/2". (PLUS 1/2 tbf, OR MINUS 1/4 tbf) 3/4 tbf TO tbf, 3/4" MINIMUM (±1/4") 3/8" RADIUS MINIMUM BEVEL AS REQUIRED BY AWS D1.1 FOR SELECTED GROOVE WELD PROCEDURE. SEE SPECIFICATION FOR FABRICATION DETAIL INCLUDING CUTTING METHODS AND SMOOTHNESS REQUIREMENTS. LARGER OF tbf OR 1/2". (PLUS 1/2 tbf, OR MINUS 1/4 tbf) 3/4 tbf TO tbf, 3/4" MINIMUM (±1/4") 3/8" RADIUS MINIMUM BEVEL AS REQUIRED BY AWS D1.1 FOR SELECTED GROOVE WELD PROCEDURE. SEE SPECIFICATION FOR FABRICATION DETAIL INCLUDING CUTTING METHODS AND SMOOTHNESS REQUIREMENTS. TOP FLANGE BOTTOM FLANGE
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