Geometric parameters and dimensions for a beam web access hole, also known as a rathole, are detailed at a structural steel column flange connection. The preparation features a beveled edge for the selected groove weld, with a minimum radius of three-eighths of an inch at the termination point. Dimensional tolerances are specified based on the flange thickness, designated as tbf, including length restrictions and bevel angles up to twenty-five degrees maximum.
3 3/8" 6 3/8" t bf 25.0° 1" 45.0° BEVEL AS REQUIRED FOR SELECTED GROOVE WELD. LARGER OF tbf OR 1/2" (+1/2tbf, -1/4tbf) FROM 3/4tbf TO tbf; 3/4" MINIMUM 3/8" MIN. RADIUS 3tbf (+/-1/2") 25° MAXIMUM 1 t bf 6 3/4" 1" 1 7/8" 3 3/8" 45.0° 2 3 4 5 6 1 1 2 2 3 3 4 4 5 5 6
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