Structural · S-T3CNR

Typ. Weld Access Hole And Beam Cope

Scale: 1" = 1'-0"
Units: imperial
Discipline: Structural

Materials

Metal (misc.)

Elements

Columns Beams Reinforcing

Connections

Welded Connection

About this detail

This detail specifies the geometry and finishing requirements for weld access holes at beam-to-column flange connections. The access hole radius is defined as a minimum of 3/8 inch, with the horizontal length set to three times the beam flange thickness plus or minus 1/2 inch. The vertical height is the larger of the beam flange thickness or 1/2 inch, with specific tolerances for the bevel and groove weld preparation. Following the removal of the back-up bar, the area must be ground smooth and reinforced with a 5/16 inch minimum fillet weld at the top flange and a 1/4 inch minimum fillet weld at the bottom flange, ensuring the weld overlaps the beam flange cut. For heavy sections, specifically Group 4 and Group 5 rolled shapes, the access holes require preheating to 150 degrees Fahrenheit prior to thermal cutting, grinding to 500 microinches, and inspection via penetrant or magnetic particle testing.

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