Structural · S-PH4CN

Typical Moment Connetion At Beam To Column

Materials

Elements

Columns Beams Bracing Connections / Plates Roof / Floor Openings

Connections

Moment Connection Braced Frame Connection Shear Tab / Single Plate Beam-to-Column Bracing Connection Welded Connection Bolted Connection

About this detail

This structural steel moment connection detail joins a steel beam to a braced frame column using complete joint penetration groove welds at the top and bottom flanges combined with a bolted web shear tab. The shear tab is sized to match the thickness of the beam web minus one-sixteenth of an inch and utilizes three seven-eighths-inch diameter erection bolts, with fillet welds omitted from the middle third of the plate on each side. The top and bottom flange connections feature weld access holes and allow for either complete joint penetration groove welds with the weld backing removed, back gouged, and inspected with a five-sixteenth-inch minimum fillet weld added, or leaving the backing in place at the bottom flange and adding a five-sixteenth-inch fillet weld. Weld tabs are required for the complete joint penetration flange welds, to be removed to within one-eighth of an inch of the base metal and ground smooth after welding. Web stiffeners are provided inside the column when required by the brace supplier. The construction sequence specifies tightening erection bolts snug, welding the top and bottom flanges, and finally welding the beam web.

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