Structural · S-M9TJF

Typical Beam-to-Column Flange Moment Connection

Materials

Steel

Elements

Columns Beams Connections / Plates

Connections

Moment Connection Base Plate / Anchorage Beam-to-Column Welded Connection Bolted Connection

About this detail

A typical steel beam-to-column flange moment connection features top and bottom flange stiffener plates matched in grade and thickness to the largest incoming beam flange. Complete joint penetration welds secure the beam flanges to the column, complemented by a bolted shear tab connecting the beam web. Stiffener plates are skewed as required when beams of varying depth frame into opposite sides of the column. Contractor options include utilizing a quarter-inch partial joint penetration weld at the top of the column or substituting a single cap plate fixed with five-sixteenth-inch one-sided fillet welds.

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