Design of Moment Connection

Design of Moment Connection

Moment resisting connections are used in multi-storey un-braced buildings and in single-storey portal frame buildings. Connections in multi-storey frames are most likely to be bolted, full depth end plate connections or extended end plate connections. Where a deeper connection is required to provide a larger lever-arm for the bolts, a haunched connection can be used. 

However, as extra fabrication will result, this situation should be avoided if possible. For portal frame structures, haunched moment resisting connections at the eaves and apex of a frame are almost always used, as in addition to providing increased connection resistances, the haunch increases the resistance of the rafter. 

The most commonly used moment resisting connections are bolted end plate beam-to-column connections.

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