An extended end plate steel connection is a type of moment connection that uses a steel plate welded to the end of a beam section to transfer forces between the beam and an adjacent member. The end plate extends beyond the beam flanges, allowing for the use of bolts other than between the flanges.
ESDEP LECTURE NOTE [WG14]
Simple connections
Steel Connection - End Plate Dimensions & Drawings
Behaviour of bolted end-plate connections to concrete-filled steel columns - ScienceDirect
Steel Connection - End Plate Dimensions & Drawings
Steel Connection - End Plate, Extended Dimensions & Drawings
Behavior of Extended End-Plate Steel Beam to Column Connections
Base Plate Connections (AISC)
Moment resisting connections