The welds of the column end plate are very small. How can this be justified?

Answer

From the formula of EC 3-1-8, it is obvious that the ultimate tension forces of the beam's end plate are introduced into the column flange and thus directly into the column web.
Therefore, the upper end plate is not fully stressed by these forces.
For purely structural reasons, the column end plate is available for the stiffening and the panel boundary and serves for the transmission of the proportional force flowing into the stiffener in case of a required diagonal stiffener.

Keywords

Weld Column end plate End plate of column Column flange Column web

Reference

[1]   Eurocode 3: Design of steel structures - Part 1-8: Design of joints; EN 1993‑1‑8:2005 + AC:2009

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