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When designing a pinned beam connection with JOINTS, the design of the premature weld failure at the fin plate is decisive.
What exactly does the design of early weld failure take into account and does it have to be performed in every case?


This design or check is performed according to the ECCS.
It requires that the weld must not be decisive for the ultimate limit state of the connection. Thus, the ultimate limit state of the weld must be > the ultimate limit state of the fin plate.
If this check is not adhered to, you can either increase the weld thickness or reduce the thickness of the fin plate.
The design details show the minimum weld thickness with which the requirement is met.


Premature weld failure Fin plate


[1]   European Recommendations for the Design of Simple Joints in Steel Structures. ECCS - European Convention for Constructional Steelwork, Mem Martins, edition = 1. 2009.
[2]   Eurocode 3: Design of steel structures - Part 1-8: Design of joints; EN 1993‑1‑8:2005 + AC:2009

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Design of pinned joints according to Eurocode 3

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