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AD 422: Punching shear check for fin plates in P358

September 13, 2018 by NSC in Advisory Desk, Technical
This AD note relates to Check 10 for fin plates in P358 Simple Joints to Eurocode 3 (the Eurocode “Green Book” on simple connections). Check 10 includes two checks for punching shear (conservative and rigorous), but the value of γM2 is not specified in the text. Confusion is possible because γM2 appears in both BS EN 1993-1-1 and BS EN 1993-1-8, but with different values (1.1 and 1.25 respectively, as given in the relevant UK National Annex).

Since the check does not concern the bolts or welds, but does concern the ultimate material strengths of the fin plate and supporting member, the value of γM2 should be taken as 1.1 from the UK NA to BS EN 1993-1-1.

Contact: Richard Henderson
Tel: 01344 636534

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