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Old 15th May 2015, 04:39 PM   #1
Colin Mitchell
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Join Date: Jul 2009
Posts: 33
Default EC5 Shear Strength / C24

Please see attached.

EuroBeam / BS EN 338 2009 Table 1 sets fv,k = 4.0 N/sq mm

IStructE / EC5 Manual 2007 Table 3.14 sets fv,k = 2.5 N/sq mm.

Are these fv,k's talking about the same thing?

If so why the seemingly big difference?

Best regards
C

Last edited by Colin Mitchell; 14th March 2017 at 12:39 PM.
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Old 18th May 2015, 07:25 AM   #2
Tony Bryer
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Default Re: EC5 Shear Strength / C24

Yes, same thing. As you correctly surmise, BS EN 338 was revised in 2009, significantly increasing grade shear strengths. We were slow in picking this up so the change didn't get incorporated into EuroBeam until release 1.41a, Feb 2015.

The change brings EC5 shear resistances much closer to BS5268 - as an example, 50x200 C24 has a shear resistance of 5.20kN using BS5268: this is unfactored, so around 7.6-7.8kN factored. Using the updated EN338 figure, permanent load, the corresponding EC5 figure is 8.25kN - previously it would have been 5.15kN.
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Old 22nd May 2015, 09:41 AM   #3
Colin Mitchell
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Default Re: EC5 Shear Strength / C24 / Strange Behaviour

Hello Tony,

If I open the .eub file from the Eurobeam File Menu the latest higher shear values are used.

If I open the .eub file by double clicking on it; it reverts to the earlier lower shear values.

Obviously I can work round this 'feature' but it was more then a little disconcerting the first time I encountered it.

I use a Toshiba/Qosmio laptop with Windows 8.1+latest updates.

Regards
C
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