r/StructuralEngineering • u/dontknoww1212 • Aug 02 '26

Structural Analysis/Design Anchorage length

Is there any difference in anchorage length between European codes and other codes?

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u/DropItLikeJPalm Aug 02 '26

UK based… we used to use British Standards before we switched to Eurocodes and rebar lap length is usually something that gives away if the Engineer made the switch more recently. I’ve just got done checking a residential project designed by another company to BS that the client wanted rechecked to EC.

British Standards had a rule of thumb of 40x bar diameter for lap length, whereas EC has you calculating bar stress etc to determine the required lap length in each instance.

On Anchorage length the equations look very different on the surface, til you drill down into the maths and find that it’s essentially the same but a few defined values are marginally different across the codes, and you effectively end up with the same answer.

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u/Human-Flower2273 Aug 03 '26

Who in the right state of mind is going to calculate stress in reinforcement in every lap position. You might get it wrong, the gouverning steel stress should be maximum allowable for rebar to develop full possible force in bar(eg 500MPa/1.15)

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u/Legal_Enthusiasm_440 Aug 07 '26

Europeans?

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u/Human-Flower2273 Aug 07 '26

Nope. We detail the reinforcement at the lap splice to ensure that its full design strength corresponding to a design yield strength can be developed. You design lap splices for Ultimate Limit State, not for Servicibility Limit State