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enter image description here Might there a difference in design approach for punching shear for the two scenarios? Or something to pay particular attention to?

Is the slope of the shear plane (normally 1:1) the same for both scenarios? I would assume that it is, since the two design codes I usually use (Eurocode and SABS) do not differentiate between the two scenarios.

SlydeRule
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As an honours civil engineering student I have been taught by three different doctors of civil and structural engineering that there is no difference between the two scenarios in design practice. What matters is how you prevent actual punching of slabs using collars, rebar design and other methods.

Rhodie
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