I have detected a supposed error in the allowable stress soil calculation and I need to confirm it.
For a single footing, in the calculation note point 1.2.3 for the analytical method and with the foloing data:
- Calculations according to EN1997-1 2004;
- friction degree angle: 34.9º;
- Assumption 2 where we need to divide the tg(34.9) by 1.25;
The calculations presented show a Nq value of 21.21. This value only depends of the friction degree angle so it must be Nq = 16.75 instead of 21.21.
Please confirm, as soon as possible, what is happening where, this is a very important verification to the footings allowable stress. See the file attached below.
This issue has been corrected in SP3 for Robot 2013.