we have faced an issue in staad foundation version 9.1.0.14 as the self weight check box is missing which was available earlier.
Refer to attached snapshots.
Kindly check & respond to this issue,
Can you please attach the corresponding SFA files here?
KR240MS01_Perm_Supp_R2_foundation.sfa
Find attached ..error is same but might be different from the above snapshots.,
Please refer the below link for an explanation
https://communities.bentley.com/products/ram-staad/f/ram-staad-forum/103571/selfweight-of-mat-foundations-in-staad-foundation-advanced
how the second self weight factor is 2.5 as the explanation shows 0.6 multiplied by used factor which in my case is 1.
Refer to the snapshots shared earlier & marked.
Also what is the reason of all the warnings.
In your case, the values for calculating the self weight factor is different. Unit weight of soil is 24kN/m3, Soil unit weight is 20kN/m3, Slab thickness is 0.5m and the soil depth is 1.5m. So the factor will be 20*1.5/24*0.5=2.5.