This is not a SFA software-related problem. But this limit has to be set manually when we use SFA.
But I didn't find any provisions for it in US codes.
In VERIFICATIONMANUAL, 75% is used.
If buoyancy is not included, SFA calculates the total downward force as selfweight of footing + soil weight + force from column + surcharge load
If buoyancy is included,
Total downward force = selfweight of footing + soil weight + force from column - buoyant force
Surcharge load too is treated as a transient effect, meaning its effect is included only in those calculations where it increases the "demand" on the foundation
Answer Verified By: ZHAO BIAO