engjg
Structural
- Jan 2, 2015
- 92
Referencing IBC 2015 & ASCE 7-10 is one permitted to reduce seismic loads per ASCE-7-10 12.13.4 in the IBC 16-15 (0.6D+0.7E) load combination with a factor of safety of 1 for satisfying overturning or uplift stability of a footing or mat foundation?
In other words I think most would agree if you satisfy overturning or uplift stability under 0.6D + 0.7E with a factor of safety of 1 you are good since 0.6D + 0.7E is the older load combination 0.9D + 0.7E and 1.5 factor of safety requirement...so can you not use 12.13.4 if meeting requirements of asce 7 and check 0.6D + 75%x0.7E with a factor of safety of 1?
How about a retaining wall application and how IBC 2015 1807.2.3 plays into this?
In other words I think most would agree if you satisfy overturning or uplift stability under 0.6D + 0.7E with a factor of safety of 1 you are good since 0.6D + 0.7E is the older load combination 0.9D + 0.7E and 1.5 factor of safety requirement...so can you not use 12.13.4 if meeting requirements of asce 7 and check 0.6D + 75%x0.7E with a factor of safety of 1?
How about a retaining wall application and how IBC 2015 1807.2.3 plays into this?
