Rabbit12
Structural
- Jul 23, 2014
- 491
I've read a handful of past threads on this, but wanted some assurance I'm doing this correctly.
To determine the design moment we take: Sd*Mstrength
This would then be compared to M=As*Fy*(d-a/2)
I'm checking a design that calculates Sd=fy/fs (assume phi and gamma are 1.0) and then take Sd*Mservice. The design then compares that amplified moment to M=As*Fy*(d-a/2).
I seem to be able to get a little more out of my section if I actually calculate Sd using phi=.9 and gamma equal to my load factor.
To determine the design moment we take: Sd*Mstrength
This would then be compared to M=As*Fy*(d-a/2)
I'm checking a design that calculates Sd=fy/fs (assume phi and gamma are 1.0) and then take Sd*Mservice. The design then compares that amplified moment to M=As*Fy*(d-a/2).
I seem to be able to get a little more out of my section if I actually calculate Sd using phi=.9 and gamma equal to my load factor.