Does AISC 13th Manual still allow 10% negative moment reduction?
Does AISC 13th Manual still allow 10% negative moment reduction?
(OP)
We usually reduce 10% negative moment in continuous W shape beam in our past design projects, which is allowed per LRFD Section A5.1. Now our company is going to change to use AISC 13th. I am not sure if it is still allowed to have this 10% reduction in negative moment. I can not find the same section in AISC 13th. Is it still allowed to have 10% reduction in AISC 13th.?
Thank you for your clarifications on this issue.
Thank you for your clarifications on this issue.






RE: Does AISC 13th Manual still allow 10% negative moment reduction?
Would you be referring to plastic design?
If so, Appendix 1 would be applicable.
Note that your sections must be compact to take advantage of plastic design.
RE: Does AISC 13th Manual still allow 10% negative moment reduction?
RE: Does AISC 13th Manual still allow 10% negative moment reduction?