If you've got a rigid T<0.06s non-building structures per 15.4-5, and you read 11.4.8 Exception 2 as literally as I do above, does this mean you can't calculate the base shear using Eq 15.4-3? 0.3*SDS*W*I
I don't think that's exactly correct in that the usual method of calculating Cs per section 12.8 puts an upper limit on Cs per Eq (12.8-3/4). Since the new verbiage of Exception 2 says "Cs is determined by Eq (12.8-2) for values of T <=1.5Ts", I don't think there is an upper limit on Cs if using...
JStephen-
The plate is to be a solid circular plate and not an annulus. (Screen clip of the Roark case I was looking at attached.)
I may, of course end up going with a conservative very thick plate, but I was just seeing if anyone has come across a similar example and if they did not resort to...
I've been coming across eng-tips threads for years while searching for discussion of various problems at work. Finally got around to registering and posting my own and I'm hoping to get involved.
I know its best to include sketches but I'm hoping the question is straight-forward enough for me...
