I have a free standing, 4 column concentric braced frame stair access tower in a seismic design category D zone.
It can be classified per ASCE 7-05 table 15.4-1 as an ordinary concentrically braced frame, whereby you have to either design it as a building or use a low R value of 1.5. As far...
We are in the process of writing a specification for design and construction of a slip-formed concrete silo. We are trying to find a standard or "go by" spec to help us, but have had no luck finding one so far. Any ideas of where we could find a detailed spec to consult?