Thanks for the reply. My catwalk platform is supporting by series of steel columns w/ X steel braces in between. If the catwalk structure is defined as building structure, then I can use the equations in ASCE7 Chapter 12. For those coeffs within the equations, can I use Ct = .028, x = 0.8, R = 3.5?
I am working on a catwalk design project in California. I am trying to find how to calculate the base shear for the structure. I ran through ASCE7-05 and IBC 2006 but I could not find a seismic design section talk about catwalk/bridge. I think the catwalk should fall between building structure...