13-08-2013, 11:58 PM
Tony Szamboti Wrote:Why would you challenge something like that?
Not all the facade columns had the same FOS... the higher FOS would have been where they used the thinnest steel to reduce OAL weight so that the columns at the lower part were not solid and could be bolted together. They used higher grade steel because A36 was not stiff enough... There is no load reason to use the higher grade steel.
I don't trust everything that NIST writes either and therefore everything they say is taken with a grain of salt. The FOS at the base was nothing like 5:1. I find the pull in makes little sense. But I wasn't there.
Neither were you.