fire rating of concrete-filled hss column sections

huangyhg

fire rating of concrete-filled hss column sections
i am designing exposed exterior hss18.000x0.500 columns to support a roof above an interior atrium space.  since the columns are visually exposed and also exposed to the elements, i am reluctant to recommend intumescent piant for fire protection as it will experience uv degradation over time.  i have recommended filling the columns with concrete as an alternate to intumescent piant; then simply painting the columns a weather resistant grade of paint.
can some one direct me to where/how i can qualify the fire rating of the resultant composite column sections?
thanks, in advance.  
check out our whitepaper library.
have you tried searching aci publications?
  
ralph
structures consulting
northeast usa
maybe you can find something in ul which suits your case.
how about dropping a cage of rebar in there and making it a concrete column with steel cladding?   
i have posted you answer to the faq section named "how to calculate fire rating of concrete-filled hss column sections".
it shall be up by tomorrow i guess.