crushing load on hss

huangyhg

crushing load on hss
i am reviewing an application that uses a hss8x4x1/4 as dunnage to distribute a 38 kip load across a solid mat of 6x6 timbers on a slab on grade.
can someone point me to a reference for checking the "crushing" effect of this load on the hss?
the load is applied by a shore leg with a 5-7/8 square, 3/8 thick end plate.
  
ralph
structures consulting
northeast usa
check out our whitepaper library.
excellent book, "hollow structural sections connections and trusses" by packer and henderson and available through the cisc in canada.
dik
a concentrated load on a tube won't take too much. if you want to analyze it (by yield line) refer to blodgett "design of welded structures".
personnally, i would just weld a thick face plate on the tube to adequately transfer the load to the walls.
aisc 13th chapter k and the commentary may be a little help.