yeah, ive not got a reference, but my money would be on I beams...
theres not a lot of side/side load to take advantage of the design of the H beam, but there is a lot of front/back (for want of a better description) load associated with the continual acceleration/deceleration of the rod on that axis - which is where the I beam is more strongly designed. the 'exactly on axis' compressive/tensile differences would be minimal id think - and would come down more to individual material, style of fabrication and finishing
slightly lighter as you say as well
but the argument has been going on for a while now, and i dont think there is a universal answer.
thats my 2c
Bookmarks