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What kind of load would one expect a 1 1/2" box tube to hold in straight compression OAL of 12'
Reply:The member will fail in buckling, so wall thickness would be needed to determine the exact strength..No government ever voluntarily reduces itself in size. Government programs, once launched, never disappear. Actually, a government bureau is the nearest thing to eternal life we'll ever see on this earth! Ronald Reagan
Reply:looked to see whats on the rack, no 1 1/2 but i havea few sticks of 2" x .12
Reply:That 12 foot 2 inch square, .12 wall will hold between 1000 pounds (one end anchored, the other free) and 20,000 pounds (both ends anchored).  That is with a safety factor of 1, so if anything important is going to be on it or under it go with the some fraction of those loads, maybe half.
Reply:HSS references to keep handy:http://www.hss-steeltubing.org/brochures.htmlThere are a number of downloadable .pdf docs at that site.  For your current inquiry scroll down to find the Column Load Tables.  There are two such documents, one coveres tube manufactured with ERW and SAW methods, the other for tubes manufactured with electric resistance or submerged arc welding processes.  (funny they list two docs, the process are the same!) So to get good results from your research you need to know how the tube was manufactured.  Your supplier will know this.For the uninitiated: HSS = Hollow Structural SteelERW = Electric Resistance WeldingSAW = Submerged Arc Welding- MondoPS:  Ok, one is for LRFD and the other is for concentric loads, I think.  I am still trying to figuire out what is meant by LRFD and why I should care.mLast edited by Mondo; 01-24-2013 at 10:07 AM.Reason: Technical edit.Member, AWSLincoln ProMIG 140Lincoln AC TombstoneCraftsman Lathe 12 x 24 c1935Atlas MFC Horizontal MillCraftsman Commercial Lathe 12 x 36 c1970- - - I'll just keep on keepin' on.
Reply:Thanks for the link lots for me to read, all the tube on the rack is ERW