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Thank you to all.

Great answers, however the problem is not with the column. It is with the girder. Apperently UL does not list an assembly for a tube section used as a beam. UL has several listings for tube sections but only when used as column or brace members, ie P>>M.

I have a condition were an exterior girder abuts a stairwell. As a result I have an lu of 15ft. I would like to use a HSS section to minimize the width and keep the section in the plane of the wall studs. However, the Architect does not know of any approved UL ratings for this assembly. This...

I started my career do these problems for the Army Corps of Engineers in Pittsburgh. I agree with swearingen there are a lot of items to consider and he lists a good start. As for some design guidance, I would suggest that you get a copy of the design guide by "Pile-Buck". It was many years a...

Does anyone have some background on the 1.3 reinforcement location factor for horizontal reinforcement placed with more thna 12" of fresh concrete below the development length or splice? The code only comments that the factor was changed to 1.3 from 1.4 in 1989 but gives no reasoning for the...

As JAE stated check the existing joist for the extra dead load. Also if the new light gage shed is unheated, you will need to take that into account in the snow loading. Unfortunately this will increase the required snow load.

Try Elocone nuts by Canam. They neck down so part of the nut is in the hole of the base plate. You may need to ream the hole slightly to provide adequate clearance, particularly if the anchor is not perfectly aligned, but it will be a more cost effective solution than the others mentioned.