The width is 60 feet and the height is 20 feet in the center .. The load
will be spanned 2 feet in the top center of the arch. If tube is not bent
, it can be welded every 10 feet of the arch and a piece of flat strap
welded to butt welded joint to strengthen to joint. We are actually trying
to support something 2 feet wide by 30 feet long weighing 1300 pounds. The
arched tubing will be fastened to a roof above which will not allow it to
shift. I want to support the 1300 pound weight sitting on the arched steel
roof above. The arched steel roof already exists, I just want to add
arched steel support underneath. I do not want to use any of existing roof
to support weight because I want to maintain prior engineered snow loads.
I can bolt into roof to reduce shifting The roof is 18 gauge steel, int
the shape of described arch. The base if the new support arch of 2"x6" ?
Square tubing can be anchored in to cement at ends by use of steel plating
and anchor bolts.

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