What size steel I-beam do I need?


Old 03-23-18, 02:51 PM
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Join Date: Mar 2018
Location: United States
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What size steel I-beam do I need?

I have 2 rooms that I want to build, one 25' x 40', and one 25' x 25'. These rooms will be inside a larger building, but will still need roofs to maintain a constant temperature. We think steel I-beams will work the best, one 25' and one 24', with wood joists to support the roof. We need a guesstimate as to costs to present to the bank, so if someone knows the size these beams would have to be so I can get a price, I would much appreciate it. We have figured the maximum weight on the beams would be 1000 pounds.
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Old 03-23-18, 03:00 PM
Join Date: Mar 2009
Location: Northern Virginia
Posts: 3,476
Why not go with LVLs? They're cheaper and will do the job. 2x8 SPF rafters 16" O.C. should suffice, maybe even 2x6.
Old 03-23-18, 03:03 PM
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Join Date: Oct 2012
Location: Northern NJ - USA
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Welcome to the forums.

To give you an answer to your question would require guessing on our part.
You'd need the services of an engineer or a qualified builder.

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