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Old 01-31-2009, 07:49 AM   #1
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I-Beam For Joist To Avoid Support Post


Constructing a 20x30 shop and planning on 2 story.My question is can I use two 20ft steel i-beams(12"high and 5/16 thick)to support 2x6x10s on 16" centers for flooring.Not planning on storing anything real heavy up stairs.Tried using formulas and calcs. but I didn't fully understand them.Thanks!

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Old 01-31-2009, 09:53 AM   #2
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You need a structural engineer to take a look at your design to make sure that the beams you propose using will work. The tributary load on those beams would be pretty high, and I seriously doubt you'll get a 12" beam to span 30'.

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Old 01-31-2009, 09:58 AM   #3
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I-Beam For Joist To Avoid Support Post


The beam only needs to span 20'.
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Old 01-31-2009, 11:47 AM   #4
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I-Beam For Joist To Avoid Support Post


Yes the ibeams will cross the 20ft span and divide the upper floor(lower roof) into three 10ft sections.The ibeams running in the "Y" axis and 2x6x10's running in the "X" axis with 3/4 plywood tying everything in together.Thanks for all your help. Think this will be sufficient or do I need to regroup?
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Old 01-31-2009, 01:40 PM   #5
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Either way you'll need an engineer or architect to sign off. You won't be able to get a building permit in most jurisdictions without the support/seal of a design professional.
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