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John Patton
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# Posted: 2 Jan 2013 01:16pm
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I am planning to build a 30' x 48' bunk house. I plan on using #2 fir 2x10 x 16' floor joists to span the 30' dimension. (they will be lapped 12"). I have the trusses already....30' span trusses.
My question is what size to make the wood girder running down the center of the cabin on the 48' dimension. I am thinking it should be either three 2x10's spiked together and supported on 6" x 6" treated wood piers every 10 foot.....or should it be three 2x12s spiked together on 10' centers?
The perimeter wood girders would not have to be as beefy, correct? I was thinking three 2x10s spiked together supported on 4"x6" treated wood piers every 10'.
Am I overkilling or under-sizing?....or just about right?
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Moving Pictures
Member
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# Posted: 2 Jan 2013 09:11pm
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I'd do a google search for "beam and joist span tables" for your area.
I did a quick poke through the Canadian Beam tables and the most a system of three 2 x10 beams will support, by code, is a span of 8'4" apart (between posts) if the beams are supporting 16' joists.
Three 2 x 12's would give you a span of 9'8".
http://www.nanaimo.ca/assets/Departments/Building~Inspection/Publications~and~Forms/B eamAndJoistSpanTables.pdf
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Anonymous
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# Posted: 2 Jan 2013 09:41pm
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Hey! I really appreciate your feedback.....just what I was hoping to get. Thank you for taking the time to help me out.
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