Beams That Span 14 Feet How Ar Can I Space Them? - Building & Construction - DIY Chatroom Home Improvement Forum

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Old 04-06-2010, 01:44 PM   #1
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beams that span 14 feet how ar can I space them?

Hi everyone,
I am planning to build a shed roof with a post and beam look and was hoping to have to use either a 4x6x15 or 6x6x15 beam spaced 3 or 4 feet apart on center. is this possible and would these sort of beams work ok or would i need something else. in live in new england and occasionally have snow so i think i need to worry about snow load. this roof is simply to cover a concrete patio that we have now.


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Old 04-06-2010, 05:30 PM   #2
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lots of span calculators available on Google
they seem shallow to me.
and what are you planning for decking on top of that? Insulation?

any Timber framers in your area? http://www.northernlightstimberframi...preadsheet.htm


Short of cutting off a body part, the worst that can happen in woodworking is manufacturing really nice looking kindling. --- Quoted from lenaitch

Last edited by jlhaslip; 04-06-2010 at 05:36 PM.
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Old 04-07-2010, 01:47 PM   #3
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Technically, minimum code would still require you to use 6x6 rafters 36"oc. You'll still have 3/4" deflection under a decent snow load. Personally if it were mine, I would use 4x8 rafters if I wanted to use 36" spacing.

The bigger issue is what you're gonna use for decking. Make sure you use a decking that is rated for a 36" span. Also, make sure your beams supporting those rafters are stout enough.
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Old 04-10-2010, 05:23 PM   #4
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It also depends on the modulus, E, for the wood you are using; 1 million PSI is about average.
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Old 04-12-2010, 03:13 PM   #5
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Originally Posted by Yoyizit View Post
It also depends on the modulus, E, for the wood you are using; 1 million PSI is about average.
You are correct. I used 1.2 Million for my post above. We usually use SPF lumber around here.
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beams , joists span , roof

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