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06-28-2009, 04:37 PM
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#1
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Newbie
Join Date: Jun 2009
Location: texas
Posts: 2
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splicing ceiling joists
I need ceiling joists 20', but can only 16'. Can I splice two boards to get the length?
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06-28-2009, 05:12 PM
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#2
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Extreme DIY Homeowner
Join Date: Jan 2009
Location: South of Boston, MA
Posts: 8,703
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splicing ceiling joists
What size boards?
Short answer - no - not really
There are 20' joist available at most lumber stores - even HD/Lowes
I went with I-joists on a 17' span for added strength - walk up attic
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06-28-2009, 07:18 PM
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#3
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Custom Cabinet Maker
Join Date: Jun 2007
Location: Netcong NJ
Posts: 1,098
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splicing ceiling joists
Agree Dave: Baas if you need 20' then just get TJI's easier, lighter,straighter, and probably cheaper
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06-28-2009, 07:27 PM
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#4
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Framing Contractor
Join Date: Apr 2006
Location: Caldwell, NJ
Posts: 292
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splicing ceiling joists
Quote:
Originally Posted by baas1219
I need ceiling joists 20', but can only 16'. Can I splice two boards to get the length?
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You can get 20' 2x6, 2x8, 2x10, 2x12 joists at any lumberyard. Forget I-joists and spending the extra money.
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Joe Carola
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06-28-2009, 09:08 PM
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#5
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Extreme DIY Homeowner
Join Date: Jan 2009
Location: South of Boston, MA
Posts: 8,703
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splicing ceiling joists
I-joists weren't that much more then the 2x12 x 20'
They were lighter, stronger & easier to install
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06-28-2009, 10:08 PM
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#6
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2 fingered typer
Join Date: Jun 2009
Location: Near Pontiac, Mich
Posts: 32
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splicing ceiling joists
Quote:
Originally Posted by baas1219
I need ceiling joists 20', but can only 16'. Can I
splice two boards to get the length?
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20 feet is a hellofaspan if there is a floor load above. If this is a garage with "no load" above, remember how stuff gets stuck up above the rafters? heh..heh What's your application here?  bill
Last edited by woodnthings; 06-29-2009 at 05:54 AM.
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06-28-2009, 11:17 PM
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#7
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Framing Contractor
Join Date: Apr 2006
Location: Caldwell, NJ
Posts: 292
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splicing ceiling joists
Quote:
Originally Posted by Scuba_Dave
I-joists weren't that much more then the 2x12 x 20'
They were lighter, stronger & easier to install
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You have to be careful when using I-joist for ceiling joists because you can't just cut the top angle on the I-joist to follow the top of rafter beyond the inside of the wall. 2x's you can.
Scroll down to the bottom left on page 12.
http://www.kentinternational.ca/broc...System/TJI.pdf
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Joe Carola
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06-29-2009, 12:45 PM
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#8
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Building codes guy, Mod
Join Date: Apr 2008
Location: Kansas City area
Posts: 6,258
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splicing ceiling joists
Without the assistance of a structural engineer a splice in the span is a big no-no. You can get 20' lumber at nearly any good lumberyard.
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The building code is a minimum standard, and merely meeting it instead of exceeding it equates to building your project to the worst standard that the law will allow. 
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06-29-2009, 09:59 PM
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#9
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Extreme DIY Homeowner
Join Date: Jan 2009
Location: South of Boston, MA
Posts: 8,703
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splicing ceiling joists
Quote:
Originally Posted by Joe Carola
You have to be careful when using I-joist for ceiling joists because you can't just cut the top angle on the I-joist to follow the top of rafter beyond the inside of the wall. 2x's you can.
Scroll down to the bottom left on page 12.
http://www.kentinternational.ca/broc...System/TJI.pdf |
Ah, I had a walk up attic above that
So they were a ceiling joist & a floor joist
I think I'd be inclined to install a double top plate across the I-joists & then the rafters
Good point
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06-29-2009, 10:48 PM
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#10
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Member
Join Date: Mar 2007
Location: Long Island, NY
Posts: 3,429
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splicing ceiling joists
Quote:
Originally Posted by baas1219
I need ceiling joists 20', but can only 16'. Can I splice two boards to get the length?
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You need to specify the use for these. What loads they will carry? Partition walls under the joists?
The post is too vague to be answered.
Ron
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