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Old 04-15-2009, 02:49 PM   #1
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composite deck boards


I'm in the process of installing a new deck using composite deck boards with pressure treated framing lumber. What is the recommended distance (on center) between framing joists for composite deck boards which tend to be more flexible than their wood counter parts?

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Old 04-15-2009, 03:46 PM   #2
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Check with Mfg to see their recomendation/requirement for warranty

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Old 04-15-2009, 04:29 PM   #3
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Your not going to be able to span more than 16" and if your running them diaganal your joist will need to be 12" O.C.
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Old 04-15-2009, 10:30 PM   #4
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Like the posts above, check with the manufacturer. Most are 16" o.c. or 12" o.c. diagonal.
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Old 04-16-2009, 06:18 AM   #5
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16" OC is usually the max as per the manufacturer but if that has to much flex for your liking go 12" OC. If you are doing steps go 12" OC with the stringers.

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Old 04-24-2009, 12:53 PM   #6
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Originally Posted by rcassidy View Post
I'm in the process of installing a new deck using composite deck boards with pressure treated framing lumber. What is the recommended distance (on center) between framing joists for composite deck boards which tend to be more flexible than their wood counter parts?

Dear R Cassidy,
I am a Representative of Trex and would like to direct you to our website to review all our installation details.

If you are installing 5/4 Trex board and it is a residential application, then the span would be 16" on center. For commercial it would be 12" on center. For a 2x4, the span is 20" for residential and 16" for commercial.

If you have any further questions, please feel free to contact me at 800-BUY-Trex or Trex.com.

Pat M
Trex Company
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Old 04-24-2009, 07:11 PM   #7
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It all depends upon the brand your using... There really are some that can get 24" O.C. and 16" O.C. diagonal. That being said if it can span 24 I would go 16. Do your research on brands, they are not all created equal. There are many that are absolute junk and you will regret spending the money in a few years.
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Old 04-24-2009, 08:24 PM   #8
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Originally Posted by Pat M View Post
Dear R Cassidy,
I am a Representative of Trex and would like to direct you to our website to review all our installation details.

If you are installing 5/4 Trex board and it is a residential application, then the span would be 16" on center. For commercial it would be 12" on center. For a 2x4, the span is 20" for residential and 16" for commercial.

If you have any further questions, please feel free to contact me at 800-BUY-Trex or Trex.com.

Pat M
Trex Company
Youd better run Pat, there are some people here that are pissed at you

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