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-   -   Pergola Unsupported Length (http://www.diychatroom.com/f19/pergola-unsupported-length-19627/)

wsuswim147 04-07-2008 08:30 PM

Pergola Unsupported Length
 
Hi All,

I am in the design phase for a Pergola I am going to construct and want to know if my unsupported length is too long. I am currently planning on a freestanding structure 14'4" x 5'10" with 6"X6" posts at the corners. The girders and rafters will be 2"X6" layed in a grid pattern, evenly spaced. All construction is with Cedar. Is the 14'4" too long of an unsupported length for the dead weight of the pergola? Should I plan on putting another 6"X6" post in the middle. I am not planning on this bearing any load besides the weight of the structure itself.

Thanks in advance.

wsuswim147 04-08-2008 04:58 PM

bump :)

Ron6519 04-08-2008 10:56 PM

For 14+ feet a 2x8 would be too small. Double 2x10's, one on either side of the 6x6 along the 14 feet. I would also put spacers every 3 feet or so to unitize the 2x10's. The 2x6's on top spanning the 5'10".
Ron


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