octagon deck


  #1  
Old 04-23-03, 04:27 PM
rickyzicky
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octagon deck

Where is the best palce top place to post and beams for a 10x10 octagon deck.

I've been getting mixed opinions.

Some say ledger & 1 beam w a 3' cantilever will do the trick and other say I need 2 beams on each side of the octagon.

Any suggestions.

Thanks
 
  #2  
Old 04-23-03, 08:36 PM
L
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Location: Arlington, WA
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Rule #1. Don't cantilever dimensional lumber more than 2'.

Following that rule, I have always used at least 3 girders on decks with more than 10' of projection -- a girder 2' in from each edge, and, in the case of a 10' deck, a third girder in the center.

On a pure octagonal deck, where all 8 sides are equal, any 2 opposite sides can be treated as your projection. (If you were to number the sides in a clockwise order, that would be sides #1 and #5. Sides #3 and #7 would be your width.)

The center girder would run from side #3 to side #7. The parallel outer girders -- one would run from side #2 to #8, the other from side #4 to #6.

Joists would run perpendicualr to the girders and be attached to your rim joists. Joist spacing is determined by how you are going to install the decking and the type of decking you are using.
 
 

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