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-   -   Deck Spans and support positioning (http://www.diychatroom.com/f19/deck-spans-support-positioning-168915/)

justme729 01-12-2013 01:49 PM

Deck Spans and support positioning
 
We are designing a deck...it will be 10 feet high, over our basement garage, for a new construction home. It is 12 X12 on both sides and 24' X 6' (the great room is a bump-out of the other 6') in the center = 48' wide. Can we use a header to eliminate the support post, if so, how long can the runs be? If not, often do we need to put in a support post?

Thank you!!!

Daniel Holzman 01-12-2013 03:25 PM

You are essentially asking for deck design help. You have not stated where you are located, what codes if any you are designing to, and whether you need a permit. My suggestion is to discuss design standards with your local code enforcement official. If you don't have any codes where you are, you can safely base your design on the Prescriptive Residential Wood Deck Construction Guide (http://www.awc.org/Publications/DCA/DCA6/DCA6-09.pdf). This guide will give you allowable spans, construction details, and most everything else you need to construct a safe, code compliant deck.

robertcdf 01-14-2013 10:31 AM

Anything can be done... As long as you have the money for it. I could design it to only have 2 posts holding it up (expensive) I could also design it to have 0 posts holding it up (very expensive) but there are a lot of other options in between that could serve you well. What kind of clear spans are you looking for? 10'? 12'? 16'?

fltdek 01-17-2013 07:11 PM

Quote:

Originally Posted by robertcdf (Post 1093149)
Anything can be done... As long as you have the money for it. I could design it to only have 2 posts holding it up (expensive) I could also design it to have 0 posts holding it up (very expensive) but there are a lot of other options in between that could serve you well. What kind of clear spans are you looking for? 10'? 12'? 16'?


Nice!!:thumbup:

efficiencyhomes 01-18-2013 03:03 PM

Check with local building codes. I've seen so many cases where decks are built very solid but not to local code and it can become a real headache when you try to sell. In some cases they may even force you to tear it down. Best to build it to "code" the first time. Your local building dept will tell you what to do.

Taylor Rae 01-19-2013 10:45 AM

I would have a little better plan before consulting your officals. Buy some reference materials that will provide span charts (you can pick them up at home improvement stores) and have a few try's at the design based on what you can determine from the books. Once you have a pretty solid preliminary design you can bring it to your construction official for some help. Usually, the official will be more apt to help if you go to him with at least a preliminary design. That's my experience, it could be different in your area.


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