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bcelect

10:00AM | 05/02/04
Member Since: 02/21/04
138 lifetime posts
Bvtools
I would like to build a deck on an existing poured concrete patio. I plan on using simpson strong tie anchor brackets for my 4x4 risers (about 12" height) Then bolt to sides 2- 2x8 or 10s, and cantilever over edge of patio about 18". Then I would like to run 2x8 s perpendicular and cantilever out over to the lawn, using simpson strong fasteners also. I would like to use timbertech decking on top. This would be free of the house and just supported by the patio. My questions are, should I go with double joists on the first direction or or could I do it with a single? Should they be 2x10s or can I do it with 2x8s? How far of a cantilever can I make with either? I don't nee any more than 18".

homebild

01:39PM | 05/02/04
Member Since: 01/28/03
694 lifetime posts
It is not possible to tell you what size floor joist you need without also knowing the overall span these joists will cover, they type lumber from which the joist will be made, and your local building code requirements for total lbs per sq foot of load the deck must be constructed to carry.

As far as the 18" cantilever goes, most any joist from 8 to 10 inches can handle an 18" cantilever.

But for the purposes of this forum, your question cannot be answered.

Consult your local code enforcement office for their requirements.
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