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Old 05-18-2011, 03:24 PM   #1
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deck stair stringer footings


As I am working on my deck design I keep coming back to how I want to secure my stair stringers at gound level. My deck design is going to include a full set of stairs on all sides, except for the side against my house. For the rest of the deck I am placing 4 ft deep footers in the ground, but I am unsure as to the best way to support the stringers on the side opposite of the deck (ground level). I don't want to use just the ground to support.

Should I place a concrete post at each stringer (would be alot since I have 47 stringers in total?

Should I place a concret post every X ft and run a beam between the posts that the stringers will sit on?

Thoughts and help is appreciated.

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Old 05-18-2011, 05:07 PM   #2
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deck stair stringer footings


Are we talking about the end of the stringer where it reaches the ground? I just dug a rectangle, a little larger than the bottom step, about 4-6" deep. Filled with concrete and leveled it. Sloped just a bit so water wouldn't pool. The end of the tringer rests directly on it. If your stringers are so long that you feel the need to support midway, I'd just pour footings like the deck has and use a post to the bottom.

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Old 05-18-2011, 10:14 PM   #3
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deck stair stringer footings


Notice the maximum span for cut stringers for table 1 species in fig.28, and more than a pad is required when using a guardrail for the 200# side resistance per code (Fig. 33,34); http://www.awc.org/Publications/DCA/DCA6/DCA6-09.pdf

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