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Old 02-19-2011, 08:12 PM   #1
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subfloor on stair landing


just finished putting together the upper landing for doug fir stairs..here are the dimensions: (these are rough estimates)

height of landing is 48"

Length is 60"

Width is 60"

Have a post in the middle for support of flooring..from post to post is roughly 20 inches.

Doug fir posts are 6x8

will be covering the landing with 2x8 pine tongue and groove

Question: Can I just secure the 2x8s directly to the posts? I want the bottom of the 2x8s to be visible under the landing. Or do I need to lay down a 1/2 osb?

let me know

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Old 02-20-2011, 06:40 AM   #2
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subfloor on stair landing


I don't understand the post thing but 2X8 will be more than strong enough if you have the frame work with joists correct. If you are trying to span 60 inches with just the 2X8 T&G you will not have the support needed.

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Old 02-20-2011, 08:45 PM   #3
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subfloor on stair landing


ok, here a photos of the stair landing:

actual dimensions are:

width: 60"
height: 53 1/2"
depth: 58"

the distance between the middle post is 21 1/2" on west and 23" on east..reason is the placement of the timber frame for house..hope this clears up some confusion..a picture is worth a thousand words!

Yes, I will span the 60 inches, but there is a 5 1/4" beam bout half way..

So with these pics..do I need a subfloor?
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Old 02-21-2011, 05:30 AM   #4
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subfloor on stair landing


In short: no
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