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Old 03-27-2014, 08:22 PM   #31
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So from the steel beam to the outter wall ?
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Old 03-27-2014, 08:33 PM   #32
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Here's another pic
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Old 03-27-2014, 08:37 PM   #33
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And from beem to other side is 12 feet
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Old 03-27-2014, 08:48 PM   #34
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OK, as my mother used to say, "thatsa mo better".

So, Spruce - Pine - Fir grade # 2

The chart says if they are all in good shape and no one drilled large holes or made notches etc. You would still meet the minimum deflection of L360 rated at 50/20 live/dead load at a span of 10' 8".

The building code for load is 40/10, but I use 50/20 because it's ceramic tiles going down. If you can sister even just the mid span 4-6 ft or whatever, that would be a good thing.

Yes, from the face of one support to the face of the other.

* 12 ft. span is a little too weak. Do as I said or install a beam across to shorten the span. Otherwise you may be back asking how to repair cracked grout or tiles.

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Old 03-28-2014, 10:07 AM   #35
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i can see that some of the joists... close to the wall have been sistered... under where the sink is... but none of the rest... what kind of wood would u recommend, i think i can do 4 foot maybe 6 foot ones

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Old 03-28-2014, 10:11 PM   #36
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Use the widest & longest possible. 2x of course is the first choice. Some use 3/4" ply, anything will help. Laminate and bolt.

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Old 03-30-2014, 08:57 AM   #37
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Well they came
Yesterday.... They inspected
Everything an said that the
Subfloor is only nailed down and that all it needs is a boat load of screws... So I ripped up the floor where the laundry is, put down about 40-50 screws and ran a load and what diff already ... Can't wait to do the whole room!! So they said with screwing it down and the DITRA it will be rock hard so I feel a lot better with your help and theirs .. Thanks for everything and I know if I have any question where to come !!
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Old 03-30-2014, 12:18 PM   #38
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You are free to do what ever you want. The minimum specs I talked about is based on joists and subfloor in good condition and installed correctly. Adding screws does not improved the floor beyond the specs, it just takes you to the way it's supposed to be.

The floor will not bounce as much once the ply is not bouncing on the joists because it's loose. That doesn't mean you're ok, nor that the floor will automatically fail.

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