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Old 02-27-2012, 07:12 PM   #16
mcu
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Just ripped out a newly installed floor because of a defect in tiles and need advice!


so if i could make a beam somewhere in the middle then I would be ok. What is the minimum I want to be at? I will use that to calculate where i need to put my beam. Now the only problem is that my room is 16' long, and since this is not a main beam, would i be safe with just three 2x10s on jackposts or 2x4s or would you still use LVLs? LVLs will cost a lot more and wondering if they are overkill since it will be there to just help out. So once I install a beam, am I good to go with these spots and no need to worry anymore?

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Old 02-27-2012, 07:47 PM   #17
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Just ripped out a newly installed floor because of a defect in tiles and need advice!


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So once I install a beam, am I good to go with these spots and no need to worry anymore?
I would think so, as far as the framing goes anyway. If the new beam left a max span of 7'6", your numbers are off-the-chart at about L2000. That's unheard of. I'd try for 10' or less.

Which beam depends on how much space you have to drop. 3-2x10's is good, but you lose more space than with a steel I beam. Wood is easier though. I vote for 2x10's.

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Old 02-27-2012, 08:29 PM   #18
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Just ripped out a newly installed floor because of a defect in tiles and need advice!


yea clearance is my main concern since basement ceilings tend to be lower to begin with. I guess 3x2x8 or 4x2x8 wont do it? again I have to measureit all properly but just so i know my options.
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Old 02-29-2012, 09:42 PM   #19
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Just ripped out a newly installed floor because of a defect in tiles and need advice!


Jazman, any thoughts on 2x8s?
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Old 03-01-2012, 11:18 AM   #20
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Just ripped out a newly installed floor because of a defect in tiles and need advice!


I think 3-2x8's laminated and bolted together should do the job. Make sure you select very straight boards and then make sure that every joists is supported equally.

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Old 03-01-2012, 11:29 AM   #21
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Just ripped out a newly installed floor because of a defect in tiles and need advice!


Last question, if i were to remove all the spots and start fresh with a trowel install over the existing sandcoat/tile that was done in the 90s, would I still be looking at adding support in the middle or would I be ok the way it was?
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Old 03-01-2012, 12:02 PM   #22
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Just ripped out a newly installed floor because of a defect in tiles and need advice!


You are most certainly over spanned with only the original tile work. Add up the dead load weights per sq. ft. yourself. Start with the weight of the subfloor and add everything above it that is fastened and stationary. I'll guess you're close to 30 lb. per sq ft. with only the original. Your house was probably built to meet 40 live/10 dead.

Wood is very forgiving, but there's a limit.

Jaz

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