sistering floor joists with LVL

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Old 04-07-19, 06:42 AM
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sistering floor joists with LVL

I have a few cracked floor joists (2x8) and I am planning to jack and sister them. My preference would be to use LVLs that would be glued and screwed to the existing solid joists. In planning this I have come up with a concern about differences in coefficient of expansion between the LVL and the solid which could obviously cause bending . Does anyone have experience with this?
 
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Old 04-07-19, 08:16 AM
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I would not be concerned with their differing expansion rates. If you are concerned then just use dimensional lumber for your sistering.
 
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Old 04-07-19, 08:36 AM
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The joists involved were originally non load bearing but at sometime an addition made them load bearing. That's why I would like the extra strength.
 
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Old 04-07-19, 10:13 AM
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Sounds like you need to do a bit more engineering work than just guessing at "... extra strength".
 
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Old 04-07-19, 03:41 PM
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I am adding columns and the sister joists will be full length and on the main beam/sill plate. I just want to go the extra mile.
 
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