I am verifying reinforcing of an existing roof for an added mech unit. We have 4x14 existing joists at 6ft oc that have lvls added on each side for additional strength. I am trying to verify what % of the load the 4x14 takes and what % the lvls take. I have used the parallel axis theorem up to this point, but wanted to make sure i was on the right track. Thanks for any input.
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