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Repair of a MicroLam beam

Repair of a MicroLam beam

Repair of a MicroLam beam

(OP)
We have a double 11 7/8"x 1 3/4" micro lam that spans 18 feet. As a result of a leaking shower pan, at lease 5' feet of one of the sistered micro lams has rotted.
There is not enough room to sister another micro lam to the existing two beams. We would like to cut out the rotted beam and replace the sections with a new micro lam.

What would be an acceptable means of splicing the existing rotted micro lam to restore the full load capability???
I don't think we can thread a new micro lam in the existing space.

Other info: The double micro lam is above a garage so we have full access from the bottom. The structure above the micro lam is single story wood frame.

See framing plan attached

RE: Repair of a MicroLam beam

Shore up all floor joist which T into the micro-lam beam. Rip out the entire micro-lam beam and replace the entire micro-lam beam. Don't mess around with any type of splice, it is too difficult to do even if theoretically possible, which I doubt.

Jim

RE: Repair of a MicroLam beam

Any possible splice method would require sistering long sections alongside the splice. Since you indicated there's no room to sister, splicing in part of a beam is virtually impossible.

So Jim is right - You need a whole new beam. I have no doubt a replacement can be done. But it will certainly be a difficult and involved process.

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