Full Depth Cut into LVL load bearing

[AdamS111]

Hello all!

My new build development home is currently under construction and a concern issue was brought to my attention by one of the workers.

They informed me that the LVL beam in the basement has been cut, by what appears to be a chainsaw (based on cut thickness). The cut runs the full depth of the beam (~3 in), and is 1/2 to 1 inch deep.

I don’t know the span of the beam, or much details. But I have scheduled a walk through with the builder and will take measurements and pictures then. I will upload them when I get them next week.

Just wanted to see your opinion on this, is it cause for concern for the longevity of the house? Should the builder take action?

Thank you!

 

[dik]

The beam width is 1.7" approx? A 1" cut into this reduces the strength a bit... but not sure how much since you're not looking at horizontal shear; I'll ask my timber buddy...

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[Celt83]

My new build development..

If this were my brand new built for me home they’d be replacing the damaged beam full stop. Why would you settle for anything less?


My Personal Open Source Structural Applications:

https://github.com/buddyd16/Structural-Engineering

Open Source Structural GitHub Group:

https://github.com/open-struct-engineer

 

[MIStructE_IRE]

Well the reduced cross section at the point of the cut is of course a weak point regardless of what its doing.. Just tell them to replace it.

 

[phamENG]

I agree. If it shouldn't have been cut, then it shouldn't have been cut. Don't let them cut corners on you after cutting off the end of a beam. Will it do something bad? Maybe, maybe not. Will do it do something good? Certainly not.

If they won't do it, make sure they don't cover it and get a structural engineer out to evaluate it.

 

[XR250]

Need some pics before you can get any useful responses here. Every situation is different. The cut may not make any difference in this particular case.

 

[Ron247]

What you call full-depth, I assume is what I call the "thickness" of the beam. Depth is generally referred to as to how tall the beam is. A 1" cut in a 24" tall beam is not as big a deal as it is in a 12" tall beam. So actual depth/height is something to consider.

If the cut will always be visible after construction is completed, you need it addressed and documented now. A good home inspector would probably point out the cut if they noticed it. That tends to lead to hiring an engineer at that point to get the house sold. Better to address it now and get results in writing.

 

[dik]

From my consultant... "Standard width of LVL is 1-1/8", 1-1/2" and 1-3/4" . For a vertical saw cut, use the reduced width
for shear design."

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik