Notched compression face of cantilevered glulam
Notched compression face of cantilevered glulam
(OP)
On a project that I am working on I have a 24ft span 5.5x16.5 glulam ridge beam, with 2ft cantilever each end. Well the Architect doesn't want to see a full 16.5" deep ridge at the exterior of the cantilevers.
I searched here and on the APA website and all I have found is the typical information about notching and drilling holes in simply supported glulam beams.
Please refer to the attached pdf of what I am proposing.
What are your thoughts?
Dl & Lr at the 2ft cantilever portion is 210plf & 320plf respectively.
Thanks
I searched here and on the APA website and all I have found is the typical information about notching and drilling holes in simply supported glulam beams.
Please refer to the attached pdf of what I am proposing.
What are your thoughts?
Dl & Lr at the 2ft cantilever portion is 210plf & 320plf respectively.
Thanks
RE: Notched compression face of cantilevered glulam
RE: Notched compression face of cantilevered glulam
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Notched compression face of cantilevered glulam
RE: Notched compression face of cantilevered glulam
Looks o.k. to me too. But, I’d change a couple things, I’d use a 1.5" or 2" dia. auger, or hole saw, not a .5" drill for the reentrant corner radius, they’ll have half a chance of hitting that and cleaning it up a bit. I would countersink the lag screw head and washer so the head was about .4" above the bot. of the beam. That way, if there is any beam shrinkage the head can move down a bit without being driven into the bearing surface.
RE: Notched compression face of cantilevered glulam
I agree it is a concern as I have seen that plenty of times, usually in older (25 years or more) conditions.
I would guess that a penetrating sealant would be the best approach for this concern.
Regarding the "lag screw" you are showing... IF I was going t use something like that, I would choose a small diameter (like 1/8") continuous threaded structural screw and probably use two of them over the 5 1/2" width.
RE: Notched compression face of cantilevered glulam