Re: Side notches in Glulam

It's a rafter to ridge beam in this case.  The original design (stock plans) show lam-to-lam with Simpson hidden hardware. Since the TF has all the shop gear to make the notches, they want to skip the hidden (expensive) connectors and house the joist with GRKs to pin the rafter to the beam. This is a small residence, so the forces are fairly low. All I could come up with is separation of the laminations from bearing stress and possible "changing" of the grade of the top ply if a notch results in an imperfection closer to the edge than allowed (not sure which / if any lumber grades this would apply to). That last part might not even matter if  they're balanced since the notch would be in the compression plies.

Jordan

Scott E Maxwell wrote:

What kind of joint are you talking about?  A beam to girder connection?  Just housing or also a mortise and tenon?  Scott  On Mon, 17 Aug 2009 14:44:50 -0400, "Jordan Truesdell, PE" <seaint2@truesdellengineering.com> wrote:   

I have a timber frame client which wants to house some timber joints  into glulam beams. When we do this with timber, we simply reduce the  section. Provided that the top and/or bottom of a glulam isn't notched  any more or less than the inner plies, does anyone know of specific  prohibitions against side notches for housing (likely to be 0.5 to 0.75"  in a 5-1/8 wide member)?     

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