This fairly common box is rated for 75# fans & 200# fixtures.
http://www.aifittings.com/whnew51.htm Assuming properly drilled pilot holes, would installing one on the bottom of a glue-lam provide the full support rating?
I'm envisioning the laminations separating as the screw enters the piolt hole, and the threads possibly not engaging the wood around their whole circumference.
The fixture in question is probably somewhere between 75 & 100 lbs.
Thanks.
