Glulam beams: specifying is one thing but.....
Tanners (our SE) have specified two glulam beams for our ridge;
140 by 270 in 5 laminations using C24. One is about 4 meters long and the other 6 meters.
I have asked around and nobody does exactly that specification (or at least I haven't found anyone who does yet) in terms of either length or wood specification.
Here's what one manufacturer came back with (we have had similar stories from other manufacturers)
90 X 300mm PEFC GL32c Glulam Beam.
Wh
Sorry slow response.
its my own time saver!
On the plumb cut of your rafter rater than site the rafter on top of the GL and cut all those plumb and seat cuts we ping a line on the side of the GL and nail on hangers at spacing's. We then cut all our rafters ( we gang cut all at same time in one pass) and on the plumb cut we run a cut through the plumb cut at 90 degs as a seat to the hanger usually 40-50 deep at the correct rafter depth. its quick and neat and also gets