Hanging truss

[Stugrenoverare]

Hello

I need to lift a sagging roof truss in a 1960s summer cottage. It's sagging 2-3 cm.
I'm planning to install a glulam beam in the attic that will span a gable and two adjacent trusses supported by an interior wall, about 4 meters long.

Initially, I thought of lifting the ceiling (under the sagging truss) with a column jack and then screwing it to the glulam beam. But that would damage the ceiling, and I want to avoid that.
Is there some fitting, turnbuckle, or another technique that can be used to screw the truss up to the glulam beam, meaning up in the attic and not against the ceiling?

 

[prototypen]

Attach a threaded rod to the inner ceiling on either side of the glued laminated timber and somewhat across the glued laminated timber with holes for the rods and screw on the nuts.

Protte

 

[Stugrenoverare]

Ok, how do you attach the threaded rods to the beams?

When you have the truss up against the glulam, do you leave the rods in place or switch to some other bracket?

PO

 

[prototypen]

I don't know what it looks like, but I can imagine that you bolt a piece of sturdy angle iron to the rafter's collar beam. It might be a good idea to attach 4 threaded rods to prevent the collar beam from twisting. The rods can stay in place.

Protte

 

[Stugrenoverare]

ok thanks I'll try with this