I am planning to build an extension to a 60s-style house with a gable roof, with a small addition featuring a gable roof on the long side. The extension will be part of an existing room, and I don't want any beam that lowers the ceiling height.
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H = Wall plate
X = Glulam beam
We will open up an approximately 3.6-meter section on the long side of our house, and the existing wall plate will not be able to support the roof on its own as the trusses and joist bear on the wall plate. I am thinking of placing a glulam beam (315*115 mm) on a couple of glulam pillars (115*115). The reason I've chosen a wide glulam beam is because I need to fit the beam under the new trusses without removing too much material where the beam rests on the pillars.
I can't easily replace the existing wall plate, so my plan was to place the glulam beam next to the wall plate and somehow attach the wall plate and truss to the beam. The glulam beam should be at the same height as the wall plate. I will then cut the trusses along the wall plate.
Normally one uses joist hangers between a beam and a truss, but it seems to be difficult to achieve sufficient strength since the truss is slender (dimension 140*45) and the part resting on the wall plate is chamfered. Can you, for example, screw the wall plate with brackets to the glulam beam to make it hold, or manufacture a metal profile to connect the beam with the wall plate? Does anyone know how such a problem is normally fixed? I have searched online but can't find any ready-made solutions.
XXX
XXX
XXX
XXX
XXX
XXXHHHH
XXXHHHH
H = Wall plate
X = Glulam beam
We will open up an approximately 3.6-meter section on the long side of our house, and the existing wall plate will not be able to support the roof on its own as the trusses and joist bear on the wall plate. I am thinking of placing a glulam beam (315*115 mm) on a couple of glulam pillars (115*115). The reason I've chosen a wide glulam beam is because I need to fit the beam under the new trusses without removing too much material where the beam rests on the pillars.
I can't easily replace the existing wall plate, so my plan was to place the glulam beam next to the wall plate and somehow attach the wall plate and truss to the beam. The glulam beam should be at the same height as the wall plate. I will then cut the trusses along the wall plate.
Normally one uses joist hangers between a beam and a truss, but it seems to be difficult to achieve sufficient strength since the truss is slender (dimension 140*45) and the part resting on the wall plate is chamfered. Can you, for example, screw the wall plate with brackets to the glulam beam to make it hold, or manufacture a metal profile to connect the beam with the wall plate? Does anyone know how such a problem is normally fixed? I have searched online but can't find any ready-made solutions.
