Unloading glulam beam with only 95-rule. Okay? Quick help needed...

[cederbusch]

Hoping for some quick answers so I can avoid a trip to the building supply store.

I've taken down a wall of standing planks and today I'll be supporting it with a glulam beam. The beam is supposed to rest on a post which, according to the original plan, should stand on a floor joist. This is an old house, so the floors are solid structures. But I would prefer to block between two of these floor joists and let the post stand on this blocking to allow two joists to bear the weight. I probably don't have anything thicker at home than 45x95.

Is it sufficient to hang 2 of the 95s in joist hangers and then place the post on these?

Hope you're following my question...

 

[mycke_nu]

Short answer: 95 mm is probably too weak. Use kortla with the same dimension (height) as the floor joists.

45x170 is, for example, 8 times stiffer than 45x95, so even double 45x95 (i.e., 95x95) only gives half the strength.

Possibly you can glue together two 45x95 to make 45x170.

 

[cederbusch]

Ah, gluing together two 45x95 was a good idea perhaps. I think the floor joists are 8x25 cm and have a slightly larger center-to-center distance.

But that's probably how it will be. 2 beams which in turn consist of 2 45x95 that hang in joist hangers. Thanks for the quick response.

 

[cederbusch]

Consulted the wood inventory and actually found glulam beam 56x180, so that's what it will be. The question is whether 1 is enough or if I should try to fit both in some way.

 

[JOW]

How far apart are the floor joists?

 

[mycke_nu]

Consulted the timber stock and actually found laminated beam 56x180, so that's what it will be. The question is whether one is enough or if I should try to fit both in somehow.

It doesn't hurt if the column has a solid surface to stand on. With slightly beveled ends and beam shoes for 95 mm (if such exist) it should work well.

 

[MathiasS]

Putting joists between beams and placing a post on it feels wrong. What are the beams resting on? Place the post there instead.

 

[hempularen]

Depending on the length of the section you open up, there can be a very large load on its suspension in the floor. It's not certain that joist hangers and nails will suffice.

 

[cederbusch]

I have now checked a bit more and measured. The floor joists are approximately 60 cc (50 cm free space between them).

It will be about 3 meters that are offset for the truss, i.e., 1 truss. I want a post there. Then a beam continues to the outer wall, barely 2 meters. That means there will be a splice at the post.

I have now screw-glued 45x45 along the floor beam, screw-glued together 2 laminated beams 56x180 resting on the 45-rule. Each laminated beam is screwed with 3 screws through the floor beams. I applied a bead of glue to the short sides before I knocked the laminated beams into the joist. What do you think about that?

There will also be a new interior wall of about 1 meter along the laminated beam, which is 3 meters. Not constructed to be load-bearing, of course, but it should stiffen the whole thing a bit. It will also be clad with chipboard.

 

[cederbusch]

A simple sketch

 

[cederbusch]

Placing a support on kortla between beams feels wrong. What are the beams resting on? Place the support there instead.

They rest on the outer wall (plank wall) and the heart wall on the floor below. A span of maybe 4.5-5 meters. The glulam beam runs across the middle of the floor approximately.

I could have had a longer glulam beam extending to the gable wall and anchored it there. But it's problematic to get such a long beam into that space, so I divided it.