Load-bearing beam window

[mattiasohult]

I'm going to install a large window and now I'm wondering how I should brace the truss.

Which of the following methods should I use to brace it, or should I do it in a different way?

 

[mattiasohult]

bump

 

[stugfar]

Here I wish that the late Justus could provide some input, I don't think many on the forum can give you a calculated answer. I guess that option 2 is the most common.

 

[bossespecial]

Alternative 2, also remember to check that the wall rule holds as the beam is intended to be laid up on.

 

[AG A]

Alternative two. No complications.

 

[mattiasohult]

Option 2, also don't forget to check that the wall beam holds as the beam is intended to be placed on it.

It's a 45x170, but it should work, right?

 

[AG A]

It's a 45x170, but it should work, right?

Now I suppose I should be completely sure. How wide is the intended window?

 

[mattiasohult]

Now, I should probably be completely sure. How wide is the intended window?

2400mm

 

[AG A]

2400mm

That was quite large. Do you have a light sheet metal, felt roof, or heavy tile, concrete roof? Single-story house, or 1 1/2-story?

 

[mattiasohult]

It was pretty big. Do you have a light sheet metal, felt roof, or heavy tile, concrete roof? One-story house, or one and a half story?

It is concrete tiles. One story with free-standing roof trusses.

It's a bit unclear if it's 1 or 2 trusses that are being transferred

 

[AG A]

These are concrete tiles. A plan with self-bearing roof trusses.

A bit unclear if it's 1 or 2 trusses that are spliced

Unfortunately, I think you might need to install a glulam beam instead. It's quite a substantial load that needs to be supported. Without proper data, I unfortunately can't assist you further.

 

[mattiasohult]

It is offset for a couple of windows & doors from the factory (gullringshus built in '79). There, offsetting has been done according to alternative 1, there shouldn't be much of a difference, right?

 

[BirgitS]

The length of the avväxling has a very significant impact on how much load it should withstand.

Legally, all modifications to load-bearing structures must have an approved building notification before work begins.

 

[mattiasohult]

Received the recommendation to glue & screw together 2 pieces of 45x220 beams to make my own glulam and follow option 2.

So this is something you wouldn't advise me to do?

 

[BirgitS]

That is something that must be calculated based on roof load including snow, etc., and a structural engineer is best suited for that.