Steel beam 9m span?

[attefall]

Is the attic already furnished? Otherwise, you could lift up a substantial beam in the wall and place the terrace on the lower flange. Additionally, you could further insulate the gable and include the energy improvement in the extension. I also think it would be easier and result in a better outcome if the entire gable wall was removed and new walls were built. There isn't really much gable left, anyway.

The attic is already furnished. However, it is probably in need of a surface renovation anyway, so damaging that wouldn't be the end of the world. But where exactly do you mean that the beam should be? On top of the floor joist?

 

[bossespecial]

Instead of having the terrace on the upper flange as it currently is, the beam is lifted and the terrace is placed on the lower flange. It needs to be drawn to see how it looks, but there is a risk that the top of the beam ends up above the top of the floor slab, resulting in an intrusion on the wall above the floor slab.

 

[attefall]

Instead of having the terrace currently on the upper flange, you lift up the beam and place the terrace on the lower flange. You'll need to draw it up to see how it looks, but there's a risk that the top of the beam ends up above the top of the floor slab, which would require modifications to the wall above the slab.

You're talking about that HEB220 at 6.6m on the house's gable? If so, I'm with you.

In order to lift it up, you'd also need to lift up the shorter beam supporting the heart wall, and as you mentioned, that's a bit trickier. Alternatively, a post to support it at the intersection?

 

[bossespecial]

Exactly. If you also place a pillar, the long beam becomes a little smaller as well.

 

[attefall]

Exactly. If you also add a pillar, the long beam becomes a bit smaller as well.

I was also considering something like that from the start. I would preferably avoid the post, but as with many other things, it's a compromise I could make if it provides enough benefit.

However, it's mainly worth the effort if the room height in the extension remains the same as in the house. If it's lower, you might as well have a beam in front. But maybe there is another benefit to embedding it too?

 

[bossespecial]

If you don't want columns and don't want to recess the cross beam into the floor structure, you can hang it in the large beam. But as mentioned, you need to draw various sections to see if it all comes together.

 

[attefall]

Can't let go of adding another support beam in the middle. In that case, I should probably be able to use regular construction timber for the beams, right?

If I place the front support beam on 4 posts, it should be able to be significantly dimensioned. However, the middle one can't really be placed on posts, so I assume it would end up at about HEB240 and still be quite troublesome.

 

[bossespecial]

The consequence, unfortunately, is that this beam may be equally or even larger depending on how one chooses to place the ceiling joists (provided that what has been proposed is correct). So unfortunately, such a beam doesn't contribute anything.
Another issue that needs to be resolved is stability. Opening up larger parts of the gable on the house and having only one wall in the extension makes it a bit challenging. So still having steel facilitates solving this.
One could solve this by anchoring the pillars into the foundation, or alternatively, making a frame including the beam. In the house gable, one could take down the wall segment and put up a cross.

 

[attefall]

The consequence, unfortunately, is that this beam becomes equal to or even larger depending on how one chooses to lay out the discovery joists (Provided that what has been suggested is correct). So unfortunately, such a beam does not contribute anything.
Another point that needs to be solved is stability. That most parts of the gable of the house are opened up and that there is only one wall in the extension makes it a bit challenging. So still having steel makes it easier to solve this.
One could solve this by anchoring the pillars in the foundation or alternatively making a frame including the beam. In the house gable, one could remove the wall stump and put in a cross.

Ok, suspected that it might not help much.
Regarding stability, I guess a post at the junction between the core wall and the gable would help a bit?

Thanks once again for all the help!

 

[bossespecial]

Let's hope it's of some help at least so we don't just make things more confusing for you

A post in the meeting I don't think contributes much since you would want this to be as small as possible. Otherwise, it would be relatively substantial. If you have the opportunity to do something in the wall by the laundry room, this would significantly simplify things regarding stability.

 

[attefall]

Let's hope this is of some help at least so we don't just confuse you

A post in the meeting I don't think contributes much since you would want it to be as small as possible. Otherwise, it would become relatively substantial. If you have the opportunity to do something in the wall by the laundry room, this would considerably simplify stability.

The laundry room will be torn down and completely remodeled internally, so if needed, that wall can also be rebuilt.

Haha, yes it is a bit confusing, but better to be confused now than at a later stage

 

[justusandersson]

It can be twisted even more! What is the main purpose of the balcony? If it's to get up in the air to have a sea view, that can be solved in a much simpler way. Personally, I would never consider combining a garden room with a balcony, because I know that these room types are not really compatible.

Many important remarks from @bossespecial about the need for stabilizing measures and the paradox that an additional support beam is not an advantage.

 

[attefall]

It can be twisted even more! What is the primary purpose of the balcony? If it's to get up in the air so that you have a sea view, that can be solved in a much simpler way. Personally, I would never consider combining a garden room with a balcony since I know these room types are not truly compatible.

Many important points from @bossespecial about the need for stabilizing measures and the paradox that an additional load-bearing line is not an advantage.

The purpose is to have a place with more evening sun and views. A place that can eventually be accessed from the upper floor as well. Simply an extra terrace with a bit different sun opportunities.

 

[justusandersson]

But then it doesn't need to be that big. Build the garden room with a metal roof with low pitch and create a fun balcony somewhat like a lookout point. It can become more attractive, more useful, and much simpler.

 

[attefall]

But then it doesn't need to be so large. Build the garden room with a seam-covered metal roof with a low pitch and create a fun balcony somewhat like a lookout point. It can be nicer, more useful, and much simpler.

However, it gets more evening sun, especially at dinner time, and I think it would be very nice to have a table there among other things and just hang out overall. I don't think it will seem too large. That said, there is of course a limit to how much one is willing to pay for it, and it would be foolish to simply go with whatever it costs. But first, I would like to get a better understanding of what would be required to build it as planned before making a final decision.

A balcony would also be nice, and I assume that since the useful load is lower, it can be dimensioned more easily? But there really isn't much more room for a thicker floor structure and more slope, the height of the gable and the attic floor still limit it. Another advantage of a terrace is that when a door from the attic is added, it also becomes an extra entrance to the house, directly to the attic which can then be more easily made into a somewhat more separate living space for a teenager or even rental. Although these plans aren't on the table now and there are other things that would have to come first, I would still like to have that possibility in the future.