Garage connected to the house - Where is the roof support attached?

hello,

I would be interested to know what has become of your project in the meantime.

I am facing a very similar undertaking, but I also have to cast the slab myself and the house is already completed. (Also 36.5 cm aerated concrete + exterior plaster, without ETICS)

Beam shoes or similar were not embedded. The house is "finished" and closed in itself. Only the side entrance door through which you can later access the garage has been installed.

I was also advised by experienced acquaintances and friends to at least involve a structural engineer.

One idea I was told (in addition to those already mentioned here) is to bridge this (for me as well) approximately 7 meters where the 4th wall should stand with a steel beam. That would save intermediate supports and still allow the creation of a continuous, four-sided ring beam.

However, I was made aware that steel beams are a comparatively expensive matter.

So, in this whole thing, my last word has not yet been spoken either.

Another topic would be the passage to the house.

The current side entrance door installed by the General Contractor will definitely remain for now. It has to stay, for the upcoming blower door test.

However, I was told that I would need a fire-resistant (FH) door if I want to connect living space and garage space.

But FH doors are apparently not sealed well enough to pass a blower door test. Maybe I really have to build this 4th wall of the garage up to my house exterior plaster and then install an FH door in the garage wall. Two doors directly behind each other would of course be awkward. Does anyone here have an idea?

FH doors are apparently not sealable enough to pass a blower door test.

Apart from the fact that they are not built for this stupid test anyway: why should an FH door in particular not be made gas-tight or smoke-tight? – I consider that a rumor.

hello,

I would be interested to know what has become of your project in the meantime.

[...]

Does anyone here have an idea?

Hi Ballerburg,

it's been a while since I was here. I hope it’s not too late for you.

I haven’t completely finished my garage yet, but I would still like to share the execution with you (and other seekers).

Our planning has been adjusted a bit for the statics. The plan was to build the garage with an open partition wall that has no connection to the house, so it stands freely.

Currently, this is what has come of it (see sketch attached):

The front wall has received a reinforced concrete support at the house wall. The rear wall has also received a reinforced concrete support as a connection to the house wall. And the partition wall will now have a somewhat smaller passage than planned (1.30m → 1.00m) but will have a masonry pillar and a door lintel. The whole will be closed at the top with a (at least) 15.5*20cm ring beam. The rafters (12/24) will then run longitudinally over the garage. So they rest on the house on the reinforced concrete support, masonry pillar and rear wall. Therefore, the longest span to be bridged is about 6.30m.
The walls are, contrary to the free planning from the initial post, all around and inside 17.5cm walls.
The rafters are planned with a rafter joint on the partition wall, but I will probably rather use continuous rafters to avoid the weak point.

When creating the foundation slab, at the two places for the supports, reinforcement steel for the reinforcement cage was already cast in, but you can also do that afterward. For the supports, I have already cast in angle steel in preparation for the upcoming ring beam, so that the force-fit connection between the anchor and the supports is guaranteed.

Preliminary information:
City villa (built in 2019)
36.5 cm Poroton without insulation with silicone resin plaster

Garage (built later as DIY)
6.50m * 9m
24.5 cm Poroton
1 interior wall 11.5 Poroton
wood flat roof
access to the house

The base slab will be created directly for both objects by the general contractor.
A sketch of the garage location relative to the house is attached.

When we were planning to add the garage later, we had always thought of 4 walls.
Now we have been advised again to build the garage without a separate wall attached to the house.
I would prefer this option anyway, as it would provide 25 cm more space inside.
Now to the question that concerns me:

Where/how is the roof fixed/supporting on the house side?

Is the purlin now omitted and the rafters fastened to the masonry with joist hangers?
Is that enough to carry the load?

Or is it possible to create internal joist hangers by cutting the bricks in the house wall so that the rafters rest inside the house wall? (But there would have to be quite a few. That does not look good before building the garage, I think.)

What other options are there?
I can’t just screw a purlin to the house with screws the thickness of reinforcing bars, can I?

Yes, we will also discuss this with the architect and/or general contractor, but I like to go into such a conversation with some prior knowledge before I’m sold a pig in a poke.

Thanks for your info.

Hello Patkia, the post is a bit older, but I just wanted to ask how you decided or how you solved your garage.

Hello Patkia, the post is a bit older, but I just wanted to ask how you decided or how you solved your garage.

Hello Eberhardt, The garage is now almost finished (except for the garage door with incredibly long delivery time). What do you want to know?

Hello Eberhardt, the garage is now almost finished (except for the garage door with incredibly long delivery time). What do you want to know?

Sorry, I hadn’t seen your last post, where you already described how it turned out for you in the end. "The walls are, contrary to the free planning from the initial post, all around and inside 17.5 cm walls." Do I understand correctly that the 17.5 Poroton bricks were structurally sufficient for this, but that you nevertheless needed the reinforced concrete support and the masonry pillar etc.? So you don’t have a wall between the house and the garage now? I also have a new build with 36.5 cm Poroton without insulation, and the garage is supposed to be about 5.6 m wide x about 9 m long and I need every centimeter in width, and I also wanted to build without a wall to the house... The floor slab for the garage was made separately from that of the house, right? Do you perhaps have a photo of the garage from the front showing how it is attached to the house? Many thanks,