ᐅ Double carport made of galvanized, coated steel with a flat roof

Hello Forum,

Our carport project is finally underway, and I have a few questions.
It will be a double carport made of galvanized, coated steel with a flat roof.
Two sides will be enclosed, either with wood or metal slats; this is yet to be decided.
The size will be approximately 6.60 meters (22 feet) deep by 6.20 meters (20 feet 4 inches) wide.
Due to its size, it cannot be attached directly to the house.
Therefore, I will need at least four foundations.
There will be two foundations near the house side, very close to the concrete slab, which is insulated with XPS.
What can I place between the foundation and the concrete slab to ensure long-term protection?
Could the slab be affected in any way if two foundations are located close to each other?

How large are your carports?
How many additional meters (feet) would I need to create a small storage space for trash bins and a bicycle?

Thank you very much for your answers.
Best regards

A length of 9 meters (30 feet) is usually the maximum if the structure is built directly on or within 3 meters (10 feet) of the property boundary. If it is located in a corner, you need to be careful, as the maximum allowable boundary construction length (I’ve read something about 15 meters (50 feet)) can be reached quite quickly.

What type of foundations are you planning to install? Four individual ones? One for each post? Each post should have its own foundation; otherwise, the post wouldn’t serve its purpose. The foundations usually aren’t a problem since they tend to be relatively small. How much distance do you want to keep from the house?

With a length of 9 meters (30 feet), you can just fit both a carport and a shed. With 6.6 meters (22 feet), it will be tight for the shed if you only have space for the car. Also, consider the overhang at the back of the shed.

It will be built right next to the house. The upper beam will be securely attached to the house for safety.
Two posts per side would be sufficient, but due to potential wooden cladding, there might be three posts on one side.
Of course, each post will have a proper frost-proof foundation.
The rear roof overhang will be very small because the house ends there, and it should not extend beyond that.
However, I could allow for a one-meter (3 feet) roof overhang at the driveway.
That would give me 7.60 meters (25 feet) of parking space.
Is that enough room?
For a bicycle and a trash bin.

meister keks schrieb:
It is placed directly next to the house. The upper beam is secured to the house for safety.

As long as the beam with posts stands on the ground, this works perfectly. The attachment to the house must be into the floor slab. A cladding is not a load-bearing wall but purely for aesthetics.

Two posts on each side would be enough, but due to possible wood cladding, there might be three on one side.

I think 2-3 posts over 6 meters (20 ft) is really too few. It’s common to have one every maximum 2 meters (6.5 ft), often 1.8 meters (6 ft) for standard fence elements, so at least four per side.

Of course, each post will have a proper frost-free foundation.

The foundations don’t need to be very large. For us, each hole had at most half a bag of concrete. However, they worked in reverse: first the carport was set up, then the posts were installed and afterwards the concrete was poured. The carport stood on stilts in the meantime. Any alignment or similar was omitted.

The rear roof overhang will be very small because the house ends there and it should not extend beyond.

As long as there is no wall or something similar there, it isn’t really a roof overhang. With a wall (e.g., a shed), the overhang must be a bit larger to prevent rain from getting in at the top.

Then I would have 7.60 meters (25 ft) of parking space.
Isn’t that enough for a room?
For a bicycle and a trash bin.

For walls, you will need more foundations again because it has to be fixed somewhere. Our carport, for example, has 22 posts and therefore exactly as many foundations. Just for one door, you need two posts...
I don’t know if a 1-meter (3 ft) deep shed is enough for you. I find that rather ridiculously small. Over time, more will end up there, like garden chairs, grill, garden tools such as wheelbarrows, and so on...

Payday schrieb:
garden tools like wheelbarrows, etc...

Sometimes you end up pushing them into the shed ;-)

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That was obviously intentional.
Everyone knows it’s called a wheelbarrow.
Muahaha