I am currently planning my garage. Material: aerated concrete blocks: 24 cm Garage door width: 3.50 m Wall length: 5 m.
Above the garage door will be an open wall 1m long. Behind it is a flat roof. Therefore, the supports for the beams are the two side walls, not the lintel. Now my question is: What iron mesh should be placed in the U-shaped shells? I know this has to be calculated by a structural engineer. But perhaps there is someone here who has already built something like this. No guarantees should be made here. I just wanted to get some experience. It's not going to be a skyscraper.
The U-shaped shell is a ring anchor. It holds everything together. There are pre-made braided steel mesh baskets for this. That should suffice. Since this is a standard situation, there are also standard irons for it.
This is not a standard situation, although various 3.5m wide gates have been passed, nor are there standard irons for this. Also, the lintel probably serves a different function than supporting the stones stacked above it. If you can't assess this yourself, you should consult a structural engineer