Is it OK to make a balcony with a steel partition?

The foundation strength and structural strength meet the requirements of the steel structure of the duplex balcony will not collapse.

Of course, if the balcony is in strong sunlight, just install a layer of blackout curtains.

Neighbors agree to it.

The reason for the leakage of the tiles of the balcony should be that the waterproof layer at your balcony is not done well, and the quality is not up to standard, so the water leakage phenomenon is involved, and the solution can only be to knock out the old bricks and re-do the waterproofing and then paste the new bricks, rather than the problem that can be solved by sticking another layer of bricks.

No, you can't block the sun's rays, ultraviolet rays. If you are far north and you can't get the sun, you can.