Hello. I currently have an existing balcony measuring 6000x2200mm. I'm thinking of tearing it down and rebuilding a similar one. The balcony today stands on 8 plinths with 90x90 posts. There are also bolted beams in hangers on the facade. However, I'm hoping to build the balcony on the 4 outer posts and only one bolted bearing beam on the facade. The question is whether this will hold. I have the usual 0.3kn/m² + self-weight.

Attaching pictures of the existing balcony. I hope someone can help me. I've looked at the wood guide and some other resources but haven’t received any clear answers to my questions through them.
A wooden balcony supported by eight wooden posts attached to a yellow brick house, with a grill and outdoor furniture underneath. Floor plan showing a kitchen labeled "Kök" and a wooden deck labeled "Trädäck," with dimensions 660x220. The deck is adjacent to the kitchen.
 
I think you have more load than 0.3 kN/m2 = 30kg/m2.

The remaining columns, beams, and plinths should hold, as they do not receive any significant load addition. The tricky question is rather how you should attach the ledger board to the wall, both in terms of handling the loads and in terms of moisture.
 
K
General useful load for a deck/balcony is usually 3.5kN/sqm, i.e., 3500N. That is approximately 350kg/sqm.
 
A a_w said:
I think you have more load than 0.3 kN/m2 = 30kg/m2.

Remaining columns, beams, and footings should hold, as they don't get any significant increase in load. The tricky question will rather be how to fasten the bearing beam to the wall, both in terms of handling the loads and moisture.
You could use threaded rod, with or without a threaded sleeve. Tec7 or pl400 or another compound to seal. Loctite in the sleeve if using it. It should be added that there are already bolted joist hangers on the facade at c/c 600. Will be able to use those holes.
 
K kniv said:
General useful load for a deck/balcony is usually 3.5kN/sqm, i.e. 3500N. So about 350kg/sqm.
Yes, I meant 3.0 in my head. Not 0.3
 
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