Which glulam beam for balcony?

[Stefan1972]

Is it expected that something might happen on the mentioned balcony as well in the above example? A few mm deflection sounds more like we're talking about the self-weight of the balcony itself.

 

[Lulaua]

Is it expected that something might also happen on the mentioned balcony in the above example? A few mm of deflection sounds more like we're talking about the weight of the balcony itself.

Exactly, it's more about cm, approximately 3cm as the maximum deflection under maximum live load for 115x315 and about 2cm for 115x360.

 

[anderslofwall]

Exactly, it's more about cm, roughly 3cm as maximum deflection at maximum useful load for 115x315 and roughly 2cm for 115x360.

It sounded like there would only be decking on the balcony, and then we're not talking about cm in deflection but rather a number of mm. But if it's going to be loaded to the max as the beam holds, it will of course result in more deflection, but as mentioned, it didn't sound like that was the case?

 

[Lulaua]

Sounded like there would only be decking on the balcony, and then we're not talking about cm in deflection but rather a few mm. But if it is loaded to the max the beam can hold, of course, there will be more deflection, but as I said, it didn't sound like that was the case?

The case is a balcony that should be usable, right? The live load for a balcony is 3.5kN/m2. A bit more than just the decking.

 

[Rumpnissen]

No worries!
I'm in the midst of building a deck structure, and here you can see what I mean by hanging the structure with joist hangers on the laminated beam to avoid losing ceiling height. In other words, this way you don't have to place the joists on top of the laminated beam.

Nice, thanks for the picture. It seems like a great way to avoid losing height under the balcony.

 

[Rumpnissen]

Sounded like it would only be decking on the balcony, and then we're not talking about cm in deflection but rather a few mm. But if it's going to be loaded to the beam's maximum capacity, of course, there will be more deflection, but as I said, it didn't sound like that was the case?

On the balcony, there will be a table for 6 people and some smaller outdoor furniture. But I'm aware that you have to calculate with a high load, of course.

 

[Rumpnissen]

Feedback.

The balcony now looks nice; I built it during week 26. It ended up being supported by three pressure-treated glulam posts, 90x90, with 195 beams screwed on top as the load-bearing beam, and on top of those, screwed beams 170 cc60. The balcony depth is 280 cm from the house wall to the posts. Everything is stable and surprisingly rigid. I don't notice any flex at all, despite the span being on the long side. I made an under-roof with simple sheets from the sheet metal worker in each section and roofing felt on the beams to channel water down to the sheet metal. Everything leads out to the gutter on the front edge and pipes down under the patio, then down into the crushed stone. Initially, I planned to build with wedges but skipped that and took the simpler route instead. A couple of hidealight spotlights and two Sonance Mariner 86s enhance the atmosphere when sitting on the patio below.

Waiting for delivery of the glass for the railing now. 12.76mm laminated tempered. Hope to get it soon...

Thanks, everyone, for your input.