Sizing of load beam (in steel) for balcony

[OG72]

Hello everyone,

I am going to build a balcony with the following specifications:
Width: 6m
Depth: 2m
Distance between facade and post foundation: 1.8m
Number of posts: 2 (with 6m in between)
Max height of the finished construction: about 250mm (including decking and ceiling)
Decking: 28 x 120 or 28 x 145
Waterproofing: metal between beams
Ceiling: Z-panel 22 x ??
Snow load: we live in Göteborg

I am wondering if someone can help me size the main beam between the posts and also the joists.
Having tight distances between beams is okay, meaning it doesn't need to be CC 600mm.
My idea is to use a steel beam (HEA?) as the main beam.
If the construction becomes too high due to the sizing, I think we can reduce the depth of the balcony to about 1.8m and position the joists in the HEA beam.

We are grateful for any help we can get 😃/Olof

 

[Gabbe1]

Welcome to the forum,

What is the idea behind the balcony, is it just a wooden deck where you sit and sunbathe/have coffee, or is it meant for some other kind of load?
For example, a hot tub of 5m3

 

[OG72]

Thank you,
The idea for the balcony is to have a table and some chairs to be able to have breakfast.

 

[Gabbe1]

Ok, I have calculated with a load of 300kg/m2 considering the snow load during winter. Then I calculated that 9m2 of the balcony loads the beam, which is on the higher side since I assume there will also be a load-bearing beam attached to the house wall? But better safe than sorry.

This means that an HEA180 is required if you want to keep the deflection within the standard length/400.

 

[SBH]

Hello everyone,

I am going to build a balcony with the following specifications:
Width: 6m
Depth: 2m
Distance between facade and post foundation: 1.8m
Number of posts: 2 (with 6m in between)
Max height of finished structure: approx. 250mm (including decking and underroof)
Decking: 28 x 120 or 28 x 145
Raindrop protection: sheet metal between beams
Underroof: Z-panel 22 x ??
Snow load: we live in Gothenburg

I am wondering if someone can help me design the beam between the posts and also the flooring structure.
Having beams close together is fine, i.e. it doesn't have to be CC 600mm.
My thought is to use a steel beam (HEA?) as the beam.
If the structure becomes too high due to the design, I think we can reduce the depth of the balcony to approx. 1.8m and place the flooring structure in the HEA beam.

We are grateful for all the help we can get 😃/Olof

even though we have many with great expertise here, I wouldn't trust any calculation from any forum or site.
Better to consult a designer or a construction smith who has worked with it.