Help with sizing of HEA beam

[PL600]

Hello,
I'm planning to build a two-story Attefall house, and to get as much ceiling height as possible, I'm considering a steel beam construction in the mid-floor joist.

The house will be 7.5 x 4 m, and the idea is to have some type of HE (A or B) Beam for the 4-meter span.
I would like a maximum height of 100 mm, i.e., an HEA 100 or HEB 100 beam.
I'm thinking of having 600mm between the beams.
The upper floor will be a bedroom and living room (sofa, table), not sure what weight to account for...

Number of beams: 7.5/0.6= 13.5
Span: 3.8 m (if resting 10 cm on each side (c 20 cm thick wall)

Is there anyone who can help calculate if an HEA 100 is sufficient?

Best regards,
Fredrik

 

[justusandersson]

Yes, HEA 100 is sufficient. The deflection is at the limit. However, it is not a cheap solution. The steel costs over 20,000 SEK.

 

[PL600]

Ok, thanks
do you have a bit more details about the calculation, how much load and what deflection will it approximately be?

started looking in this table but haven't quite managed to figure out deflection etc...

https://ssabwebsitecdn.azureedge.ne...truktionstabeller-2018-2.pdf?m=20191010080905

Regards
Fredrik

 

[justusandersson]

I calculated with a distributed load of 2kN/m and a maximum deflection of 7.4 mm. Applying the deflection criterion, the result is slightly over 1.5 mm. The steel tables are usually not useful for such small loads.

 

[PL600]

I calculated with a distributed load of 2kN/m and a maximum deflection of 7.4 mm. Applying the deflection criterion, the result is just over 1.5 mm. The steel tables are usually not useful for such small loads.

Ok, sounds good.
Many thanks!!