Dimension of beam? HEA, HEB, or HEM?

[LillaNorrviken]

Hello,

Planning new construction and want an open floor plan between the kitchen and dining area.
Need a beam that can handle a span of just over 6.7m.
The beam is intended to rest on the house's load-bearing wall that runs centrally through the house, as well as on the house's outer wall.

Which beam would be suitable here?
Worth mentioning is that there are bedrooms on the upper floor that the beam would need to support.

- The house is a 1.5-story house.
- Snow zone 1.5

Best regards,

 

[fr3dd3h]

A HEA 220, HEB 200, HEM 180 gives approximately similar results with 15-12mm in deflection.
Calculated on a 7m beam. Would not go smaller than any of these, with the risk of experiencing sway on floor 2

 

[LillaNorrviken]

A HEA 220, HEB 200, HEM 180 provide similar results with 15-12mm in deflection.
Calculated on a 7m beam. I wouldn't go smaller than one of these, to avoid experiencing sway on the second floor

If one wants absolute minimal flex, what deflection would a HEM 220 provide?
Is there any downside to having a too thick beam, if it's built into the floor structure and won't be visible?

 

[Gabbe1]

The disadvantages are that it becomes more expensive, heavier, and thus more difficult to position.
For example, a HEM 220 weighs about 117kg/m.

A HEM 220 has about half the deflection compared to a HEM 180.

 

[fr3dd3h]

A HEM 220 would provide approximately 6mm deflection.
A larger beam becomes more expensive and heavier. Then you would need to look further down at the supports which might need to be larger and then to the slab/foundation which in turn might require more reinforcement/concrete etc.

 

[LillaNorrviken]

A HEM 220 would result in about 6mm deflection.
A larger beam would be more expensive and heavier. Then you need to look further down at the supports that might need to be larger and further to the slab/foundation which in turn might need more reinforcement/concrete etc..

thanks so much for the info!

 

[justusandersson]

I think the options are HEA 280, HEB 260, or HEM 220. It is a question of a primary beam which in turn supports other beams. The disadvantage of HEM besides its weight and price is that it is not stocked in Sweden. I would choose an HEA 280.

 

[LillaNorrviken]

I think the options are HEA 280, HEB 260, or HEM 220. It's about a primary beam that in turn supports other beams. The disadvantage with HEM, apart from its weight and price, is that it is not stocked in Sweden. I would choose an HEA 280.

Thanks for the input! I'll investigate the matter further with this information in mind!