Strength VKR-column

[gunneriusson]

Hello!

We are in the process of building a new stable. The flooring and roof will be supported by glulam beams. These have been calculated. Now I'm considering the choice of steel columns to support the glulam beams.

I'm thinking of using VKR 100x100x8. Can someone calculate the load capacity of a 2.4-meter and a 4.2-meter long column like this (standing fixed at both ends...)?

Thanks in advance!

/Joakim Gunneriusson

 

[Granngubben]

Google Tibnor Construction Tables!

In it, one can read that a column, VKR 100x100x8, steel S355, L = 2.4 m has a load capacity of 582 kN in safety class 3. Likewise, with L = 4.5 m, it has a load capacity of 244 kN in safety class 3.

 

[prototypen]

Computationally, they are not fixed at both ends; if you cast the column into the concrete, it is rigidly fixed at one end, but the base plate is poorly attached. Against the glulam, it is not fixed, rather quite the opposite if the glulam wants to bend down the column. It is the risk of buckling that you are designing for.

Now, I don't know what input Tror jag fattar has had in the calculation.

Protte

 

[Granngubben]

The load-bearing capacity above applies for pinned-pinned, so buckling length is 2.4 m and 4.5 m respectively. Would never dare to calculate with fixed connections without more information about the attachments. I interpreted "fixed at both ends" as the column ends being held laterally, not that they are rigidly fixed.

 

[gunneriusson]

Thank you so much for the quick response. I guess I can sleep well then, since I will have four such pillars to support the loft (13x7 meters). The outer walls also support the loft. The long one will support the ridge beam in the middle (which also affects two of the loft's pillars, but these seem to be greatly over-dimensioned).

 

[prototypen]

The load-bearing capacity above applies to hinged-hinged, i.e., buckling length 2.4 m respectively 4.5 m. I would never dare to calculate with a fixed restraint without further information about the attachments. I interpreted "fixed at both ends" as meaning that the column ends are held fast laterally, not that they are fixedly restrained.

So good, we are in complete agreement, I was a little worried about "fixed at both ends."

Protte