Choice of beam

[Derbyboy]

I think I can fit an HEA12, but of course, it will be cheaper with a 100.

If I wanted to replace an IPE100 with a UPE, what dimensions would be required for that?

 

[scorp1on]

It will be a corresponding UPE100. With a UPE80, you get a deflection of about 9 mm.

 

[scorp1on]

Keep in mind that an IPE beam is very prone to buckling, so make sure to brace it properly when attaching the roof. Meanwhile, a UPE beam is prone to twisting.

 

[Derbyboy]

Thank you so much!

Should a UPE-beam lie like a U or stand like a C?

Looking here, they are depicted lying down, but it feels a bit strange.....

https://www.armeringdirekt.se/stal/balk/upe

 

[scorp1on]

I don't have any practical experience, but technically it's better if it lies down; then it depends a bit on how you want to design your construction.

 

[Derbyboy]

Lying down? Like a bowl, meaning a U?

 

[Gabbe1]

No no, it has to stand up (like a C) if it is going to be comparable to an IPE, which of course is also mounted standing.

 

[Derbyboy]

Do you think it's possible to glue aluminum profiles on the top edge of an IPE?

I don't want the roof to lift, and with IPE, it's difficult to screw or rivet....

https://www.hornbach.se/shop/Kantpr...MIoJ3m-sfP9QIVAWIYCh0Fxw3cEAQYAiABEgLJ0vD_BwE

 

[justusandersson]

I would not use either HEA, IPE, or UPE. They are all less suitable in this context. It also wouldn't look good, more like a steel exhibition. I would use square tubes, VKR.

 

[Derbyboy]

I thought a steel exhibition might be a bit cool but on second thought you're absolutely right! ....as usual.

What dimension should I choose that corresponds to:

bärlina (HEA 120)

taktegel (IPE 100)

I guess it becomes a weight/price question vs the visual.

Best regards

 

[justusandersson]

HEA 120: VKR 150x100x5. IPE 100: VKR 100x50x5. When it comes to VKR, there is a large number of combinations if you also consider the wall thickness in the choice. It is advisable to choose the best stiffness per kilo. VKR 150x100x5, for example, weighs less than 140x80x6.3

 

[Derbyboy]

Then the height becomes 25 cm (15+10), which is too high, unfortunately.

Would 100x100x10 work?

 

[justusandersson]

No, but the combination 120x120x8 and 80x80x7.1.

 

[Derbyboy]

VKR becomes significantly heavier than HEA for the equivalent bending stiffness.

VKR 120x120x8 27 kg/m

HEA 120 19 kg/m

 

[justusandersson]

It's your build. You can do whatever you want. Sleep on it, it usually helps!