I am going to repair a cabin where a wall joist is 4m long and currently consists of two joined wooden beams about 180mm high and 25mm thick (I haven't been able to measure exactly yet), totaling 180mm high and 50mm thick together.
Now it has rotted and needs to be replaced, and I am considering a VKR, KKKr, or maybe IPE beam instead.
I would prefer a square profile over IPE if there isn't much difference in beam weight per meter with the same load.
I also don't know the difference between VKR-KKR tx, or how to calculate it.
I can tell you this is an end of a felt roof that is not built for tile as roof load.
However, I plan to check the rafters and maybe replace them with 21 mm tongue and groove instead of the 17mm that is there now. (I need to replace most of the wood in the roof anyway).
I am a handy amateur who has never laid a roof before..http://www.byggahus.se/images/smilies/blushing.gif
PS:
Here is a sketched drawing of the cabin so you get an idea of the layout:
__ ________________
__| - - - - - -| - - - - -|
__|............|___ __| _ _
|- - I - 4m - -___ __| - - |
|- -i - - - - - |- - - - - | ~4.6m
|__|______|______| _ _|
The dotted line over the 4 (4m long) is where I want to replace the wooden beam with steel (or aluminum if it works better).
The base of the roof trusses is about 4.6m. (unfortunately, I need a lot of extra lines so the spaces don't disappear)
The dashed line under the four is the ridge pole/bearing beam, I believe it's called in technical terms. The house has been extended along the line above the four with a flatter part, and at the joint, it has leaked.
DS.
Best regards
Now it has rotted and needs to be replaced, and I am considering a VKR, KKKr, or maybe IPE beam instead.
I would prefer a square profile over IPE if there isn't much difference in beam weight per meter with the same load.
I also don't know the difference between VKR-KKR tx, or how to calculate it.
I can tell you this is an end of a felt roof that is not built for tile as roof load.
However, I plan to check the rafters and maybe replace them with 21 mm tongue and groove instead of the 17mm that is there now. (I need to replace most of the wood in the roof anyway).
I am a handy amateur who has never laid a roof before..http://www.byggahus.se/images/smilies/blushing.gif
PS:
Here is a sketched drawing of the cabin so you get an idea of the layout:
__ ________________
__| - - - - - -| - - - - -|
__|............|___ __| _ _
|- - I - 4m - -___ __| - - |
|- -i - - - - - |- - - - - | ~4.6m
|__|______|______| _ _|
The dotted line over the 4 (4m long) is where I want to replace the wooden beam with steel (or aluminum if it works better).
The base of the roof trusses is about 4.6m. (unfortunately, I need a lot of extra lines so the spaces don't disappear)
The dashed line under the four is the ridge pole/bearing beam, I believe it's called in technical terms. The house has been extended along the line above the four with a flatter part, and at the joint, it has leaked.
DS.
Best regards
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