Homemade light beams

Gabbe1 · 2021-05-02T13:17:59+00:00

Since I am in the midst of manufacturing 36 lightweight beams, I thought I'd take the opportunity to post a thread about it. Consider it more as advice than a directive, since we are talking about load-bearing building components, careful consideration is needed before embarking on such manufacturing. Additionally, I'm not sure if there are financial savings in self-manufacturing; for me, the main motivation has been that it's fun to make things myself and that it's nice to have a tailored geometry for the beams. The beams are intended to form the rafters in a future holiday home of 100m2, alongside a ridge beam, the rafters will form the skeleton for a 34-degree pitched roof. The construction of the beams consists of two 45x70 placed vertically with nail-glued OSB on each side. According to Steiner's theorem, the moment of inertia for the construction is about 17400 cm4, which can be compared to a 45x220 rule that has just under 4000 cm4, in other words, they are quite sturdy beams. In this calculation, I have not considered the extra moment of inertia that the OSB boards may add, so in practice, the difference might be greater, but it's good to have a margin. The ingredients (for 36 beams) are as follows: -200m 45x70 C24 (must not be spliced so the length of the wood must be adapted to the construction) -48 OSB 1197x2500x11 each cut into three equal parts. -about 4000 machine nails 2.8x50mm -about 10l outdoor wood glue/white glue (there are probably many different glues that do the job) -6 packages 1165x565x45 insulation slabs Total cost 17070 SEK and about 100 hours of work. When assembling, it helps a lot to first spend some time building a fixture. It's important to have a completely flat surface, the shape the beams have when the OSB sides are mounted will be retained, hence the importance of a flat surface. Do not hesitate to come with suggestions and/or questions if you have any thoughts.

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Orem Lipsum

#46

Member

· 5 posts

5 Jan at 8:40 AM

Orem Lipsum

Member

5 posts

5 Jan at 8:40 AM

V vanpire said:
Looked around a bit and found these:
[link]
Looks very cheap but probably depends on the shipping cost.

According to the website 500 €. Within Europe

Homemade light beams

Orem Lipsum

Orem Lipsum

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