I wonder how much a standard truss model framework 195 mm with a center-to-center distance of 60 cm on a garage with a 27-degree roof pitch can bear. I received a response from the company that manufactures trusses stating that it is possible to walk in the attic (we have laid floorboards on a part of the attic), but they do not recommend storage in the attic of more than 50 kg/m2. How does that add up? It's worth mentioning that those of us planning to walk in the attic definitely weigh more than 50 kg...
Was it the same company that answered your question that made the trusses?
How much you can load depends on the truss's design, so it's tricky to set a general number.
When I had trusses manufactured (at a truss factory) for my garage, I gave them the conditions:
CC 800. Concrete tile roof + tongue and groove outside and k-plywood + plaster inside.
After payment
I received the drawing where all the components are specified and where they lie percentage-wise regarding margins for buckling, bending, & tension.
Without such documentation, the answers you get will likely be mostly general guesses.
How much you can load depends on the truss's design, so it's tricky to set a general number.
When I had trusses manufactured (at a truss factory) for my garage, I gave them the conditions:
CC 800. Concrete tile roof + tongue and groove outside and k-plywood + plaster inside.
After payment
I received the drawing where all the components are specified and where they lie percentage-wise regarding margins for buckling, bending, & tension.Without such documentation, the answers you get will likely be mostly general guesses.
In addition to what @huggan writes in post #2, I would like to point out that the duration of the load is very important. There is a table on this in the wood guide. https://www.traguiden.se/globalasse...nering-enligt-eurokod-5/3_lastvaraktighet.pdf
I wanted to hear opinions here in the forum. The garage we ordered from a house manufacturer in Lithuania, very solidly built with first-class materials and by skilled craftsmen. The drawings we received are straightforward, but they're not as detailed as those from Swedish manufacturers. It was the project leader at the factory who suggested flooring the attic since we have about 1.7 at the highest point there and can use the attic for storage. Therefore, I was a bit surprised when he wrote that you shouldn't load the floor too much. I also thought there's a difference in long-term load, but my first reflection was that his answer was to be on the safe side, rather than what the trusses actually can withstand.
Checked the links that were recommended but didn't find any table or description about the attic floor and load inside the attic.
Checked the links that were recommended but didn't find any table or description about the attic floor and load inside the attic.
50kg/m2 is a normative load for attic spaces that can only be accessed via a hatch. These 50kg/m2 should be in addition to the self-weight of the floor structure and are referred to as imposed load. Are there any self-weights specified on the drawing or can one see the floor structure buildup?
Thank you, that was what I was wondering - if the answer I got was a "standard answer".
I see no problems with roof trusses over the garage, now there is raw board on about 2/3 of the attic.
I compared with the truss plan for the house we are building (Anebyhus) and noticed that the trusses are closer over the garage and are 45x195 even though the span is only 7m.
I see no problems with roof trusses over the garage, now there is raw board on about 2/3 of the attic.
I compared with the truss plan for the house we are building (Anebyhus) and noticed that the trusses are closer over the garage and are 45x195 even though the span is only 7m.