I'm considering adding a floor on top of the balcony, which would result in a span of 7 meters. Is it even worth thinking about building trusses for that?
I suspect it might be difficult to bring in a truck/crane here...

I saw a construction description for a 6m truss where they built it on the floor joists and then hung them upside down on the walls. They were built with 2"9 and had only two intermediate joists. Do you think the same construction would work for 7m?
 
There is a book published by Byggforskningsrådet called "Takstolsboken" that contains all types of roof trusses and how to dimension them.

I have personally built my own 7-meter roof trusses using it.
Economically, it costs the same as buying ready-made trusses from a woodworking company that builds trusses, and you avoid the work.
If you have your own timber, it’s a completely different matter, and you can choose your own dimensions and designs according to taste.
 
Under my father-in-law's skilled leadership, we built trusses that were 8 meters, so it's definitely possible. Unfortunately, I'm not much help otherwise since this happened in 1986 and I don't have any drawings and don't live in the house anymore either, but as I said, it's completely doable.
 
Though I don't see the problem with buying ready-made ones? If you can get the material there to build, you can surely get a ready-made one there too? They're not bigger than you can take them on the roof rack if needed...
 
I am happy to buy pre-built, especially if it costs about the same as making my own. What I was thinking was just that they must be pretty heavy to lift 3 meters up in the air, or aren't they? How have the rest of you done it, did you lift them manually?

That's why I thought of building my own, because then you can do it on site.

Tossegubbe: They must be at least 7 x 1.8 m, so it's a bit silly to take a bunch of those on the roof? ;)
 
Lift up one side first, then just slide it on, you can carry that truss yourself without being a hulk. If there are two people, there is no problem getting them up, it can be done alone as well, but the risk of injury increases.
 
Oh, are they that easy? Then maybe I should order after all.. :)
I'm in the process of sending out quote requests to different ones now. What do you think one can expect as a ballpark price for 8 fackverksstolar?
 
A truss like that should weigh in the range of 50-80kg, so they're not too heavy to handle for two people, and maybe you shouldn't drive with 10 at once on the roof, but 4-5 is no problem if you use common sense. I remember when I had 850kg of paint in the homemade roof box on the Land Cruiser once, and maybe it was a bit wobbly in the roundabouts, but no problems otherwise ;)
 
Might not belong here but the maximum load on the roof is usually around 100kg and the maximum load for the entire car is usually around 4-500 kg... so driving with 4-5 tkstolar at 50-80 kg... nah... the load weight isn't counted in driving with common sense....::p
 
Well, the load weight is adapted for highway speed... you can probably quadruple it at low speed...
 
Mikael_L
Mäster said:
Lift one side first, then just push, you can carry the truss by yourself without being a buff guy. If there are two people, it's not a problem to get them up, it can be done alone too, but the risk of injury increases..
Hehe, I don't really think so... but almost...

The ones with a 4-meter span I made for the garage I could barely carry around by myself (but then I'm not a buff guy, more of an asparagus ;)). If they had been made by a truss manufacturer, they would have classified wood and therefore slimmer dimensions and thus lighter. Just a guess 20-25% lighter.

When the trusses were to be put up, we were two asparagus guys, then it went absolutely easily, we could easily have handled 5-6 and maybe 7 meter trusses, it felt like.
 
chrille112 said:
Oh really, are they that easy? Then maybe I should order after all.. :)
I'm in the process of sending in a request for quotes to different ones now. What do you think you can expect as a ballpark figure for 8 truss chairs?
8000-10000:- ?
 
Okay, thanks everyone for the answers! Now I just have to hope that I get a response from one of the quotes... :)
 
Tossegubbe said:
Well, the payload is adjusted for highway speed... you can surely quadruple it at low speed...
Hehe... Try convincing Harry Haffa of that theory....:D
 
Tossegubbe said:
But I don't see the problem with buying ready-made ones? If you can get the materials to build from, you can well bring a finished one there? They're not bigger than you can put them on the roof rack if needed..
Either you have never seen/handled 7m roof trusses or you mean not an enormously big car.
 
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