Now the ideas are starting to make more sense. I'm not completely sold on the idea yet. It will probably look better as a sketch on paper than in reality... But this is eons better than your truss beam!O olahall said:Here's a quick sketch...
[image]
Bounce a few more ideas around and you'll probably be set. Right now, it's the beam marked below that you'll need to dimension correctly so everything doesn't bend downwards under its own weight:
Have measured a bit more carefully now, though quite roughly...
Longest support beam: 450cm
Shortest support beam: 260cm
Longest rule: 490cm
If I want a slope of 1/10, I need to go up to 250 at the highest point if I start from 2 meters as the lowest point in the innermost corner.
This means the longest support beam must be at 230cm and the shortest at 215cm.
But maybe a smaller slope will suffice???
In that case, I could manage with a support beam of dimension 45x220 on the longest one.
That would give a slope just under 0.7/1.
Input on that??
:/
Longest support beam: 450cm
Shortest support beam: 260cm
Longest rule: 490cm
If I want a slope of 1/10, I need to go up to 250 at the highest point if I start from 2 meters as the lowest point in the innermost corner.
This means the longest support beam must be at 230cm and the shortest at 215cm.
But maybe a smaller slope will suffice???
In that case, I could manage with a support beam of dimension 45x220 on the longest one.
That would give a slope just under 0.7/1.
Input on that??
:/
However, I'm starting to wonder about the load on the posts now...
What dimensions do they need to be to support this construction???
The load is perhaps mostly downward on them, though. The cross beams do stabilize.
But still worth inspecting?
What dimensions do they need to be to support this construction???
The load is perhaps mostly downward on them, though. The cross beams do stabilize.
But still worth inspecting?
You could also shift the posts to the outer bearing line so they become higher instead of installing a 220 beam.O olahall said:Yes!
I'm measuring and thinking here!
Right now I'm considering having the longest beam be 45x220 and the shortest 45x70 to get the slope.
You should probably have 90x90 posts on them as they will take most of the load.
The longest beam can be secured by a slightly over half-meter post on the outer bearing line and a cable stretched between the back and front edge of the beam.
It could look pretty cool; you can even tighten the cable so that the beam bends slightly upwards.
A somewhat crazy idea, but it will at least ensure that the beam doesn't bend downwards.
It's quite a big project to replace the posts since the ones I have are currently in anchors, which I would have to change to larger ones.GoC said:
I'm not quite sure what you mean with the wire. I want to place a covering on the roof, from above. Wouldn't the post and wire be in the way then?
The freely hanging part is only 170cm, so it doesn't seem like it will sag too much.
I don't really know how much that is; as I said, I don't know how to calculate it.
:/
If the studs are on ground anchors, you will probably still need to switch to plinths. Ground anchors can't handle the load of the roof and will likely sink due to the increased load. But it also depends on the type of ground you have driven them into. So I think you should probably expect to do the work of digging down plinths for the posts for the outer main beam.