Spinne
2019-06-15 19:42:42
- #1
Hello everyone,
Two years ago, we had a pergola built by an acquaintance.
The pergola is located on the terrace and has a width of 4m, a length of 4m, and a height of 2.50m.
The back part of the pergola is mounted to the house wall, making it very stable and there is no wobbling there. However, the front part is wobbly when the pergola is moved sideways or the wind is strong, and I believe that this stress is not good in the long run, especially since the attachment to the concrete was only made with U-post anchors.
As can be seen in the sketch, only the two vertical posts and the horizontal are present (filled in blue), thus no braces!
In my opinion, this is not set up well and therefore also a problem with stabilization. We especially noticed this now when we installed a hanging chair. With slight swinging parallel to the house, the pergola moves with it! When swinging toward the house, it does not move, since the attachment to the house wall is very stable. Mistakes were made, now we need a solution.
1) What do you think, is it enough to mount the two braces on the right and left (green in the sketch) to achieve sufficient stabilization? If yes, how long should the braces be? Is there a rule of thumb? For example, for the size 4mx2.5m, should the brace be mounted 50cm from the wood? What fastening material should be used, or how do I best install them? What else should be considered? Etc.
2) While googling, I came across a pergola that also had a post in the middle (drawn in red in the sketch), which would of course help. However, we would like to keep everything open, because behind it we have a beautiful hedge and the post would also obstruct the view of the garden!
So would only 1) be enough?
Do you have any other ideas?
Thanks for your help.
Best regards
Two years ago, we had a pergola built by an acquaintance.
The pergola is located on the terrace and has a width of 4m, a length of 4m, and a height of 2.50m.
The back part of the pergola is mounted to the house wall, making it very stable and there is no wobbling there. However, the front part is wobbly when the pergola is moved sideways or the wind is strong, and I believe that this stress is not good in the long run, especially since the attachment to the concrete was only made with U-post anchors.
As can be seen in the sketch, only the two vertical posts and the horizontal are present (filled in blue), thus no braces!
In my opinion, this is not set up well and therefore also a problem with stabilization. We especially noticed this now when we installed a hanging chair. With slight swinging parallel to the house, the pergola moves with it! When swinging toward the house, it does not move, since the attachment to the house wall is very stable. Mistakes were made, now we need a solution.
1) What do you think, is it enough to mount the two braces on the right and left (green in the sketch) to achieve sufficient stabilization? If yes, how long should the braces be? Is there a rule of thumb? For example, for the size 4mx2.5m, should the brace be mounted 50cm from the wood? What fastening material should be used, or how do I best install them? What else should be considered? Etc.
2) While googling, I came across a pergola that also had a post in the middle (drawn in red in the sketch), which would of course help. However, we would like to keep everything open, because behind it we have a beautiful hedge and the post would also obstruct the view of the garden!
So would only 1) be enough?
Do you have any other ideas?
Thanks for your help.
Best regards