I am planning to build a windbreak according to the model/illustrations below:
Does anyone with some experience know if it's sufficient for me to use 3 ground anchors per straight section (each about 2-3 meters) for 45x45 posts that are also screwed into the deck at the bottom? I plan to mount 28x45 Staketribba overlapping on each side of the posts (according to this guide).
I am never attaching to the facade and am therefore a bit afraid it will be wobbly, unstable, and over time crooked, but I hope it might be enough if I round the two angles/corners of the deck and attach the three sections to each other. Thoughts?
45x45 is weak, it will never be sturdy. The corners will stabilize everything, but the post at the entrances is the critical part. How high above the ground is the deck, with a ground anchor + proper fastening to the deck as high as possible, it should be reasonable if you get the upper fastening a bit higher.
Ground anchors will become wobbly even if the posts are screwed into the deck. Proper 80 cm piers are the only thing that will make it somewhat stable. And 70x70 minimum. The corners stabilize it to prevent it from becoming crooked over time, but it will still be wobbly at the ends.
Ok, thanks for the response. Now I'm instead considering larger posts, maybe 70 as suggested here, and anchor them better in the ground. I'm thinking of a manually mountable screw pile, like these. That should work just as well as plinths (sounds like much less work, and less damaged surface), but do you have any suggestions on the minimum length to make it reasonably stable (available in lengths ranging from 0.65 to 3.2m)?
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