First you will need to excavate a trench to a depth below the frost line in the UK that about 2ft 6in 750mm below ground level. For a one brick thick wall That 211 to 220mmm wide the trench will need to be 450mm wide.
A three foot high retaining wall will, then, have posts recessed below ground three feet. This is pretty rough logic but its a place to start. On flat ground, a retaining wall need not be so deeply footed but, if you want that wall to last, its not that much more work to bury those posts nice and deep.
For a low retaining wall, the posts must go 100 mm into the ground for every 100 mm retained above ground. walls higher than 1.5 m will require a building consent. For retaining walls 1 m or higher, the New Zealand building Code may require a safety barrier at the top. in domestic
I am building a Steel and timber lagging retaining wall that is 36-40 inches high haven't figured out exact height yet . I have a ton of 4x4PT that i am going to use for the lagging. I am wondering how deep to put the H-beams into the ground? I was gonna do 24 inches, but a friend just told me for a 6ft wall he had to go 12ft deep.
Hi, I am looking at building a retaining wall 1.0m high using 2.4m wide concrete sleepers. I dont need a permit for a 1.0m high wall but how deep would I need to dig for the steel posts, I have seen elsewhere to allow 100mm height of wall, therefore I would need holes roughly 350-450mm x 1100mm, but does this depend on soil type?
Once the posts are cut, then lay them aside, and dig the holes you need on each side of the retaining wall area. They should be 18 inches deep. Set the posts inside each hole and then pour quick dry concrete into the hole to hold the posts strht. Use 2x4 braces to keep the 4x4's completely strht.
The instructions for building a retaining wall out of 4x4 treated post aim to help ambitious homeowners and do-it-yourselfers tackle this task. If you appreciate the satisfaction of creating visually appealing and utilitarian property features, start with step 1
"LEARN How Deep Should The Footing Be For A Retaining Wall? LIST OF RELATED VIDEOS OF How Deep Should The Footing Be For A Retaining Wall? IN THIS CHANNEL : How Deep Should The Footing Be For A
A retaining wall that has a slope dropping to it will need additional drainage at the base. Add gravel and a fabric-covered drainage pipe at the base. The fabric will help prevent clogging of the pipe; a key feature as you will not want to dig out the pipe later to unclog it.
I'm planning on building a 20' to 23" retaining wall using green pressure treated wood. I've seen other designs but wondered if there were any concerns with my design. My plan is to put 4x4's into the ground about 18-24" deep on 4 foot centers.
I'm building a concrete sleeper retaining wall that will retain earth just under 1.2m high. The neighbour requested to install an additional sleeper high at their cost so the overall height is 1.4 meters high therefore the depth of the hole will need to be 1.4m down.
If you wanted to use stone or brick, then you should make the wall heavier than what you are retaining, ie, soil has a density of about 1.7 metric tonnes per m3, concrete has a density of 2.4t per m3.
For a low retaining wall, the posts must go 100mm into the ground for every 100mm retained above ground. Walls higher than 1.5m may require a building consent in some regions. Make sure you check with your local council for specific regulations.
I make the posts twice the height of the wall usually, so for a two sleeper wall, I make the posts 400mm deep. Has worked OK for me, except for the one I got too close to with the bob cat, it's now about about 5mm out of plumb.
Wood retaining wall I've followed loads of threads on this issue and have a simple question. I'm building a 10m long x 1m high retaining wall - retaining makes it sound more structural than it really is as its probably more cosmetic as the banking is structurally fine without a wall but ugly. 1m up = 1m holes with 200mm x 75mm sleepers.
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