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Retaining walls - whats the most cost effective method?

royq
Established Contributor

Retaining walls - whats the most cost effective method?

Hey guys,

 

Over the last few months I've cut down and removed 30 palms from a small section of my front yard (I now have ocean views!!!), and now I need to build a retaining wall on the boundary so that I can make that part of my yard useable. I've built walls in the past from treated pine sleepers, concrete sleepers with gal posts, sandstone quarry logs and a couple of other methods. However I'm looking for a super cheap method, I've heard of stacking and filling old tyres, has anyone tried this? It'll be about 20m long and 1.5m high, my neighbour will be planting a hedge in front of it so it doesn't matter what it looks like.

 

Any ideas?

 

IMG_20170819_155803.jpg

 

P.S don't stress about the palms, I have another 90 spread over my property

 

Thanks, Roy


never too old to try, always young enough to do it again
Community Manager Jason
Community Manager

Re: Retaining walls - whats the most cost effective method?

@royq

 

I understand you're thinking about something "super-cheap", but you still might be interested in these previous retaining wall discussions on Workshop:

 

 

 

Good luck with the project. I hope Workshop members will be able to assist.

 

Jason

 

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royq
Established Contributor

Re: Retaining walls - whats the most cost effective method?

Thanks @Jason

 

I had a look through the gabion discussion, this might be the way to go. I have a few contacts for sandstone ballast that are pretty cheap. I'll do some estimating and see what I can get the square metre rate down to. The big saving with these is that there's no piers in the footing like there is with timber walls.

 

Coincidentally I found a page about tyre retaining walls. They won't do for the height of wall I'm working with here.

http://www.gabion1.com.au/gabion-pic-info-39/

 

Thanks again, Roy


never too old to try, always young enough to do it again
BIM_Engineer
Valued Contributor

Re: Retaining walls - whats the most cost effective method?

@royqtry post and rail
It will also require Certified Engineering Details submitted to your local Council

royq
Established Contributor

Re: Retaining walls - whats the most cost effective method?

Thanks @BIM_Engineer,

I've started costing things up and I am finding that the pine sleeper post and rail wall will be marginally cheaper than gabions. Still not sure though, gabions seem a lot easier.

I was wondering about the engineering and approval side of things, how high can you go with a wall without needing council approval? In the past I have only ever replaced existing walls so the engineering had to be done but we didn't worry about council approval.

Cheers, Roy


never too old to try, always young enough to do it again
BIM_Engineer
Valued Contributor

Re: Retaining walls - whats the most cost effective method?

@royqI have all the engineering & construction data used in costings, unfortunately it had to be Blurred..for Professional & Other reasons. Regarding Gabion Walls Labour & Placment on your Sloping block would be very expensive even tho the cage and fill may be cheap.. do the sum$
But if you need some additional info (other than photos) PM me or send me an email appsb4Ubuild
Some Councils want an engineers certification for Boundary retaining walls higher than 1m? so please check with your councils website Under
Building Approvals->checklists-> retaining walls
Cheers


royq
Established Contributor

Re: Retaining walls - whats the most cost effective method?

Thanks @BIM_Engineer, You're spot on, I just looked it up. I might be able to put a 600mm wall on the boundary and then a 1m one set back from the boundary to get around it. What do you think?

Capture.JPG

I'll be doing all the filling myself to keep $ to a minimum so it'll just be materials that I have to take into account.

 

Cheers, Roy


never too old to try, always young enough to do it again
BIM_Engineer
Valued Contributor

Re: Retaining walls - whats the most cost effective method?

@royq
Terracing logic ...Sounds good to me
You will need to set back 1.2 (min.)  x the walls height for each terrace. hth

royq
Established Contributor

Re: Retaining walls - whats the most cost effective method?

@BIM_Engineer thanks for your help! I won't be building the wall for a few months but I'll keep you updated.

 

Cheers, Roy


never too old to try, always young enough to do it again

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