sleeper retaining wall

[johnlewis]

looking to build a 15m sleeper retaining wall about 1m high i will be using 200mm x 100mm 2.4m posts , and joining together 5 to make the 1m up with 1 post every 2.4m sunk in the ground to support them and then bolted together with timberlock screws .

is postcrete strong enough to support the vertical posts ? or does it need actual concrete ?

 

[r896neo]

1 post every 2.4m is far too little support.

The other problem is fixing them. If you use 2.4 centres and you stagger the joints you would end up in a situation where a joint falls in no mans land halfway between posts.

Set them at 1.2m intervals assuming your sleepers are 2.4's.

I would use concrete.

 

[johnlewis]

cheers

this part of the garden is actually stepped, the main bulk of earth is being held back by a 1m concrete block and brick wall 9inch , i am looking to soften the slope up to the grassed area by putting some tiered flower beds in , so the first level would be 60cm and the next 40cm

do you think something like this would be sufficient ?

http://www.ebay.co.uk/itm/Machined-...DefaultDomain_3&var=&hash=item3f229934c9#shId

 

[excited]

I staggered mine so they where like large bricks, widest side down and bolted at 600mm Centers. The bottom ones a drilled through in 3 places and used 12mm rebar through the holes 1meter into the ground, I levelled the bottom ones by sitting them on a very dry concrete mix.

At the back i filled the gap with some gravel to allow water to pass through.


Hope this helps

 

[johnlewis]

just updating with pics

43 sleepers later ,

now another 20 sleepers and 8 tonnes of rock to fill some gabions now at the back of the garden

anyone know a cheap supplier of gabion rock in the surrey area ?

Untitled

• johnlewis
• 29 Oct 2013
• 1

Untitled

• johnlewis
• 29 Oct 2013
• 1

Untitled

• johnlewis
• 29 Oct 2013
• 1

 

[noseall]

Wood rots use bricks.

The modern so-called sleepers are especially vulnerable as they are not impregnated like proper railway sleepers.

We are seeing 75-90% through rot on sleepers less than 10yrs old.

 

[johnlewis]

Wood rots use bricks.

The modern so-called sleepers are especially vulnerable as they are not impregnated like proper railway sleepers.

We are seeing 75-90% through rot on sleepers less than 10yrs old.

already there too late the horizontal ones will not rot dpm sealed behind them
verticals might need to be replaced though eventually , no big deal stagger the replacements in turn and it should be alright.

the main structure is a 9" thick brick and concrete block wall that has just been built

i might use concrete repair spurs hidden at the back of the next sleeper wall