How do you determine the base width of a retaining wall?

How do you determine the base width of a retaining wall?

The base width should be kept in the range of 0.4 to 0.6 of the total height of the retaining wall, above the foundation. 9. The maximum length of toe should be 0.3 of the base width and minimum length can be up to 0.2 of the base width.

How far apart should my retaining wall posts be?

Mark the centre of each post hole. All posts should be 2.4m apart from centre-to-centre, except for the two end posts which should be 2.3m apart from centres (this will give a 12 metre long wall using 2.4m sleepers as rails). Each hole should be 1.1m deep and around 400mm x 400mm in width.

How deep and wide do footings need to be for a retaining wall?

A good rule of thumb regarding concrete strip-footings is that it should be dug to twice the width of your wall’s thickness. i.e. if your wall will be 225mm (9″) thick, you will want to ensure that the strip footing is at least 450mm (18″) wide.

What are the basic elements of retaining wall?

A typical retaining wall has four main components: the Stem is the vertical member holding the backfill, the Toe is the portion of the footing at the front of the wall, the Heel is the portion of the footing at the backfill side, and the Shear Key projects down under the footing.

What is the cheapest type of retaining wall?

poured concrete
The cheapest type of retaining wall is poured concrete. Prices start at $4.30 per square foot for poured concrete, $5.65 for interlocking concrete block, $6.15 for pressure-treated pine, and about $11 for stone.

Can you use sleepers as fence posts?

Railway sleepers are an ideal material for constructing simple garden steps and stairways. Use sleepers to create the riser, then fill in behind with soil, slate or gravel to create each step. Short pieces of fence post can be hammered in at the front edges of the step for added stability.

How high can a sleeper retaining wall be?

1200mm
This system works for sleeper walls up to 1200mm in height; anything higher than 1200mm needs to be designed by an engineer to take account of local ground conditions and loadings.

At what height does a retaining wall need to be engineered?

600mm
While NSW requires engineering design for any retaining wall over 600mm, the Brisbane, Ipswich and Gold Coast councils generally only require this at 1m or higher.

Do I need drainage behind retaining wall?

Every retaining wall should include drainage stone behind the wall. If there are poor draining soils such as clay behind the wall, there needs to be drainage incorporated the wall system. Clay when wet is very weak, so it is essential to provide a way for water to escape from behind the wall.

How to calculate the height of a retaining wall?

Start by deciding whether your retaining wall will have a cap row (pick “Yes” or “No” at the very top of the calculator). A cap row is the top-most row of the retaining wall, reaching higher than the wall’s actual height, which is often used for decoration. Input the height and length of the retaining wall.

How big of a trench do you need for a retaining wall?

The exact depth of the trench depends on the proposed height of the wall, but follow this rule of thumb: Dig a trench to be an eighth of the wall plus three inches.

Do you have to have carpenter level for retaining wall?

If it isn’t, subsequent rows won’t be level either, resulting in a retaining wall that’s lopsided and unattractive. Use a four-foot carpenter’s level to ensure that the gravel layer below the first course of blocks is level before you start setting the blocks. Any discrepancies here will show up higher in the wall.

What should I use for a retaining wall?

Backfill is something that cannot be forgotten when building a retaining wall. It is crucial for keeping the wall steady, as well as making sure it does not get eroded by water. It is recommended do use a granular material such as gravel, which is what we chose for the retaining wall calculator.