# Quick Answer: How To Design Retaining Wall?

## How do you calculate retaining wall?

Multiply the length of the wall (in feet) by the height of wall (also in feet) to get the square footage of the outside face of the wall. Then, multiply 1.12. This allows for having 12% of the wall’s height under the surface of the ground to give the wall more stability.

## What is the easiest retaining wall to build?

For the average do-it-yourselfer, building a retaining wall is easiest when using masonry blocks that will be stacked no taller than three feet, with no mortar binding the stones or concrete members. (For a curved wall, mark instead with a garden hose or spray paint.)

## How do I make a RCC retaining wall?

Retaining Wall design | RCC Structures

1. The stem and base are the main parts of a cantilever type of retaining wall.
2. Generally the height of the wall known and approximate dimensions are required to be assumed.
3. The length of the base is between 0.4 to 0.7 times the height of the wall.
4. A length of one metre of the wall is considered for design.
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## How deep should the footing be for a retaining wall?

Concrete retaining wall footing size

The depth to the bottom of the base slab should be kept at a minimum of two feet. However, it should always be below the seasonal frost line, and that often is much deeper in northern climates.

## How much does a 4 foot retaining wall cost?

Retaining Wall Cost per Square Foot

Size Average cost
25 x 3-feet (75 sq.ft.) \$3,750
25 x 4feet (100 sq.ft.) \$5,000
40 x 4feet (160 sq.ft.) \$8,000
60 x 4feet (240 sq.ft.) \$12,000

## Does a 3 foot retaining wall need drainage?

Drainage. Third, since most retaining walls are impervious, which means water cannot pass through the wall itself, efficient drainage is crucial. When drainage goes unaddressed hydrostatic pressure will build up behind the wall and cause damage such as bulging or cracking.

## What is the cheapest retaining wall to build?

What is the cheapest retaining wall material?

• Treated pine and is the least expensive material.
• Hardwood is more expensive than treated pine.
• Railway sleepers are another – slightly more expensive – option and are built to withstand ground and water contact.
• Concrete sleepers are more expensive.

## What type of retaining wall is best?

Timber and inter-locking-concrete-block walls are great DIY retaining wall ideas. Mortared masonry and poured concrete ones are usually best left to a mason.

## What can I use instead of a retaining wall?

Reinforced soil slopes are the most cost-effective retaining wall alternatives. Often times you are using the soil that you already have on hand and do not need to bring in any additional.

• Reinforced Soil Slopes.
• Natural Stone Walls.
• Wooden Timbers.
• Gabion Walls.
• Soil Bioengineered Walls.
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## What is RCC retaining wall?

Types of reinforced concrete retaining walls are cantilever retaining walls and counterfort retaining walls. Retaining wall are generally used to retain earth or other material to maintain unequal levels on two faces. The material on the back face is called backfill.

## What are the types of retaining wall?

The Four Basic Types of Retaining Walls

• Gravity Retaining Wall. The most basic of retaining walls, the gravity retaining wall uses sheer weight and mass to hold the soil at bay.
• Cantilevered Retaining Wall.
• Sheet Piling Retaining Wall.
• Anchored Retaining Wall.

## What is a gravity retaining wall?

Gravity Retaining Walls

A retaining wall that relies solely on it’s own weight to stand up is called a gravity wall. Allan Block combines the basic engineering principles of setback, leverage and total unit mass with simple mechanics to make highly stable gravity walls.

## Does a 2 foot retaining wall need drainage?

Although there are exceptions, most retaining walls require gravel backfill, soil compaction, pipe or toe drains, and weep holes. Together, these four features will provide adequate drainage for most designs. Only a few types of walls will not require all of them.

## Do I need rebar in a retaining wall?

A retaining wall must provide a way to release the water that builds up in the slope behind it. Retaining walls must be stronger than freestanding walls. Insert rebar in the footing when you pour it; this should be done at every three blocks or at intervals specified by your local codes.

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

Most municipalities require a building permit and a design from a Licensed Engineer if your wall is taller than 4 feet high (measured from the bottom of the first block to the top of the last block). Will your retaining wall be terraced?