Follow the block manufacturer s instructions for wall height limits.
Retaining wall base depth.
One key aspect of retaining wall construction is preparing a solid footing or foundation.
Placed behind the retaining wall to promote drainage of water away from the wall.
Dig a base trench 24 in.
The footing is usually made of poured concrete but in some situations homeowners may instead opt to simply use tamped earth or a gravel base.
600 mm wide the length of the wall the depth of the trench will be 6 in.
Divide the base depth of 5 to 7 inches depending on the height of the wall by 1 944 to determine the square yardage of the depth of the gravel base beneath the wall.
Design and build your retaining wall to slope at a minimum rate of.
Avoid having downspouts pointed at the retaining wall and if it s against the house keep soil and mulch well below the siding.
A trench filled with gravel provides a suitable foundation base for a short step back retaining wall with three five courses each layer of blocks is called a course.
Pier and pile foundations 11.
A wall that leans into the soil it retains is less likely to be pushed outward by soil pressure than a plain old vertical wall.
25 mm for each 1 ft 300 mm of wall height for the amount or buried block that is needed.
Counterfort retaining walls 12.
This prevents water from building up behind the wall.
A level base on which the wall sits.
Gabion walls 16.
The interlocking retaining wall block can be used to build walls up to 24 to 36 inches high depending on the size of the block.
Cantilevered tilt up walls 13.
Retaining wall base trench.
Soil bearing and stability 8.
Wood retaining walls 14.
Building codes and retaining walls 5.
150 mm plus an additional 1 in.
To create a solid foundation dig a trench for the first course of your interlocking retaining wall blocks to sit in and make sure the ground remains even throughout.
The success of your retaining wall depends on a level base.
This is standard for all types of landscape walls.
The depth to.
Thoroughly planned and ably performed wall construction will help to ensure the retaining wall s stability.
The leading cause of wall failure.
Designing the cantilever wall stem 9.