Of leveling sand and half the height of the first course of blocks.
2 foot high concrete retaining wall.
How to build a concrete wall figure a.
Poured concrete costs about 30 40 or more a square foot usually with a minimum charge for small jobs or about 1 500 2 000 for a wall 30 inches high and 20 feet long.
Cross section of a retaining wall a cinder block retaining wall is only as straight and solid as the base it s built on.
One key aspect of retaining wall construction is preparing a solid footing or foundation.
Cover the gravel between your retaining wall and landscape with topsoil or sod so your garden will grow against your wall achieving a natural look.
An average brick retaining wall that is 30 feet long and 4 feet high without any built in steps or extra reinforcements is typically around 4 220 the average homeowner will pay 35 per square foot and spend between 2 450 and 6 650 to build a retaining wall.
Using construction adhesive secure your block caps and create the top layer of your retaining wall.
46 5 face ft.
Concrete retaining wall footing size the depth to the bottom of the base slab should be kept at a minimum of two feet.
The block caps should overhang the retaining blocks by 1 to 1 1 2 inches.
Timber walls 4 feet or higher should be tied to the hillside with deadmen anchors 6 foot long t shaped tiebacks buried in the hillside attached to the wall every 8 feet extending 6 feet back to a 2 foot wide t bar.
Of compacted base 1 in.
In general the top of the stem of any cast concrete retaining wall should not be less than 12 inches for the proper placement of concrete.
Pavestone rockwall small 4 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.
Tall wall excavate a trench deep enough to accommodate 4 to 6 in.
All retaining walls should lean into the hill 1 inch for every 12 inches of height.
Soil is heavy especially when soaking wet from a recent rainstorm so a basic retaining wall four feet tall and 15 feet long potentially has to support up to 20 tons of soil pressure.
Pecan concrete retaining wall block 144 pcs.