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.
4 foot concrete retaining wall design.
Of leveling sand and half the height of the first course of blocks.
Wood shall not be employed in the construction of retaining walls.
Design procedure overview 3.
Concrete retaining wall footing size the depth to the bottom of the base slab should be kept at a minimum of two feet.
All retaining walls should lean into the hill 1 inch for every 12 inches of height.
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Follow the block manufacturer s instructions for wall height limits.
Tall wall excavate a trench deep enough to accommodate 4 to 6 in.
How to build a retaining wall.
There are many things that need to go into building a retaining wall before the first shovel of dirt is ever moved.
Fortunately working with retaining wall blocks makes it incredibly easy to achieve.
Soil bearing and stability 8.
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.
Special inspection is required as specified in the building code section 1704 5 except for those retaining walls cantilever and restrained with a stem wall height less than 6 feet 10 inches measured from top of footing to top of stem wall where the allowable design.
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.
Forces on retaining walls 6.
Of compacted base 1 in.
Soil mechanics simplified 4.
By using the information we have on building retaining walls you will get everything you need to plan design and build the perfect retaining wall project.
Design and build your retaining wall to slope at a minimum rate of one inch for every one foot of rise height.
A cinder block retaining wall is only as straight and solid as the base it s built on.
Retaining wall design 10 editionth a design guide for earth retaining structures contents at a glance.
Building codes and retaining walls 5.
Avoid having downspouts pointed at the retaining wall and if it s against the house keep soil and mulch well below the siding.
Particularly retaining walls can assist you on keeping the soil on one side of the structure enabling a lower floor level on the other side of the wall.