Free standing or retaining walls should not exceed the 2:1 ratio
Gabion retaining walls with flat ground behind or slopes of less than 5deg. should not exceed the 2:1 ratio
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Non retaining walls less than the 2:1 ratio, will need internal supports to prevent collapse
Retaining walls with additional loads on top of them, e.g. driveways, banks, buildings, will require extra thickness, and possibly an engineer’s design.
Gabion support posts must extend to at least 1.5 x Depth from the top of the gabion basket
Gabion support posts need to strong enough that they do not snap or bend under the load of the gabion wall. Gabion cages are tied, to the support posts with bracewire. See example below
Gabion support posts spacing should be no greater than 3ft apart.
Supported gabion wall foundations
Hollow steel posts need to be capped to prevent water entry
Supports can be internal or external
An engineer’s design will take precedence, over these guidelines.
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Example of bracewire wrapped around support post
Example of support post in non-retaining wall
Support posts are not recommended for retaining walls unless engineer designed
