Design
Certification starts with a design that can be certified: an engineer's drawings and calculations for the specific wall on the specific ground. A wall built from a generic detail cannot be certified after the fact with confidence.
Inspection during construction
Hold points are the stages that cannot be checked once covered: the base, the first course, the drainage, each layer of geogrid, the steel in a reinforced wall. They are inspected and recorded as the wall rises. On head-contractor work this runs under an inspection and test plan agreed before the wall starts.
What you receive
The engineer's certificate, the as-built drawings where they differ from design, the inspection records, compaction test results where required, and the material certificates for blocks, geogrid, pipe and rock. That package satisfies a certifier, a council and a head contractor's quality system.
