
Whenever walls are constructed in a terraced arrangement the
designer should consider the overall global stability of the structure.
It is common to have the design grid lengths for the bottom
terrace equal to at least 60% of the total terraced structure height.
Subsequent terraces above would use similar rationale to
determine their minimum grid lengths.
Greater attention to compaction should be placed on the
foundation soils below the upper terraces and in transition areas where the
wall splits from one wall into two. If
the soils are not properly compacted in these areas, settlement can occur over
time that could cause aesthetic concerns. (ref. BP, Chapter 10.1)

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