[1983 Code § 163-27]
The sidewalks are to be regulated and graded from the curbline
to the property line, to the proper grade. Such portions as are abovegrade
shall be excavated, and such as are below the grade shall be filled
in. Where the fill is greater than one foot, it must be filled in
layers and thoroughly tamped and compacted. All grading for the walks
must be of sufficient depth to allow for a six-inch foundation and
a two-inch sand cushion to be placed under the flagstone.
[1983 Code § 163-28]
Upon the subgrade shall be placed a four-inch layer of coarse
gravel, free from loam or earth, or clean steam-boiler cinders, which
shall be well compacted to a uniform grade. Upon this, a layer of
clean, coarse sand two inches in depth shall be placed for a bed for
the flagstone.