| When pouring a
bowl or other large obstacle, the walls are poured first and
the floor poured later. One big danger is that after the
concrete has been placed and finished, someone will step on
the tied rebar of the floor section before the concrete for
the walls has time to set up properly. At best this will call
for refinishing of the concrete surface. At worst it can
cause a series of cracks that looks similar to a waffle.
Neither of these events is desirable.
To avoid this damage you
may want to consider covering the rebar with a false floor
that protects it when walked upon. To make the floor, break
8-inch concrete blocks (half blocks) into two pieces along the
sides with a mason’s chisel and a hand hammer. The split
blocks will cover the rebar without touching. Upon these
blocks place plywood or other planking.

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