tolerable differential settlement is exceeded, the panels tend to lean against or p apart from each other,
causing the concrete to spall in stress areas. The nuts on the connecting bolts tend to unwind under w
agitation, and should be inhibited by the use of double nuts destruction of the exposed threads behind the
nuts. Otherwise, end units ma fall away if the nuts unwind completely.
The Z-Wall performs best at a site with a firm bottom. The six-foot panel height limits its use to
relatively shallow water.
Surgebreaker
Wave Height Range: Above five feet.
A Surgebreaker is a modular device constructed with patented 3,700-pound, precast, reinforced
concrete modules (Figure 69) with vent holes to release wave pressure buildup. The triangular modules
are 4 feet high and 7 feet wide. They are designed to placed side-by-side on the existing bottom with the
flatter slope face of the device toward the waves (Figure 70).
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