Are larger units required for the roundhead of a breakwater?
In common with other single layer armor units the roundhead may normally be expected to be constructed of armour units with a mass that is about 25% heavier than the units at the trunk. The slope angle of the roundhead may be kept equal to the slope angle of the trunk, which is a more economical and technically sound approach than the option of using the same sized armor on the trunk but laid on a flatter slope.
