* n is the number of units comprising the thickness of the armor layer. 



f The use of single layer of quarrystone armor units subject to breaking waves is not recommended, 

 and only under special conditions for nonbreaking waves. When it is used, the stone should be 

 carefully placed. 



I Special placement with long axis of stone placed perpendicular to structure face. 

 § Applicable to slopes ranging from 1 on 1.5 to 1 on 5. 



II Until more information is available on the variation of K^ value writh slope, the use of K^ should 

 be limited to slopes ranging from 1 on 1.5 to 1 on 3. Some armor units tested on a structure head 

 indicate a Kj-.-slope dependence. 



% Data only available for 1 on 2 slope. 



£ Slopes steeper than 1 on 2 not recommended at the present time. 



7-170 



