Table 7-8. Suggested Kp Values for use in determining armor unit weight . 



CAUTION : Those Kr, values shown in itatiae are unsupported by test results and are only provided for 

 preliminary design purposes. 



2 



Applicable to slopes ranging from 1 on 1,5 to 1 on 5. 



3 



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



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

 and only under special conditions for structures subject to nonbreaking waves. When it is used, the stone 

 should be carefully placed. 



Until more information is available on the variation of K^ value with slope, the use of Kp 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 Kr,-slope 

 dependence. 



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



Parallelepiped-shaped stone: long slab-like stone with the long dimension about 3 times the shortest dimension 

 (Markle and Davidson, 1979). 



D 



Refers to no-damage criteria (<5 percent displacement, rocking, etc.); if no rocking (<2 percent) is desired, 

 reduce K^ 50 percent ( Zwambom and Van Niekerk, 1982). 



9 



Stability of dolosse on slopes steeper than I on 2 should be substantiated by site-specific model tests. 



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