Table 37. Construction limitations: quarrystone 



revetment . l 





CATEGORY 



A 



B 



C 



Parameter 



Severe 



Dynamic 



Loading 



Dynamic 

 and Static 

 Loading 



Stringent 

 Placement and 

 Drainage 



Steepest Slope 



IV on 2H 



IV on 2.5H 



IV on 3H 



Min. Gravel thickness 

 above filter 



None 



None 



20 cm 



Stone adjacent to 

 geotextile : 









Max. stone weight 3 

 Max. drop height 



1.1 kN 

 1 m 



0.78 kN 

 1 m 



Gravel i 

 1.5 m 



Max. stone weight 

 Riprap weight range 4 

 Max. drop height 



1.8 kN 

 0.89 - 3.3 kN 

 0.61 m 



1.3 kN 



0.22 - 2.2 kN 



0.61 m 



NA 2 



Max. stone weight 

 Max. drop height 



1.8 - 8.9 kN 

 placed 



1.3 - 8.9 kN 

 placed 



NA 



Subsequent Stone Layer: 









Max. stone weight 

 Max. drop height 



NA 



NA 



0.67 kN 

 1.2 m 



Max. stone weight 

 Max. drop height 



NA 

 NA 



NA 

 NA 



1.3 kN 

 1 m 



Max. stone weight 

 Max. drop height 



44 kN 

 3 m 



44 kN 

 2.5 



4.4 kN 

 placed 



Max. stone weight 

 Max. drop height 



> 44 kN 

 placed 



> 44 kN 

 placed 



> 4.4 kn 

 placed 



NOTE : a. Stronger principal direction (SPD) and seams of the geotextile 

 should be perpendicular to the shoreline, 

 b. There is no limit to the number of underlayers between the armor 

 and the geotextile. 



1 This table may also be used for sand core breakwaters (a jetty, 

 groin or breakwater in which the core material consists of sand 

 rather than stone) . 



2 Not applicable 



3 Weight of quarrystone armor units of nearly uniform size. 



4 Weight limits of riprap, quarrystone well graded within 

 wide size limits. f 



291 



