armor units such as dolosse or that other variables not considered by the equa- 

 tion are important; e.g., wave period is thought to be a factor but is not con- 

 sidered in Hudson's equation. While this may or may not be correct, any other 

 armor stability equation could have been used in the analysis without signifi- 

 cantly changing the conclusions presented in this report. Other stability 

 equations might change the details of the results but would not change the 

 following observations regarding relative economics of "overdesigning" armor 

 layers. 



Figure 2 presents the end result of the economic analysis for two sets of 

 calculations for dolosse armor (Kp =13.6 and Kq = 25.0). The set of inter- 

 secting curves to the right in the figure is for calculations with Kp = 13.6; 

 the curves to the left are for Kq = 25.0. The figure presents the total first 



col 8 = 3.0 



e 2 (interpolated) 



Wr:l70 



Wr:l60 lb/ft? 



W: 3.7 tons 

 W: 2.8 tons H ! 



4 6 8 10 



Weight of Dolosse(ton) 



14 



Figure 2. Total cost of 100 feet of structure as a function 

 of structure slope, concrete unit weight, and 

 dolosse weight for K^ = 13.6 and K^ = 25.0. 



10 



