Plan 



Bottom 



Plan 



Elevation 



QUADRIPOD 



Elevation 



TETRAPOD 



Plan 



Bottom 



Plan 



Bottom 



Elevation 



DOLOS 



(DOLOSSE, plural) 



or 



Elevation 



TRIBAR 



Figure 32. Concrete armor units (U.S. Army, Corps of 

 Engineers, CERC, 1977). 



159 



