"a" factor for use in equation (7-92) 

 M'm=d3R^-(d3+a)(1-r„)R^ 



2a 

 Hb 



1.0 

 0.9 

 0.8 

 0.7 

 0.6 

 0.5- 

 0.4 

 0.3 

 0.2 

 0.1 

 



0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 



b' 

 Hb 

 Figure 7-103. Minikin moment reduction for low wall. 



7-190 



