Table 2. Weight percentages by class 

 of two typical beach sands. 



Mesh 



Mesh 



Phi 



Weight percent 



No.i 



size 



value 



sample 





(mm) 





1 



2 



5 



4.00 



-2.0 



0.0 



0.0 



7 



2.83 



-1.5 



1.0 



1.0 



10 



2.00 



-1.0 



2.0 



2.0 



14 



1.41 



-0.5 



11.0 



3.0 



18 



1.00 



0.0 



34.0 



6.0 



25 



0.71 



0.5 



37.0 



14.0 



35 



0.50 



1.0 



13.0 



26.0 



45 



0.35 



1.5 



1.0 



24.0 



60 



0.25 



2.0 



1.0 



15.0 



80 



0.18 



2.5 



0.0 



5.0 



120 



0.13 



3.0 







3.0 



170 



0.09 



3.5 







1.0 



230 



0.06 



4.0 



--- 



0.0 



^Mesh 

 bers fo 

 the mil 



numbers are ASTM- as signed num- 

 r sieves with openings equal to 

 limeter mesh size shown. 



Table 3. Phi sizes and millimeter equivalents of the 

 phi mean for the grain-size distribution 

 data shown in Table 2 (presented in manner 

 suggested by McManus (1963) and as discussed 

 in Section III . 3) . 



Sample 



(i)16 



(1)84 



Mean 



S* 



(No.) 



(|) (mm) 



1 

 2 



-0.48<J) 

 0.14(J) 



0.48(t) 

 1.76d) 



O.OOtf 1.00 

 0.95(j) 0.52 



0.48 phi units 

 0.81 phi units 



17 



