Table 3. Standard sieve nest. 



Opening 



Size 



Mesh 



Wentworth Classification 



(mm) 



(phi) 







2.83 



-1.5 



7 





2.00 



-1.0 



10 



Gravel 



1.41 



-0.5 



14 





1.00 



0.0 



18 



Very coarse sand 



0.71 



0.5 



25 





0.50 



1.0 



35 



Coarse sand 



0.35 



1.5 



45 





0.25 



2.0 



60 



Medium sand 



0.177 



2.5 



100 





0.125 



3.0 



120 



Fine sand 



0.088 



3.5 



170 





0.062 



4.0 



230 



Very fine sand 



16 



