1 inch rock

Used for many of the same drainage and concrete functions as the smaller diameter ¾” rock, but where a larger and coarser rock is specified or desired.

Sieve Results

ASTM C136 / AASHTO T27
Sieve Size% Passing*
100 mm (4")100
37.5 mm (1-1/2")100
25.0 mm (1")100
19.0 mm (3/4")6
12.5 mm (1/2")3
9.5 mm (3/8")2
4.75 mm (No.4")2
2.36 mm (No. 8)1
0.075 mm (No.200)1