Density Range
Low High Class
0.01 0.9 500
1 1.9 400
2 2.9 300
3 3.9 250
4 4.9 200
5 5.9 175
6 6.9 150
7 7.9 125
8 8.9 110
9 10.4 100
10.5 12 92.5
12 13.4 85
13.5 14.9 77.5
15 22.4 70
22.5 29.9 65
30 34.9 60
35 49.9 55
50 300 50