| TEMP FAHRENHEIT |
LBS. OF ICE MELTED
BY 1 LB OF SALT |
EFFECTIVENESS |
|
30 Degrees |
46.3# |
100% |
|
25 Degrees |
14.4# |
31% |
|
20 Degrees |
8.6# |
18.5% |
|
15 Degrees |
6.3# |
13.6% |
|
10 Degrees |
4.9# |
10.5% |
|
5 Degrees |
4.1# |
8.8% |
|
0 Degrees |
3.7# |
8.0% |
|
-6 Degrees |
3.2# |
6.9% |
NOTE THE LARGE DROP OF EFFECTIVENESS FROM 30 DEGREES TO 25 DEGREES (100% DOWN TO 31%). THIS IS ONE REASON WHY GRIT IS SOMETIMES ADDED TO SALT AS THE TEMPERATURE DROPS. GRIT THEN PROVIDES SOME TRACTION. |