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Safe Ice Thickness
Ice Permissible Load
3 inches ..............Single person on foot
4 inches ............. Group in single file
71⁄2 inches ......... Passenger car (2-ton gross)
8 inches .............. Light truck (21⁄2-ton gross)
10 inches ....... Medium truck (31⁄2-ton gross)
12 inches ............ Heavy truck (8-ton gross)
15 inches ............ 10 tons
20 inches ............ 25 tons
30 inches ............ 70 tons
36 inches ............ 110 tons
