This section is from the book "Bepler's Handy Manual of Knowledge And Useful Infomation", by David Bepler. Also available from Amazon: Bepler's Handy Manual of Knowledge and Useful Information.
Ice two inches thick will bear men or infantry to walk on.
Ice four inches thick will bear cavalry or light guns.
Ice six inches thick will bear teams with moderate load or heavy field guns.
Ice eight inches thick will bear teams with very heavy loads, and sledges.
Ice ten inches thick will sustain a pressure of 1,000 pounds per square foot.
A cubic foot of ice weighs 57.5 pounds.