> the racks we use for C14 ... weigh more than one ton on less than one square foot > Each C14 rack weights more than one ton on less than one square meter.

> the racks we use for C14 ... weigh more than one ton on less than one square foot > Each C14 rack weights more than one ton on less than one square meter. I think the 1st of these was "translated" from metric; the latter sounds much more reasonable.