Hi Paddy

You have either put in an extra 0 or left one out of your example.
this may confuse some answers.
Weight x distance = distance by Weight always
Of course Johnr_J is correct but he may be just over playing it a bit.
OSHA is not in Australia.
His old Inch-pound rating is still fairly accurate
Give me your email and I can send you these calculations without causing a riot.