We all know it: Manual lifting strains the back, shoulders, and legs. And improper lifting causes injuries that can be serious and lasting.But how can you tell if a lift is safe or unsafe? Is it OK for a technician to hoist a drain machine out of and back into a truck at job sites? Or should you really outfit the truck with a ramp or some type of hoist?Well, you don’t have to guess. There’s a way to determine, mathematically, whether a given lift is likely to cause harm. It’s called the NIOSH Lifting Equation. You can find information
