Design for Safety
Preliminary Hazard AnalysisPreliminary Hazard Analysis
The work simulator in the Ergonomics lab was used to assess to torque required to crank the handle. Using a 6 inch handle attachment, the simulator was programmed to specified forces (in pounds.) The subject, an average height female in her early twenties, who would be representative of the majority of the staff of Nazareth PTs, assessed her comfort level.
|Force, (6 inch handle)||Equivalent Torque||User Comments|
|17 lbs.||8.5 ft-lbs.||Need to use two hands to use|
|13 lbs.||6.5 ft-lbs.||Starts to get a little uncomfortable after a few revolutions|
|11 lbs.||5.5 ft-lbs.||Could do, but difficult at bottom of revolutions|
|8.5 lbs.||4.25 ft-lbs.||Could do this all day|