OSHA, ANSI and CSA Guard-Opening Scales

OSHA Guard-Opening Scale in UseBarrier guards are usually the first point-of-operation safeguarding method considered for machines. When a guard is used as the primary safeguarding method, it must be designed, constructed, adjusted, and maintained so that someone cannot reach under, over, around, or through the guard.

An OSHA or ANSI guard-opening scale is a valuable tool to use during the design, installation, and inspection of guards to make sure they comply with OSHA, ANSI, and CSA safety standards.

OSHA Guard-Opening Scale—Part No. KSC-097

OSHA Guard Opening Scale

  • Precision-engraved acrylic copolymer material
  • Compact—folds to one-third its size to fit in a pocket
  • Engraved markings will not rub or scratch off
  • Based on Table O-10 of CFR 1910.217
  • English units on one side and metric units on the other side

ANSI Guard-Opening Scale—Part No. KSC-098

ANSI Guard Opening Scale

  • Precision-engraved acrylic copolymer material
  • Compact—folds to one-third its size to fit in a pocket
  • Engraved markings will not rub or scratch off
  • Use it to check openings for compliance with ANSI B11 safety standards and Canadian safety standards
  • English units on one side and metric units on the other side
  • Based on A Review of Machine-Guarding Recommendations by Donald R. Vaillancourt and Stover H. Snook of The Liberty Mutual Research Center for Safety and Health

Order guard-opening scales from Rockford Systems, LLC