Lockout/Tagout Calculator

Not necessarily -- that's the individual-lockout model this calculator uses by default, and it is a valid, conservative approach, but 1910.147(f)(3)'s group lockout provision lets each energy source carry a single lock or hasp while every authorized worker adds one personal lock to a shared group lockout device or box instead. A crew of five working on ten energy sources needs roughly fifteen locks under group lockout, not fifty -- check which model your documented procedure actually specifies.

No -- 1910.147 sets performance requirements for the energy control procedure itself and does not publish per-step time figures. These are illustrative planning estimates meant to produce a rough procedure-duration number for scheduling purposes; your actual equipment's isolation and verification times can differ substantially based on the number and type of energy sources, valve accessibility, and crew experience.

Additional Locks Needed only reports a shortfall against Available Lockout Devices -- once your on-hand inventory meets or exceeds Locks Required, the calculator stops there instead of counting the surplus as a negative number, because having extra locks on the shelf isn't a deficit worth reporting. Raising Available Lockout Devices can only shrink this number or leave it at zero; it can never make Locks Required itself go up or down.

Only by coincidence -- it applies a flat $45/hour example rate to Total Procedure Time and Authorized Workers, not any wage data specific to your site or trade. Treat Labor Cost per Procedure as a template for building your own estimate, and substitute your real loaded labor rate (which varies widely by trade, region, and whether the work is contracted) before using it for budgeting.