Lockout Hasps
A lockout hasp is a group lockout device that converts a single energy-isolation point into a multi-lock point, allowing each worker to apply their own personal lock. It is a clasp-style, interlocking device attached to an energy-isolating device, such as a disconnect switch or valve, and accepts multiple padlocks. This ensures equipment cannot be re-energized until all locks are removed, complying with OSHA 29 CFR 1910.147 and WorkSafeBC lockout requirements.
On a manufacturing shop floor, lockout hasps are used during maintenance, repairs, or changeovers on production machinery like presses, CNC machines, and conveyors. They enable multiple workers, such as mechanical and electrical trades, to secure the same isolation point simultaneously. The workflow involves shutting down equipment, applying a primary lockout device, inserting the hasp, and each worker attaching their personal padlock. This ensures that the equipment cannot be re-energized until all locks are removed, supporting multi-shift or multi-crew operations and compliance with WorkSafeBC group lockout practices.
- Using one lock for multiple workers instead of each worker applying their own lock to a hasp, violating OSHA's one-lock-per-employee principle and risking re-energization while workers are still exposed.
- Misapplication or undersizing of hasps, such as using a hasp with fewer lock holes than needed or incompatible padlock shackle sizes, leading to insecure locks and potential bypass.
- Bypassing hasps by attaching them to non-functional points or not fully securing the energy-isolating device in the safe position, allowing unexpected start-up and violating WorkSafeBC requirements.
Is the use of a lockout hasp specifically mandated by WorkSafeBC or OSHA?
Neither WorkSafeBC nor OSHA explicitly mandates lockout hasps; they require effective lockout of energy-isolating devices and, for group lockout, the ability for each authorized worker to apply a personal lock. A hasp is a recognized method to achieve this at a single isolation point, but employers may also use group lock boxes or key-securing systems.
How does a lockout hasp support WorkSafeBC's OHSR Part 10 De-energization and Lockout?
Part 10 requires energy-isolating devices to be secured in the safe position using locks under a written procedure. In multi-worker situations, a hasp allows each worker to place a personal lock on the group system, ensuring the device cannot be re-operated until all locks are removed, protecting all workers performing maintenance.
What are key design and selection criteria for lockout hasps in an industrial program?
Key criteria include material (e.g., heavy gauge steel for general use, dielectric for electrical tasks), capacity (number of padlock holes, commonly 6), compatibility with padlock shackle diameter and anchor points, and security features that prevent opening while any padlock is in place.