A haul-rope inspection is a lockout on a system where the rope itself is the stored energy. The drive is electrical and hydraulic; the tension is mechanical, in the counterweight or the tensioning carriage, and it does not care that the motor is locked.
Two terminals, sometimes kilometres apart, both able to move the system. Isolation at one end is not isolation.
ANSI B77 governs alongside 1910.147, and the inspection itself is the regulated event.
Motor and brakes isolated. The tension system is not blocked; the rope creeps.
The drive terminal is locked out. The auxiliary drive at the return terminal is not.
The emergency drive intended for rescue is a way to move the rope during inspection.
Real isolation-point structure, illustrative tags, equipment that does not exist. Free to read and download. An example to learn from — not a document to adopt.
Annual haul rope inspection with tower sheave assembly change. ANSI B77.1. Evacuation drive must remain available throughout.
- 11 isolation points
- 2 must stay energised
The drive and return terminals are one lockout with points at each, verified separately.
Rope clamps and carriage blocks carry apply-and-verify attestations.
Several lifts, one live view of what is locked out where.
Plans are per site, per year, unlimited users — see pricing.