What requirements apply where a lifting appliance transfers between rail tracks?

Question

Which requirements apply to lifting-appliance rail tracks (excluding tower-crane and railway-crane tracks), tracks for suspended load trolleys or electric hoists fitted with switches or turntables, and transfer points where an appliance or its load trolley moves from one track to another?

Answer choices

1. Automatic interlocks must prevent a trolley or electric hoist from running off the rail onto the cantilever of a disconnected track section.
2. Locks must have electrical interlocks that prevent transfer when a lock is open.
3. Transfer must be smooth, without jamming.
4. All the listed requirements.

Explanation

Clause 199 of the Russian industrial safety rules for lifting appliances requires all the measures listed in this question:

• smooth movement without jamming;
• electrically interlocked locks that prevent transfer while unlocked;
• automatic interlocks against a trolley or electric hoist running off a disconnected section.

The combined answer is therefore correct. The relevant clause of the rules also contains other requirements for operating controls and equipment shutdown.