Back in the old days, to get to the perms one would climb a rope ladder. Then, someone figured out that this was probably unsafe and something about which the dirty toolbelt people might be able to sue.
Enter the wall ladder.
If you’ve ever tried to climb a rope ladder, you will agree that a ladder fixed to a wall is much safer.
But still not that safe.
Enter the cage.
The cage prevents said ladder climber from falling to his or her death (or severe injury) and features a handy platform halfway – not for resting, but to allow more than one person to climb the ladder simultaneously. One person climbs the bottom half, and when that person steps off the lower ladder and onto the platform, the next person starts up.
Mostly for safety, but also because no one wants to see what’s up a co-worker’s shorts. Trust me on this one.