My cabin has a pullman bed, what is it?

We use Pullman beds in some of our staterooms which sleep 3 or more guests, these are beds that pull down from the ceiling, or out of the wall above the main bed, and are accessed by a ladder. We don't allow any guests to use them if they're under 6 years old, over 78" tall, weigh over 300 lbs or have mobility issues.