The problem with a conventional ladder is it is hard to store, and harder to get out the window- and you CAN'T get one out the window if you are down one arm, are very young, or very old. This isn't for normal usage, but as an emergency egress ladder. :P

Key word- emergency. As in, I'll die before I get down the stairs. Otherwise, skip the ladder, I'm taking the stairs.
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-IronRaven

When a man dare not speak without malice for fear of giving insult, that is when truth starts to die. Truth is the truest freedom.