Is a ladder a type of bridge? It connects two points together, especially in order to bridge some sort of gap, just like a bridge does. They’re just usually not as big as actual bridges, and are used more for the vertical plane than the horizontal one.
I’ve always been wary of ladders. I don’t really care for the “don’t walk under a ladder” superstition, but otherwise, I’m always afraid that one might collapse on me if I’m standing underneath, or collapse when I’m on the topmost rung. Not to mention that I’m a little altophobic – just a little, though. But I can’t deny their usefulness, especially for bunk beds. Bunk beds are nice, and how does one get to the top bunk without some sort of ladder? If you can get to the top bunk without one, it means the bunk bed isn’t tall enough and you should get another one. I’ve even seen bunk beds where you can go down a slide to get to the ground. Just make sure you don’t roll off during your sleep!