The first escalator was introduced to the public at Coney Island, New York City in 1896. Though, this particular device was a little more than an inclined belt with cast-iron slats on the surface for traction. Nowadays, millions of people use modern escalators with ribbed steps. This feature is not a designer’s move, but rather, a very important element of a big mechanical device.
from BrightSide RSS https://brightside.me/wonder-curiosities/why-are-steps-on-every-escalator-in-the-world-ribbed-631710/
via IFTTT
