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1 He/she will likely be using a step-to pattern in which he/she places both feet on each step. 2  18-20 months-By the time your child is this age, he/she should be able to walk down the stairs as well, placing both feet on each step and using a railing for support.
Submit. Â· just now. Report Abuse. Well, if you climb it like a regular person, it would take a looooooong time, but if you climb it like the runners who race up those stairs every year in the Empire State Building Run Up race, it would take under ten minutes to climb all 1576 stairs (see links, below). Good luck!... :-D.