How steep can stairs be? - Quora

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Is there a standard tread height for stairs? Is tread height governed by any particular building codes? - Quora

How many flights of stairs can you climb before being out of breath? - Quora

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Is a “flight” of steps one set of steps or all the sets from one floor to the next (regardless of how many)? - Quora

How steep are the stairs in an aircraft carrier? - Quora

What are some examples of very steep and dangerous stairs? - Quora