Double stair | Article about double stair by The Free Dictionary
An open stair having a pair of staircases leading down from a landing; usually designed to be impressive; compare with double-return stair.
References in classic literature
A square balustraded gallery ran round the top of the old hall, approached by a double stair
A square balustraded gallery ran round the top of the old hall, approach by a double stair
That led to a showdown in the final 15minutes on the double stairs