All you need to run your factory !
With a straight flight staircase, you walk, well,straight up the stairs.A single-flight staircase is without a landing i.e. you get to the top without interruption.A double-flight or multi-flight staircase meansthere are a number of landings on your way up (or down!).Dog-leg staircases have right-angled flights where you do a sort of a U-turn and change direction at the individual landing(s).
See also
