in the any shopping center , mall , metro or any public places you can find the ESCALATOR or Moving walkway (An escalator is a moving staircase which carries people between floors of a building).
here we have the beautiful ESCALATOR or Moving walkway cad block in the dwg format in elevation , plan and side view . just download and enjoy this cad block.
format : DWG
size : 110Kb
source : freecadplan.com