[4] All stair tread installations must comply with Regulation 302 of the ADA Standards for Accessible Design.
[5] The Dylan's Candy Bar flagship location features a stair case consisting of 53 resin stair treads and three landings that are embedded with real candy and equipped with inserted abrasion strips.
[6] As part of the Underground Shopping Center Public Art Project, the Seoul Metropolitan Facilities Management Corporation built a piano staircase in the underground passage at Euljiro 1-ga Station.
[8] Johns Hopkins University students turned a Hackerman Hall staircase into a piano, with a new note per step.
The Hopkins Robotics Club modified the staircase so the treads played the C scale.