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A stair tread is the horizontal portion of a set of stairs on which a person walks. The tread can be composed of wood, metal, plastic, or other materials. In residential settings, treads can be covered in carpeting. Stair treads can come in non-slip varieties, particularly in commercial or industrial locations. [1]
These stairs often (including this example) illustrate the mathematical principle of glide plane symmetry: the mirror image with respect to the vertical center plane corresponds to a shift by one step. Alternating tread stairs are sometimes referred to as "witches stairs", in the supposed belief that they were created during an earlier era as ...
The regulation contains a detailed set of rules that must be followed when installing new steps in settings like municipal buildings, industrial plants, schools, etc. Perhaps the most recognizable standard in California's Title 24 building code is the need for a slip-resistant tread or nosing that is of contrasting color from the steps. This ...
The model shown here, retrofitted with metal steps in the 1990s, is among the oldest of the store's 40 escalators. Otis "L-type" escalators with distinctive wood treads (not shown) have operated in the store since 1927. Wooden treads on a 1930s Otis escalator, formerly at Wynyard railway station, Sydney, Australia
The 8" rubber all-terrain wheels are great for both indoor and outdoor use, the hand brakes are easy to maneuver and the 5-year warranty on all brake parts is a nice added bonus.
Schroeder stairs; Shepherd's Steps; Small Staircase in Kalemegdan Park; Smokeproof enclosure; Spanish Steps; Spanish Steps (Tacoma, Washington) Stair climbing; Stair lift; Stair nosing; Stair rod; Stair tread; Staircase; Staircase of Santa Maria del Monte; Staircase tower; Staircases in Mariahilf; Stairways in Naples; Strudlhofstiege
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