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  2. Stair tread - Wikipedia

    en.wikipedia.org/wiki/Stair_tread

    According to the United States Access Board, stair treads in buildings shall have uniform tread depths that are 11 inches, or 280 mm, at minimum. Treads are not permitted to have a slope steeper than 1:48. [4] All stair tread installations must comply with Regulation 302 of the ADA Standards for Accessible Design. The regulation states that the ...

  3. Stair nosing - Wikipedia

    en.wikipedia.org/wiki/Stair_nosing

    Many states have introduced laws and mandates that require new staircase construction to include an abrasive surface or stair tread to minimize the risk of stairway related incidents. One notable instance of this type of building regulation is 'Title 24, Part 2, Section 2-3326(b)' of the California Energy Commission 's "Building Energy ...

  4. Stairs - Wikipedia

    en.wikipedia.org/wiki/Stairs

    The alternating stairs (3) requires one unit of space per step: the same as the half-width stairs (2), and half as much as the full-width stairs (1). Thus, the horizontal distance between steps is in this case reduced by a factor of two, reducing the size of each step.

  5. Escalator - Wikipedia

    en.wikipedia.org/wiki/Escalator

    The floor plate provides a place for the passengers to stand before they step onto the moving stairs, flush with the rest of the floor and are removable to allow easy engineer access, while the comb bearer sits between the stationary floor plate and the moving step, so named for the cleats on its edge which mesh with the matching cleats on each ...

  6. Tread - Wikipedia

    en.wikipedia.org/wiki/Tread

    Shoe tread, pattern on the bottom of a shoe; Stair tread, horizontal portion of a set of stairs on which a person walks; Tire tread, patterned outer surface of a tyre that makes contact with the road; Tread (river terrace), the level section of a river terrace; Continuous track, a system of vehicle propulsion used in tracked vehicles

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