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2. Handrail - Wikipedia

   en.wikipedia.org/wiki/Handrail

   Current versions of these codes and standards now agree that handrail is defined as either a circular cross section with an outside diameter of 1 + 1 ⁄ 4 inches (32 mm) minimum and 2 inches (51 mm) maximum or a non-circular cross section with a perimeter dimension of 4 inches (102 mm) minimum and 6 + 1 ⁄ 4 inches (159 mm) maximum and a ...

3. Stairs - Wikipedia

   en.wikipedia.org/wiki/Stairs

   7 Ergonomics and building code requirements. ... Many building codes require stair nosings for commercial, ... Handrail diameter. The size has to be comfortable for ...

4. Staircase - Wikipedia

   en.wikipedia.org/wiki/Staircase

   A stairwell or stair room is a room in a building where a stair is located, and is used to connect walkways between floors so that one can move in height. [1] Collectively, a set of stairs and a stairwell is referred to as a staircase or stairway .

5. 16 Divisions - Wikipedia

   en.wikipedia.org/wiki/16_Divisions

   The 16 Divisions of construction, as defined by the Construction Specifications Institute (CSI)'s MasterFormat, is the most widely used standard for organizing specifications and other written information for commercial and institutional building projects in the U.S. and Canada.

6. 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 ...

7. Bicycle stairway - Wikipedia

   en.wikipedia.org/wiki/Bicycle_stairway

   Accessibility requirements for handrails tend to conflict with bicycle stairways, as handrails may obstruct or decrease the control of a bicyclist using the channel. Suggestions for resolving the conflicts include providing a single handrail down the middle of the stairs with gutters at the outside edges, or placing handrails at both edges and ...