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2. Stairs - Wikipedia

   en.wikipedia.org/wiki/Stairs

   The dimensions of a stair, in particular the rise height and going of the steps, should remain the same along the stairs. [14] The following stair dimensions are important: The rise height or rise of each step is measured from the top of one tread to the next. It is not the physical height of the riser; the latter excludes the thickness of the ...

3. Floor area - Wikipedia

   en.wikipedia.org/wiki/Floor_area

   Hong Kong law Chapter 123F, Building (Planning) Regulations, Regulation 23 sect 3 sub-paragraph (a) defined that: Subject to sub-paragraph (b), for the purposes of regulations 19, 20, 21 and 22, the gross floor area of a building shall be the area contained within the external walls of the building measured at each floor level (including any floor below the level of the ground), together with ...

4. Stair lift - Wikipedia

   en.wikipedia.org/wiki/Stair_lift

   Outdoor stair lifts are available for straight and curved staircases. They operate similar to indoor stair lifts but include weather-resistant features to help the unit withstand extreme harsh temperatures and weather conditions. Most often, outdoor stair lifts are used on staircases for decks, home entryways or lake access.

5. The best stair lift for 2025: Chair lifts that make ... - AOL

   www.aol.com/lifestyle/best-stair-lift-134610076.html

   With 12.2% of Americans struggling to walk or climb stairs, a stair lift can make a major difference in accessibility at home. Those who face mobility issues, such as seniors, people recovering ...

6. Smokeproof enclosure - Wikipedia

   en.wikipedia.org/wiki/Smokeproof_enclosure

   [8] [4] Of course, a higher pressure within a stairwell makes it harder to open doors from the building interior to the enclosed vestibules and to the enclosed stairwell. [9] The Life Safety Code requires that the pressure differential across the barrier not be so great as to prevent the door from opening with a force of 30 lbf (133 N ) at the ...

7. 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. In buildings with several housing units, a stairway can be a necessary common area for getting to ...