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2. Stairs - Wikipedia

   en.wikipedia.org/wiki/Stairs

   Steps should have level treads, they may have open risers but if so treads should overlap at least 16mm. Domestic private stairs are likely to be used by children under 5 years old so the handrail ballister spacing should be constructed so that a 100mm diameter sphere cannot pass through the opening in the risers in order to prevent children ...

3. Stair tread - Wikipedia

   en.wikipedia.org/wiki/Stair_tread

   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]

4. Steel square - Wikipedia

   en.wikipedia.org/wiki/Steel_square

   Theoretical rise and run of stringer, placement of square, marking of tread and rise, dropping the stringer, ABC=90°, total rise of stringer = 2R-T, total run of stringer = 2AB. Stairs usually consist of three components. They are the stringer, the tread and the riser. The stringer is the structural member that carries the load of the ...

5. Escalator - Wikipedia

   en.wikipedia.org/wiki/Escalator

   Seeberger escalators featured flat treads and smooth risers; other escalator models have cleated treads and smooth risers. The steps are linked by a continuous metal chain that forms a closed loop. The front and back edges of the steps each have two wheels, the rear of which are set further apart and fit into the trailer-wheel track while the ...

6. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

7. Stair nosing - Wikipedia

   en.wikipedia.org/wiki/Stair_nosing

   The nosing is the protrusion beyond the riser when vertical risers are used, or beyond the back of the tread below, when angled risers or no risers are used. Anti-slip strips or nosings may be applied. These stair parts can be manufactured from a variety of materials including aluminum, vinyl, and wood.

8. The main thing cellphone users can't live without, according ...

   www.aol.com/news/main-thing-cellphone-users-cant...

   Intentional tech use will be on the rise in 2025, Amazon's Werner Vogels said. ... a timer, a calculator, a calendar, a directory, directions, notes ... The company treads a careful line when ...

9. Staircase - Wikipedia

   en.wikipedia.org/wiki/Staircase

   Good lighting is important in a staircase so users see where they are going and to prevent falls. [6] There is often a window on the wall to let in daylight.In many cases, indoor stairs are placed far inside the building structure, and it is often not easy to get access to a wall on the outside where it would be natural to have a regular window for letting daylight in.