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  2. Stairs - Wikipedia

    en.wikipedia.org/wiki/Stairs

    Stairs may also be a fanciful physical construct such as the "stairs that go nowhere" located at the Winchester Mystery House. The Penrose stairs, devised by Lionel and Roger Penrose, are a famous impossible object. The image distorts perspective in such a manner that the stairs appear to be never-ending, a physical impossibility.

  3. Skyscraper design and construction - Wikipedia

    en.wikipedia.org/wiki/Skyscraper_design_and...

    The invention of the elevator was a precondition for the invention of skyscrapers, given that most people would not (or could not) climb more than a few flights of stairs at a time. The elevators in a skyscraper are not simply a necessary utility like running water and electricity, but are in fact closely related to the design of the whole ...

  4. 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.

  5. Precast concrete - Wikipedia

    en.wikipedia.org/wiki/Precast_concrete

    Precast concrete is a construction product produced by casting concrete in a reusable mold or "form" which is then cured in a controlled environment, transported to the construction site and maneuvered into place; examples include precast beams, and wall panels, floors, roofs, and piles.

  6. Lift slab construction - Wikipedia

    en.wikipedia.org/wiki/Lift_slab_construction

    Lift slab construction (also called the Youtz-Slick Method) is a method of constructing concrete buildings by casting the floor or roof slab on top of the previous slab and then raising (jacking) the slab up with hydraulic jacks. This method of construction allows for a large portion of the work to be completed at ground level, negating the ...

  7. Formwork - Wikipedia

    en.wikipedia.org/wiki/Formwork

    Rebar has been stubbed up out of the concrete slab to form the base of future columns Timber formwork for a concrete column. Adjustable metal screw jacks both stabilize and plumb the form Aluminum formwork system Sketch of the side view of traditional timber formwork used to form a flight of stairs Placing a wall form. A matching form will be ...

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  9. Building - Wikipedia

    en.wikipedia.org/wiki/Building

    A building or edifice is an enclosed structure with a roof and walls, usually standing permanently in one place, [1] such as a house or factory. [1] Buildings come in a variety of sizes, shapes, and functions, and have been adapted throughout history for numerous factors, from building materials available, to weather conditions, land prices, ground conditions, specific uses, prestige, and ...