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  2. Concrete slab - Wikipedia

    en.wikipedia.org/wiki/Concrete_slab

    A slab is ground-bearing if it rests directly on the foundation, otherwise the slab is suspended. [3] For multi-story buildings, there are several common slab designs (see § Design for more types): Beam and block, also referred to as rib and block, is mostly used in residential and industrial applications. This slab type is made up of pre ...

  3. Abacus (architecture) - Wikipedia

    en.wikipedia.org/wiki/Abacus_(architecture)

    In classical architecture, the shape of the abacus and its edge profile varies in the different classical orders. In the Greek Doric order, the abacus is a plain square slab without mouldings, supported on an echinus. [2] In the Roman and Renaissance Doric orders, it is crowned by a moulding (known as "crown moulding").

  4. Waffle slab foundation - Wikipedia

    en.wikipedia.org/wiki/Waffle_slab_foundation

    Waffle slab foundations adhere to International Building Code requirements. By 2008, most states put into effect the changes adopted in the 2006 IBC and, in regards to foundations, the on-grade mat foundation has become a more attractive design because, as an engineered system, it already accommodates the 2008 design recommendations, and required no major modifications to bring it into compliance.

  5. Arching or compressive membrane action in reinforced concrete ...

    en.wikipedia.org/wiki/Arching_or_Compressive...

    Park's approach was based on rigid plastic slab strip theory, and required the assumption of a critical deflection of one half of the slab depth at failure. Park's approach was later extended by Park and Gamble [ 9 ] in their method for predicting the plastic load-deformation response of laterally restrained slabs.

  6. Foundation (engineering) - Wikipedia

    en.wikipedia.org/wiki/Foundation_(engineering)

    Another common type of shallow foundation is the slab-on-grade foundation where the weight of the structure is transferred to the soil through a concrete slab placed at the surface. Slab-on-grade foundations can be reinforced mat slabs, which range from 25 cm to several meters thick, depending on the size of the building, or post-tensioned ...

  7. NPS urges caution amid Kilauea's volcanic activity after ...

    www.aol.com/nps-urges-caution-amid-kilaueas...

    The National Park Service is cautioning spectators to heed warnings and safety precautions after the latest eruption of Hawaii's Kilauea volcano, one of the most active in the world. Kilauea began ...

  8. Shallow foundation - Wikipedia

    en.wikipedia.org/wiki/Shallow_foundation

    Slab-on-grade foundations should not be used in areas with expansive clay soil. While elevated structural slabs actually perform better on expansive clays, it is generally accepted by the engineering community that slab-on-grade foundations offer the greatest cost-to-performance ratio for tract homes.

  9. Grading (earthworks) - Wikipedia

    en.wikipedia.org/wiki/Grading_(earthworks)

    Section through railway track and foundation showing the sub-grade. Grading in civil engineering and landscape architectural construction is the work of ensuring a level base, or one with a specified slope, [1] for a construction work such as a foundation, the base course for a road or a railway, or landscape and garden improvements, or surface drainage.