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  2. Pile integrity test - Wikipedia

    en.wikipedia.org/wiki/Pile_integrity_test

    Pile integrity testing using low-strain tests such as the TDR (Transient Dynamic Response) method, is a rapid way of assessing the continuity and integrity of concrete piled foundations. The test measures: pile length, or depth to anomalies; pile head stiffness; pile shaft mobility, which is dependent on pile section and concrete properties

  3. Properties of concrete - Wikipedia

    en.wikipedia.org/wiki/Properties_of_concrete

    Concrete has a very low coefficient of thermal expansion, and as it matures concrete shrinks. All concrete structures will crack to some extent, due to shrinkage and tension. Concrete which is subjected to long-duration forces is prone to creep. The density of concrete varies, but is around 2,400 kilograms per cubic metre (150 lb/cu ft). [1]

  4. Proof test - Wikipedia

    en.wikipedia.org/wiki/Proof_test

    A proof test is a form of stress test to demonstrate the fitness of a load-bearing or impact-experiencing structure. An individual proof test may apply only to the unit tested, or to its design in general for mass-produced items. Such a structure is often subjected to loads above those expected in actual use, demonstrating safety and design margin.

  5. Concrete cone failure - Wikipedia

    en.wikipedia.org/wiki/Concrete_cone_failure

    Under tension loading, the concrete capacity of a single anchor is calculated assuming an inclination between the failure surface and surface of the concrete member of about 35°. The concrete cone failure load N 0 {\displaystyle N_{0}} of a single anchor in uncracked concrete unaffected by edge influences or overlapping cones of neighboring ...

  6. Factor of safety - Wikipedia

    en.wikipedia.org/wiki/Factor_of_safety

    In engineering, a factor of safety (FoS) or safety factor (SF) expresses how much stronger a system is than it needs to be for an intended load.Safety factors are often calculated using detailed analysis because comprehensive testing is impractical on many projects, such as bridges and buildings, but the structure's ability to carry a load must be determined to a reasonable accuracy.

  7. Ancient footprints really are oldest traces of humans in the ...

    www.aol.com/ancient-footprints-really-oldest...

    The discovery of fossilized footprints made in what’s now New Mexico was a bombshell moment for archaeology, seemingly rewriting a chapter of the human story. New research is offering further ...

  8. Stone Age footprints are earliest evidence of humans in North ...

    www.aol.com/fossil-footprints-show-humans-north...

    Fossil footprints show humans in North America more than 21,000 years ago, the earliest firm evidence for humans in the Americas and show people must have arrived here before the last Ice Age.

  9. Footprint - Wikipedia

    en.wikipedia.org/wiki/Footprint

    Footprints of Bigfoot, a cryptozoological animal, are said to give proof to its existence. Sri Pada , or Adam's Peak , a mountain in Sri Lanka , has a large footprint-shaped impression in the rock at its summit, said by various religious adherents to be that of the Buddha, Shiva or Adam .

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