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  2. Franki piling system - Wikipedia

    en.wikipedia.org/wiki/Franki_Piling_System

    Small charges of concrete can be added while the base is being formed [6] to enlarge the base and improve the pile’s settlement performance. [3] Franki piles can be installed raked (or sloped) with a tilt of up to 4:1. [5] Raked Franki piles are always reinforced and are particularly suitable for structures subject to dynamic forces. [1]

  3. Senary - Wikipedia

    en.wikipedia.org/wiki/Senary

    Additionally, since the smallest four primes (2, 3, 5, 7) are either divisors or neighbors of 6, senary has simple divisibility tests for many numbers. Furthermore, all even perfect numbers besides 6 have 44 as the final two digits when expressed in senary, which is proven by the fact that every even perfect number is of the form 2 p – 1 (2 p ...

  4. Screw piles - Wikipedia

    en.wikipedia.org/wiki/Screw_piles

    A screw pile. Screw piles [2] were first described by the Irish civil engineer Alexander Mitchell in a paper in Civil Engineer and Architect's Journal in 1848; however, helical piles had been used for almost a decade by this point. [3]

  5. Interference of the footings - Wikipedia

    en.wikipedia.org/wiki/Interference_of_the_footings

    Stuart [1] was the first pioneer to study the interference phenomenon of closely spaced surface strip footing. He examined the effect of footing interference on ultimate bearing capacity of strip footings by theoretical analysis using limit equilibrium method, assuming a non-linear failure surface wherein the cross-section composed of logarithmic spiral and straight line portion tangent to the ...

  6. Foundation (engineering) - Wikipedia

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

    Shallow foundations of a house versus the deep foundations of a skyscraper. Foundation with pipe fixtures coming through the sleeves. In engineering, a foundation is the element of a structure which connects it to the ground or more rarely, water (as with floating structures), transferring loads from the structure to the ground.

  7. Grade beam - Wikipedia

    en.wikipedia.org/wiki/Grade_beam

    A grade beam or grade beam footing is a component of a building's foundation. It consists of a reinforced concrete beam that transmits the load from a bearing wall into spaced foundations such as pile caps or caissons. [ 1 ]

  8. Straightedge and compass construction - Wikipedia

    en.wikipedia.org/wiki/Straightedge_and_compass...

    A regular n-gon has a solid construction if and only if n=2 a 3 b m where a and b are some non-negative integers and m is a product of zero or more distinct Pierpont primes (primes of the form 2 r 3 s +1). Therefore, regular n-gon admits a solid, but not planar, construction if and only if n is in the sequence

  9. Mechanically stabilized earth - Wikipedia

    en.wikipedia.org/wiki/Mechanically_stabilized_earth

    In the 1960s French engineer Henri Vidal invented the modern form of MSE, termed Terre Armee (reinforced earth) using steel strip reinforcements. The first geosynthetic-reinforced soil walls were built in France in 1970 and 1971. [ 5 ]