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  2. I-beam - Wikipedia

    en.wikipedia.org/wiki/I-beam

    I-beams are still available in US sizes from many Canadian manufacturers. In Mexico, steel I-beams are called IR and commonly specified using the depth and weight of the beam in metric terms. For example, a "IR250x33" beam is approximately 250 mm (9.8 in) in depth (height of the I-beam from the outer face of one flange to the outer face of the ...

  3. Rail profile - Wikipedia

    en.wikipedia.org/wiki/Rail_profile

    Sizes under 100 lb/yd (49.6 kg/m) rail are usually for lighter duty freight, low use trackage, or light rail. Track using 100 to 120 lb/yd (49.6 to 59.5 kg/m) rail is for lower speed freight branch lines or rapid transit ; for example, most of the New York City Subway system track is constructed with 100 lb/yd (49.6 kg/m) rail.

  4. Beam diameter - Wikipedia

    en.wikipedia.org/wiki/Beam_diameter

    [6] [7] The D4σ beam width is the ISO standard definition and the measurement of the M 2 beam quality parameter requires the measurement of the D4σ widths. [6] [7] [8] The other definitions provide complementary information to the D4σ. The D4σ and knife-edge widths are sensitive to the baseline value, whereas the 1/e 2 and FWHM widths are ...

  5. Ship measurements - Wikipedia

    en.wikipedia.org/wiki/Ship_measurements

    Beam – A measure of the width of the ship. There are two types: Beam, Overall (BOA), commonly referred to simply as Beam – The overall width of the ship measured at the widest point of the nominal waterline. Beam on Centerline (BOC) – Used for multihull vessels. The BOC for vessels is measured as follows: For a catamaran: the ...

  6. Section modulus - Wikipedia

    en.wikipedia.org/wiki/Section_modulus

    h = height, t = wall thickness [1] For the two flanges of an Ɪ-beam with the web excluded = + b 1, b 2 = width, t 1, t 2 = thickness, y 1, y 2 = distances from the neutral axis to the centroids of the flanges respectively. [18] For an I Beam including the web

  7. List of physical quantities - Wikipedia

    en.wikipedia.org/wiki/List_of_physical_quantities

    Measure for the ease with which an object resists conduction of heat K/W L −2 M −1 T 3 Θ: extensive Thermal resistivity R λ: Measure for the ease with which a material resists conduction of heat K⋅m/W L −1 M −1 T 3 Θ: intensive Viscosity: η: The measure of the internal friction in a fluid Pa⋅s L −1 M T −1: intensive, scalar ...

  8. Section beam - Wikipedia

    en.wikipedia.org/wiki/Section_beam

    Section Beams are made of steel and they have a specific lengths and shapes like Ɪ-beam, 'L', C-channel and I flanged beam. These types of section are usually used in steel structures and it is common to connect them with plates of steel.

  9. Deflection (engineering) - Wikipedia

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

    The beam is originally straight, and any taper is slight; The beam experiences only linear elastic deformation; The beam is slender (its length to height ratio is greater than 10) Only small deflections are considered (max deflection less than 1/10 of the span).

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