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  2. Sheet metal - Wikipedia

    en.wikipedia.org/wiki/Sheet_metal

    The older United States Standard Gauge is based upon 40 lb per square foot per inch thick. Gauge is defined differently for ferrous (iron-based) and non-ferrous metals (e.g. aluminium and brass). The gauge thicknesses shown in column 2 (U.S. standard sheet and plate iron and steel decimal inch (mm)) seem somewhat arbitrary.

  3. Specific weight - Wikipedia

    en.wikipedia.org/wiki/Specific_weight

    The specific weight, also known as the unit weight (symbol γ, the Greek letter gamma), is a volume-specific quantity defined as the weight W divided by the volume V of a material: = / Equivalently, it may also be formulated as the product of density, ρ, and gravity acceleration, g: = Its unit of measurement in the International System of Units (SI) is newton per cubic metre (N/m 3), with ...

  4. Weight plate - Wikipedia

    en.wikipedia.org/wiki/Weight_plate

    A weightlifter holding an Olympic barbell loaded with plates ranging from 5 to 25 kilograms A pair of adjustable dumbbells with "standard" plates Grip plates arranged on a plate holder (or "plate tree") A weight plate is a flat, heavy object, usually made of cast iron, [1] that is used in combination with barbells or dumbbells to produce a bar ...

  5. Area density - Wikipedia

    en.wikipedia.org/wiki/Area_density

    Fabric "weight" is often specified as mass per unit area, grams per square meter (gsm) or ounces per square yard. It is also sometimes specified in ounces per yard in a standard width for the particular cloth. One gram per square meter equals 0.0295 ounces per square yard; one ounce per square yard equals 33.9 grams per square meter.

  6. Density - Wikipedia

    en.wikipedia.org/wiki/Density

    The Imperial gallon was based on the concept that an Imperial fluid ounce of water would have a mass of one Avoirdupois ounce, and indeed 1 g/cm 3 ≈ 1.00224129 ounces per Imperial fluid ounce = 10.0224129 pounds per Imperial gallon.

  7. Grammage - Wikipedia

    en.wikipedia.org/wiki/Grammage

    Grammage and basis weight, in the pulp and paper industry, are the area density of a paper product, that is, its mass per unit of area. Two ways of expressing grammage are commonly used: Expressed in grams (g) per square metre (g/m 2), regardless of its thickness . [1] This is the measure used in most parts of the world.

  8. Surface plate - Wikipedia

    en.wikipedia.org/wiki/Surface_plate

    A 250 mm x 250 mm surface plate A surface plate is a solid, flat plate used as the main horizontal reference plane for precision inspection, marking out (layout), and tooling setup. [ 1 ] The surface plate is often used as the baseline for all measurements to a workpiece, therefore one primary surface is finished extremely flat with tolerances ...

  9. Small Arms Protective Insert - Wikipedia

    en.wikipedia.org/wiki/Small_Arms_Protective_Insert

    SAPI plates meant for body armor come in front and back plates which are identical, and smaller side plates. The front and back plates come in five sizes. Their dimensions are the following: [1] [13] Front and back SAPI plates: Extra Small - 1.27 kg (2.8 lb) | 184 x 292 mm (7¼ x 11½ in) Small - 1.59 kg (3.5 lb) | 222 x 298 mm (8¾ x 11¾ in)