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  2. Rain gutter - Wikipedia

    en.wikipedia.org/wiki/Rain_gutter

    Finlock concrete gutter units are made up of two troughs – one is the visible gutter and the other sits across the cavity wall. The blocks which can range from 8 to 12 inches (200 to 300 mm) can be joined using reinforcing rods and concrete , to form lintels for doors and windows.

  3. Equivalent annual cost - Wikipedia

    en.wikipedia.org/wiki/Equivalent_annual_cost

    Estimating the cost savings required to justify the purchase of new equipment. [13] Determining the cost of continuing with existing equipment. [14] Where an asset undergoes a major overhaul, and the cost is not fully reflected in salvage values, to calculate the optimum life (i.e., lowest EAC) of holding on to the asset. [15]

  4. Plastic pipework - Wikipedia

    en.wikipedia.org/wiki/Plastic_pipework

    Plastic Pipe lengths manufactured in Australia by extruding HDPE material.. Plastic pipe is a tubular section, or hollow cylinder, made of plastic.It is usually, but not necessarily, of circular cross-section, used mainly to convey substances which can flow—liquids and gases (fluids), slurries, powders and masses of small solids.

  5. Manning formula - Wikipedia

    en.wikipedia.org/wiki/Manning_formula

    Note: the Strickler coefficient is the reciprocal of Manning coefficient: Ks =1/ n, having dimension of L 1/3 /T and units of m 1/3 /s; it varies from 20 m 1/3 /s (rough stone and rough surface) to 80 m 1/3 /s (smooth concrete and cast iron). The discharge formula, Q = A V, can be used to rewrite Gauckler–Manning's equation by substitution for V.

  6. Downspout - Wikipedia

    en.wikipedia.org/wiki/Downspout

    The purpose of a downspout is to allow water from a gutter to reach the ground without dripping or splashing down the building structure. Downspouts are usually vertical and usually extend down to ground level , although may be routed at an angle to avoid architectural features and may discharge onto an intermediate roof.

  7. Isocost - Wikipedia

    en.wikipedia.org/wiki/Isocost

    The cost-minimization problem of the firm is to choose an input bundle (K,L) feasible for the output level y that costs as little as possible. A cost-minimizing input bundle is a point on the isoquant for the given y that is on the lowest possible isocost line. Put differently, a cost-minimizing input bundle must satisfy two conditions:

  8. Sulfur concrete - Wikipedia

    en.wikipedia.org/wiki/Sulfur_concrete

    Sulfur concrete has a low porosity and is a poorly permeable material. Its low hydraulic conductivity slows down water ingress in its low porosity matrix and so decreases the transport of harmful chemical species, such as chloride (pitting corrosion), towards the steel reinforcements (physical protection of steel as long as no microcracks develop in the sulfur concrete matrix).

  9. Through arch bridge - Wikipedia

    en.wikipedia.org/wiki/Through_arch_bridge

    A well-known example of this type is the Sydney Harbour Bridge in Australia, which is based on the Hell Gate Bridge in New York City. [2] Other bridges include the Chaotianmen Bridge in China, the world's longest through arch bridge; [3] Tyne Bridge of Newcastle upon Tyne; the Bayonne Bridge that connects New York City to New Jersey, which is longer than the Sydney Harbour Bridge; the Ahwaz ...

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