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The typical deck railing is generally built from pressure treated lumber. [14] Posts on a deck are also typically pressure treated wood and standard sizes are 4x4, 6x6, and 8x8. These posts give structural support to the railing assembly and are the most critical part for the safety of the guard rail assembly. [15]
Aluminum fencing is used for both commercial and residential use. Aluminum fence is generally available preformed, in a wide variety of styles. It tends to be easy to clean, resists weathering and has low maintenance requirements. It can also be more cost-efficient than comparable materials, such as wrought iron and steel.
NALCO has developed AL-59, composed of aluminum with small amounts of magnesium and silicon, it offers good resistance to corrosion, This alloy is used for overhead electrical transmission lines to provide high strength and excellent conductivity.It has contributed with Apar Industries for deploying transmission cables made out of AL-59.
The Bayer process is the principal industrial means of refining bauxite to produce alumina (aluminium oxide) and was developed by Carl Josef Bayer.Bauxite, the most important ore of aluminium, contains only 30–60% aluminium oxide (Al 2 O 3), the rest being a mixture of silica, various iron oxides, and titanium dioxide. [1]
Goldman's ownership of a quarter of the national supply of aluminum – a million and a half tons – in a network of 27 Metro International warehouses in Detroit, Michigan, was blamed. [ 3 ] [ 5 ] To avoid hoarding and price manipulation, the London Metal Exchange requires that "at least 3,000 tons of that metal must be moved out each day".
Straumsvik aluminum smelter, operated by Rio Tinto Alcan in Iceland. Aluminium smelting is the process of extracting aluminium from its oxide, alumina , generally by the Hall-Héroult process . Alumina is extracted from the ore bauxite by means of the Bayer process at an alumina refinery .
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