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2. Iron and steel industry in the United States - Wikipedia

   en.wikipedia.org/wiki/Iron_and_steel_industry_in...

   Other metals are commonly added to steel to produce alloy steels of various types. Common alloy metals are manganese, nickel, molybdenum, chromium, and vanadium. Stainless steel commonly contains a minimum of 10.5% chromium, and may also contain significant amounts of nickel or molybdenum.

3. Flat roof - Wikipedia

   en.wikipedia.org/wiki/Flat_roof

   A study by Ducker International in 2005 identified the average cost per year of a metal roof to be US$3.2 per square metre ($0.30/sq ft) while single-ply roofs stood at $6.1/m 2 ($0.57/sq ft) and built-up roofing at $4.0/m 2 ($0.37/sq ft).

4. Metal roof - Wikipedia

   en.wikipedia.org/wiki/Metal_roof

   A metal roof is a roofing system featuring metal pieces or tiles exhibiting corrosion resistance, impermeability to water, and long life. It is a component of the building envelope . The metal pieces may be a covering on a structural, non-waterproof roof, or they could be self-supporting sheets.

5. List of building materials - Wikipedia

   en.wikipedia.org/wiki/List_of_building_materials

   This is a list of building materials.. Many types of building materials are used in the construction industry to create buildings and structures.These categories of materials and products are used by architects and construction project managers to specify the materials and methods used for building projects.

6. Copper in architecture - Wikipedia

   en.wikipedia.org/wiki/Copper_in_architecture

   Copper roofing in rural atmospheres corrodes at rates of less than 0.4 mm (1 ⁄ 64 in) in 200 years. [27] Unlike most other metals, copper does not suffer from underside corrosion that can cause premature failures in roofing. With a copper roof, supporting substrates and structures usually fail long before the copper on the roof. [11]

7. AOL Mail

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   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!