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2. List of steel producers - Wikipedia

   en.wikipedia.org/wiki/List_of_steel_producers

   This is a list of the largest steel-producing companies in the world mostly based on the list by the World Steel Association.The list ranks steelmakers by volume of steel production in millions of tons over time and includes all steelmakers with production over 10 million in 2021.

3. Sheet Metal and Air Conditioning Contractors' National ...

   en.wikipedia.org/wiki/Sheet_Metal_and_Air...

   SMACNA standards and manuals address all facets of the sheet metal industry, from duct construction and installation to indoor air quality and air pollution control, from energy recovery to roofing. SMACNA's Technical Resources Department fields several thousand technical questions annually from architects, engineers, manufacturers and ...

4. Sheet metal - Wikipedia

   en.wikipedia.org/wiki/Sheet_metal

   Sheet metal is available in flat pieces or coiled strips. The coils are formed by running a continuous sheet of metal through a roll slitter. In most of the world, sheet metal thickness is consistently specified in millimeters. In the U.S., the thickness of sheet metal is commonly specified by a traditional, non-linear measure known as its ...

5. Hendrick Manufacturing Company - Wikipedia

   en.wikipedia.org/wiki/Hendrick_Manufacturing_Company

   Hendrick Manufacturing Company is an American perforated metal manufacturer founded in 1876 in Carbondale, Pennsylvania, where it is still based.Over the years, additional manufacturing locations were established in California, Tennessee, Kentucky and Illinois.

6. Mill test report (metals industry) - Wikipedia

   en.wikipedia.org/wiki/Mill_test_report_(metals...

   A mill test report (MTR) and often also called a certified mill test report, certified material test report, mill test certificate (MTC), inspection certificate, certificate of test, or a host of other names, is a quality assurance document used in the metals industry that certifies a material's chemical and physical properties and states a product made of metal (steel, aluminum, brass or ...

7. List of commercially available roofing materials - Wikipedia

   en.wikipedia.org/wiki/List_of_commercially...

   Metal shakes or shingles. Long life. High cost, suitable for roofs of 3:12 pitch or greater. Because of the flexibility of metal, they can be manufactured to lock together, giving durability and reducing assembly time. For a discussion of copper system shingles, see Copper in architecture#Wall cladding.