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2. RoofTG - Wikipedia

   en.wikipedia.org/wiki/RoofTG

   RoofTG (formerly AHI Roofing [1]) is a manufacturer of stone chip coated metal roof tiles based in Auckland, New Zealand and with plants in New Zealand, United States , Hungary and Malaysia. [2] The company sells under both the Gerard and Decra brand names.

3. Stone-coated metal roofing - Wikipedia

   en.wikipedia.org/wiki/Stone-coated_metal_roofing

   Stone coated metal roofing was refined during and after World War II in the United Kingdom, when the government requested materials that would protect corrugated steel roofs from the harsh climate. A coating of bitumen and subsequent covering by sand , stone or other materials proved effective at protecting the metal roofs and serving as ...

4. Sam Doyle - Wikipedia

   en.wikipedia.org/wiki/Sam_Doyle

   Doyle continued his art practice in the 1940s, showing his paintings on sheet metal at first in his yard that he called his "Outdoor World-Wide-International Gallery". [ 9 ] [ 10 ] [ 11 ] Doyle would use discarded materials such as metal roofing, plywood, and house paint for his art, exhibiting a rudimentary, but unique art style. [ 12 ]

5. Zinc - Wikipedia

   en.wikipedia.org/wiki/Zinc

   [193] [194] It is the second most abundant trace metal in humans after iron and it is the only metal which appears in all enzyme classes. [ 12 ] [ 10 ] In proteins, zinc ions are often coordinated to the amino acid side chains of aspartic acid , glutamic acid , cysteine and histidine .

6. Nissen hut - Wikipedia

   en.wikipedia.org/wiki/Nissen_hut

   Nissen huts, Cultybraggan Camp, close to Comrie, in west Perthshire A Nissen hut is a prefabricated steel structure originally for military use, especially as barracks, made from a 210° portion of a cylindrical skin of corrugated iron.

7. Structural engineering - Wikipedia

   en.wikipedia.org/wiki/Structural_engineering

   The Eiffel Tower in Paris is a historical achievement of structural engineering.. Structural engineering is a sub-discipline of civil engineering in which structural engineers are trained to design the 'bones and joints' that create the form and shape of human-made structures.