corrugated galvanized iron
21Cross-linked polyethylene — PEX redirects here. For other uses, see Pex (disambiguation). Cross linked polyethylene, commonly abbreviated PEX or XLPE, is a form of polyethylene with cross links. It is formed into tubing, and is used predominantly in hydronic radiant heating …
22Shed — For other uses, see Shed (disambiguation). A rural shed …
23building construction — Techniques and industry involved in the assembly and erection of structures. Early humans built primarily for shelter, using simple methods. Building materials came from the land, and fabrication was dictated by the limits of the materials and… …
24environmental works — ▪ civil engineering Introduction infrastructure that provides cities and towns with water supply, waste disposal, and pollution control services. They include extensive networks of reservoirs, pipelines, treatment systems, pumping stations …
25Nail (fastener) — A pile of nails. In woodworking and construction, a nail is a pin shaped, sharp object of hard metal or alloy used as a fastener. Formerly wrought iron, today s nails are typically made of steel, often dipped or coated to prevent corrosion in… …
26Mining in Iran — Industry and Mining from U.S. Central Intelligence Agency map of Iran 1978. Mining in Iran is under developed. Yet the country is one of the most important mineral producers in the world, ranked among 15 major mineral rich countries,[1] holding… …
27Sharon Steel Corporation — The Sharon Steel Corporation was one a steel plant, and is notable due to its contribution toward the growth of the iron and steel industry in the Shenango River Valley, Mercer County, Pennsylvania. The longest surviving was the Sharon Iron… …
28Steel frame — usually refers to a building technique with a skeleton frame of vertical steel columns and horizontal I beams, constructed in a rectangular grid to support the floors, roof and walls of a building which are all attached to the frame. The… …
29David Rowell & Co. — David Rowell Co. Former type Private Industry Construction Fate Closed Founded 1855 Defunct 1970 Headquarters …
30Galvanic corrosion — This new manifold for water meters has replaced the old one after 4 years of use, having been connected directly to a copper pipe in the building (0.85 V of potential difference, see the point of corrosion in the bottom left). With a PVC battery… …
