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2. Polycarbonate - Wikipedia

   en.wikipedia.org/wiki/Polycarbonate

   Polycarbonate. Polycarbonates (PC) are a group of thermoplastic polymers containing carbonate groups in their chemical structures. Polycarbonates used in engineering are strong, tough materials, and some grades are optically transparent. They are easily worked, molded, and thermoformed. Because of these properties, polycarbonates find many ...

3. Self-tapping screw - Wikipedia

   en.wikipedia.org/wiki/Self-tapping_screw

   A self-tapping screw is a screw that can tap its own hole as it is driven into the material. More narrowly, self-tapping is used only to describe a specific type of thread-cutting screw intended to produce a thread in relatively soft material or sheet materials, excluding wood screws. Other specific types of self-tapping screw include self ...

4. Purlin - Wikipedia

   en.wikipedia.org/wiki/Purlin

   A purlin (or historically purline, purloyne, purling, perling) is a longitudinal, horizontal, structural member in a roof. In traditional timber framing there are three basic types of purlin: purlin plate, principal purlin, and common purlin. Purlins also appear in steel frame construction. Steel purlins may be painted or greased for protection ...

5. Plastic extrusion - Wikipedia

   en.wikipedia.org/wiki/Plastic_extrusion

   Plastics extrusion is a high-volume manufacturing process in which raw plastic is melted and formed into a continuous profile. Extrusion produces items such as pipe/tubing, weatherstripping, fencing, deck railings, window frames, plastic films and sheeting, thermoplastic coatings, and wire insulation. This process starts by feeding plastic ...

6. ABC Supply - Wikipedia

   en.wikipedia.org/wiki/ABC_Supply

   Website. www.abcsupply.com. ABC Supply Co., Inc. is a major, private American roofing supply company based in Beloit, Wisconsin. It also sells windows, gutters, and siding for residential and commercial buildings and is the largest roofing and vinyl siding wholesale distributor in the United States. [3]

7. Nail (fastener) - Wikipedia

   en.wikipedia.org/wiki/Nail_(fastener)

   In woodworking and construction, a nail is a small object made of metal (or wood, called a tree nail or "trunnel") which is used as a fastener, as a peg to hang something, or sometimes as a decoration. [1] Generally, nails have a sharp point on one end and a flattened head on the other, but headless nails are available.