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2. Polycarbonate - Wikipedia

   en.wikipedia.org/wiki/Polycarbonate

   Thermally processed material is usually totally amorphous, [7] and as a result is highly transparent to visible light, with better light transmission than many kinds of glass. Polycarbonate has a glass transition temperature of about 147 °C (297 °F), [8] so it softens gradually above this point and flows above about 155 °C (311 °F). [9]

3. Twinwall plastic - Wikipedia

   en.wikipedia.org/wiki/Twinwall_plastic

   Twinwall Polycarbonate sheeting is primarily installed with glazing bars, which secure the sheets down to the frame, whether timber, metal or other framing material. The type of glazing bar used it critical for the strength of the roof and depends on the thickness of polycarbonate and structure design.

4. Fracture toughness - Wikipedia

   en.wikipedia.org/wiki/Fracture_toughness

   In materials science, fracture toughness is the critical stress intensity factor of a sharp crack where propagation of the crack suddenly becomes rapid and unlimited. A component's thickness affects the constraint conditions at the tip of a crack with thin components having plane stress conditions and thick components having plane strain ...

5. List of commercially available roofing materials - Wikipedia

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

   Roofing material is the outermost layer on the roof of a building, sometimes self-supporting, but generally supported by an underlying structure. A building's roofing material provides shelter from the natural elements. The outer layer of a roof shows great variation dependent upon availability of material, and the nature of the supporting ...

6. Florida Roof Choices: Comparing Durability, Cost, and Style - AOL

   www.aol.com/florida-roof-choices-comparing...

   Steel roofing materials are treated with protective coatings to help keep them from rusting, but those coatings need regular maintenance and re-application. Keeping the roof and coating in good ...

7. Strengthening mechanisms of materials - Wikipedia

   en.wikipedia.org/wiki/Strengthening_mechanisms...

   The steel frame used to make the building should be as strong as possible so that it does not bend under the entire weight of the building. Polymeric roofing materials would also need to be strong so that the roof does not cave in when there is build-up of snow on the rooftop.