Lesson plan
Transite
Transite originated as the trademark "Transite Asbestos Wood" (Johns Manville Incorporated applied for registration on March 21, 1923 and claimed use since 1907 ; was used in an advertisement in 1909 ). Was also used as the brand "Transite Pipe" by Johns-Manville for an asbestos-cement pipe, produced under a license obtained in 1929 from the Eternit Pietra Artificiale, S.A. of Genoa, Italy. In time it became a generic term for other companies' similar asbestos-cement products, and later an even more generic term for a hard, fireproof composite material, fibre cement boards, typically used in wall construction. It can also be found in insulation, siding, roof gutters, and cement wallboard. The more prevalent transite found in wall construction and roofing tiles for example, will last anywhere from 50 years to over 100 years. The use of asbestos, a proven carcinogen, to manufacture transite was phased out in the 1980s. It was replaced by crystalline silica, which the International Agency for Research on Cancer has classified as being carcinogenic to humans (Class 1). Crystalline silica is also known to cause silicosis, a non-cancerous lung disease.
Article summary
Transite originated as the trademark "Transite Asbestos Wood" (Johns Manville Incorporated applied for registration on March 21, 1923 and claimed use since 1907 ; was used in an advertisement in 1909 ). Was also used as the brand "Transite Pipe" by Johns-Manville for an asbestos-cement pipe, produced under a license obtained in 1929 from the Eternit Pietra Artificiale, S.A. of Genoa, Italy. In time it became a generic term for other companies' similar asbestos-cement products, and later an even more generic term for a hard, fireproof composite material, fibre cement boards, typically used in wall construction. It can also be found in insulation, siding, roof gutters, and cement wallboard. The more prevalent transite found in wall construction and roofing tiles for example, will last anywhere from 50 years to over 100 years. The use of asbestos, a proven carcinogen, to manufacture transite was phased out in the 1980s. It was replaced by crystalline silica, which the International Agency for Research on Cancer has classified as being carcinogenic to humans (Class 1). Crystalline silica is also known to cause silicosis, a non-cancerous lung disease.
Key claims
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
Bibliography
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Key claims and bibliography are generated from the same tracked claims and sources as the article page.