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Tempered glass has defects that cause a window cleaner's most common tool, a scraper, to scratch the glass. In this issue of the American Window Cleaner magazine, fabricating debris forensic investigator Dan Fields takes a deeper look into the problem. Fields says what tempered glass is, how it's made, and what happens while the scraper hits the glass.

Write Right Enterprises Drue Ann Hargis-Ramirez discusses the topic of ergonomics. Research over the last decade by the National Institute for Occupational Safety and Health has confirmed the relationship between work factors and upper extremity, low back, and musculoskeletal disorders. Ramirez relates a window cleaner's repetitive motions to neck and back pain.

In a previous issue, two window cleaners were struggling for their lives 12 stories in the air on the side of a building. They were uninjured, however, OSHA isn't done with the incident. AWC contributor R. Bruce Gebhardt reports OSHA fined the window cleaners' owner and has requested a trial.


  • The United Association of Mobile Contract Cleaners (UAmCc) holds its first convention
  • PNA Distributing Amos Landers discusses the science of "enginuity"
  • How to handle a botched quote
  • International Window Cleaning Association (IWCA) Safety Committee discusses new standards


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