Winner of several awards, including the 2010 Chicago Tribune Heartland Prize for Nonfiction, the 2010 Wellcome Trust Book Prize, and the American Association for the Advancement of Science’s Award for Excellence in Science Writing, the 2011 Audie Award for Best Non-Fiction Audiobook, and a Medical Journalists’ Association Open Book Award, The Immortal Life of Henrietta Lacks was featured on over 60 critics’ best of the year lists. For more reviews, praise, and media coverage of The Immortal Life of Henrietta Lacks , please visit the book’s press page . Also explore the resources found throughout this site for book groups, classrooms, and more. And click here to read excerpts of the book.
A: Section of the 2012 Life Safety Code is discussing Powered Door Leaf Operation, and applies to power assist and power operated doors. This section is not limited to any type of door, such as fire-rated, smoke-resistant, etc. This section applies to all doors with power assist and/or power operated. The six criterions listed under must all be met in order to comply with . Subsection (4) under discusses the situation where the door leaf is required to be self-closing or positive latching and is equipped with power operation and is left in an open position, there must a smoke detector near the door that would activate and cause the door leaf to close and cease operation. Therefore, the power assist function would have to be connected to the fire alarm system. Subsection (4) says the smoke detector must be placed in accordance with NFPA 72, so there are a couple of options: