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NFPA - National Fire Protection Association - is the U.S. authority on fire, electrical and building safety.
NFPA develops, publishes, and disseminates more than 300 consensus codes and standards intended to minimize the possibility and effects of fire and other risks. Virtually every building, process, service, design, and installation in society today is affected by NFPA documents.
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Engineering ToolBox - SketchUp Edition - enabled for use with the amazing, fun and free Google SketchUp