Posted blogs are informative, they pertain to the care, maintenance and caring for commercial door hardware.  A great resource for anyone who services or installs commercial door hardware, but also valuable in the selection process.  Knowing what type of door hardware is required for specific openings is necessary when complying with building codes. The content represents the authors knowledge of subject matter. The books: Door Hardware Simplified, and Installing Door Hardware Simplified was the source for most of the blogs content . Please feel free to copy, and distribute these to any entity related to its subject matter, and provide credit to Door Hardware Simplified.