About OSI315
Your Resource for Door Systems
Industry knowledge and technical resources for commercial door and hardware professionals.
I've spent over 20 years working with commercial door hardware, access control, and security systems across healthcare, education, financial, and commercial facilities. This site is built to be a go-to technical resource — whether you're a property manager troubleshooting a closer, a technician spec'ing hardware for a new install, or a contractor navigating code compliance.
What You'll Find
In-depth articles on commercial door systems, automatic operators, doors and frames, electronic and mechanical hardware, codes and standards, and real-world troubleshooting guides.
Who It's For
Property managers, technicians, contractors, and security professionals who need reliable, no-nonsense information on commercial door and hardware systems.
Why It Exists
Good technical information on commercial doors shouldn't be hard to find. OSI315 puts practical knowledge in one place — written by someone who's been in the field, not behind a marketing desk.