Multi-Keyway Systems: Combining Open Keyways with Restricted Patent Profiles
Engineering Overview: Architectural guide on combining open commercial keyways for tenant doors with restricted patented keyways for high-security infrastructure.
Technical & Engineering Specifications
| Standard | BHMA / EN 1303 Security Planning |
|---|---|
| Strategy | Hybrid Open / Restricted Multi-Keyway Architecture |
| Cost Optimization | Up to 40% savings on large-scale door schedules |
| Restricted Keyway Patent | Valid international utility patent protection |
Cost-Optimized Facility Keying
In large commercial developments, outfitting every interior closet with expensive restricted keyways is cost-ineffective.
Hybrid Multi-Keyway Strategy
- Perimeter & Infrastructure (Restricted Profile): Exterior entrances, server rooms, and executive offices utilize patented restricted keyways.
- Interior Secondary Doors (Open Profile): Standard storage closets use standard commercial key profiles, cutting overall project hardware costs by 40% while maintaining perimeter control.
Frequently Asked Engineering & Selection Questions
Q1: Why combine open and restricted keyways in one facility?
It saves budget by using standard keyways for low-risk interior closets while protecting critical perimeter and server rooms with patented restricted keys.