Overhead Door Corporation’s Knock & Lock^®Breakaway Door System is the industry’s only self-resetting, impact-resistant dock door available. The rugged Knock & Lock^® is designed for higher productivity, energy efficiency and costs 35% less than a complete breakaway door, making it the ideal choice for any dock environment. In addition, the Knock & Lock^®Breakaway Door System offers a rugged, puncture-proof interior skin with a steel exterior for years of trouble-free service. Every panel is polystyrene insulated to 2 inches, providing an R-value of 8.56, and has dual slide locks on the bottom section for security. Every Knock & Lock^®Breakaway Door System is backed by an industry leading 10 year limited warranty. Whether the application requires a breakaway door system or simply breakaway sections for retrofit applications, the Knock & Lock^®Breakaway Door System is the perfect solution for facility managers and architects alike.

Knock and Lock Advantages:

The Knock & Lock self-resetting impact resistant breakaway door system is designed to increase productivity by eliminating costly downtime, door repairs and replacements to keep your facility operating smoothly and efficiently. Knock & Lock is ideal for both new construction and retrofit applications. Performance and Durability Knock & Lock is designed to provide reliable performance for many years and is backed by an industry-leading warranty:
• 10-year retractile cord warranty
• 10-year puncture warranty
• The automatic reset keeps your doors operating after  
impact to eliminate downtime and associated costs
• Breaks away with little force for system longevity
• Single/dual panel breakout (breaks in and out) for  
additional impact-resistance and door system durability
• Puncture-resistant interior skin and steel exterior for  
durability and longevity
• Polystyrene insulation in every section with an R-value of
8.56 for energy-efficiency (U-value .12)
• Dual slide locks standard on each section for extra security
• Wind load up to +43/-50 psf (depending on section width) 
is standard to satisfy application requirements in a variety 
of environmental conditions (Stated wind load is for Knock 
& Lock sections, not entire door. Remaining door sections
may require additional reinforcement depending on size if
wind load is required for the application.)
• Can be field-painted with latex paint to complement the
look of your facility
• 2” rollers for smooth operation
• 3” roller option for additional durability in demanding,
high traffic volume applications
• Available in 6’2”, 8’2”, 9’2”, 10’2”, 11’2”, 12’2” and 16’2”*
section widths and in 24” and 21” section heights to  
satisfy a wide variety of applications