The Spiral LH-HZ (Low Headroom Hurricane Zone) door brings high speed and high security to applications with unique space limitations in high wind velocity hurricane zones. Heavy-duty reinforced hinges and rigid aluminum slats provide the strength required to handle hurricane-force winds. Miami-Dade County, Florida NOA No. 23-0929.05 and Florida Product Approval FL# FL28502-R3. Certified to withstand winds up to 175 miles per hour. The Spiral LH-HZ door is ideal for government, parking, security, automotive dealerships. Spiral LH-HZ is backed by a 5-year limited warranty on motor/mechanical components and materials, plus a 2-year limited warranty on electrical components.