Hurricane doors are time-tested and approved by ASTM Regulations. They are mostly used in parts of Northern America which face perennial bout of hurricanes, hailstorms and tornadoes. Hurricane doors are high-impact resistant doors that can withstand a pressure of up to 80 millimeters of mercury.
We take closer look at some of the most frequently asked questions posed by existing users and potential customers. The top 4 figure as follows.
Q1 Can Hurricane doors be installed at higher elevations?
Hurricane doors can withstand wind blowing at high speeds. It can resist high pressure belts and can be installed with relative ease than conventional doors. It can be fixed at a height of 30 feet in the air or even higher in places where the pressure is lower. It need not meet any design configuration.
Q2 Are all hurricane doors available in the market fully impact-resistant products?
Hurricane doors necessarily have to meet the testing regulations set by ASTM. To be considered as a part of the impact-resistant products, Hurricane doors are made to pass through a stringent lab testing condition under the Florida Building Code. With increasing instances of hurricanes and storms hitting the main land of America, disaster management team stick to only top-class segment of hurricane doors.
Hurricane doors usually have an external storm shutter made of impact-resistant structure that shields the door from flying debris and heavy objects. Top manufacturers of Hurricane doors come with Notice of Acceptance and hence are perfectly safe for use. Doors with NOA certification are trusted to be used and installed as Hurricane resistant doors.
Q3 As per NOA terms, what are different types of Hurricane doors?
NOA certifies two types of Hurricane doors. They are:
- Large missile-tested doors
- Small missile-tested doors
Doors tested with large missile guns have to face a six-foot canon with 9-pound 2 by 4 lumber shot at the door sample with speed of 50 feet per second.
Doors tested with the small missile guns have to face a six-foot canon with 9-pound 2 by 4 lumber shot at the door sample with speed of 50 feet per second.
The test for large missiles is done by exposing the door sample against 30 pieces of gravel fired at a speed of over 80 feet per second. In both the tests, the door must be able to withstand the shots without breaking and chipping away.
Q4 Does NOA perform the Wind load calculations for the Hurricane doors?
Yes. Authorities offer NOA Certification only after accurately performing the wind load calculations under practical hurricane conditions. Wind load calculations account for the pressure exerted on the door structure and the frame components by blowing wind. It is tested for garage doors, entry doors as well windows. The wind load pressures are calibrated and marked on the door sample in positive and negative values. The dual number system bears the wind load acting on and away from the building.
Most door installers have little experience in dealing with the hurricane doors, owners usually go with the agencies referred to them by the door manufacturers. In-house door installation service too offer excellent fixing and removal in minimum time frame.