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Hurricane shutters, also known as storm shutters, are essential protective installations designed to shield properties from the destructive forces of high winds and flying debris during severe weather events. They are particularly vital in regions prone to hurricanes, storms, and strong winds, as they help prevent structural damage and ensure the safety of occupants.
To ensure hurricane shutters can withstand extreme wind conditions, they undergo rigorous wind loading tests. In the UK, compliance with standards such as BS EN 12424 and BS EN 12444 is mandatory for shutters installed over doorways. These standards classify the wind loads that doors and shutters must endure when closed. For external facades, a minimum of Wind Class 2, equivalent to withstanding winds up to 59 mph, is required.
The maximum tested roller shutter, however, is certified to Wind Class 5, which equates to wind speeds of up to 93 mph. This level of protection ensures superior performance during severe weather conditions, offering peace of mind to property owners.
The testing process involves applying differential pressure to both sides of the closed shutter to simulate real-world wind conditions. This ensures that the shutters can maintain their integrity and functionality under high wind pressures.
In urban areas or properties with closely spaced buildings, the wind tunnel effect can significantly amplify wind speeds. As wind is funneled through narrow spaces, gusts can intensify beyond the measured wind speeds, creating additional pressure on structures and roller shutters.
Moreover, gusts of wind, which are sudden and temporary increases in wind speed, can cause short-term spikes in the force exerted on shutters. This makes it crucial to select shutters that are not only wind-rated but also designed to handle these unpredictable bursts of wind.
By choosing roller shutters tested for high wind classes, property owners can ensure protection against both sustained winds and the intensified effects of gusts and wind tunnels. This level of preparedness is essential for safeguarding homes and businesses in areas susceptible to severe weather events.