5th September 2024 – (Hong Kong) As typhoon season approaches, residents in vulnerable regions are once again faced with the inevitable task of preparing their homes and communities against the fierce winds and torrential rains. The looming threat raises a critical question: are the common typhoon preparedness practices genuinely effective, or merely comforting rituals? This article delves into the scientific aspects of typhoon preparedness, addressing six frequently asked questions to help safeguard homes and ensure genuine protection.
Q1: Does taping windows with adhesive tape prevent them from breaking during a typhoon?
It’s a common sight during typhoon preparations: businesses and homeowners applying strips of tape to their windows. The belief is that patterns like ‘X’ or grid shapes can fortify glass against strong winds. However, according to the Fire Services Department, while taping can reduce shattering and the scattering of broken glass, it does little to reinforce the window against actual wind pressure.
A local expert highlighted that whether it’s air-tight or traditional aluminium windows, all must pass rigorous wind and rain tests and meet safety standards before being marketed. Tests by the Architecture and Building Research Institute showed that taped ordinary or tempered glass windows did not significantly resist wind pressure. For windows that meet the CNS standard test for tempered glass, additional taping is unnecessary if they are installed correctly.
Q2: If window glass isn’t strong enough, what type of tape is best?
For those still concerned about the wind resistance of their home windows, Central News Agency recommends using tape that is thicker and more elastic than standard packing or clear tape.
The effectiveness of taped windows can also vary based on factors such as the building’s structural design, the window’s size, and how they are fitted. Structural engineers might need to be consulted if there are doubts about a building’s ability to withstand typhoon conditions.
Q3: What typhoon supplies should households prepare?
The Fire Services Department advises checking emergency supplies, including food, water, and flashlights. It’s also wise to stock up on batteries, candles, and basic medical supplies. Preparing for potential water and power outages is crucial.
Q4: How should drainage issues be handled before a typhoon?
The Water Resources Agency urges residents to clear nearby drains of leaves and debris to ensure smooth water flow and reduce flooding risks. If flooding occurs and requires clean-up, local government offices or city management services should be contacted for assistance.
Q5: How should sandbags be used effectively?
Many residents pick up sandbags from local offices, but proper placement is key to their effectiveness. First, a waterproof sheet should line the inner layer at the base. Make sure the sand is free from clumps, which can be achieved by breaking them up manually.
Sandbags can be stacked in several ways to optimize their barrier effect:
- Herringbone pattern: Alternate the direction of sandbags in each row.
- Brick wall pattern: Overlap sandbags by a third with each new layer.
The orientation of the sandbag’s open end also matters—toward the inside for a single layer; facing inward from both sides for double layers to prevent them from opening under pressure.
Q6: Where should sandbags be placed, and how high should they be stacked?
Sandbags should be strategically placed around entryways and basement window wells. Note that if the door opens outward, the sandbags should be positioned inside; if it opens inward, place them outside to avoid blocking exits.
The stacking height should ideally be 1.5 to 2 times the historical flood level experienced by the property to ensure effective water blocking.
By integrating these scientifically backed methods into typhoon preparations, residents can not only feel more secure but also ensure that their efforts are genuinely effective in protecting against the devastating impacts of typhoons.
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