Article by Thomas Hytten, CAA Norway Flight OPS inspector, published in the CAA Norway of January 6, 2025: Sikkerhetsbrev fra Luftfartstilsynet ✈ Januar 2025.
Republished with permission.
Preventing hangar collapse
Winter conditions can lead to significant snowfall, often followed by milder weather. This combination increases the risk of snow accumulating on hangar roofs, making them heavy and potentially hazardous. To protect equipment, personnel, and property, it's essential to take proactive measures.
Photo: Flynytt magazine
Check the weather forecasts
Stay informed about local weather conditions. Pay special attention to forecasts predicting heavy snowfall followed by rising temperatures, as this can cause the snow to become denser and place greater stress on the hangar.
Assess the weight of snow
The weight of snow varies depending on its type and moisture content. 60 cm (approximately 24 inches) of wet snow can equate to a load of about 250 kg per square meter (around 51 lbs per square foot). It's crucial to know your roof's load capacity to determine when snow removal is necessary.
Four snow removal tips
- Remove snow symmetrically: Clear snow evenly from both sides of the roof to avoid uneven loading, which can damage the structure.
- Leave a protective snow layer: Avoid removing all the snow down to the roof surface. Leave a layer of 10–20 cm (4–8 inches) to protect the roofing material from damage.
- Avoid piling snow against walls: Do not shovel large amounts of snow against the walls, as the weight can damage load-bearing structures.
- Use appropriate safety equipment: Utilize necessary safety gear, such as fall protection, and ensure the area around the hangar is cordoned off to protect others on the ground.
By following these guidelines, you can reduce the risk of hangar collapse and ensure the safety of both personnel and equipment throughout the winter months.
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