Quick Answer
For extreme winter winds, a lean-to shelter with a broad, flat roof and a narrow, angled entrance is an ideal shape, providing protection from wind-driven snow and cold air.
Understanding Wind-Driven Snow
When building a shelter for extreme winter winds, it’s essential to understand the dynamics of wind-driven snow. Wind speed and direction can significantly impact snow drift formation, which can compromise shelter integrity. A broad, flat roof helps to deflect snow and minimize drift accumulation. A slope of 30-40 degrees is ideal for shedding snow and runoff.
Shelter Design Considerations
A lean-to shelter with a narrow, angled entrance is effective in blocking wind-driven snow and cold air. The entrance should be positioned at a 90-degree angle to the prevailing wind direction, minimizing the amount of cold air entering the shelter. A minimum roof height of 6-8 feet (1.8-2.4 meters) is recommended to accommodate a 3-4 person sleeping area. A width of 8-10 feet (2.4-3 meters) is sufficient for a cozy shelter.
Techniques for Building a Lean-To Shelter
Building a lean-to shelter requires sturdy poles and a secure anchoring system. Two or three poles can be used to create the frame, with the longest pole serving as the ridgepole. A minimum of two guy lines or anchor points are necessary to secure the shelter against wind gusts. A snow load of 1-2 pounds per square foot (5-10 kg/m²) is a reasonable estimate for a well-built lean-to shelter.
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