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Trench and wall bivouacs.—By shoveling a trench or building walls of snow blocks, using skis or field-cut poles for rafters, and a waterproof sheet or fir boughs for a roof, a satisfactory shelter can be produced. There are many designs, each with its vociferous advocates. Some prefer a lean-to, others a flat roof; some prefer a rectangular shape, others a hallway with alcoves accommodating two skiers each; some prefer complete enclosure, others insist on an opening with a fire in front. Whatever the design or method of construction, these points should be borne in mind: Provide adequate rafter strength to support a snowload should a snowstorm arise during the night. |
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