Search results with tag "Beaufort wind force scale"

WIND GUIDANCE NOTE FOR WORKING AT HEIGHT IN THE ... …

Beaufort scale Wind force Description Specifications mph km/h m/sec 0 Calm Smoke rises vertically < 1 < 1 < 1 1 Light air Direction shown by smoke drift but not by wind or weather vanes 1-3 1-5 1-2 2 Light breeze Wind felt on face, leaves rustle, wind or weather vanes move 4-7 6-11 2-3 3 Gentle breeze Leaves and small twigs in constant

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