Air blower wind speed wind pressure comparative table (organization and structural design reference) wind scale and wind speed wind force list (for designed) wind scale Name Wind name Wind speed Wind speed Wind pressure wo=v2/16 Land ground object sign Sea level condition km/s m/s kg/m2 10N/m2 0 Calm <1 0-0.2 0-0.0025 Static, smoke on straight Static 1 Light breeze 1~5 0.3-1.5 0.0056-0.014 The smoke can express the direction, but the windvane is motionless Microwave 2 Light breeze 6~11 1.6-3.3 0.016-0.68 The person surface feeling has the wind, the leaf fine motion, the windvane rotation Wavelet 3 Breeze 12~19 3.4-5.4 0.72-1.82 The leaf and the micro shaking rest, the flags do not launch Wavelet 4 Gentle breeze 20~28 5.5-7.9 1.89-3.9 Can blow the ground paper and the dust, tree's small branch shaking. Light wave 5 Cool breeze 29~38 8.0-10.7 4-7.16 Has leaf's young tree swing Wave 6 Gale 39~49 10.8-13.8 7.29-11.9 Small branch shaking, electric wire whistling sound Very rough seas 7 Gust of wind 50~61 13.9-17.1 12.08-18.28 The entire tree shaking, walks inconveniently against the wind Very rough sea waves 8 Gale 62~74 17.2-20.7 18.49-26.78 Micro breaks off, the human is really big to the vanguard resistance High sea 9 Strong gale 75~88 20.8-24.4 27.04-37.21 The building has slightly damages, the big branch may break off Raging waves 10 Strong winds 89~102 24.5-28.4 37.52-50.41 May pull up the tree to come, to damage the building Raging waves 11 Storm 103~117 28.5-32.6 50.77-66.42 On land is rare, has, then must have the widespread destruction Raging waves 12 Hurricane >117 32.7- 66.42-85.1 On land is extremely rare, destroys the strength to be enormous Towering waves 13 134-149 37.0-41.4 14 150-166 41.5-46.1 15 167-183 46.2-50.9 16 184-201 51.0-56.0 17 202-220 56.1-61.2