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Wind movement on surfaces


Wind exerts pressure (i.e. positive, negative) on different building surface conditions. This diagram shows positive pressure on the windward vertical and normal to windward roof surfaces. Which condition is indicated?

A. roof slope up to 7:12
B. roof slope greater than 7:12
C. flat roof

AnswerB. roof slope greater than 7:12 (negative pressure or suction is exerted on the leeward side of both < and > 7:12 slopes).
ARE 4.0 exam prep: SPD

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