What is the effect of Exposure C on wind pressure?

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Prepare for the IIBEC GCK and Registered Roof Consultant exam. Study with flashcards, multiple-choice questions, and detailed explanations. Enhance your understanding of roofing standards, wind factors, and ASTM fundamentals to excel in your certification journey.

Multiple Choice

What is the effect of Exposure C on wind pressure?

Explanation:
Exposure C describes open, unobstructed terrain. In these conditions the wind isn’t slowed by nearby buildings or other obstacles, so it can accelerate more as it moves across the terrain and up to the structure’s height. That higher wind speed increases the dynamic (velocity) pressure on the surfaces of the building, leading to higher wind pressures overall. So the effect is that wind accelerates, resulting in higher wind pressures.

Exposure C describes open, unobstructed terrain. In these conditions the wind isn’t slowed by nearby buildings or other obstacles, so it can accelerate more as it moves across the terrain and up to the structure’s height. That higher wind speed increases the dynamic (velocity) pressure on the surfaces of the building, leading to higher wind pressures overall. So the effect is that wind accelerates, resulting in higher wind pressures.

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