2.2. Permeability Effect

Try these first

1. 1.

   Define permeability in your own words.

   Hint

   Think about how holes or openings affect air flow.

2. 2.

   Name one factor that affects wind load calculations.

   Hint

   Consider the environmental conditions around the structure.

3. 3.

   What does permeability refer to in roofing systems?

   • A measure of strength
   • Degree of openness
   • A type of load

   Hint

   Think about how air moves through materials.

4. 4.

   True or False: High permeability will reduce internal pressures during strong winds.

   • True
   • False

   Hint

   Consider the cause and effect of air movement.

5. 5.

   A roofing system is designed with 30% permeability. Calculate how this would affect its uplift under a wind speed of 100 km/h, assuming the design codes consider this value critical.

   Hint

   Look for standard equations related to wind uplift and incorporate the permeability factor.

6. 6.

   Propose recommendations for a building project located in a windy area that intends to use a highly permeable roofing material.

   Hint

   Think about both material selection and structural physics.