3.2. Loading Cases

Try these first

1. 1.

   Define imposed load.

   Hint

   What are the normal loads that affect roofs?

2. 2.

   What is the maximum imposed load for flat roofs according to IS 875?

   Hint

   Think about what loads a flat roof needs to support.

3. 3.

   What is the typical imposed load range for flat roofs?

   • 0.75 - 1.5 kN/m²
   • 1.5 - 3.0 kN/m²
   • 3.1 - 5.0 kN/m²

   Hint

   Consider what heavy loads flat roofs must support.

4. 4.

   True or False: Wind loads affect only the windward side of the roof.

   • True
   • False

   Hint

   Think about how wind behaves around objects.

5. 5.

   Calculate the net wind load on a sloping roof given specific roof dimensions and wind speed.

   Hint

   Use the wind speed to find the pressure first.

6. 6.

   Analyze a complex roof truss using both the Method of Joints and software. Compare the results.

   Hint

   Double-check your calculations against software input parameters.