4.1. Axial Forces

Try these first

1. 1.

   What is an imposed load?

   Hint

   Think of activities or conditions that apply pressure on a roof.

2. 2.

   How do wind forces affect roofs?

   Hint

   Consider how wind interacts with different roof shapes.

3. 3.

   What is an imposed load?

   • A fixed load
   • A live load
   • A dead load

   Hint

   Think of what changes with usage.

4. 4.

   True or False: Wind loads only apply vertical pressure to roofs.

   • True
   • False

   Hint

   Consider how wind acts on buildings.

5. 5.

   Design a roof truss for a warehouse considering imposed loads of 2.5 kN/m² and maximum wind uplift of 1.5 kN/m². What materials and safety factors would you select?

   Hint

   Refer to your design codes for specific material strength.

6. 6.

   Given a truss diagram, utilize the Method of Sections to determine the axial forces in two specific members, assuming a uniform load and wind pressure.

   Hint

   Draw free-body diagrams for clarity.