Slide 7 of 67
Notes:
- What types of forces do shear walls resist?
- Shear walls resist two types of forces: shear forces and uplift forces.
- How do horizontal forces enter the building?
- Horizontal forces are transferred from the ground to the structure above it by the connections to the shear wall.
- The strength of the lumber, sheathing and fasteners must resist these shear forces or the wall will tear or “shear” apart as shown in the figure.
- Discussion of figure
- Point out shear in plywood.
- Note that the shear occurs in line with the window opening. This is very common, as it represents a weak area.
- Use a piece of paper to demonstrate shearing from horizontal forces
