Slide 15 of 67
Notes:
Combining Different Material Strengths
- What happens when two or more materials are used on the same shear wall?
- Example.
- Assume a wall was sheathed inside with gypsum wallboard and outside with portland cement plaster, what would be the strength of the wall?
- According to older editions of the building code, the allowable shear strength would be the combined strength of the two materials.
- What is the true strength of the combined material? Different sheathing materials do not combine strengths. This is true on the same wall and it is also true for different walls of the same level of the building.
- Buildings designed with gypsum wallboard or portland cement plaster in combination with structural wood panels will have the same problem
