As a framer, I have found it difficult to keep up with all the changes that happen in the building code. One of the more confusing areas of the code has to do with the proper construction of shear walls. I can't tell you how many fellow carpenters I've talked to who think building a shear wall is simply a matter of adding more nails to the sheathing.
It's hard to find information about shear walls that is concise and easy to understand. The only place I know to get it is in Thor Matteson's book, Wood-Framed Shear Wall Construction — An Illustrated Guide.
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