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Screws In Wood-Framed Shear Walls

Screws In Wood-Framed Shear Walls

Screws In Wood-Framed Shear Walls

Does anyone have any good resources on designing shear walls using wood screws instead of common wire nails for plywood shear walls? The AWC and the APA told me that it was up to a manufacturer to provide testing and results for use in design, but so far I can't find anyone that has completed these tests and published the data to design shear walls with screws.

Simpson has ESR-1472 to allow the replacement of 8d and 10d nails with their WSNTL Wood Screw to get the same values in a horizontal diaphragm, but they have no data/products for use in vertical shear walls.

Any insight is helpful.

RE: Screws In Wood-Framed Shear Walls

Well in Eurocodes we have a simple procedure to calculate lateral capacity of the shear wall. In the US you have 3 methods to design as I know. Anyway, based on Eurocodes it doesn't matter which fastener is used, you just need to use correct capacity of the fastener, edge distances, and if you want to calculate deflection also stiffness of the fastener. Beside this in EC you can use any wood-based board (or gypsum fibreboard), you just need to use appropriate material properties. Probably you have similar in your code.
On a side note, we have no procedure in the code to calculate deflection of shear walls or diaphragms, but that's another story...

RE: Screws In Wood-Framed Shear Walls

That's interesting, I haven't looked into any codes outside the US (and maybe some from Canada, but can't recall).
Do you have a link to these codes so that I can compare with the NDS, etc...?

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