Wood collector fastener connection to shear wall

[amengr]

I'm designing a collector strut that transfers the lateral load from a diaphragm into a shear wall and wanted to make sure of the capacity of the nailed connection. I attached a quick calc and sketch of the connection. Basically there is a 2x collector strut with 10d common nails connecting to the sheathing and a block that is behind the sheathing. For this connection would I need to reduce the value of the connection by the minimum penetration factor of penetration/10D at shear plane 1 in the sketch? Or because there is a block behind the sheathing that receives the nail, there are 2 shear planes so would it be more appropriate to use 2* the connection capacity (2*37# = 74#), and then ignore the minimum penetration reduction factor? Thanks!

 

[AaronMcD]

Your 37 lb yield mode has one plastic hinge. If the nail goes into the blocking, it would require 2 plastic hinges plus crushing at more corners. I'd assume the capacity of the nail in the blocking. I'm getting 97 lbs assuming 1.5" side member and 1" main member, neglecting the plywood.
If I use your 0.4375" I get 73 lbs, my spreadsheet doesn't account for minimum penetration. I don't think you can double mode IIIm.

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