Nails and Horizontal Shear - Structural engineering general...
3" members are only required if the nailing schedule is 3" o.c. or closer with 10D nails. 8D nails are allowed for 3" nailing into 2X. When the need arises for blocked diaphragms with 2", 2 1/2" or 3" o.c. nailing w/ 10D nails I usually ...