On Jan 1, 5:40*am, Mikepier wrote:
My choices of fasteners would be.
1) Senco M2 style staples; 2" o/c all directions, both sisters.
2) .148" dia plywood shorts; 3" o/c
3) Simpson SDS 1/4; 4" o/c

What is number 2?

"Plywood shorts"

They are short nails designed for attaching plywood (normally 3/8"
thru 1/2" thickness) to framing.

The theory being, no need to have a full length nail to attach
plywood.
They are really for shear walls but they will work even better in a
static loading situation like this repair.
The nails are just needed to transfer shear between the sisters and
the damaged joist so no need to go crazy on the length.

The shorts are less likely to split the receiving member.

cheers
Bob