I've run a few numbers on using larger nails that go through the truss width and both gusset plates (nails in double shear). However, I've had some potential clients ask for trusses with wood gusset plates using 8d and 10d nails. I am curious if anyone has experience using smaller nails but in larger quantities. My concern is with double the nails into the truss member it will be more prone to split. Also nails in double shear are more bang for your buck in my opinion but it seems that some people think its easier to fabricate the truss by nailing off one side and then the other rather than driving a larger spike clean through and then clinching it.
Either method you can use a nail gun to shoot the nails but the clinching is definitely a manual task so I can see the downside to that.
A confused student is a good student.
Nathaniel P. Wilkerson, PE