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I'm building an 8' by 13.5' shed with a loft. I posted previously about the floor frame being slightly larger than the planned floor. Below is the intended floor framing, as seen in the plan: dimensioned view of floor framing

Here is the current execution (joists have been installed as above but are omitted from the diagram; red area is where subfloor and walls actually sit): view from above of floor superimposed on frame, excluding joists

Consequently, the outer face of each side wall (2x4 thickness) is inset about 3" from the outer edge of the beam below it (three sistered 2x6s). Here is a cross-section of a side wall:

components of wall and floor framing

I have nailed the bottom plate to the 2x6 below, but could not overlap the sheathing past the bottom plate and nail it to the rim board (like I did on the rear wall) because of how the rim board juts out. I plan on adding flashing to avoid moisture seepage into the plywood.

The current connection between walls and floor is rather dinky and I would like to ensure that shear bracing is adequate, especially since I live in a relatively earthquake-prone location. Can I use another method, e.g. using steel strapping to attach the wall framing to the rim board at studs? If so, can I bend the strapping so that it conforms to the outer surface of the rim board and wall?

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    Maybe @leesam or someone with an engineering inclination can weigh in, but that's a tiny structure. My gut tells me that just nailing off the perimeter/field thoroughly will give you all the shear you need. If you didn't have windows, you could also let in some bracing, but I sincerely believe that's overkill. – Aloysius Defenestrate Jan 11 at 0:23
  • I'm baffled why you didn't move the walls out to be flush with the outside of the rim joists and grab the extra 6" of interior floor space, but I guess it's too late for that. – FreeMan Jan 11 at 16:32
  • I'm at the upper limit of interior space for an auxiliary building not requiring a permit in my area. Also, my lumber is sized for an 8' width. – fisherpeak Jan 11 at 19:44

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