I know i'll be in the same place as that ill fated sunday morning on the beach in my friend's mom's Hillman minx, but here goes . . . .
most of the construction is built depending on the shear of your fasteners ( https://en.wikipedia.org/wiki/Shear_force ). which in some instances look like finish nails from a pin nailer. if you could build under compression (sides rest on top of horizontal components) there will be more rigidity in the structure.