"For maximum strength, I used joist hangers to attach the joists. I wasn't familiar with these and couldn't find much info on the proper technique to install them, but with some creative use of scrap 2x4's and clamps I managed to attach them all correctly without any helping hands. They say to use framing nails to attach them but again, for maximum strength, I used four 1.5" deck screws into each header and two 1.5" deck screws into each joist on each one."