1. Cut the plumb cut at the top of the I-joist. Use a piece
of plywood in the web or a cutting jig for the saw shoe to ride
2. Attach the web stiffeners to each side with three 8d
nails, leaving a 1/4-inch gap at the top. Clinch the nail
points.3. Attach the hanger to the I-joist. First, nail the
sloped seat to the bottom of the rafter. Next, bend the hanger
against the plumb cut and put the rest of the nails into the
web stiffener and bottom flange.