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Simplify Deck Joist Hanging
The easiest method for running deck joists, especially when you’re working alone, is to attach joist hangers to the ledger board before installing your joists. The trick is to set them at the right height. Take a few minutes to tack together the jig shown here.
You can build the jig with a 5 x 12-in. piece of plywood and a scrap 2×4 cut to the width of your joists. Align the 2×4 to your layout line. Tack the plywood to the top of the ledger, making sure it’s tight. Place the joist hanger around the 2×4 and nail 16d galvanized nails through all the holes into the ledger board.
Cut the 2×4 to the average width of the joists (sometimes the joists will vary in width as much as 1/4 in.). Nail both sides of the hanger flanges to the ledger, leaving one side with about a 1/16-in. gap so a wet joist can slide into place. As you set your joists, chisel out a notch on the bottom if the joist sits too high or shim it if it’s too low.
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Cut Accurate Notches
The most accurate way to cut a board around a deck post is to hold the deck board tight against the post. Transfer the post location to the board with a combination square. Measure and mark the depth of the notch.
When measuring for the depth of the notch, check both sides of the post. Oftentimes there’s a twist in the post and the measurements aren’t equal. Cut out the notch with a jigsaw.
