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2. Nail one end of the strap to the end of the 2x6 brace, filling all the holes with 1-1/2 in. galvanized joist hanger nails. Rest the bottom of the brace on the header and adjust the brace until the top of the hanger is about 3 in. from the top of the post. Nail the hanger onto the post with joist hanger nails and tack the brace to the header with two 3-in. galvanized nails.