Two L3x3x1/4 structural angles span diagonally between a perimeter wide-flange beam and an interior wide-flange beam, welded with three-sixteenths inch fillet welds to three-eighths inch typical gusset plates. Each end of the double-angle brace is secured to its respective gusset plate using two three-quarter-inch diameter A325N bolts. The intermediate length of the double angles features three-quarter-inch diameter stitch bolts equally spaced at four feet six inches on center maximum with a two-inch minimum. Section A-A details a three-eighths-inch square plate connected to the double angles with a three-quarter-inch diameter A325 SC bolt.
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