A boom arm extending from a chassis of an agricultural sprayer includes a plurality of chords extending outward from the sprayer and a plurality of cross-sectional frame members connecting the chords to provide structural integrity. The cross-sectional frame members include brace-receiving portions having slots formed. The boom arm has a plurality of tee-shaped brace members, each having a top flange with a stem extending therefrom. The stem is received in a slot in the brace-receiving portion of adjacent cross-section frame members. Sides of the stem and the underside of the top flange are adhesively bonded to facing surfaces of the brace-receiving portions. Each cross-sectional frame member is configured to receive an extension member that extends between the cross-sectional member and a connector mounted on the first chord. The length of the extension member is determined by the position of the cross-sectional frame member on the tapered boom arm.
