Structural · S-67A2D

Roof Opening Framing Detail with Angle Frame

Materials

Steel

Elements

Roofs Decks Arches Site / Paving Roof / Floor Openings

Connections

Welded Connection Deck Attachment

About this detail

Framing options for roof openings utilize an angle frame composed of an L5x3x1/4 with the long leg vertical, tied into open-web steel joists or beams. The angle frame is secured with quarter-inch fillet welds typically on three sides as indicated, with specific vertical leg trimming at the joist. Additional framing provisions include solid blocking of steel deck flutes beneath mechanical unit curbs using HSS 1 1/2 x 1 1/2 x 3/16 tack welded to the deck. Extra web members are required for openings six feet and larger, while openings less than twelve inches in diameter follow alternative details.

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