These details show the connection methods for 1-1/2 inch wide by 16 gauge galvanized sheet metal U-straps supporting HVAC ducts from structural steel beams and concrete metal roof decks. The roof deck connection uses number 10 sheet metal screws securing the formed strap to the deck flute. The steel beam connection utilizes a steel beam clamp secured with a machine bolt, paired with filler plates as required, with a drawing note specifying that the beam clamp is used for hangers only. The lower duct connection secures the U-strap to the duct using three number 10 sheet metal screws on each side and the bottom, supporting a maximum total load of 150 pounds at the U-straps spaced at a maximum of 6 feet 0 inches on center.
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