cupolas
dayton 3c216 roof curbadustable width
roof curb adjustable width nonventilated outside square 50 to 58 1 2 in curb height 6 3 8 in 18 gauge galvanized steel construction for general ventilation use with dayton ventilators having a square base from 51 1 2 to 57 inches br b features b ul li curb height in . 6 3 8 li li curb square i.d. in . 46 to 54 1 2 li li curb square o.d. in . 50 to 58 1 2 li li damper size in . 50 x 50 sq. li li for use with ul 705 applications li li includes damper tray li li item roof curb li li type adjustable nonventilated li li construction 18 gauge galvanized steel li li use w dayton ventilators having a square base from 51 1 2 to 57 li li mounting flange surface w in . 1 1 8 li li flashing flange in . 1 1 8 li ul