A two-piece twenty-gauge sheet metal collar with hemmed edges surrounds the fire sprinkler riser where it penetrates a concrete slab. Fasteners secure the collar halves together while a continuous sealant bead seals the joint against the concrete floor. A bead of sealant over backer rod fills the gap between the flange and the collar at the upper connection. The painted finish matches the surrounding stairway walls and pipes, with dimensions verified in the field as indicated.
V.I.F. V.I.F. FIRE SPRINKLER RISER; REFER TO FIRE SPRINKLER SHOP DRAWINGS FOR ADDITIONAL INFORMATION 2-PIECE 20 GAUGE SHEET METAL COLLAR WITH HEMMED EDGES PAINTED TO MATCH STAIRWAY WALLS/PIPES FASTENERS BEAD OF SEALANT OVER BACKER ROD BETWEEN FLANGE AND COLLAR FIRE SPRINKLER RISER; REFER TO FIRE SPRINKLER SHOP DRAWINGS FOR ADDITIONAL INFORMATION 2-PIECE 20 GAUGE SHEET METAL COLLAR WITH HEMMED EDGES PAINTED TO MATCH STAIRWAY WALLS/PIPES FASTENERS CONTINUOUS SEALANT BEAD BETWEEN COLLAR AND CONCRETE
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