A flexible connection between two duct sections spans a nominal ten inches. A flexible material as specified bridges the gap and overlaps each duct by one-half inch. The flexible material is secured to each duct using three-eighths-inch hex head number four sheet metal screws spaced at twelve inches on center.
AS SPECIFIED MATERIAL FLEXIBLE 1/2" (15 MM) 10" NOMINAL 1/2" (15 MM) 3/8" HEX HEAD #4 SHEET METAL SCREWS ON 12" O.C. DUCT DUCT
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