Rapid Floor Underlayment Sound Ratings

Rapid Floor® Systems
UNDERLAYMENT SOUND RATINGS — TESTED ASSEMBLIES

Sound Ratings - Tested Assemblies	Underlayment	Insulation	Ceiling Susp. on Chan.	Ceiling Drywall	Floor Coverings Floor erings	Ratings* Ratings*	Test Numbers
Truss Plate Institute with 3/4" (19 mm) T&G plywood subfloor	3/4" (19 mm) 3/4" (19 mm) 3/4" (19 mm)	Yes (blown-in) Yes (blown-in) Yes (blown-in)	Yes Yes Yes	5/8" (16 mm) 5/8" (16 mm) 5/8" (16 mm)	Vinyl Vinyl Ceramic	57-FSTC 50-FIIC 46-FIIC	98.67280.10 98.67280.1 98.67280.12
Metal Joist 9 1/2" (247 mm) w/ 3/4" (19mm) T&G OSB subfloor	3/4" (19 mm) 3/4" (19 mm) 3/4" (19 mm)	3 1/2" (89 mm) 3 1/2" (89 mm) 3 1/2" (89 mm)	Yes Yes Yes	5/8" (16 mm) 5/8" (16 mm) 5/8" (16 mm)	Vinyl Carpet and Pad Carpet and Pad	49-FIIC 51-FSTC 73-FIIC	94-2278 94-2168.1 94-2168.2
SpaceJoist® Metal Web Truss 16" deep w/ 3/4" (19 mm) T&G OSB subfloor	3/4" (19 mm) 3/4" (19 mm) 3/4" (19 mm) 3/4" (19 mm)	3 1/2" (89 mm) 3 1/2" (89 mm) 3 1/2" (89 mm) 3 1/2" (89 mm)	Yes Yes Yes Yes	5/8" (16 mm) 5/8" (16 mm) 5/8" (16 mm) 5/8" (16 mm)	Vinyl Mannington 3/8" laminate floating floor over Quietwalk Carpet and Pad Carpet & Tile	51-FIIC 54-FIIC 70-FIIC 52-FSTC	51210-4 51210-5 51210-3 51210-1
Wood Joist w/ 5/8" (16 mm) plywood subfloor	3/4" (19 mm) 3/4" (19 mm) 3/4" (19 mm) 3/4" (19 mm) 3/4" (19 mm) 3/4" (19 mm) 3/4" (19 mm) 3/4" (19 mm) 3/4" (19 mm)	Blown-in Blown-in Blown-in Blown-in Blown-in Blown-in Blown-in Blown-in Blown-in	Yes Yes Yes Yes Yes Yes Yes Yes Yes	5/8" (16 mm) 5/8" (16 mm) 5/8" (16 mm) 5/8" (16 mm) 5/8" (16 mm) 5/8" (16 mm) 5/8" (16 mm) 5/8" (16 mm) 5/8" (16 mm)	Hi-Grade Residential Carpet & Cushion Lo-Grade Residential Carpet & Cushion Hi-Grade Commercial Carpet & Cushion Med-Grade Commercial Carpet & Cushion Bare Floors, No Carpet or Cushion Sheet Vinyl Vinyl Tile Wood Parquet Floor Ceramic Tile	53-STC/ 78-IIC 52-STC/ 81-IIC 52-STC/ 71-IIC 50-STC/ 70-IIC 50-STC 50-STC 52-STC 51-STC 51-STC
Wood Joist w/ 5/8" (16 mm) plywood subfloor	3/4" (19 mm) 3/4" (19 mm) 3/4" (19 mm) 3/4" (19 mm)	3" (76mm) Fiberglass 3" (76mm) Fiberglass 3" (76mm) Fiberglass 3" (76mm) Fiberglass	Yes Yes Yes Yes	5/8" (16 mm) 5/8" (16 mm) 5/8" (16 mm) 5/8" (16 mm)	Lo-Grade Residential Carpet & Cushion Hi-Grade Commercial Carpet & Cushion Med-Grade Commercial Carpet & Cushion Bare Floors, No Carpet or Cushion	54-STC/ 76-IIC 54-STC/ 80-IIC 54-STC/ 82-IIC 53-STC