Sound Transmission Tested Fire-Rated Wood Floor Truss Assemblies: Reference Fire Rating 1 HR 1 HR 1 HR 1 HR 1 HR 1 HR 1 HR 1 HR 1 HR 1 HR Spacing Depth Subfloor 24” oc 24” oc 24” oc 24” oc 24” oc 24” oc 24” oc 24” oc 24” oc 24” oc 12” 12” 12” 12” 12” 12” 12” 16” 16” 14” 23/32” 23/32” 23/32” 23/32” 3/4” 3/4” 3/4” 3/4" 3/4" 3/4” 1 HR 24” oc 18” 3/4” UL L546 1 HR 1 HR 1 HR 1 HR 1 HR 24” oc 24” oc 24” oc 24” oc 24” oc 12” 12” 12” 12” 18” 23/32” 23/32” 23/32” 23/32” 3/4” ? 1 HR 24” oc 18” 3/4” ? ? ? 1 HR 1 HR 1 HR 24” oc 24” oc 24” oc 18” 18” 3/4” 23/32” 23/32” ? ? 1 HR 1 HR 24” oc 24” oc 18” 18” 23/32” 23/32” ? 1 HR 24” oc 18” 23/32” ? 1 HR 24” oc 18” 3/4” ? 1 HR 24” oc 18” 23/32” FC-214 1 HR 1 HR 1 HR 1 HR 1 HR 1 HR 1 HR 24” oc 24” oc 24” oc 24” oc 24” oc 24” oc 24” 12” 12” 12” 12” 12” 12” 10” 19/32” 19/32” 19/32” 19/32” 19/32” 19/32” 5/8” UL L528 UL L529 TSC/FCA 60-02 & 6 UL/Topping Insulation Channel Ceiling Finish Floor Covering STC/FSTC IIC/FIIC Source FC FC FC FC FC FC FC RC RC FC + RSIC-1 FC + RSIC-1 5/8” Type C 5/8” Type C 5/8” Type C 5/8” Type C 5/8” Type C 5/8” Type C 5/8” Type C 5/8” Type C 5/8” Type C 5/8” Type C Carpet Vinyl Carpet Vinyl NONE Carpet & Pad Cushioned vinyl Wood Carpet & Pad Vinyl 48 45 57 57 58 56 37 72 50 52 51 61 74 53 51 72 53 TPI TPI TPI TPI Maxxon Maxxon Maxxon Homasote Homasote Pac Int. 2- 5/8” Type C (per UL with insul) Ceramic Tile 52 50 Pac Int. 5/8” Type C 5/8” Type C 5/8” Type C 5/8” Type C 5/8” Type C Carpet Vinyl Carpet Vinyl NONE 48 45 57 57 59 56 37 72 50 Max 3-1/2” Metal Metal Metal Metal RC TPI TPI TPI TPI Maxxon Max 3-1/2” RC 5/8” Type C Carpet & Pad 83 Maxxon Max 3-1/2” Max 3-1/2” Max 3-1/2” RC RC RC 5/8” Type C 5/8” Type C 5/8” Type C 48 USG USG USG Max 3-1/2” Max 3-1/2” RC RC 5/8” Type C 5/8” Type C 2mm Vinyl NONE 24 oz Carpet & 7/16” pad 2mm vinyl NONE 58 61 48 USG USG Max 3-1/2” RC 5/8” Type C 5/16” tile 61 56 USG Max 3-1/2” RC 5/8” Type C 61 73 USG Max 3-1/2” RC 5/8” Type C 24 oz Carpet & 7/16” pad 2mm Vinyl 61 55 USG Carpet Vinyl Carpet Vinyl Carpet Vinyl NONE 48 47 52 53 56 56 50 54 35 63 43 72 48 RC Dbl 1/2" Type X Dbl 1/2" Type X Dbl 1/2" Type X Dbl 1/2" Type X Dbl 1/2" Type X Dbl 1/2" Type X 5/8” Type C TPI TPI TPI TPI TPI TPI Truswall 1-1/2” Concrete 1-1/2” Concrete 3/4” Gyp-Crete 3/4” Gyp-Crete 3/4” Gyp-Crete 1/2" 440 Sound Barrier 1/2" 440 Sound Barrier 3/4" Maxxon GypCrete 1” Lt Wt gypsum concrete + dampproofing membrane 1-1/2” Concrete 1-1/2” Concrete 1-1/2” Gyp-Crete + ½” Enkasonic 1-1/2” Gyp-Crete + ½” Enkasonic 3/4"” LevelRock 1" LevelRock 1" LevelRock 1" LevelRock 1" LevelRock + 0.4” Enkasonic 9110 1" LevelRock + 0.4” Enkasonic 9110 1" LevelRock + 0.4” Enkasonic 9110 1" LevelRock + 0.4” Enkasonic 9110 3-12/” 3/4" Gypcrete 3/4" Gypcrete 1-1/2” Concrete 1-1/2” Concrete 3.5” 58 58 58 76 1 HR 24” 10” 5/8” 1-1/2” Lt Wt Concrete 3.5” RC 5/8” Type C NONE 57 Truswall TSC/FCA 60-02 & 6 1.5 HR 24” 10” 5/8” 3.5” RC 2- 5/8” Type C NONE 53 Truswall TSC/FCA 90-02 1.5 HR 24” 10” 5/8” 1-1/2” Lt Wt Concrete 3.5” RC 2- 5/8” Type C NONE 57 Truswall TSC/FCA 90-02 ? USG& Maxxon assemblies appear to reference L528 but include insulation. Closer to L546. I have emailed USG, Maxxon, & Pac Int. Only Pac Int. has responded with clarification. Sound Transmission Tested Wood Floor Truss Assemblies: Reference Spacing 24” oc Depth 14” Subfloor 3/4” 24” oc 14” 3/4” 24” oc 14” 3/4” UL/Topping 3/4” Rapid Floor gypsum 3/4” Rapid Floor gypsum 3/4” Rapid Floor gypsum 1” gypsum + 1/4" Acousti-Mat II 1” gypsum + 1/4" Acousti-Mat II 1-1/2” gyp-crete 1-1/2” gyp-crete 1” Lt wt gyp concrete + dampproofing membrane Insulation 3-1/2” Channel RC Ceiling Finish 5/8” gyp Floor Covering NONE STC/FSTC 53 IIC/FIIC 43 Source Maxon 3-1/2” RC 5/8” gyp Sheet vinyl 53 47 Maxon 3-1/2” RC 5/8” gyp 53 87 Maxon Blown-in Yes 5/8” 72 oz carpet & 3/4” pad Vinyl 61 55 Maxon Blown-in Yes 5/8” Ceramic 56 Maxon 60 83 74 Maxon Maxon Pac Int. 24” oc 12” 12” 18” 3/4” 24” oc 18” 3/4” 18” 18” 3/4" 3/4" + 1/4" UL 3/4" 3/4" 1/2" 440 Sound Barrier 1/2" 440 Sound Barrier 1/2" 440 Sound Barrier 5/8” 1-1/2” Lt Wt Concrete 2-1/2” gyp 3/4" 1-1/2” Lt Wt Concrete 1/2" gyp 16” 24” 12” NONE NONE Med wt Carpet & pad 59 3-12/” FC + RSIC-1 5/8” Type C 3-12/” 5/8” Type C Ceramic Tile 60 48 Pac Int. 6-3/4” 6-3/4” FC + RSIC-1 RC RC 5/8” gyp 5/8” gyp Hardwood strip Vinyl 54 53 51 55 Homasote Homasote 6-3/4” RC 5/8” gyp 2-1/2” gyp Carpet & pad 40 oz pad & 44 oz carpet 40 oz pad & 44 oz carpet 3/8” pad & 24 oz carpet 55 47 82 72 Homasote Alpine 46 72 Alpine 52 74 Alpine
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