Sound Rated Systems

SOUND RATINGS : SHAFTWALL / STAIRWALL

The Shaftwall / Stairwall assemblies and their components mentioned in the PEI AER-12061 report have been tested in accordance with ASTM E90 (90) and ASTM E413 (87). The shaftwall assemblies were evaluated for sound transmission loss values. The values are only valid if the construction of the assemblies follow the construction as noted in the test reports. When the assemblies are installed in the same manner as noted in the test reports the assembly will have a minimum STC (Sound Transmission Class) rating of 50.
 
 
STC Rating Test Number Wall Detail Description
38

RAL-TL92-40

(Shaftwall #1)

C-T studs 24" o.c. in J-Track. Friction fitted 1" shaftliner panels into "T" section. Base layer of 1/2" gypsum wallboard attached horizontally to "C" section with 1" screws spaced 24" o.c. and 3" from top and bottom tracks. Face layer attached vertically with 1-5/8" screws spaced 12" o.c. and 6" from top and bottom tracks. Face layers are finished with paper tape and joint compound.
44

RAL-TL92-41

(Shaftwall #2)

 
Same as Shaftwall #1 with 3 pcf mineral wool insulation cavity.
39

RAL-TL92-43

(Stairwall #1)

C-T studs 24" o.c. in J-Track. Friction fitted 1" shaftliner panels into "T" section. A face layer of 1/2" gypsum wallboard applied vertically, attached to each side of C-T stud. Wallboard is attached with 1" screws spaced 12" o.c. and 6" from top and bottom tracks. Face layers are finished with paper tape and joint compound.
43

RAL-TL92-44

(Stairwall #2)

Same as Stairwall #1 with 3 pcf mineral wool insulation in cavity.