Good Blocking (STC 40) – Full Height Walls

CEILING SYSTEM

• Chicago Metallic® suspension systems suspension grid
• Rockfon stone wool ceiling panels – optimized for sound absorption
• Noise control measures for noise flanking paths through lights, grilles, diffusers – not required

WALL ASSEMBLY

• 1/2" gypsum board (type X) – 1 layer each side
• 3-5/8" steel studs (25 gauge) spaced 16" on center
• 1-1/2" thick ROCKWOOL AFB® Semi-Rigid Batt Insulation
• STC 40 (lab test² #TL-93-343)
• Alternative STC 40 wall options

Sources

_{1 For an overview of the sound blocking levels required by the various acoustics standards, guidelines and building rating systems refer to Madaras, G. "A Guide on the Four Categories for Acoustics Criteria in Building Standards and Guidelines." Acoustical Interior Construction, Jul-Sep 2016, pp. 27.
2 The referenced laboratory test(s) are part of an extensive, multi-year, testing program conducted by the National Research Council Canada (NRCC) and published by the Institute for Research in Construction (IRC). For more details, including 1/3 octave band transmission loss data, refer to internal reports IRC-IR-693, October 1995 and IRC-IR-761, March 1998. The research program was partially funded by ROXUL, Inc. ROCKFON and ROCKWOOL are subsidiaries of the ROCKWOOL Group.}