Auralex RC8 Resilient Channel
Auralex RC8 Resilient Channel is a specially-formed, sturdy metal device that, when used to hang drywall (instead of just attaching the drywall directly to the studs or joists), GREATLY improves the sound transmission characteristics of the wall or ceiling system. Auralex RC8 Resilient Channel adds 1/2" of airspace between the studs and drywall and can provide as much as 10 dB of isolation if used properly.
RC8 should be installed horizontally at the bottom and top of your wall, then every 2' or less in between. Up to (2) layers of 5/8" drywall and a layer of SheetBlok may be hung on RC8, even on a ceiling.
Size: 8' long per piece
Quantity: 24 pieces per box (192 linear feet)
- Position RC-8 Resilient Channel at right angles to steel studs, space 24" o.c. and attach to stud flanges with 3/8" Type S pan head screws driven through holes in channel mounting flange.
- Use 1-¼" Type W screws to mount the RC-8 to wood studs/joists/framing.
- Locate channels 2" from floor and within 6" of ceiling.
- Install channels with mounting flange down (see picture below), except at floor to accommodate attachment.
- Splice channel by nesting (not butting) directly over stud. Screw-attach through both flanges.
- A 2-hr. floor/ceiling system with STC/MTC ratings as high as 60/54 is achievable with a ceiling of double-layer 5/8" gypsum board attached to RC-8 channels across joists with 3" Mineral Fiber Insulation in the joist cavities.
- RC Comparison Table (PDF) contains a table of wall constructions with their 1/3 octave band Transmission Loss values, STCs and (when available) MTCs measured in accordance with ASTM E413. The table is intended for use in comparing wall systems before and after the addition of resilient channel. It is not intended to be a complete partition STC/MTC resource. For information on other partitions, please see the source references in the document.
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