Author Topic: STC of Double-Double Wall?  (Read 3703 times)

rik

  • Guest
STC of Double-Double Wall?
« on: February 06, 2002, 05:34:18 AM »
I'd like to know if anyone has STC figures for
these wall constructions (assuming 5/8" drywall):
1) double-double-wall construction (2x4 framing)
(ie. two double-walls back-to-back or separated by an
insulated airspace (ex. hallway or thin wiring alley).)
2) double staggered-stud  (2x6 frame, 2x4 stud)
3) double RC+1 wall (two walls, each separately framed
2x4 with resilient channel supporting 1 layer drywall)
In general, how does an RC+1 wall (framed, with resilient channel supporting 1 layer drywall)
compare to a full double wall (separate frames)?
What about a frame with RC on both sides?
Also how does a double wall with thinner framing (2x3s)
compare with a standard double wall?
Anyone? :)

ps. why ask?  essentially i'd like to know when
diminishing returns kicks in, prompting me to opt
for the thinner construction to save space.
Double-double really implies 3 completely isolated
airspaces -- is that overkill... or is it simply a
few dB more than a standard double-wall??

Mike

  • Guest
Re: STC of Double-Double Wall?
« Reply #1 on: March 07, 2002, 11:53:55 PM »
: I'd like to know if anyone has STC figures for
: these wall constructions (assuming 5/8" drywall):
: 1) double-double-wall construction (2x4 framing)
: (ie. two double-walls back-to-back or separated by an
: insulated airspace (ex. hallway or thin wiring alley).)
: 2) double staggered-stud  (2x6 frame, 2x4 stud)
: 3) double RC+1 wall (two walls, each separately framed
: 2x4 with resilient channel supporting 1 layer drywall)
: In general, how does an RC+1 wall (framed, with resilient channel supporting 1 layer drywall)
: compare to a full double wall (separate frames)?
: What about a frame with RC on both sides?
: Also how does a double wall with thinner framing (2x3s)
: compare with a standard double wall?
: Anyone? :)
:
: ps. why ask?  essentially i'd like to know when
: diminishing returns kicks in, prompting me to opt
: for the thinner construction to save space.
: Double-double really implies 3 completely isolated
: airspaces -- is that overkill... or is it simply a
: few dB more than a standard double-wall??
What is your STC goal?
STC 56
STC 60
STC 62
go to www.pac-intl.com test certifications page.
they have wall assemblies that perform to these numbers in a lab, Field results will be slighly different, but they have a thinner wall then the double wall options.