Sound Transmission

• Apr 14, 2005

• #2

SperlingPE

Structural

Dec 27, 2002

591

US

I was just recently involved in a movie theatre project. Sound transmission between theatres needed to be controlled. The construction detail between theatres was a double metal stud wall with an air space between them. There was also some detailing that had to be done at the roof. The roof deck had to be broken between theatres.

 

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• Apr 14, 2005

• #3

SlideRuleEra

Structural

Jun 2, 2003

5,527

US

The classic "Wood-Frame House Construction" by the US Dept. of Agriculture (Handbook No. 73) has a 6 page chapter on "Sound Insulation". It states that "the resistance of a building element, such as a wall, to the passage of airborne sound is rated by its Sound Transmission Class (STC)". This book is very affordable on Ebay.

http://www.SlideRuleEra.net

 

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• Apr 14, 2005

• #4

amorrison

Mechanical

Dec 21, 2000

605

CA

Try

http://irc.nrc-cnrc.gc.ca/cbd/cbd239e.html

http://www.auditory.org/asamtgs/asa96haw/4pAA/4pAA8.html

http://www.norliteagg.com/maps/sound.htm

http://www.nrc.ca/irc/fulltext/prac/nrcc44483/nrcc44483.pdf

http://www.marshallday.com/downloads/10_Accuracy_

of_prediction_methods_for_sound_transmission_loss.pdf

http://www.cci-industries.com/Pages/Sound.html

Google also for sound transmission cmu

 

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• Apr 15, 2005

• #5

amorrison

Mechanical

Dec 21, 2000

605

CA

See thread384-120945

 

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• Apr 15, 2005

• #6

jike

Structural

Oct 9, 2000

2,160

US

Can you use upset beams to provide a deeper beam without infringing on headroom? In other words, raise the beams up to the top of the slab or even higher. If you raise them above the top of the floor, you may have to cope them at door openings.

 

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• Apr 15, 2005

• Thread starter
• #7

LPPE

Structural

May 16, 2001

578

US

Unfortunately, there is a hallway around the refridge room, making the top flanges a tripping hazard!

I'm using the steel and concrete slab for composite construction, also.

From my research so far, it appears that a stud wall with batt insulation and solid CMU provide about the same STC value.

 

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• Apr 18, 2005

• #8

Brian19

Structural

Apr 18, 2005

3

CA

Hi there,

Yes there are tables in the back of most district codes. I don't have but I can tell you you a bit about STC and code requirements.

The Ontario building code requires an STC of 50 between dwellings and and STC of 55 if the dwelling abuts an elevator shaft or garbage chute.

The american codes should be similar. I know wood stud (double wall) with insulation will meet an STC of 50. You can't use wood stud because you'r ina non-combustible building. I'm sure metal stud/drywall and insulation will get you to 50 or 55.

The concrete block won't be any good without 2 coats of oil paint on each side which makes me think the 12" CMU request is a not a complete idea.

I can't get you the details because I'm out of town for a while.

I suggest you put this back to the architect. Be careful with sound transmission. It often leads to complaints from occupants which can become a major problem or lawsuit later.

 

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