STC Levels of concrete block
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STC Levels of concrete block
I need some info on stc levels of concrete block or blocks with and without various filler materials like air, sand, styrofoam etc.
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"Concrete Block STC" into google gave this
http://irc.nrc-cnrc.gc.ca/practice/noi1_E.html
cheers
JOhn
http://irc.nrc-cnrc.gc.ca/practice/noi1_E.html
cheers
JOhn