Who is correct NCARB or the Industry?

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Timothy Brown

December 06, 2024 19:15

NCARB  vs USG

 

vs

 

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  Galchenko12 December 06, 2024 19:32

  "wall type does not require resilient channels"... 

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  Victor Ralph Moreno December 06, 2024 20:05

  It isn't a matter of what industry says, its what is the correct answer from the selection provided

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  mermann December 07, 2024 03:32

  Timothy, if you can find it easily, will you attach any table that is included in the original test item? If not, know that the SAME assembly field tested by the same crew and equipment can vary by several STC points, that some acoustic labs consistently score the same assemblies as having higher STC values (such that manufacturers gravitate to those generous labs when testing their products…I’m looking at you , Riverbank Labs in Illinois), that drywall thickness (thicker and heavier performs much better), stud spacing.(24 inch out-performs 16 inch by a little), stud gauge (25 gauge outperforms 20 gauge by a lot) and the even brand of gypsum board can each make a meaningful difference in STC …so my guess is that “catching” a discrepancy in these types of tables is doesn’t really suggest a conflict any more than “catching” a discrepancy in the sodium content of chicken parmesan subs prepared at two different restaurants would reveal a measurement error. Wishing you luck in your studying.

  Michael Ermann, Amber Book creator

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  saihu2 January 02, 2025 03:03

  This UL assembly attached in your screenshot uses RC -1 channel, which excludes this assembly from the correct answer.

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