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STC 35

STC 41 VISION

STC 41
 
STC 47

STC 49 PAIR
 
STC 51

PROJECT LISTINGS



 

Sound Rated Hollow Metal
Door Assembly - STC Rating 51
 

  • Standard mortised hinges

  • U.L. rated up to 3 hour/A label

  • On-site engineering services

  • Tested as an operable, standard 1 3/4" door in accordance with ASTM E90-90

  • 4 - 6 week delivery

  • Installation coordination available on request

  • ASTM/NVLAP tested

  • Custom lab and field tests available

STC Value

Rating

Description
50 - 60 Excellent Loud sounds heard faintly or not at all.
40 - 50 Very Good Loud speech heard faintly but not understood.
35 - 40 Good Loud speech heard but hardly intelligible.
30 - 35 Fair Loud speech understood fairly well.
25 - 30 Poor Normal speech understood easily and distinctly.
20 - 25 Very Poor Loud speech audible.

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