STC Doors

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Metal Sound Control Door Assemblies
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Sound Transmission Control (STC) Doors


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  • Fire rated up to STC 53 for singles and STC 48 for pairs of doors
  • Door Components’ patented STC core  design
  • Up to and including STC 48 for pairs of doors; includes factory-supplied astragal
  • All STC ratings available for single doors up to and including STC 54
  • 1 3/4” doors (light weight for STC doors)
  • Any manufacturer’s hinge locations
  • Continuously welded vertical edges (seamless) standard
  • Uses 4 1/2” 180 heavyweight hinge (not supplied)
  • No cam lift hinge required
  • All required seals and a threshold are included
  • Galvannealed steel standard
  • Single door vision lites available up to and including STC 48
  • Interior and exterior use
  • Rust inhibitive prime coat ANSI/SDI A250.10
  • Tested in accordance with ASTM E90-09
  • Frame must be grout filled (by others)
  • STC frames available



  • Up to 90 minute fire rating (Except STC54)
  •  Integral lite option
  • Flush top cap
  • Any manufacturer’s Deadlock prep, Panic prep, and Mortise sectional trim
  • Astragal (for pairs)


  • 3/16” for hinges
  • 12-gauge for locks standard
  • 14-gauge for closers standard
  • Heavier gauge reinforcements available

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