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industrial door, insulated steel door - Mouse over the colored dots to view the details of the Sound Transmission Control (STC) Door

Sound Transmission Control (STC) Doors


Metal Sound Control Door Assemblies
Sales Handout

Sound Transmission Control (STC) Doors


Color print

B/W print
  • 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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