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Pemko STC411APK Full Mortise Acoustic Automatic Door Bottom, Mill Aluminum Finish

Usually Ships Next Day
Quick Overview
  • Provides excellent performance for acoustic openings
  • Sound and air infiltration tested
  • Fire-rated and smoke tested

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Pemko STC411APK Full Mortise Acoustic Automatic Door Bottom, Mill Aluminum Finish

Smoother action positive seal mechanism. All Pemko automatic door bottoms consist of an aluminum case which surrounds a movable drop-bar seal. The drop-bar seal is actuated by a plunger which contacts the jamb as the door is closing, forcing the drop-bar seal down against the floor / threshold. 

  • The acoustic automatic door bottom provides excellent performance for acoustic openings 
  • Independent testing has shown that the STC Series Automatic Door Bottom has "sealed-in-place" type performance
  • Meets ANSI Standard S12.60-2002, Acoustical Performance Criteria, Design Requirements, and Guidelines for Schools
  • Helps school projects earn LEED IEQ School Specific Credits for Enhanced Acoustical Performance
  • Installation is fast and easy because disassembly is not required to change handing: simply flip the automatic door bottom and you’ve reversed the hand. 
  • End plate kits are included. Replacement part is K435. For doors narrower than 1-3/4", please specify K411 end plate kit. 
  • The drop-bar seal actuation mechanism (all models) causes the drop-bar seal to always actuate on the hinge side first. This feature prevents the seal from skidding along the floor / threshold while the door is being closed. Door hang up will not occur.
  • Pemko automatic door bottoms are provided NET length


Air Infiltration TestedAir Infiltration Tested

Sound Tested - ASTM E90Sound Tested - ASTM E90

BHMA CertifiedBHMA Certified

Smoke Tested - UL1784Smoke Tested - UL1784

Fire Rated - UL10C - Positive PressureFire Rated - UL10C - Positive Pressure

Underwriters Laboratory 4L10Underwriters Laboratory 4L10



More Information

Finish: Mill Finish Aluminum with Black PemkoPrene insert

Material: 6063-T6 Aluminum Alloy and Temper Case with TPE Gasket

Lengths: 36", 42", or 48"

Width: 9/16” (14.3 mm)

Height: 1 3/8” (34.9 mm)

Weight: Estimated per foot: 0.50 lbs

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