Pemko STC411 Acoustic Automati...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$162.58
$88.46
Pemko STC411 Automatic Door Bottom cross-section diagram showing 9/16 inch width and 1-3/8 inch height dimensions with mounting screws

Pemko STC411 Acoustic Automatic Door Bottom with ANSI S12.60 Compliance

(No reviews yet) Write a Review

Model: STC411APK26

In Stock (leaves warehouse same day if ordered before 3pm ET)

$162.58
$88.46
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

Pemko STC411 Acoustic Automatic Door Bottom — ANSI S12.60 Compliant

Professional Acoustic Sealing for Educational and Commercial Applications

The Pemko STC411 Acoustic Automatic Door Bottom delivers certified sound control performance with ANSI Standard S12.60-2002 compliance — the benchmark specification for acoustical performance in schools and other critical listening environments. The aluminum housing carries a movable drop-bar seal (H: 1-3/8", W: 9/16") and is available in lengths from 26" to 48". Independent testing confirms "sealed-in-place" type performance. BHMA certified, UL10C fire rated (positive pressure), cUL Listed 4L10, and air infiltration tested.

Features & Benefits

  • ANSI S12.60-2002 Compliance: Meets Acoustical Performance Criteria, Design Requirements, and Guidelines for Schools — supports LEED IEQ School Specific Credits.
  • Sealed-in-Place Performance: Independent testing confirms acoustic sealing performance comparable to permanent installations for demanding sound control applications.
  • Reversible Hand Design: No disassembly required to change handing — simply flip the unit to reverse the hand, speeding installation.
  • Hinge-Side First Actuation: The drop-bar seal always actuates on the hinge side first, preventing skidding along the floor and eliminating door hang-up.
  • Smooth Positive Seal Mechanism: Drop-bar seal is actuated by a plunger that contacts the jamb as the door closes, forcing the seal down against the floor or threshold.
  • Complete Installation Kit: End plate kits included. Replacement part K435 available. For doors narrower than 1-3/4", specify K411 end plate kit.
  • 5-Year Warranty: Manufacturer warranty provides long-term protection for commercial installations.

Technical Specifications

  • ANSI/BHMA: BHMA Certified, Fire Rated UL10C Positive Pressure, cUL Listed 4L10, Air Infiltration Tested
  • Acoustic Standard: ANSI S12.60-2002
  • Material: Aluminum
  • Insert Type: Black PemkoPrene Insert
  • Dimensions: H: 1-3/8", W: 9/16"
  • Available Lengths: 26", 28", 30", 32", 34", 36", 40", 42", 48"
  • Use: Commercial
  • Warranty: 5 Year

Typical Applications

  • Educational Facilities Requiring ANSI S12.60 Compliance
  • Commercial Office Buildings with Acoustic Requirements
  • Healthcare Institutions with Sound Control Needs
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings
  • LEED-Certified Construction Projects
  • Fire-Rated Door Assemblies

Pemko STC411 Acoustic Automatic Door Bottoms combine aluminum construction, BHMA certification, and ANSI S12.60-2002 compliance in a reversible, easy-install package. Multiple UL ratings — including fire-rated UL10C positive pressure — make this a single-spec solution for projects where acoustic performance and fire compliance must coexist.

Product Specs

Subcategory:
Door Bottoms & Door Shoes
Insert Type:
Black PemkoPrene Insert
Warranty:
5 Year
Product Group:
Door Trim and Accessories
Product Subgroup:
Door Bottom Sweeps and Door Shoes
Product Type:
Automatic Door Bottoms
ANSI/BHMA:
BHMA Certified, Fire Rated UL10C Positive Pressure, cUL Listed 4L10, Air Infiltration Tested
Commercial/Residential:
Commercial
Product Model:
STC411
Product Length:
26", 28", 30", 32", 34", 36", 40", 42" or 48"
Product Dimension:
H: 1-3/8", W: 9/16"
Product Category:
Door Trim and Accessories
Product Substrate:
Aluminum
Department:
Door Hardware

Pemko STC411APK26 – Frequently Asked Questions

1) What is the Pemko STC411 automatic door bottom used for?
The STC411 is an automatic door bottom that seals the gap under doors when closed. It drops down to create an acoustic and light seal, then retracts when the door opens.
2) What door types and thicknesses does this work with?
The STC411 fits standard commercial doors. Verify door thickness and clearance requirements with manufacturer specifications before ordering.
3) Is this door bottom handed or reversible?
Most Pemko automatic door bottoms are field reversible. Check the specific model documentation to confirm handing options and adjustment procedures.
4) What finishes are available for the STC411?
Pemko door bottoms typically come in mill aluminum and anodized finishes. Contact us to confirm available finish options for this specific model.
5) What is the fire rating and grade of this door bottom?
Check manufacturer specifications for fire rating and heavy duty grade classifications. Many Pemko door bottoms are suitable for commercial grade applications.
6) Does this meet building code requirements for sound transmission?
The STC411 is designed for sound control applications. Verify STC ratings and code compliance with local building officials and project specifications.
7) What replacement parts are available for this model?
Common replacement parts include rubber seals, springs, and adjustment mechanisms. Browse our Pemko products section for compatible parts.
8) How is the STC411 installed on the door?
Installation requires routing a channel in the door bottom and securing with screws. Follow manufacturer templates exactly for proper fit and operation.
9) How do you adjust the seal drop and retraction?
Adjustment screws control seal drop distance and spring tension. Make small adjustments and test operation. Over-adjustment can cause binding or poor sealing.
10) What other Pemko door bottom models are similar?
Other STC series models offer different lengths and features. Check our door hardware section for comparable automatic door bottoms.
11) Can this work with uneven floor conditions?
Minor floor variations can be accommodated through adjustment. Significant unevenness may require floor preparation or alternative sealing solutions.
12) What are the key measurements needed for ordering?
Measure door width, thickness, and gap under door when closed. Verify available space for the mechanism housing within the door bottom rail.
How fast can I get the Pemko STC411APK26 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Pemko STC411APK26 come with a warranty?
Absolutely. The Pemko STC411APK26 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Pemko STC411APK26?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Pemko STC411APK26 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
!