Acoustical Door

Model 4812020 Metal Door

Acoustical Rating: STC 48

Single Swinging Flush Metal Door With Push And Pulls (No Latch)

Quick Specs

Maximum Fire Rating:
1.5 hr

Maximum Leaf Size:
48" x 96"

Perimeter Seal:
Single Magnetic Gasket

Door Bottom:
Semi-mortised Automatic

Quick Downloads

Recommended Hardware

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Surface Mounted Closer
ANSI 156.4 Grade 1
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  • LCN 4010, 4020, 4041 Super Smoothie
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  • Sargent 250, 251, 350, 351, 1230, 1231, 1250, 1251

Mortise Exit Device
3-1/4" maximum case width
ANSI 156.3, Grade 1
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  • Sargent 8300
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Rim Exit Device
ANSI 156.3, Grade 1
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  • Sargent 8800
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5" x 4-1/2" Heavy Weight Hinge
ANSI A5111 or A8111
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Mortise Lock
3-1/4" maximum rosette diameter
ANSI A156.13 Series 1000 Grade 1
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  • Best 35H
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Cylindrical Lock
3-3/4" Back-set Required.
ANSI A156.2, Series 4000 Grade 1
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  • Best 94K
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Saddle Threshold
Must have smooth top, no ridges or grooves
Show Suggested Models

  • Reese S105
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Semi-Mortised Door Bottom

A semi-mortised automatic door bottom is always supplied with this assembly. This door bottom allows for a higher undercut. Automatic door bottoms are a good choice when flooring conditions are unknown, as they offer up to a 3/4" undercut.

Isolated Edge Construction
This door uses an Isolated Edge construction, which separates the two outer door skins from each other. A strip of neoprene is installed between the two door skins, reducing the amount of sound transmission through the actual steel faces. The seal is notched between the hinge and lock cutouts and does not interfere with hardware cuts.
Single Magnetic Perimeter Seals

This door is equipped with a single Magnetic door sealing system.  It consists of a single magnetic perimeter seal. Magnetic seals allow the use of a wide range of electrical hardware, such as electric locks and strikes.  Due to their zero preload against the door leaf, the sensitive electronics are not compromised.

UL Fire Ratings
  In addition to acoustical testing, Overly has successfully tested this product to the latest UL fire test standards, including UL 10B (neutral pressure), UL10C/UBC 7-2 (positive pressure).
Transmission Loss in dB/Hertz - 1/3 Octave Bands
100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000
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