About Protective Door Industries

Protective Door Industries, or commonly referred to as PDI, is the established leader of steel door systems, window units and armored defensive positions for special purpose applications requiring:

  • Blast Resistance
  • Pressure Resistance
  • Missile and Tornado Resistance
  • High Threat Level Security
  • Bullet and Attack Resistance
  • Airtight Conditions
  • Gastight Conditions
  • Watertight Conditions
  • Sound Control
  • Oversize Industrial Usage
  • and Other Special Purpose Requirements.

Manufactured at our Harvey, Illinois, USA plant under the brand name Sonicbar®, all assemblies are engineered to be as lightweight as possible, solidly constructed, afford maximum durability and sustain a long service life. PDI listens to our clients’ needs and continuously re-evaluates and renovates the product line to fulfill any request and more.

Mid/High Range Blast
Resistant Swing Door

Penetration Door

PDI Model Numbers

PDI’s Sonicbar® pre-engineered and custom door and window models include:

Blast / Pressure / Missile Resistant Door and Window Assemblies
DB-100 Very Low Range Blast Door
DB-100-SS Low Range Stainless Steel Blast Door
DB-100-SL Low Range Blast Sliding Door
DB-200 Low To Mid-Range Blast Door
DB-200-SL Low To Mid-Range Blast Sliding Door
DB-200-VL Low To Mid-Range Blast Vertical Sliding Door
DB-10 Mid-Range Blast Door
DB-X-1 Mid-Range Blast Door
DB-50 High Range Blast Door
DB-X High Range Blast Door
DB-150 Nominally Airtight Door
DA-100 Airtight Door Or Pressure Tight Door
DW Watertight Door
WB-X Blast Resistant Window
Large / Oversize Sound Control Doors and Window Assemblies
DS4-46F 46 STC Acoustical Door With Flush Sill
DS4-48l 48 STC Acoustical Door With Low Sill
DS4-50F 50 STC Acoustical Door With Flush Sill
DS4-50FS 50 STC Acoustical Door With Flush Sill
DS4-52L 52 STC Acoustical Door With Low Sill
DS6-61L 55 To 61 STC Acoustical Door With Low Sill
DS6-63L 55 To 61 STC Acoustical Door With Low Sill
WS Acoustical Window Unit

Engineering Capabilities

Specifications and sample CAD drawings are offered on this web-site by clicking on the Blast / Pressure / Missile Chart or the Acoustical Selector Chart. And, more sample drawings are available by contacting PDI’s technical staff at sales@protectivedoor.com.  PDI also fabricates doors and windows at custom sizes and ratings beyond the basic products listed. An analysis of each system is performed in-house, and if specified, blast analysis calculations or sound certification will be submitted for engineering review.

Specifying PDI

PDI’s products are usually specified under the following CSI MasterFormat™ categories:

Spec Section Category
08 30 00
Special Purpose Doors
08 39 53
Blast, Pressure and
Missile Resistant Doors and Windows
08 39 13
08 39 19
Airtight, Gastight and Watertight Doors
08 34 73
Sound Control Doors (Large, oversize)
08 56 73
Sound Control Windows
(49 STC and higher)
08 11 00
Steel Doors and Frames
(Custom having special properties)
08 34 19
Industrial Doors

Security Vestibule and Door
(Exterior Threat Side)

Ballistic Barriers

Pair of DS4 Sound Control
Swing Doors


Conventional standard size swing door configurations are available as well as oversize units, horizontal sliding and vertical lift.  The door assemblies are normally manually operated but can be ordered with electric or pneumatic power.   Along with a key cylinder, the swing doors can be prepared for card key or push plate access.  PDI will also interface swing door hardware for push and go function or fully automated power operation to comply with ADA or NFPA 101 requirements for operating forces.


PDI offers factory supervision or installation when requested. In addition, PDI maintains an on-site spare / replacement parts inventory of Sonicbar® hardware for quick turnaround on all inquiries.

Let Protective Door Industries continue to earn your business and respect!

DHI Corporate Member

Made in the USA