Explosion Protection

Citadel Storefront solutions with explosion protection offer security against collateral damage inflicted by nearby explosions. Whether you wish to protect your structure against nearby potential threats such as propane storage tanks, rioting mobs, or terrorists, the Citadel solution has you covered.

The internal polycarbonate layer is bonded to the glass with a patented adhesive process to ensure that even if the glazing breaks, every piece of glass—no matter how small—remains locked in place. Testing at Quantico Marine Base in Virginia demonstrated that the 9/16th-inch glazing offered in the Citadel solution stands up to .22 and 9 mm bullets, hand grenades detonated at three feet, and Claymore mines detonated at 75 feet. 

Collateral damage is a major source of injury in explosion attacks. In the 1995 Oklahoma City bombing, the blast destroyed or damaged 324 buildings within a sixteen-block radius, and shattered glass in 258 nearby buildings. The broken glass alone accounted for 5% of the death total and 69% of the injuries outside the Murrah Federal Building; 258 businesses were closed due to windows shattered by the blast. 


  • Also offers forced entry, ballistic, and hurricane protection
  • Impact with 2x4 at 100 mph
  • Explosion stand-off distance of 85 feet
  • Windows and doors made with aluminum frames; available in a variety of finishes
  • Window dimensions can be either horizontal or vertical
  • Doors are compatible with electronic activation devices

Testng and Certifications

Design tested per Florida hurricane guidelines:

  • Static negative pressure: ±300 psf
  • Impacts with 16-lb 2x4 at 100 mph
  • 9,000 cyclic wind pressure testing

Design fully certified to the following standards:

  • Large Missile Impact Test per FBC, TAS 201-94 (ASTM E1886)
  • Cyclic Wind Pressure Loading per FBC, TAS 203-94 (ASTM E1996)
  • Air Infiltration Test, per FBC, TAS 202-94 (ASTM E283-91)
  • Uniform Static Air Pressure Test, Loading per FBC TAS 202-94 (ASTM E330-97)
  • Water Resistance Test, per FBC, TAS 202-94 (ASTM E331-00)
  • Forced Entry Test, per FBC 3693.2 (b) and TAS 202-94