BLAST RESISTANT STANDARDS

The graph and table below show the GSA/ISC performance conditions for blast resistant products window system response.

Here's an alt tag for the image: `Pressure-duration impulse graph`
Air blast impact zones diagram.

Impulse = 1/2 x Pressure(psi) x Duration(msec)

Notes:

  • Be sure to specify pressure and impulse when ordering a blast-resistant product.
  • Ballistic and forced-entry protection can also be specified and achieved in a blast-resistant product.
  • U.S. Bulletproofing products meet and/or exceed UL 752 Ballistic Standards, GSA Blast, and DOD Forced Protection/Anti-Terrorism Criteria. Test reports are available upon request.
1 Safe None Glazing does not break. No visible damage to glazing or frame.
2 Very High None Glazing cracks but is retained by the frame. Dusting or very small fragments near sill or on floor acceptable.
3a High Very Low Glazing cracks. Fragments enter space and land on floor no further than 3.3 ft. from the window.
3b High Low Glazing cracks. Fragments enter space and land on floor no further than 10 ft. from the window.
4 Medium Medium Glazing cracks. Fragments enter space and land on the floor and impact a vertical witness panel at a distance of no more than 10 ft. from the window at a height no greater than 2 ft. above the floor.
5 Low High Glazing cracks and window system fails catastrophically. Fragments enter Low High space impacting a vertical witness panel at a distance of no more than 10 ft. from the window at a height greater than 2 ft. above the floor.