11 psi incident peak overpressure and 89 psi*msec
Equivalent to 2,200 lbs TNT at 100 feet *
Result: Absolute NO visible Damage
The blast test was performed in a shock tube at Intertek-ATI in York, Pennsylvania. The same specimen was hit a second time with the same blast power and again no damage. The new s3-Wall is the best choice to provide effective shelters for people and equipment.
* Source: FEMA - Explosive Blast Unit VI -page 30
Effect of various long duration blast overpressure and the associated maximum wind speed on various structures and the human body.
| Peak Over Pressure |
Max. Wind Speed |
Effect on Structures |
Effect on Human Body |
| 1 psi | 38 mph |
Window glass shatters |
Light injuries from fragments occur |
| 2 psi | 70 mph |
Moderate damage to houses |
People injured by flying glass and debris |
| 3 psi | 102 mph |
Residential structures collapse |
Serious injuries are common |
| 5 psi | 163 mph |
Most buildings collapse |
Injuries are universal, fatalities are widespread |
| 10 psi | 294 mph |
Reinforced concrete buildings are severely damaged or demolished |
Most people are killed |
Backside of s3-Wall before the blast
Backside of s3-Wall after the blast (hard to believe)
Shock Tube