Forcible Entry Demonstrations
Air-blast Resistant Window Systems
Break, vent, and clear times for the laminated single-paned units were comparable to the
daylight film configurations, but were less than for the attached-film configurations.
Heavier tools tended to improve the vent and clear times.
As with the tempered glass with daylight film, no glass shards remained in the frame after
Figure 8: Test 26
Paned Tempered Glass
Laminated Insulating Glass Units
First break for the laminated annealed insulating glass units was approximately twice that
of the first break time for the single-paned laminated annealed insulating glass units.
The firefighters found that a good way to gain access through insulting glass units was to
first ensure that the non-laminated annealed panes were fully broken before addressing
the laminated panes. This allowed them to exploit the same flexible-mass effect they had
observed during the single-paned laminated glass demonstrations.
Figure 9: Laminated
Firefighters were unable to break the windows on the second floor using a commonly
employed standard operating procedure, namely, breaking the glass with the tip of a roof
Hinman Consulting Engineers, Inc