FORCED ENTRY RESISTANT GLAZING
This section provides a process for
analyzing the forced entry attack resistance of glazing systems
to establish minimum requirements. The section provides two
procedures for forced entry attack analysis, the first is for
selection applications and the second is for evaluation
applications. Use the Forced Entry Resistant Glazing Selection
procedure to choose glazing systems for new construction or
retrofitting an existing facility. Use the Forced Entry
Resistant Glazing Evaluation procedure to analyze existing
Levels of Protection to Resist Forced Entry Attack.
For security glazing, there are two levels of protection to
resist a forced entry attack as shown in Table 13: low and
medium. Glazing systems cannot provide high or very high levels
of protection against a forced entry attack. Refer to Table D-30
for design parameters associated with each of the threat severity
levels for forced entry attack.
Low Level of Protection. Eliminates possibility of
quiet cutting or single blow breakage from small tools, rocks, or
bricks (i.e., smash and grab tactic).
Medium Level of Protection. Glazing will provide
protection equivalent to that of wall cross-section. The analyst
is referred to MIL-HDBK-1013/1A for wall design procedures that
resist forced entry attack.
Forced Entry Resistant Glazing Selection Procedure.
This procedure aids an analyst by providing structures that
establish minimum glazing specifications for forced entry attack
severity levels. Figure 26 presents a process chart and Figure
27 provides a description of the procedure.
Protective Measures to Resist Forced Entry Attack
Level of Protection
1. Provide 1/4-inch (6-mm)
1. Provide glazing system to