Example Number 4: System Analysis. This example
illustrates how an analyst would select a glazing system after
determining the design basis threat in Example No. 2 and levels
of protection in Example No. 3. The example begins with
structure number 1 of Figure 5. Table E-8 through Table E-16
present the analyst's actions for this example.
Background Information. Communications equipment is
the asset to be protected. The following information applies to
Windows. The communications equipment is housed in a
room with two windows. Center-line of the windows is about 5
feet (1.5 m) above the ground. Each window is roughly 2 feet
(0.61 m) high by 3 feet (0.91 m) wide. Glazing height and width
are 22 inches (0.56 m) and 34 inches (0.86) from gasket center-
line to gasket center-line, respectively.
Exterior Attack Tactic.
An aggressor can throw a bomb
directly at the communications equipment room windows from
outside the fence line. Standoff distance for an attack is 60
feet (20 m).
Blast Design. Table E-6 presents the results of a blast
design for window frame, anchorage, and wall.