Security glazing, if required, shall meet the requirements
Selected Design Areas. For lobbies and other areas with
of ASTM F1233 or UL 972, Burglary Resistant Glazing
specified threats:
Material.
The designer shall implement architectural or structural
features that deny contact with exposed primary vertical
This glazing should meet the minimum performance
load members in these areas. A minimum standoff of at
specified in Table 8-2. However, special consideration
least 6 inches from these members is required.
should be given to frames and anchorages for ballistic-
Primary vertical load carrying members shall be
resistant windows and security glazing since their inherent
designed to resist the effects of the specified threat
resistance to blast may impart large reaction loads to the
(see Progressive Collapse in this section).
supporting walls.
Loading Docks. The loading dock design should limit
Resistance of Window Assemblies to Forced Entry
damage to adjacent areas and vent explosive force to the
(excluding glazing) ASTM F 588 Grade___ (project-specific
exterior of the building. Significant structural damage to
information to be provided; see above for glazing).
the walls and ceiling of the loading dock is acceptable.
Design for eavesdropping and electronic emanations is
However, the areas adjacent to the loading dock should
beyond the scope of the criteria.
not experience severe structural damage or collapse. The
floor of the loading dock does not need to be designed for
Non-Window Openings. Non-window openings such
blast resistance if the area below is not occupied and
as mechanical vents and exposed plenums should be
contains no critical utilities.
designed to the level of protection required for the exterior
wall. Designs should account for potential in-filling of
Mailrooms and Unscreened Retail Spaces. Mailrooms
blast over-pressures through such openings. The design of
where packages are received and opened for inspection,
structural members and all mechanical system mountings
and unscreened retail spaces (see Architecture and Interior
and attachments should resist these interior fill pressures.
Design, Planning, Retail in the Lobby and Mailroom) shall
be designed to mitigate the effects of a blast on primary
Interior Windows. Interior glazing should be minimized
vertical or lateral bracing members. Where these rooms
where a threat exists. The designer should avoid locating
are located in occupied areas or adjacent to critical
critical functions next to high risk areas with glazing, such
utilities, walls, ceilings, and floors, they should be blast
as lobbies, loading docks, etc.
and fragment resistant. Significant structural damage to
Parking. The following criteria apply to parking inside a
the walls, ceilings, and floors of the mailroom is
facility where the building superstructure is supported by
acceptable. However, the areas adjacent to the mailroom
the parking structure:
should not experience severe damage or collapse.
The designer shall protect primary vertical load carrying
Venting. The designer should consider methods to
members by implementing architectural or structural
facilitate the venting of explosive forces and gases from
features that provide a minimum 6-inch standoff.
the interior spaces to the outside of the structure.
Examples of such methods include the use of blow-out
All columns in the garage area shall be designed for an
panels and window system designs that provide protection
unbraced length equal to two floors, or three floors where
from blast pressure applied to the outside but that readily
there are two levels of parking.
fail and vent if exposed to blast pressure on the inside.
248 F A C I L I T I E S S T A N D A R D S
FOR THE
PUBLIC
BUILDINGS
SERVICE
8.4 New Construction
Revised March 2005 PBS-P100
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