UFC 4-010-01
8 October 2003
II where there is a controlled perimeter and explosive weight I for an uncontrolled
perimeter. Explosive weights I and II are identified in Table B-1.
B-2.3.3
Superstructure. The progressive collapse provisions of Standard 6,
including the provision for loss of lateral support for vertical load carrying elements, will
include all structural elements within and adjacent to the overhang.
B-2.4
Standard 9. Exterior Masonry Walls. Unreinforced masonry walls are
prohibited for the exterior walls of new buildings. A minimum of 0.05 percent vertical
reinforcement with a maximum spacing of 1200 mm (48 in) will be provided. For existing
buildings, implement mitigating measures to provide an equivalent level of protection.
B-3
ARCHITECTURAL DESIGN. Even where the minimum standoff
distances are achieved, many aspects of building layout and other architectural design
issues must be incorporated to improve overall protection of personnel inside buildings.
B-3.1
Standard 10. Windows, Skylights, and Glazed Doors. To minimize
hazards from flying glass fragments, apply the provisions for glazing and window,
skylight, and glazed door frames below for all new and existing inhabited buildings
covered by these standards. Glazing and frames must work as a system to ensure that
their hazard mitigation is effective. These provisions apply even if the minimum standoff
distances are met. The specific requirements below, provided conventional standoff
distances are met, will result in windows, skylights, and glazed doors that comply with
this standard for windows provided their visual glazing openings do not exceed 3 square
meters (32 square feet). For larger windows, refer to the DoD Security Engineering
Design Manual.
B-3.1.1
Glazing. Use a minimum of 6-mm (1/4-in) nominal laminated glass for all
exterior windows, skylights, and glazed doors. The 6-mm (1/4-in) laminated glass
consists of two nominal 3-mm (1/8-in) glass panes bonded together with a minimum of a
0.75-mm (0.030-inch) polyvinyl-butyral (PVB) interlayer. For insulating glass units, use
6 mm (1/4 inch) laminated glass inner pane as a minimum. For glazing alternatives to
the 6-mm (1/4-in) laminated glass that provide equivalent levels of protection, refer to
the DoD Security Engineering Design Manual.
B-3.1.2
Window, Skylight, and Glazed Door Frames. Provide window and
skylight frames, mullions, and sashes and door rails and stiles of aluminum or steel as
detailed below. Alternatively, use frames that provide performance to the required level
of protection (see Tables 2.1 and 2.2). For existing buildings, complying with this
standard may require replacement or significant modification of window frames,
anchorages, and supporting elements.
B-3.1.2.1
Frame Member Design. Steel members may be designed using ultimate
yield stresses and aluminum members may be designed based on a 0.2% offset yield
strength. Equivalent static design loads for the window, skylight, and door members
shall be 7 kilopascals (1 lb per square in) applied to the surface of the glazing and frame
Deformations shall not exceed 1/60 of the unsupported member lengths.
B-9
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