UFC 4-010-01
8 October 2003
7-98 and to detailed guidance in the DoD Security Engineering Design Manual. In
addition, the measures below apply to all buildings of three or more stories.
B-2.1.1
Columns and Walls. Design all exterior vertical load-carrying columns
and walls to sustain a loss of lateral support at any of the floor levels by adding one
story height to the nominal unsupported length. While this standard is based on the
assumption of an external threat, where parking beneath buildings is unavoidable, this
provision also applies to internal vertical load carrying columns and walls.
B-2.1.2
Exterior Member Removal. Analyze the structure to ensure it can
withstand removal of one primary exterior vertical or horizontal load-carrying element
(i.e., a column or a beam) without progressive collapse.
B-2.1.3
Floors. Design all floors with improved capacity to withstand load
reversals due to explosive effects by designing them to withstand a net uplift equal to
the dead load plus one-half the live load.
B-2.2
Standard 7. Structural Isolation.
B-2.2.1
Building Additions. Design all additions to existing buildings to be
structurally independent from the adjacent existing building. This will minimize the
possibility that collapse of one part of the building will affect the stability of the
remainder of the building. Alternatively, verify through analysis that collapse of either
the addition or the existing building will not result in collapse of the remainder of the
building.
B-2.2.2
Portions of Buildings. Where there are areas of buildings that do not
meet the criteria for inhabited buildings, design the superstructures of those areas to be
structurally independent from the inhabited area. This will minimize the possibility that
collapse of the uninhabited areas of the building will affect the stability of the
superstructure of the inhabited portion of the building. Alternatively, verify through
analysis that collapse of uninhabited portions of the building will not result in collapse of
any portion of the building covered by this standard or design the uninhabited portion of
the building to meet the requirements for an inhabited building in accordance with these
standards. This standard is not mandatory for existing structures, but it should be
implemented where possible
B-2.3
Standard 8. Building Overhangs. Avoid building overhangs with
inhabited spaces above them where people could gain access to the area underneath
the overhang. Where such overhangs must be used, incorporate the following
measures into the design for new buildings. Incorporate mitigating measures into
existing buildings to achieve an equivalent level of protection.
B-2.3.1
Parking and Roadway Restrictions. Ensure that there are no roadways
or parking areas under overhangs.
B-2.3.2
Floors. Ensure that the floors beneath inhabited areas will not fail from
the detonation underneath the overhang of an explosive equivalent to explosive weight
B-8
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