UFC 4-010-01
8 October 2003
Table 2-1 Levels of Protection New and Existing Buildings
Level of
Potential Structural
Potential Door and
Potential Injury
Protection
Damage
Glazing
Hazards
Doors and windows fail
Majority of personnel
Severely damaged.
Below AT
and result in lethal
suffer fatalities.
Frame collapse/massive
standards
hazards
destruction. Little left
standing.
Majority of personnel
Glazing will break and is
Heavily damaged - onset
Very Low
suffer serious injuries.
likely to be propelled into
of structural collapse:
There are likely to be a
the building, resulting in
Major deformation of
limited number (10% to
serious glazing fragment
primary and secondary
25%) of fatalities.
injuries, but fragments will
structural members, but
be reduced. Doors may
progressive collapse is
be propelled into rooms,
unlikely. Collapse of
presenting serious
non-structural elements.
hazards.
Majority of personnel
Glazing will break, but fall
Damaged
Low
suffer significant injuries.
within 1 meter of the wall
unrepairable.
There may be a few
or otherwise not present a
Major deformation of
(<10%) fatalities.
significant fragment
non-structural elements
hazard. Doors may fail,
and secondary structural
but they will rebound out
members and minor
of their frames, presenting
deformation of primary
minimal hazards.
structural members, but
progressive collapse is
unlikely.
Glazing will break, but will
Some minor injuries, but
Damaged repairable.
Medium
remain in the window
fatalities are unlikely.
Minor deformations of
frame. Doors will stay in
non-structural elements
frames, but will not be
and secondary structural
reusable.
members and no
permanent deformation
in primary structural
members.
Glazing will not break.
Only superficial injuries
Superficially damaged.
High
Doors will be reusable.
are likely.
No permanent
deformation of primary
and secondary structural
members or non-
structural elements.
2-6
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