Protection Levels for New Construction. In the Army Security
Engineering Manual there are three levels of protection to which facilities
can be hardened: a low level in which damage is unreparable; a medium level
in which the damage can be repaired; and a high level in which the facility
suffers only superficial damage.
Protection Levels Existing Structures. The Navy Terrorist Vehicle
Bomb Survivability Manual describes two levels of protection for existing
structures: Rebuild or Repair. These are provided for charge weights from 1
to 4,000 pounds (0.45 to 1,800 kg) and standoff distances from 1 to 1,000
feet (0.3 to 300 m) for 12 different building types intended to be
representative of facilities used by the Armed Services worldwide. Examples
are provided in par. 18.104.22.168.