Upgrading Security - The Drinking Water - page 283

barriers , which include jersey barriers, bollards, and security planters, are
not designed to be moved on a regular basis and are typically used in areas
where access is not required or allowed—such as along building perimeters
or in traffic-control areas. Passive security barriers are typically large, heavy
structures that are usually several feet high, and they are designed so even
heavy-duty vehicles cannot go over or though them. They can be placed in
a roadway parallel to the flow of traffic so they direct traffic in a particular
direction (such as to a guardhouse, a gate, or some other sort of checkpoint)
or perpendicular to traffic such that they prevent a vehicle from using a road
or approaching a building or area.
Security for Doorways: Side Hinged Doors
Doorways are the main access points to a facility or to rooms within a build-
ing. They are used on the exterior or in the interior of buildings to provide
privacy and security for the areas behind them. Different types of doorway
security systems may be installed in various doorways depending on the
requirements of the building or room. For example, exterior doorways tend
to have heavier doors to withstand the elements and to provide some security
to the entrance of the building. Interior doorways in office areas may have
lighter doors that may be primarily designed to provide privacy rather than
security; these doors may be made of glass or lightweight wood. Doorways
in industrial areas may have sturdier doors than do other interior doorways
and may be designed to provide protection or security for areas behind the
doorway; for example, fireproof doors may be installed in chemical storage
areas or in other areas where there is a danger of fire. Because they are the
main entries into a facility or a room, doorways are often prime targets for
unauthorized entry into a facility or an asset; therefore, securing doorways
may be a major step in providing security at a facility. A doorway includes
four main components:
• The door , which blocks the entrance. The primary threat to the actual
door is breaking or piercing through it; therefore, the primary secu-
rity features of doors are their strength and resistance to various
physical threats, such as fire or explosions.
• The door frame , which connects the door to the wall. The primary
threat to a door frame is that the door can be pried away from the
frame; therefore, the primary security feature of a door frame is its
resistance to prying.
• The hinges , which connect the door to the door frame. The primary
threat to door hinges is that they can be removed or broken, which
will allow intruders to remove the entire door; therefore, security
hinges are designed to be resistant to breaking. They may also be
designed to minimize the threat of removal from the door.