Chapter 5 Flashcards
What is the purpose of barriers? (3)
- Restrict or impede access
- Provide continuous protection
- Deter threats
What are 3 things about barriers
- They can be natural or man-made
- They can include animals, humans
- They can include dispensable barriers
What are generally more resistant than to penetration than door, windows or other openings
Walls
What results in placing two or more walls in a series (close proximity)
A longer penetration time than one wall of the same thickness
What is specific about hinges on the exterior side of a door?
They should be non-removable hinges or have the hinge pins welded in place
What dimensions does a window need to be away from the ground or trees to require protection?
If it is below 18 feet from the ground, is less than 14 feet from the trees or larger than 96 square inches
What type of material is not generally recommended for security applications?
Acrylics (Lucite/plexiglas) that are less than 1 inch think and than can be penetrated in less than 10 seconds
What is the purpose of window film?
It strengthens the glazing from breakage, blasts, or ballistic penetration.
How much can window film strengthen glass?
more than 300 times it’s original strength and offer 5 times more heat resistance
What size opening should receive protection measures
Anything greater than 96 inches
What are protection measures for building openings?
steel bars, grills, wire mesh, expanded metal or fencing material
Why is it beneficial to install roof enhancements below the roofline?
It is more cost effective and more effective against penetration
What is a fence or wall designed to do? (3)
- Define an area
- Delay and intruder
- Direct people or vehicles to desired checkpoints/entrances
What is the most commonly used security application?
chain linked fencing
What is the medium security fence height and why?
7 feet. It is the minimum height to deter human penetration