Perimeter Security - Fence, Guardhouse, Keyscan (Paperback)

Chapters: Fence, Guardhouse, Keyscan. Source: Wikipedia. Pages: 20. Not illustrated. Free updates online. Purchase includes a free trial membership in the publisher's book club where you can select from more than a million books without charge. Excerpt: A fence is a freestanding structure designed to restrict or prevent movement across a boundary. It is generally distinguished from a wall by the lightness of its construction: a wall is usually restricted to such barriers made from solid brick or concrete, blocking vision as well as passage (though the definitions overlap somewhat). Fences are constructed for several purposes, including: Typical agricultural barbed wire fencing. Split-rail fencing common in timber-rich areas. Chain link fence surrounding a field in Jurong, Singapore. The Borgarvirki with ajoining Murno Gladst fence, Iceland.Various types of fencing include: Alternatives to fencing include a ditch (sometimes filled with water, forming a moat). A balustrade or railing is a kind of fence to prevent people from falling over the edge, for example, on a balcony, stairway (see railing system), roof, bridge, or elsewhere near a body of water, places where people stand or walk and the terrain is dangerously inclined. Typical perimeter fence with barbed wire on top.The following types of areas or facilities often have to be fenced in: A typical urban fence. Decorative palace fence (in St Petersburg)Fences can be the source of bitter arguments between neighbours, and there are often special laws to deal with these problems. Common disagreements include what kind of fence is required, what kind of repairs are needed, and how to share the costs. In some legislatures the standard height of a fence is limited, and to exceed it a special permit is required. Servitudes are legal arrangements of land use arising out of private agreements. Under the feudal system, most land in England was cultivated in common fields, where peasa...More: http: //booksllc.net/?id=4227