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All the bolt on bits of equipment ... | ||||||||||||||||||||||||||||||
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If the camera is mounted on a remote control pan and tilt head, obviously the increased weight has to be rolled into the equation. One important factor when considering the load, is to allow a reasonable safety margin for units located in vulnerable positions. With increasing height, or near the outside corner of a building, wind loading can become an increasing problem, and in mid winter, this coupled with earlier snowfall, can make the bracket or mountings vulnerable to failure. In general terms, the weight of the load should be multiplied at least 2 - 3x on paper, before selecting an appropriate bracket. If the camera housing is to be located on the corner of a building, there are specific adaptor plates available which spread the load away from the (weaker) edge. Be aware though that many modern building construction methods do not always readily accept twenty kilo loads being hung off them by a few unsupported screws. Whenever a camera is in a vulnerable position, it’s useful to attach a seperately bolted safety lanyard made from steel cable (don’t forget to inspect it regularly). Some specialist roof mounted assemblies are designed to allow cameras to be swung onto and off the roof for installation and maintenance. From experience, Doktor Jon would have to say that too often, CCTV system designers choose to place cameras up with the gods, for no apparently sensible reason; it certainly doesn’t fulfil the needs of the “Cone of Containment”, and the appalling effects on a rapidly ageing CCTV engineers natural hair colour, has to be seen to be believed. In some situations, designers prefer to place a camera assembly on a pole or lattice tower, the latter being particularly popular as some can be ‘wound down’ to facilitate installation and maintenance, without the need for a ‘cherry picker’! Whilst these expensive supports come in all shapes and sizes, again it has to be said that they rarely if ever, fulfil even the basic rules, dictated by the concept of a “Cone of Containment”. | ||||||||||||||||||||||||||||||
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