Freelance 2015-1

[Brakie]

......Curious as to why you would put a gate at the guard shack as opposed to a moving security fence. You have fence around the perimeter of the facility to keep people off the grounds. There is nothing to keep people off the property at the guard shack entrance. ...

Larry, my thoughts are that the fence and wall around the perimeter keeps strangers of the property but at the gate is the present guards responsible to do so. The toll bar is used to ensure all trucks and cars stop at the gate to report at the guard. Lets assume the plant has an 7/24 operation and a guard is always on duty to save a moving security fence.

Having worked as a security guard (fun job that) that sums it up.The perimeter fence was to keep trespassers out and employees honest..Gate control was our job since we had to log trucks in and out-we checked the seal number against the freight bill seal number and cars (other then company or service cars) was not allowed to enter the dock area.

A moving security fence could be use but,where I worked it was left open and a railroad crossing type gate with a extended arm was used.In place of the cross bucks a signal light was used red when the gate was lowered and green when it was raised.

A word about moving security gates..These gates are chain driven and operates in a jerky manner which means the chain can come off the pulley (cog wheel) and that means the gate is "closed" until maintenance can come and repair it.Modeling wise you would need to add a small cabinet to house the motor and pulley.