Setup and space requirements
A typical x-ray baggage scanner will have a footprint about 4 by 4 feet in size. This does not include any type of conveyor belt to automatically move items into and out of the x-ray imaging area. The smallest conveyor belt that would probably be useful for a school application is 8 feet in length, which would add about 2 feet on either side of the detector itself. Conveyors can come in almost any size; typical conveyors for airports are a total of 10-12 feet in length.
Smaller desktop x-ray units are available but are used primarily for screening letters and mailed parcels.
Unlike portal metal detectors used for personnel, x-ray baggage scanners are not sensitive to their surroundings. Virtually no clearance is needed around the equipment except for space for on operator to sit or stand at the controls, which are located to the side of the unit.
A school should have the factory or vendor install, set up, and calibrate the x-ray detector. After installation, moving the equipment to a different onsite location is generally not a problem. While the equipment should not be abused, it is not overly delicate.
Research Report: The Appropriate and Effective Use of Security Technologies in U.S. Schools