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CAP = controlled access point, CAZ = controlled access zone, RAZ = restricted access zone
A larger and more complicated site may contain multiple barns, along with equipment and storage buildings. There is a separate RAZ and CAP for each barn. Transition areas within the barn allow personnel to apply appropriate sanitary measures. One CAP provides access to the single CAZ. Parking is established outside the CAZ to reduce unnecessary traffic movements within the CAZ.
A more complex site may contain multiple barns and/or ranges, along with equipment and storage buildings. One RAZ, such as this, is not ideal for disease control; however, if the operation includes common equipment and personnel who are moving unrestricted between buildings, one RAZ, including all buildings and the area inside in which unrestricted movement occurs, may be the only alternative. In this setup, control of disease spread into and out of the complex is less effective than if each barn was a separate RAZ. Further, there is no control of disease spread between the barns. All barns would be of equal biosecurity status (that is, as if they were all one barn). Entry into the RAZ is controlled by a CAP. This could be an anteroom set up for personnel with cleaning and disinfecting capabilities for larger equipment. One CAP provides access to the single CAZ. Parking is established outside the CAZ to reduce unnecessary traffic movements within the CAZ.