This specification deals with rigid poly vinyl-chloride (PVC) exterior profiles used for agricultural, commercial, residential fencing and railing. The material used in these exterior profiles is limited to rigid poly (vinyl chloride) (PVC) compounds in a single homogeneous extrusion or in a coextrusion of two or more PVC compounds in distinct layers. Loadbearing characteristics for fence and railing assemblies are not addressed within this specification (for example, windload, horizontal or vertical guardrail loading). Materials shall be tested and shall conform to requirements for the material properties and physical properties, including dimensional tolerances, extrusion quality, and weatherability. Methods for testing and for identifying exterior profile extrusions, such as impact resistance, warp, dimensional stability, and impact test on weathered specimen that comply with this specification are also provided.