I need to apply an image texture of an Armco barrier (guardrail) to a very long, flat-plane object in blender model. I don't know how to unwrap such a long object on to an image texture. The image texture is perhaps 5 feet but the Armco is, e.g., 500 feet. I believe there is a way to have a texture image repeat along the object but I can't figure out how to execute this. I only understand the very basics of UV unwrap, materials and textures so detailed explanation would be most appreciated Thank you.