W. Va. Code § 17C-17-3: Projecting loads on passenger vehicles.

(a) No passenger-type vehicle shall be operated on any highway with any load carried thereon extending beyond the line of the fenders of the left side of such vehicle nor extending more than six inches beyond the line of the fenders on the right side thereof.

(b) A motor home, travel trailer or truck camper may exceed the maximum width prescribed section two of this article, if the excess width is attributable to an appurtenance that does not exceed more than six inches beyond the body of the vehicle.