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A rocker panel assembly for attachment to a vehicle, comprising a rocker panel body, a first end feature situated on a first end of the rocker panel body, and a second end feature situated on a second end of the rocker panel body. The rocked panel body has an outside surface generally presented in t

A rocker panel assembly for attachment to a vehicle, comprising a rocker panel body, a first end feature situated on a first end of the rocker panel body, and a second end feature situated on a second end of the rocker panel body. The rocked panel body has an outside surface generally presented in the form of a convex surface, and an inside surface generally presented in the form of a concave surface. The outside surface of the rocker panel body extends outwardly of the vehicle, to present an outboard section having a predetermined profile based on targeted aesthetic/performance characteristics. The inside surface of the rocker panel body has at least one transverse rib positioned therein, the transverse rib being arranged generally perpendicular to the longitudinal axis of the rocker panel body.

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1. A rocker panel assembly for attachment to a vehicle, the rocker panel assembly comprising: a rocker panel body;a first end feature situated on a first end of said rocker panel body;a second end feature situated on a second end of said rocker panel body;said rocked panel body having an outside sur

1. A rocker panel assembly for attachment to a vehicle, the rocker panel assembly comprising: a rocker panel body;a first end feature situated on a first end of said rocker panel body;a second end feature situated on a second end of said rocker panel body;said rocked panel body having an outside surface generally presented in the form of a convex surface, and an inside surface generally presented in the form of a concave surface;said outside surface extending outwardly of said vehicle, to present an outboard section having a predetermined profile based on targeted aesthetic/performance characteristics;said inside surface having at least one transverse rib positioned therein, said transverse rib being arranged generally perpendicular to the longitudinal axis L of said rocker panel body;wherein said transverse rib is integral with the inside surface of said rocker panel body; andwherein said rocker panel body comprises a wall structure having increased thickness in the region proximal said transverse rib. 2. The rocker panel assembly according to claim 1, wherein said increased thickness of said wall structure of said rocker panel body increases by up to 100% in the region proximal said transverse rib. 3. The rocker panel assembly according to claim 1, wherein said increased thickness of said wall structure is provided in the form of a taper. 4. The rocker panel assembly according to claim 1, wherein said rocker panel body and said first and second end features are injection molded. 5. The rocker panel assembly according to claim 1, wherein said rocker panel body and said first and second end features are made of polypropylene. 6. The rocker panel assembly according to claim 1, wherein at least one of said rocker panel body and said first and second end features is a Class “A” surface. 7. The rocker panel assembly according to claim 1, further comprising a plurality of mounting fixtures for mounting rocker panel assembly to a vehicle. 8. The rocker panel assembly according to claim 1, wherein said first and second end features are integral with said rocker panel body. 9. The rocker panel assembly according to claim 1, wherein said first and second end features are separately formed and subsequently attached to said rocker panel body using suitable fasteners. 10. The rocker panel assembly according to claim 1, wherein said rocker panel body comprises an upwardly extending door bearing section, and a lower-most section. 11. The rocker panel assembly according to claim 1, wherein said transverse rib is a full transverse rib. 12. The rocker panel assembly according to claim 1, wherein said transverse rib is a full transverse rib having a cut-out section. 13. The rocker panel assembly according to claim 1, wherein said transverse rib is a partial transverse rib. 14. The rocker panel assembly according to claim 1, wherein said transverse rib extends transversely to join integrally with one of said mounting fixtures. 15. The rocker panel assembly according to claim 10, wherein said outboard section is provided with increased thickness relative to at least one of said door bearing section and said lower-most section. 16. The rocker panel assembly according to claim 15, wherein said outboard section comprises a foamed core.