The automobile expert told because of what at many SUVs and parketnik on a roof edges are made

At many modifications of SUVs the roof has special longitudinal edges whereas models of cars with modest sizes, such as sedans, do not have this element. The automobile expert told that represent these constructive parts: design course or practical choice. Why edges are necessary? Such element as edges on a jeep roof, are structurally dictated in any way by attempts of engineers to strengthen and before the powerful case. Experts explain that it is necessary for two simple reasons. The reason No. 1 — simplicity of production of a roof. Actually to make industrially the ridge...