How differentiates front and top in streamline superstructure

[lyqqmxm]

In structure computation，i want add a longitudinal stiffener in front of streamline superstructure, but i don't kown how differentiates range of front and top, so i don't confirm the span of the stiffener.
please give me some suggestion, thank you very much

[terhohalme]

I would split the span at the deepest point of stiffener curvature. I think you pointed that in your sketch.

[PAR]

Hiring an engineer to work out these details, is always a wise decision.

[lyqqmxm]

I would split the span at the deepest point of stiffener curvature. I think you pointed that in your sketch.

Dear Terhohalme

Please see attached file