Offset sections for a stepped chine boat

[TimothyM]

I have a customer that wants me to cut station molds to build a plug for a stepped chine boat. The attached drawing shows a section in blue and the ammount he wants to offset for sheathing the plug in red. How do I offset this section and keep the chine locations and/or how is a plug like this normally built?

[gonzo]

Have you ever lofted? If he wants molds cut at the red line, what is the problem?

[TimothyM]

I know how to loft, but I have never built a plug for this type of boat. What I really need to know is how this type of mold is sheathed so I can offset the lines correctly

[PAR]

Typically you subtract the hull shell thickness from the station mold. Of course this means you'll need scantlings for the hull shell, so you know how much to deduct.