cross section

Aloha, is there a program that lets me input measurements from plans and then allows me to see horizontal cross-sections with dimensions to transfer to plywood? I'm experimenting with foam blocks and I need to see if I can transfer the horizontal measurements to plywood to carve out sections...

Dear all I am working on a 30 m aluminum catamaran project and I did all necessary calculation for determining the scantling for the cross beam in terms of strength. In my thought, This portion will consist of upper plate (which is the main deck) and lower plate and there are stiffeners welded...

I was thinking about the above layers for the hull of the catamaran..... All foam mentioned in the exterior skin would be Corecell Foam considering it's economical price. Is there any material you would use instead? and why? What layers of this cross-section would you add or remove? And why...