Ship architecture query

Stylized schematic, "plan and profile" ship rib or frame construction

In the New York State Bear Mountain Park, I helped record the remains of two centerboard Hudson River cargo carriers for the SHPO with Grossman & Associates. The frames were part wood and part iron, without nuts. The pieces were joined with a short rod through the frame sections and then planked on the outside. The centerboard box, to lower and raise the blade in shallow or deep water and counteract the effect on the large sail tipping the hull and to steer, was also made with driven iron rods through wood without end attachments. I was wondering if anyone is familiar with this type of ship construction perhaps made in the West Point Foundry in Cold Spring, NY. They held records in sailing from NYC to West Point. These, seen abandoned in the background of a photo of a Henry Hudson "Halve Moon" replica sailing by Bear Mountain in 1939 (? Worlds Fair in NYC? 330 year anniversary, the 400th next year) were perhaps similar to the circa Civil War constructions used in the "green sand" for iron moulding mined nearby.