Working on a jargon article for SailWiki (http://wiki.saewyc.net)

From Hiscock's "Cruising under Sail" - Scantlings: The dimensions of
the members used in the construction of a vessel.

I always thought scantlings were primarily the dimensions of the
skin/deck planking, not just the frames? And of course with other
materials like fiberglass there might not be *any* internal structure.
So what would a one-sentence overview definition of "scantlings" be?

Amgine