scantling

Scantling is a term used in shipbuilding and timber construction to describe the dimensions and specifications of a structural member. It refers to the size of the piece, typically its cross‑section (width and depth) and sometimes its thickness, as well as the material quality required for a given function. The concept focuses on ensuring strength, stiffness, and suitability for the loads the member must carry.

In naval architecture, scantlings specify the dimensions of hull components such as frames, beams, keel, planking, and deck members. A scantling plan translates the lines plan into actual sizes and is governed by rules set by classification societies and engineering practices. Scantlings are determined by considerations of bending, shear, buckling, stability, and the operating service of the vessel. Accuracy in scantling affects weight, performance, and safety.

In timber construction and carpentry, scantling describes the cross‑section of timber members like beams, joists, posts, and studs. The nominal dimensions used in planning (for example, a 2x6) may be reduced to actual finished sizes after planing. Scantlings are selected based on span, load, species, and grade, and building codes often specify minimum scantlings for structural elements.

The term emphasizes standardized sizing for structural adequacy rather than decorative purpose. Proper scantling ensures that components perform as intended within a given design and code framework.