channel section

noun

channel section

noun

1

A length of steel or aluminium with a C-shaped or U-shaped cross-section.

The car body is a light steel shell fabricated by welding from top-hat, channel, and Z sections.1958 April 23, “Diesel Railbus for British Railways”, in Railway Magazine, page 276:

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.