half-inch-square

Updated: August 3, 2026

The main chains were to be sixteen in number, with a deflection of 37 feet, each composed of thirty-six bars of half-inch-square iron, so placed as to give a square of six on each side, making the whole chain about four inches in diameter, welded together for their whole length, secured by bucklings, and braced round with iron wire; while the ends of these great chains were to be secured by a mass of masonry built over stone arches between each end of the supporting piers and the adjoining shore.

Samuel Smiles - The Life of Thomas Telford; civil engineer with an introductory history of roads and travelling in Great Britain