This document specifies tolerances for cold formed welded circular, square, rectangular and elliptical structural hollow sections, manufactured in wall thicknesses up to 40 mm, in the following size ranges: circular: Outside diameters up to 2 500 mm; square: Outside dimensions up to 500 mm × 500 mm; rectangular: Outside dimensions up to 500 mm × 300 mm; elliptical: Outside dimensions up to 480 mm × 240 mm.