Describes tolerances for hot finished circular, square, rectangular and elliptical structural hollow sections, manufactured in wall thicknesses up to 120 mm, in the following size ranges: Circular: Outside diameters up to 2 500 mm; Square: Outside dimensions up to 800 mm x 800 mm; Rectangular: Outside dimensions up to 750 mm x 500 mm; Elliptical: Outside dimensions up to 500 mm x 250 mm.