This part of EN 10219 specifies tolerances for cold formed welded circular, square and rectangular structural hollow sections, manufactured in wall thicknesses up to 40 mm, in the following size ranges:Circular: Outside diameters up to 2 500 mmSquare: Outside dimensions up to 500 mm x 500 mmRectangular: Outside dimensions up to 500 mm x 300 mmThe formulae for calculating sectional properties of sections manufactured to the dimensional tolerances of this standard, to be used for the purposes of structural design, are given in Annex B.Dimensions and sectional properties for a limited range of sizes are given in Annex C.Technical delivery conditions are specif