Cold rolled steel sections are a lightweight alternative to the
relatively heavy, hot rolled steel sections that have been
traditionally used in sub-framing situations, e.g. purlins, joists and
sheeting rails. Cold rolled sections are generally only a few
millimetres in wall thickness, saving on material and handling costs
and building dead load. They are also produced in a wide variety of
section profiles, some of which are shown below.Dimensions vary considerably and many non-standard profiles are
made for particular situations. A range of standard sections are
produced to:BS EN 10162: Cold rolled steel sections. Technical delivery
conditions. Dimensional and cross sectional tolerances.Structural Steelwork---Standard Cold Rolled Sections