Specifications for open cold-formed sections
The profile dimensions and angular accuracy of a cold-formed section should be measured at a point not less than 150 mm from the end of the section. The straightness of any length shall be such that the offset does not exceed 1/500 of that length.
The deviation of any profile dimensions shall not exceed ± 2 mm or 1.5%. whichever is the greater. The deviation from the angle of 90º shall not exceed ± 1º at any corner.
The sections shall be reasonably free from twist and in particular cases the acceptable degree of twist shall be the subject of agreement between the purchaser and the manufacturer prior to the placing of an order.
The profile dimension tolerance shall not apply to elements having a free edge, e.g. the legs of unlipped angles, channels and Z-sections, nor to the lips of lipped angles, channels and Z-sections. In these cases the tolerances shall be -2 to +5 mm. Tolerances on cold-formed sections outside the ranges tabulated are subject to agreement beween the purchaser and the manufacturer.
Tubecon cold forms lip channels and profiles such as top rails, side rails, top hats and zed sections in accordance to our customers specification.