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The Propurlin range of purlins and sheeting rails have been designed in accordance with the requirements of BS 5950: Part 5: 1987.
To resist the effects of atmospheric corrosion, the Propurlin range of purlins and sheeting rails are manufactured in a high tensile quality, continuously hot dip zinc coated structural steel strip to EN 10147: 1992, grade Fe E 350 G coating designation 275 grms / m2. |
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The design of the Propurlin profile, with the vertical web element within the perimeter of the profile flanges, reduces the displacement of the principal axis to the vertical plane by a considerable amount, when compared with the plain zed profile of similar proportions. A typical Propurlin profile 175mm in depth has a displacement of the principal axis to the vertical plane of 4.9 degrees, whereas the plain zed profile deviates by 12.5 degrees. |
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In present day structural design a large proportion of rigid frame buildings are manufactured with roof slopes varying between 4 to 8 degrees. Profiles with principal axes deviations greater, or less than the roof slope, are subject to bi-axial bending about the major and minor axes when dead and superimposed, or wind loads, are applied to the structure. These bi-axial loads will tend to cause torsional deformation which will have a detrimental effect on the performance of the profile. The Propurlin with its lower angle of deviation will be more resistant to these bi-axial loads than a plain zed profile of similar proportions. |
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Propurlin has been computer designed to ensure the ultimate section for your requirements. Designed to B.S. 5950 part 5 with 75mm flanges on all section sizes for easy and fast sheeting on site. All Propurlins are manufactured to EN 10147: 1992, grade Fe E 350 G coating designation 275 grms / m2, prime quality galvanised steel with a minimum yield strength of 350 N/mm2. |
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