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| Design of C Purlins Spreadsheet |
the design of a puriin system, known as Multibeam Mark 2, based on a cold-formed steel Sigma profile. The alternative approaches to design were reviewed and a semi-empirical design procedure was described which resulted in safe but competitive load-span tables. This paper describes the design of Multibeam Mark.
3. This involves a further evolution of the cross-section together with further improvement
of the design procedure. The tendency is to continue to move away from reliance on testing
and towards an approach which is much more orientated towards design by calculation.
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