A computer-based optimal design approach for residential roof trusses using cold-formed steel C-sections is presented. The truss design is based on CSA S136-94 and the truss design guide published by the American Iron and Steel Institute and the Canadian Sheet Steel Building Institute. A genetic algorithm was adopted to obtain the minimum cost design with consideration to truss topology and member size simultaneously. The presented design examples demonstrate the applicability and efficiency of the proposed approach.
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