Example on the Design of Steel Roof Trusses The flexural buckling in Eurocode 3 is achieved by applying a reduction factor to the compression resistance. In most truss members, only flexural buckling of the compressed members in the plane of the truss structure and out of the plane of the truss structure need to be evaluated. However, it should be noted that the architectural design of the building determines its external geometry and governs the slope given to the top chord of the truss.įor the design of a compression member in a roof truss, several buckling modes need to be considered. For a good structural performance of roof trusses, the ratio of span to truss depth should be in the range of 10 to 15.
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