Robustness Design of Roofs in Small and Medium Span Steel Structure

To prohibit severe consequence of the building from an unspecified cause, some building codes included some minimum requirements. Eurocode 1991-1-7 is first introduced briefly. Classification of buildings based on failure consequences is presented and required design strategies for each class of buildings and minimum tying capacity are given. Based on this Euronorm and domestic CECS standard, proposals are presented for the supports of steel roofs for the robustness of roofs in small and medium span steel structure, requirements of bearing capacity and construction are also presented for the steel roof themselves.