Steel Buildings in Europe

Part 5: Detailed Design of Trusses 5 - 11 2 INTRODUCTION TO DETAILED DESIGN The detailed design of trusses is illustrated in the following Sections by reference to a ‘worked example’. This Section summarizes the general requirements and introduces the example. The topics covered in subsequent Sections are: Section 3: Global analysis Section 4: Verification of members Section 5: Verification of connections Fully detailed calculations for verification of a gusset plate connection and a chord splice are given in Appendices A and B. 2.1 General requirements The parameters to be taken into account in design are:  Aesthetics  Geometry (span length, height, rise, etc)  Actions. The following requirements have to be considered:  Regulatory requirements  Contractual requirements with regard to standards  Specific contractual requirements. The resulting outcome of a design is the set of execution documents for the structure. The nature of regulatory requirements varies from one country to another. Their purpose is usually to protect people. They exist in particular in the area of seismic behaviour, and for the behaviour of buildings during a fire (see Single-Storey Steel Buildings. Fire engineering Guide 1 ). The requirements in standards concern the determination of actions to be considered, the methods of analysis to be used, and the criteria for verification with respect to resistance and stiffness. There is no limit to the number of specific requirements which may be imposed for any particular building but these mainly concern construction geometry; they influence determination of actions, in particular climatic actions. Obligations and interface arrangements for detailed design might include:  Banning the use of tubes for the bottom chord of trusses to which the industry client wishes to hang equipment  Obligation to use tubes for truss chords for reasons of appearance