Steel Buildings in Europe

Part 9: Design Software - Simple Connections 9 - 6 Connection resistances and drawn connection details are immediately updated as input data is modified by the user. The standardised details can be restored at any stage. If warnings are displayed on the diagrams because of some geometrical check not being satisfied, the drawing will not update. An updated drawing will only appear once the geometric warning has been resolved. Resolving one warning may then reveal a second problem, which must again be resolved before the drawing will update. A more detailed table of the resistance of each connection component can be viewed and printed. Connection classification Beam and baseplate connections are assumed to be nominally pinned connections. Although the connections possess some rotational stiffness and some rotational strength, these are assumed to be sufficiently small that their influence can be ignored, and the assumption of pinned behaviour is valid. EN 1993-1-8 requires connections to be classified. Connection classification may be made on the basis of calculations, or based on previous satisfactory experience. For each connection covered by the spreadsheet, standardised connections are proposed, which have sufficient use in practice to justify classification as nominally pinned on the basis of previous satisfactory experience. Within each connection type, the user may modify a large range of variables, and thus produce a non-standardised connection. Designers should note that if connections other than the standardised solutions are adopted, the connection should be classified in accordance with EN 1993-1-8. 1.2.2 National Annex The workbook includes National Annex values for  M0 ,  M1 ,  M2 and  c for the following countries: The National Annexes covered are:  Belgium  France  Germany  Italy  Netherlands  Poland  Spain  United Kingdom For tying resistance, the spreadsheet adopts a value of  Mu = 1.1. The user has the option to overwrite the in-built National Annex values, allowing flexibility should the values be modified by the national standards body.