Steel Buildings in Europe

Part 5: Joint Design 5 - 85 Notes: 1. Bolt spacing and edge distances should comply with the recommendations of EN 1993-1-8:2005 2. The thickness of the flange cover plate should be at least the minimum of 10, t f,uc /2 and p 1 /14. 3. The thickness mentioned in Note 2 is in most cases sufficient to transmit at least 25% of the maximum compressive force in the column, as required by EN 1993-1-8 [§6.2.7.1(14)]. 4. The column splices should be located at approximately 600 mm above floor beam level. It is also recommended to use a minimum of four bolts. In a braced frame, columns containing such splices will behave satisfactorily even if the joint effectively behaves as a pin. In practice, typical bearing column splices as given in this guide will provide significant stiffness about both axes, although less than full stiffness. 5. In common practice the width of the flange cover plate would not be greater than the width of the lower column flange. However if the width of the flange cover plate is narrower than the upper column flange then edge and end distances should be checked against the Eurocode (EN 1993-1-8 Table 3.3). If there is significant net tension then the following notes should be adhered to: 6. Bolt diameters must be at least 75% of packing thickness t pa [11] . 7. The number of plies in multiple packs should not exceed four [11] . 8. There should not be more than one jump in serial size of column at the splice. 9. If external and internal flange covers are to be provided, the size should be similar to those shown in the figures and the combined thickness of the external and internal cover plates must be at least t f,uc / 2. All cover plates should be at least 10 mm thick.