Steel Buildings in Europe

Part 10: Technical Software Specification for Composite Beams 10 - 11 2.4.2 Positioning of the connectors The position of the connectors can be defined over 1, 2 or 3 segments of the beam. For more than one segment, the length of each segment has to be given. The sum of these lengths should be equal to the length of the beam. For each segment, the following parameters have to be defined:  The number of rows: 1 or 2  The distance between two consecutive connectors along the beam. When a profiled steel sheeting is perpendicular to the beam, the distance between studs is n  b s , where n can be equal to 1, 2 or 3. 2.5 Loads The software allows the user to define elementary load cases that are used in the combinations of actions for ULS and SLS according to EN 1990 [2] . Only gravity loads are considered (downwards). Up to three elementary load cases are considered within these specifications:  1 permanent load case, denoted G  2 variable load cases, denoted Q 1 and Q 2 For each load case, it is possible to define a uniformly distributed surface load q surf . For a beam defined as “secondary beam”, a linear distributed load is derived: q lin = q surf ( B L + B R )/2 where: B L and B R are the distances between beams (left and right). For a beam defined as “primary beam”, one or two point loads are derived from the distributed surface load. The self weight of the rolled profile and the weight of the concrete slab are automatically calculated. For each variable load case, the combination factors  0 ,  1 and  2 have to be defined. When the beam is unpropped at the construction stage, a construction load should be defined by the user. The default value is 0,75 kN/m 2 .