Mixing welds and bolts
According to Eurocode 1993-1-8:2005 clause 2.4 (3), if a connection is composed of welds and bolts, the fastener with the highest stiffness should carry the whole load. In that case bolts, and in particular normal bolts with hole clearance, will not contribute to the joint resistance at all. However, there as some exceptions: Clause 3.9.3 (1) of the same code says that: "As an exception to 2.4(3), preloaded class 8.8 and 10.9 bolts in connections designed as slip-resistant at