The square, high strength steel built-up box T-joints tested in this
study were fabricated from RQT-S690 steel plates by flux core arc
welding (FCAW). The weld profiles were designed according to the
complete joint penetration groove weld method prescribed in the
AWS structure welding code for steel [15]. The welding electrode
employed is OK Tubrod 15.09 FCAW, which complies with EN 12535:
2000 [16]. Its mechanical properties are also shown in Table 1.