Bonding Junction Walls in Blockwork

Junction walls at 90-degree angles (‘T’ junctions) are quite common in blockwork, particularly when forming new internal partitions. A typical bonding arrangement for tying in the junction wall (see Fig 103) involves a three-quarter block (330mm) introduced into the main wall on alternate courses, which effectively leaves a 120mm indent (100mm block + 2 x 10mm cross-joints = 120mm). This allows the junction wall to be bonded into the main wall. On alternate courses of the junction wall a 105mm cut is introduced at the junction to maintain half-bond.