Such movement sets up stresses in the panels and may cause failure and distortion of the brickwork in the form of buckling. This is more likely to occur, when cavity construction is used, together with a 'facing' to the edge beam of tiles, slates or brickettes. Using a compression joint at the top of each panel to allow for movement. The top restraint can be removed by using a special form of anchor. This allows movement vertically and provides lateral restraint.
Ties provide direct support to the brickwalls as shown below.