Movement in buildings is a given and is allowed for by the use of control or movement joints which allow different sections of the building to move independently of each other with creating cracks or other damage to the building fabric.
The issue is that while these joints assist in one area, in relation to fire they are a problem as they can allow flames and heat to pass from one compartment to another. So you need a product that can stop the fire and also not be affected by the movement that occurs in ambient conditions.
Promat Australia has products and systems that will work in joints of up to 100mm and with movement requirements of at least +/-50%.