Normal width is a gap between slabs or walls at a median temperature approx 20° Celsius. In some cases this may be different, due to thermal or shrinkage conditions. Concrete must be fully cured to determine the normal / installation gap width.
Expansion Joints- typically each 30m in larger structures like stadiums, bridges, shopping centres, carparks and airports. Concrete expansion joints are used to separate slabs and concrete from other parts of the structure. Expansion joints allow independent movement between adjoining structural members, minimizing cracking when such movements are restrained. These joints completely isolate the slab from … Read more