Kerbs are manufactured in 36″ (915mm) lengths but can be cut to shorter lengths to form curves. As a general rule for kerbs up to 6″ wide and laid on their edge:
- 915 mm (36″) lengths for 9.0 m radius upwards
- 450 mm (18″) lengths for 6.0 m radius upwards (see Fig 1)
- 300 mm (12″) lengths for 2.0 m radius upwards
Shorter lengths will be required for a radius less than above.
Cut kerbs can be supplied or formed on site by cutting a 30 mm minimum deep cut on all exposed surfaces with a disc saw. Place kerb in position and tap back of kerb with hammer. When kerb breaks, position kerb to required radius allowing a space between for grout.
Typical detail showing drop kerbs (Fig 2)