- An even surface with a minimum depth of 90mm for concrete or 100mm for tarmac.
- A hammer / SDS drill with a 1/2" / 13mm chuck.
1. Lay out the speed bumps in the desired location. Ensure that each speed bump lies flat on the surface and in a straight line. Use the black speed bump connectors (two connectors per section) Uneven fastening may place uneven stress on the speed bumps.
2. Mark the holes to be drilled, making pilot holes, with a smaller drill bit. Take care to mark these as accurately as possible.
3. Move the speed bump from its position, and drill the four holes using a 14mm masonry drill bit or 20mm for tarmac.
4. Place a washer on the top lip of each hole of the speed bump, and thread the bolt onto the rubber sleeve through the speed bump (the threaded end of the rubber sleeve should be furthest away from the speed bump).
5. Place the speed bump back into position, locating the rubber sleeves into the drilled holes.
6. Tighten the bolts so that the speed bump is firmly held in place. Remember to tighten evenly and tension the bolts in a diagonal manner.