Fig. 4.1
Fig. 4.4
Fig. 4.3
Fig. 4.2
Step 1: Drilling preparation
Instructions:
1. Place the device with the bottom edge approximately 10mm
from the manhole lip.
2. Mark the position of the holes with a pencil or punch.
Step 2: Drilling
Instructions:
1. Mark a drill depth of 13mm on the drill bit (2mm diameter).
2. Drill the hole vertically into the manhole cover, taking care to
stop at the marked depth.
4. Device Installation
Fibre-reinforced Polymer Type
6