Access to underground chamber systems is often achieved by lifting manhole cover lids; inserting lifting keys into their keyways, then lifting the lids from the frame and placing them on the pavement surface near the chamber opening.
Problems With Existing Assets
- Manhole lid keyway pockets can often be filled with debris which prevents the insertion of a lifting key to such an extent that operatives attempt other unsafe methods of lid removal.
- Significant time can be wasted on site by operatives attempting to clear keyways enough to allow key insertion, particularly where covers have not been accessed for long period.
Fortunately, Wrekin has solved this common issue with a simple, but effective remedy: an anti-blockage keyway insert (Figure 2) which fills the lid keyway pocket with a material that prevents detrimental debris ingress, but allows the insertion and rotation of a lifting key.
For a limited time, Wrekin are giving away our patented GritBlocker™* foam keyway inserts, designed to stop debris from blocking the keyway, ensuring quick lifting key access when required.
- Inhibits debris from entering keyway
- Reduces operative time in carriage way
- Can be installed on virtually any cover
*whilst stock lasts. GritBlocker™ comes pre-installed, no need to remove when using your lifting keys!