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Securing The Manhole Covers On
Telephone Utility Vaults
The security of telephone utility vaults with manhole
access can be improved significantly with the Lift & Lock
manhole cover. The Lift & Lock manhole is beneficial in four ways:
1. Each existing manhole cover can be machined to include the lock bolts.
It is not necessary to disrupt the pavement or ground surface, remove the
manhole frame, and restore the site. The high restoration costs are avoided.
2. You can choose any one of three types of lock bolts depending on the level
of security desired: standard bolts, pentagon-shaped bolts, or special key-lock
bolts with registered or exclusive key configuration. The bolts can be changed
if the desired level of security changes.
3. The bolts do not need to be removed, only loosened. The bolts will not
get lost, misplaced, or fall in the manhole.
4. You do not need to wrestle with the cover to line up the holes in the
cover with the holes in the frame. You will save time and frustration as
well as avoid stripping the threads due to slight misalignments of holes.
Contact Arthur A. Schrage, PE for more information
about manhole covers for telephone utility vaults
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