Manhole cover support having interbraced top members
Manhole cover support resistant to water infiltration
Manhole cover support ring
Manhole cover support ring
Manhole cover support with box flanging
Manhole cover support with flange borne on its own base
Manhole cover support with topside flange
Manhole cover support with topside flange and inclined seat
Manhole cover system
Manhole cover tool
Manhole covering
Manhole covers with attachment means for decorative strips
Manhole extender ring system and method of use
Manhole extension
Manhole extension assembly
Manhole frame
Manhole frame assembly
Manhole frame with adjustment screws
Manhole grade adjusting ring and method
Manhole having a splayed rib ring formed at underside of the lid