128585 ⎘
underground or underwater structures Independent ; Retaining walls; Manhole shafts; Other inspection or access chambers; Accessories therefor Steps or handrails for shafts
Underfloor Storage Vault
#2Variable sliding manhole safety guard
#3Underfloor storage vault
#4Device for securing a rung in a concrete wall
#5Safety railing for utility hatch
#6Manhole frame with one or more handholds
#7Manhole frame with one or more handholds
#8Manhole frame with one or more handholds
#9Safety hatch system
#10Safety landing
#11Tunnel Connector for an In-Ground Storm Shelter
#12Integrated safety rail protection system
#13Safety device for use in well
#14Manhole frame with one or more handholds
#15Safety hatch system
#16Adjustable support apparatus for a utility access cover
#17ADJUSTABLE SUPPORT APPARATUS FOR A UTILITY ACCESS COVER
#18Ladderway system for underground raises
#19Automatic retractable hatch guard
#20Integrated safety rail protection system
#21Safety hatch system and egress
#22Manhole construction safety and work platform device
#23Retrieval and fall arrest system for manhole applications
#24Manhole insert and tether locking apparatus and method
#25Two-sided manhole step