Manholes –Manholes are cylindrical hollow concrete structures typically installed vertically below grade. Manholes are an assembly of various components and are then capped at street level with a round cast iron cover. They are placed at vault openings or pipe junctions and provide maintenance and inspection access to underground piping systems.
Manhole Slab Top Components –Slab tops are typically used with larger diameter manholes and allow for smaller risers or cones to be used to increase height or reach grade level. Slab tops are available in a variety of sizes.
Manhole components include:
- Base Unit
- Riser Sections
- Concentric/Eccentric/Slab Tops
- Grade Rings
- Cast Iron Ring/Cover