TERMINOLOGY

TERMINOLOGY

1. Gully
An assembly to receive surface water for discharge into the drainage system.

2. Manhole
A chamber or access shaft to underground system.

3. Gully Top
That part of a gully, consisting of a frame and grating and/or cover and which is placed on the gully pot at the place of installation.

4. Manhole Top
The part of a manhole consisting of the frame and a cover and/or a grating.

5. Frame
The fixed part of a gully top or manhole top of which receives and support a grating and/or a cover.

6. Grating
The movable part(s) of a manhole top or a gully top, which permits the passage of water through itself to the gully.

7. Cover
The movable part(s) of a manhole top or a gully top, which permits the passage of water through itself to the gully.

8. Vent
An opening in the cover of a manhole top provide ventilation.

9. Dirt Bucket
A removable component of a gully or a gully top which collects debris.

10. Dirt Pan
A removable component of a manhole or manhole top which collects debris

11. Seating
The surface on which the grating or the cover rests in the frame.

12. Depth of insertion, A mm

TERMINOLOGY - Depth of insertion, A mm

 

13. Bearing Area, mm²
The surface of the underside of a frame which rests upon the supporting structure.

14. Clear Opening, CO mm
The diameter of the largest circle that can be inscribed in the clear area of the frame.

TERMINOLOGY - Clear Opening, CO mm

 

15. Clear Area, m²
The unobstructed area between the seatings i.e the shaded area as shown in the figure below.

TERMINOLOGY - Clear Area, m²

 

16. Mass per Unit Area (kg/m²)
Total mass of the cover or the grating in kg divided by the clear area in m².

17. Cushioning Insert
Material in a frame, grating or cover used to provide a non-rock seating.

18. Test Load (kN)
Load applied to gully tops or manhole tops when tested.

19. Pedestrian Areas
Area reserved for pedestrian and only occasionally open vehicular traffic for delivery, cleaning purposes or in emergency.

20. Pedestrian Areas
Area where vehicular traffic is prohibited during certain periods (e.g. pedestrian areas during business hours and vehicular traffic outside these hours.