11 external%20works3.compressed
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BUILDING CONSTRUCTION 1 ARC 1523PROJECT 1 : DOCUMENTATION AND ANALYSIS PREPARED BY : RENEE LIM WEI FEN (0311016) 9
The diagram below shows the external works of the sewerage system where roof drain connections, drain foundations, road drainage all links down to one main sewer pipe.
Offset Sight Rail
Sewer Pipe
Existing ground
Soffit level
Invert level
Offset Distance
Depth of coverLength of traveller required for initial excavation
Sewerage works also requires a small step of settingout in order to excavate and lay the sewer pipe downunderground with the right gradient in the ground.
Gutters that collect rain water for rood water drainage
Underfround pipelines for drain foundation aroundthe house.
Manhole cover and framethat is needed durng servicing of the sewer system.
Sewer pipe where all water slows to that will exit out of the housing area.
3.1 EXTERNAL WORK
SEWERAGE WORKS