ᐅ Trench Construction – Channel Bottom Elevation vs. Cover Level
Created on: 23 Sep 2015 13:10
T
torsan
Hello!
I’ve obtained the connection heights and the finalized street plan for my property. The driveway is going to be prepared so I can drive a car onto the plot.
I’m thinking I can use the manholes as a rough reference for determining the final heights. Now I’ve come across two terms: invert level and cover level.
Can someone explain where the invert level and cover level of a sewer are located? Is the invert level the lowest point?
Thanks in advance, Torsan
I’ve obtained the connection heights and the finalized street plan for my property. The driveway is going to be prepared so I can drive a car onto the plot.
I’m thinking I can use the manholes as a rough reference for determining the final heights. Now I’ve come across two terms: invert level and cover level.
Can someone explain where the invert level and cover level of a sewer are located? Is the invert level the lowest point?
Thanks in advance, Torsan
@Dirk Grafe Then I misunderstood the question.
For our project, it was specified that the entire development area must be built at an elevation of 478.80 meters (1,570 feet) above sea level. Because of this, I had to maintain this elevation level at the property boundary. I positioned my house accordingly so that I could measure from this level (plus about 10 cm (4 inches) or so).
The road was paved afterward, and the manhole covers were only surveyed and installed afterward as well.
Homeowners who measured from the original manhole cover have noticed differences of up to 20 cm (8 inches), which they are now experiencing at their garage entrances,...
For our project, it was specified that the entire development area must be built at an elevation of 478.80 meters (1,570 feet) above sea level. Because of this, I had to maintain this elevation level at the property boundary. I positioned my house accordingly so that I could measure from this level (plus about 10 cm (4 inches) or so).
The road was paved afterward, and the manhole covers were only surveyed and installed afterward as well.
Homeowners who measured from the original manhole cover have noticed differences of up to 20 cm (8 inches), which they are now experiencing at their garage entrances,...
This issue can also be avoided by following the solar heights and directing the water accordingly.
Admittedly, if the road is still a construction access road, the final height of the finished road cannot be determined down to the last centimeter, but for rough driveway preparation, the current height including the planned height is sufficient.
The finished road will not be significantly higher than the planned height; otherwise, all adjacent properties would have lower lying land, which no one wants if it can be avoided.
Surface water must, of course, be able to flow into the drain or the finished gutter. If there are concerns about limited space, it is advisable to consult the building authority or the construction company responsible for the road, to find out what build-up to expect on the construction road.
For rough planning— which, as I understand, is the purpose here— the heights of the existing manhole covers must first be verified to derive the planned elevation. These manhole cover heights are also included in the building permit/planning permission documents, so the relationship between the house (top edge of the finished floor slab) and the planned street height must be clear there as well.
Best regards,
Dirk Grafe
Admittedly, if the road is still a construction access road, the final height of the finished road cannot be determined down to the last centimeter, but for rough driveway preparation, the current height including the planned height is sufficient.
The finished road will not be significantly higher than the planned height; otherwise, all adjacent properties would have lower lying land, which no one wants if it can be avoided.
Surface water must, of course, be able to flow into the drain or the finished gutter. If there are concerns about limited space, it is advisable to consult the building authority or the construction company responsible for the road, to find out what build-up to expect on the construction road.
For rough planning— which, as I understand, is the purpose here— the heights of the existing manhole covers must first be verified to derive the planned elevation. These manhole cover heights are also included in the building permit/planning permission documents, so the relationship between the house (top edge of the finished floor slab) and the planned street height must be clear there as well.
Best regards,
Dirk Grafe
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