Pipe Cover Calculator
Cover to the pipe crown and the crown level, from ground and invert levels.
Inputs
Results
Cover to pipe crown
1.35m
Crown level 18.65 m
Pipe crown level18.650m
Pipe outside diameter0.250m
Ground level20.000m
Cover measured to the outside of the pipe. Minimum cover requirements are set by the applicable authority and are not checked here.
Calculation details
Engineering equations
Crown level = invert level + outside diameter
Cover to crown = ground level − crown level
Variables
- Ground level
- Finished surface level (m)
- Invert level
- Pipe invert level (m)
- Outside diameter
- Pipe outside diameter (m)
- Crown level
- Invert level plus the outside diameter (m)
- Cover
- Depth of fill over the pipe crown (m)
Assumptions
- Levels are in metres and referred to the same datum.
- Cover is measured to the outside of the pipe at the crown.
- Wall thickness is represented by the outside diameter entered.
- Minimum cover requirements are set by the applicable authority and are not checked here.
Worked example
Ground level 20.00 m, invert level 18.40 m, outside diameter 250 mm
Crown level = 18.40 + 0.25 = 18.65 m
Cover = 20.00 − 18.65 = 1.35 m
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Results are preliminary engineering estimates based on the stated assumptions. Confirm inputs, assumptions and requirements against the applicable standards and authority requirements before use in design or construction.