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Using notes and neat freehand sketches, show two considerations that should be taken into account when laying sewer pipes for a domestic dwelling to ensure the safe removal of sewage from the dwelling - Leaving Cert Construction Studies - Question 2 - 2007
Question 2
Using notes and neat freehand sketches, show two considerations that should be taken into account when laying sewer pipes for a domestic dwelling to ensure the safe ... show full transcript
Worked Solution & Example Answer:Using notes and neat freehand sketches, show two considerations that should be taken into account when laying sewer pipes for a domestic dwelling to ensure the safe removal of sewage from the dwelling - Leaving Cert Construction Studies - Question 2 - 2007
Step 1
Considerations when laying sewer pipes
Answer
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Layout Simplicity: Pipes should be laid in a straight line to minimize changes in direction. This reduces the risk of blockages and ensures efficient flow.
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Proper Gradient: The pipes need to be installed with a consistent slope to facilitate optimal drainage. For instance, using a 6.0 meter long uPVC sewer pipe should maintain an even slope for effective sewage flow.
Step 2
Inspection Chamber Section
Answer
A well-labeled freehand sketch should be provided, illustrating:
- Concrete Foundation: This must be robust enough to support the structure.
- Side Walls: Clearly depicted with appropriate dimensions.
- Position of the Drain: Marked correctly to show the entry point into the chamber.
- Bending to the Drain: Angled appropriately to ensure a continuous flow of sewage without obstruction.
- Cover of Inspection Chamber: Highlighted to indicate accessibility for maintenance.
Step 3
Reason for the location of inspection chamber at A
Answer
The inspection chamber is located at A for the following reason:
- Access for Maintenance: Blockages are likely to occur at this point, and having an inspection chamber allows for easy access to clear any blockages and perform necessary maintenance.