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A main bathroom, as shown in the sketch, is located on the first floor of a dwelling house - Leaving Cert Construction Studies - Question 4 - 2009
Question 4
A main bathroom, as shown in the sketch, is located on the first floor of a dwelling house. (a) Using notes and freehand sketches show two design considerations tha... show full transcript
Worked Solution & Example Answer:A main bathroom, as shown in the sketch, is located on the first floor of a dwelling house - Leaving Cert Construction Studies - Question 4 - 2009
Step 1
Using notes and freehand sketches show two design considerations that should be taken into account when locating the bathroom on the first floor of a dwelling house.
Answer
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Accessibility:
- Ensure access for all users including disabled and children.
- Centrally located for easy access from bedrooms.
- Ensure minimum unobstructed width of corridor 900mm for ease of circulation.
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Safety:
- Safety of access from bathroom door to staircase.
- Ensure that the bathroom is located on an external wall to maximize ventilation and access to natural light.
Step 2
Using notes and freehand sketches show the above-ground pipework necessary for the safe discharge of waste from the following fittings: wash hand basin.
Answer
Wash Hand Basin
- The wash hand basin discharges via a branch pipe to a 100mm stack or a gulley on ground floor.
- Branch pipe has a maximum length of 1.7m for a typical 32mm diameter pipe.
- Slope of branch pipe should be between 18-90mm in depth.
- Use a P-trap or deep-seal trap fitted directly under the outlet, with a trap size of 32mm minimum diameter and 75mm in depth.
Step 3
Using notes and freehand sketches show the above-ground pipework necessary for the safe discharge of waste from the following fittings: bath.
Answer
Bath
- Bath discharges via a branch pipe to a 100mm stack or gulley on ground floor.
- Branch pipe has a maximum length of 3.0m for typical 40mm diameter pipe.
- Typical slope of branch pipe should also be between 18-90mm in depth.
- Use a P-trap or deep-seal trap fitted directly under the outlet, with a trap size of 32mm minimum diameter and 75mm in depth.
- Ensure all small sized connections (less than 65mm) are offset by 110mm on a 100mm stack.
Step 4
Using notes and freehand sketches show the design detailing necessary to prevent the penetration of sewer gases into the bathroom at the W.C.
Answer
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Ensure stack is ventilated above eaves:
- The stack must be vented above the eaves to prevent back pressure.
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Water and air tight seat at W.C.:
- Use a 75mm diameter and 300mm deep integrated trap.
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Ensure installation of branch pipework length and slope:
- Follow the recommended installation with a length of 2.0m and slope of each branch pipe being 90mm.
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Connect directly to stack from branch connection to stack.