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A 215 mm solid concrete block wall separates two rooms on the ground floor of a dwelling house - Leaving Cert Construction Studies - Question 1 - 2018
Question 1
A 215 mm solid concrete block wall separates two rooms on the ground floor of a dwelling house. A strip foundation supports the wall, which is plastered on both side... show full transcript
Worked Solution & Example Answer:A 215 mm solid concrete block wall separates two rooms on the ground floor of a dwelling house - Leaving Cert Construction Studies - Question 1 - 2018
Step 1
(a) To a scale of 1:5 draw a vertical section through the strip foundation, the 215 mm wall, the ground floor and the centre of the door up to a point 500 mm above finished floor level.
Answer
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Draw the Section: Begin by sketching a vertical section that outlines the strip foundation and the 215 mm concrete block wall. Be sure to represent the two rooms clearly.
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Add Dimensions: Accurately scale the drawing to 1:5. Mark the dimensions for the strip foundation (200 mm concrete sub-floor), the wall (215 mm thick), and the door (60 mm)
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Include Details: Add specific details such as the 15 mm internal plaster, 100 mm x 15 mm skirting board, and 20 mm tongue and groove hardwood floor. Make sure to show the 600 mm floor width on each side of the wall.
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Indicate Typical Dimensions: Clearly label three typical dimensions on the drawing as required.
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Final Touches: Ensure all elements are proportionally correct and add any remaining features or annotations necessary to enhance clarity.
Step 2
(b) Show on your drawing the typical design detailing to prevent radon gas from entering the rooms through the floor.
Answer
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Illustraate the Radon Barrier: On your drawing, indicate a continuous layer of impervious material underneath the floor to act as a radon barrier. This should be shown at the level where the concrete floor meets the ground.
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Placement of Impervious Layer: Clearly depict how this layer covers the entire surface area beneath the ground floor, extending to the edges of the walls.
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Sealing Details: Illustrate how all joints are to be carefully sealed and taped to ensure that there are no gaps for radon gas to enter the rooms.
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Additional Notes: Annotate your drawing with descriptive notes that explain the purpose of each detail, specifically how these elements work together to prevent radon ingress.