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The sketch shows the front door of a dwelling house - Leaving Cert Construction Studies - Question 1 - 2022
Question 1
The sketch shows the front door of a dwelling house. The external wall is a 400 mm concrete block wall with a full-fill insulated cavity. The wall is plastered on bo... show full transcript
Worked Solution & Example Answer:The sketch shows the front door of a dwelling house - Leaving Cert Construction Studies - Question 1 - 2022
Step 1
(a) To a scale of 1:5, draw a vertical section through the external wall, concrete lintels, doorframe and door.
Answer
To complete this section drawing:
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Scale and Setup: Begin by establishing the vertical scale at 1:5. Each 1 cm on your drawing represents 5 cm of actual dimensions.
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External Wall: Draw the 400 mm external concrete block wall. Represent the outer leaf as 100 mm thick, with an insulated cavity of 200 mm and an inner leaf of 100 mm. Illustrate the wall with external render.
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Concrete Lintels and Doorframe: Draw the concrete lintels above the doorframe. Ensure that the doorframe is depicted as 150 mm wide and 80 mm deep, positioned in the wall.
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Door: Illustrate the highly insulated wooden door, which is 90 mm thick with 15 mm vertical sheeting on both sides.
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Dimensions: Add relevant dimensions: 400 mm above and below the lintel, and any additional lengths required to show overall heights.
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Construction Details: Carefully label important elements like the DPC, airtight tape, and cavity closer as per the specifications provided in the marking scheme.
Step 2
(b) On your drawing, show the typical design detailing to ensure that the cavity is closed at the door head.
Answer
To ensure that the cavity is sealed at the door head:
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Cavity Closer: Include a cavity closer detail around the top of the doorframe.
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Sealing Methods: Indicate the use of airtight tape on the internal surfaces to prevent air movement through the cavity.
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Stepped DPC: Represent a stepped damp-proof course (DPC) that extends along the bottom of the doorframe, directing water away from the frame.
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Specifications Compliance: Ensure that all detailing complies with current Building Regulations, commenting in your drawing that alternative detailing is acceptable.