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A four-panel wooden door is fixed in the external wall of a two storey timber-frame house, as shown in the sketch - Leaving Cert Construction Studies - Question 7 - 2007
Question 7
A four-panel wooden door is fixed in the external wall of a two storey timber-frame house, as shown in the sketch. The external wall, which supports the first floor ... show full transcript
Worked Solution & Example Answer:A four-panel wooden door is fixed in the external wall of a two storey timber-frame house, as shown in the sketch - Leaving Cert Construction Studies - Question 7 - 2007
Step 1
Draw a vertical section through the external wall, door and floor joists
Answer
Start by setting your drawing scale to 1:10. Create a vertical section that includes:
- External Wall: Represent a concrete block outer leaf, typically 100 mm thick, with external render.
- Door: Illustrate the four-panel door fixed within a door frame. Ensure to include dimensions for clarity.
- Door Frame: Detail the frame that supports the door panels, positioning it accurately.
- First Floor Joists: Show the joists clearly supporting the structure above. Dimensions for joists should typically be around 225 mm x 50 mm.
In your sketch, clearly label each component and dimension based on the constraints outlined in the question.
Step 2
Indicate the typical dimensions of four main structural members
Answer
Include dimensions for the following structural members:
- Concrete Block: 100 mm thick.
- Door Frame: Width specifications can be indicated, typically 90 mm for vertical studs.
- First Floor Joists: Typical dimensions 225 mm x 50 mm.
- Timber Studs: Indicate as 90 mm x 45 mm vertically for the framing.
The details provided should adequately communicate the construction techniques and dimensions relevant to this structure.
Step 3
On the drawing, show clearly how the first floor joists are supported at the timber-frame inner leaf of the external wall
Answer
Depict how the first floor joists are supported by the timber-frame inner leaf:
- Joists Supported: Illustrate that the joists rest on a solid upper plate, providing structural stability.
- Timber Frame: Show the inner leaf framing, typically featuring vertical studs and horizontal rails. Dimensions of the studs should be noted as roughly 90 mm x 45 mm.
- Cross Section: Include a cross-section view showing the support detail under the joists, also illustrating elements such as the vapor check and internal lining above. Ensure all supports and connections are clearly marked on the drawing.