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The sketch shows portion of an external wall, roof and a window of a dwelling house - Leaving Cert Construction Studies - Question 1 - 2010
Question 1
The sketch shows portion of an external wall, roof and a window of a dwelling house. The external wall is a 350 mm concrete block wall with an insulated cavity. The ... show full transcript
Worked Solution & Example Answer:The sketch shows portion of an external wall, roof and a window of a dwelling house - Leaving Cert Construction Studies - Question 1 - 2010
Step 1
To a scale of 1:10, draw a vertical section through the external wall, window and roof structure.
Answer
To draw the vertical section, start by outlining the external wall, indicating that it is a 350 mm concrete block wall with insulation in the cavity. Next, depict the trussed rafters above the wall, making sure to represent the 30-degree pitch of the roof accurately. Include dimensions such as:
- Window frame dimensions: 150 mm x 80 mm fixed frame.
- Height of the window opening: 600 mm.
- External wall thickness: 350 mm.
- Internal span of the house: 6.0 meters.
Ensure clear labels and measurement indicators to illustrate the scale of 1:10 effectively.
Step 2
Indicate clearly on the drawing how the cavity is closed at wallplate level.
Answer
The cavity at the wallplate level can be represented by showing the wallplate, which typically measures 100 mm x 75 mm. It should bridge the gap between the inner and outer walls of the cavity. Use a dashed line or light shading to indicate insulation material that fills the cavity at this level. Furthermore, detail the connections to the rafters and ensure that it reflects how the roof structure maintains continuity while preventing moisture ingress into the cavity.