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The 3D graphic on the right shows a birdhouse - Leaving Cert DCG - Question B-3 - 2022
Question B-3
The 3D graphic on the right shows a birdhouse. Fig. B-3 below shows an isometric view of the birdhouse. Note: The hole is not required to be drawn. a) Draw the el... show full transcript
Worked Solution & Example Answer:The 3D graphic on the right shows a birdhouse - Leaving Cert DCG - Question B-3 - 2022
Step 1
Draw the elevation of the birdhouse looking in the direction of the arrow.
Answer
To draw the elevation of the birdhouse:
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Draw Base of Birdhouse:
- Start by sketching a rectangle for the base, which measures 70mm x 55mm as per the isometric view.
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Outline of Top:
- From the top corners of the base rectangle, draw two vertical lines at the respective heights from the isometric view.
- Create a triangular shape for the top, indicating the sloping roof.
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Complete Elevation:
- Add details such as thickness of the walls and any relevant features like the hole outline (if it were to be included).
- Ensure that the elevation perspective matches the indicated direction in the graphic.
Step 2
Project a plan from the elevation.
Answer
To project the plan from the elevation:
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Draw Base:
- Begin with a rectangle as the base of the birdhouse, maintaining the same dimensions used in the elevation.
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Outline of Top:
- Sketch the outline of the roof, using the top edge of the elevation for reference.
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Complete Plan:
- Combine all elements for a comprehensive plan view, making sure to reflect any inclination and relevant features observed in the elevation.
Step 3
Draw the auxiliary elevation of the birdhouse, projected from the plan.
Answer
To draw the auxiliary elevation:
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X1Y1 Line Parallel to Plan of Surface A:
- Draw a horizontal line that is parallel to the base of the birdhouse at the point of surface A, this creates the foundation for projections.
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Projections from Plan:
- Project vertical lines from the plan onto the X1Y1 line representing the heights of relevant features.
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Transfer of Heights from Elevation:
- Measure and transfer the height dimensions from the previously drawn elevation to the auxiliary elevation.
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Draw Surface A:
- Sketch the shape of surface A, making sure it aligns with the projected heights and retains accurate proportions.
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Complete Auxiliary Elevation:
- Bring together all lines and features into a fully structured view of the auxiliary elevation, ensuring that surface A is depicted accurately.
- Maintain neatness and clarity in representation.