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The graphic on the right shows steps and portion of a wall - Leaving Cert DCG - Question B-3 - 2019
Question B-3
The graphic on the right shows steps and portion of a wall. Fig. B-3 below shows an isometric view of a similar structure. (a) Draw the elevation of the complete s... show full transcript
Worked Solution & Example Answer:The graphic on the right shows steps and portion of a wall - Leaving Cert DCG - Question B-3 - 2019
Step 1
(a) Draw the elevation of the complete structure looking in the direction of the arrow.
Answer
To draw the elevation:
- Start by establishing the height of the steps based on the dimensions given in the isometric view in Fig. B-3.
- Draw the vertical outline of the wall, ensuring it aligns with the steps.
- Add the individual steps at their respective heights, maintaining the correct angles as seen from the provided view.
- Ensure all dimensions such as width and height correspond correctly with the measurements given in the figure.
Step 2
(b) Project a plan from the elevation.
Answer
To project the plan:
- Using the elevation drawn, project horizontal lines from key points, particularly the top surfaces of each step.
- Mark the outline of the wall in a plan view.
- Indicate the position of each step as it would be viewed from above, ensuring to maintain the exact dimensions as depicted in the elevation.
- Label the plan with relevant measurements to clearly indicate the structure's layout.
Step 3
(c) Draw the auxiliary elevation of the structure, projected from the plan, which will include the true shape of surface A.
Answer
To draw the auxiliary elevation:
- Identify surface A from the plan and project its location.
- Use parallel lines from points X and Y as indicated in the marking scheme to establish the correct perspective.
- Transfer the heights of the steps from the elevation to this new perspective to show surface A accurately.
- Draw the outline for surface A, ensuring it's correctly shaped and includes all dimensions as seen from the auxiliary view.
- Complete the auxiliary elevation by adding any additional features visible in the elevation.