Photo AI
The 3D graphic on the right shows a model of a greenhouse with a compost bin attached - Leaving Cert DCG - Question B-2 - 2010
Question B-2
The 3D graphic on the right shows a model of a greenhouse with a compost bin attached. Fig. B-2 shows the plan and elevation of the greenhouse and the bin. (a) Dra... show full transcript
Worked Solution & Example Answer:The 3D graphic on the right shows a model of a greenhouse with a compost bin attached - Leaving Cert DCG - Question B-2 - 2010
Step 1
Draw the given plan and elevation.
Answer
-
Plan of Greenhouse: Begin by sketching a rectangle that represents the base of the greenhouse measuring 80 units in width and 60 units in depth. The top will feature a triangular peak at the center, creating a pitched roof with a height that meets at a 30-degree angle from the horizontal.
-
Plan of Compost Bin: Draw a smaller rectangular shape adjacent to the greenhouse, measuring 40 units in width and 30 units in depth. The shape should align with the edges of the greenhouse, maintaining a flat top.
-
Elevation of Greenhouse: From the plan, create an elevation showing the front view of the greenhouse. Extend the height to meet the peaks clearly marked by the angles. The elevation height should represent the maximum height of the pitched roof.
-
Elevation of Compost Bin: Create a side elevation of the compost bin, showcasing its straightforward rectangular structure while depicting the height appropriately above the base.
Step 2
Draw an auxiliary elevation of the greenhouse and compost bin, projected from the plan.
Answer
-
X1Y1 Line: Start by drawing a horizontal line, I1Y1, parallel to the plan of surface A. This line will be the basis for the projections.
-
Projections from Plan: Project vertical lines from key points in the plan, such as the edges of the greenhouse and the compost bin, down to the X1Y1 line.
-
Transfer Heights from Elevation: Utilize the previously drawn elevations to transfer the heights accurately onto the auxiliary elevation. Ensure all key height measurements from the elevation are clearly marked on this line.
-
Draw Surface A: Indicate surface A of the compost bin by connecting the appropriate points that have been transferred from the plan and elevation. This creates the true shape of surface A.
-
Complete Auxiliary Elevation: Finalize the drawing by completing any additional lines that outline the complete auxiliary elevation of both structures, ensuring all dimensions and angles are accurately represented.
-
Presentation: Ensure clarity and proper representation of the lines, utilizing different line styles where necessary to differentiate between visible and hidden edges.