The graphic below shows the Derry Peace Bridge,
which contains two inclined pylons supporting the cable structure - Leaving Cert DCG - Question A-4 - 2015
Question A-4
The graphic below shows the Derry Peace Bridge,
which contains two inclined pylons supporting the cable structure.
The two pylons are represented by the skew lines ... show full transcript
Worked Solution & Example Answer:The graphic below shows the Derry Peace Bridge,
which contains two inclined pylons supporting the cable structure - Leaving Cert DCG - Question A-4 - 2015
Step 1
Creating a plane containing CD (or AB) and parallel to AB (or CD)
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
To start the projection process, create a plane that contains one of the skew lines (for instance, line CD) and is parallel to either AB or CD. This will help visualize the intersection of the lines and establish a foundational reference for the projection.
Step 2
Elevation and plan of horizontal line between parallel line
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Next, draw the elevation and plan of the horizontal line that connects projections of points B and D. It's essential to represent this line maintaining the angles that reflect the true physical relationship in the overall structure.
Step 3
XY1 perpendicular to plan of horizontal line
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Now, construct line XY1 that is perpendicular to the plan of the horizontal line, ensuring that the true lengths and angles are preserved. This step is crucial to identifying the exact locations of points A and Y on the elevation.
Step 4
Projections of lines in 1st auxiliary elevation
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
After establishing XY1, proceed to project points A and B in the first auxiliary elevation parallel to line XY. This allows for a clearer understanding of how these points relate spatially to one another.
Step 5
XY2 perpendicular to XY1
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
From there, draw line XY2 perpendicular to XY1. This intersection creates a new perspective of the overall structure and aids in finding the shortest distance between the two skew lines.
Step 6
Identification of shortest horizontal distance in 2nd auxiliary
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Identify the shortest horizontal distance in the second auxiliary view, ensuring that your markers indicate the relationship between the horizontal line and the skew lines.
Step 7
Draw required projections (projecting or measuring to plan and elevation)
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Finally, draw the necessary projections to represent the lines accurately in both plan and elevation views, making sure to label and highlight all critical measurements.
Step 8
Extend line to meet V.P.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Extend the line to meet the vertical plane (V.P.), ensuring that its endpoint is clearly marked in relation to the other lines in the image.
Step 9
Indicate required angle
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Indicate the required angle between the horizontal line and the vertical plane in degrees, using a protractor or angle measuring tool for accuracy.
Join the Leaving Cert students using SimpleStudy...
