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On ANSWER SHEET 6.2, draw to scale 1 : 20 a vertical sectional view on section line B–B to show the top part of the superstructure wall and a little more than half of the SA (Howe) roof truss with closed eaves and an overhang of 500 mm - NSC Civil Technology Construction - Question 6 - 2017 - Paper 1
Question 6
On ANSWER SHEET 6.2, draw to scale 1 : 20 a vertical sectional view on section line B–B to show the top part of the superstructure wall and a little more than half o... show full transcript
Worked Solution & Example Answer:On ANSWER SHEET 6.2, draw to scale 1 : 20 a vertical sectional view on section line B–B to show the top part of the superstructure wall and a little more than half of the SA (Howe) roof truss with closed eaves and an overhang of 500 mm - NSC Civil Technology Construction - Question 6 - 2017 - Paper 1
Step 1
Draw to scale 1:20 a vertical sectional view on section line B–B
Answer
Begin by setting your scale to 1:20 on your drawing instrument. Use section line B–B from Figure 6.2 as the reference point to establish the vertical sectional view.
Indicate the superstructure wall which is 220 mm thick, ensuring to show the plastering on both sides (20 mm thick). Integrate the wall plate (114 mm x 38 mm) into the drawing near the top of the wall.
Step 2
Show the roof truss with closed eaves
Answer
Illustrate the SA (Howe) roof truss above the wall. Use appropriate dimensions for the rafters (38 mm x 38 mm) and tie beam (114 mm x 38 mm). Ensure the slope of the roof is accurately depicted at 30°.
Include details of the king post and queen post (both 114 mm x 38 mm) within the truss structure.
Step 3
Include the overhang and labels
Answer
Depict the overhang of 500 mm at the eaves in your drawing. Clearly label the following components:
- Closed eaves: Indicating continuity of the eaves without openings.
- Hangers: 38 mm x 38 mm, showing how the rafters connect to the wall.
- Bearers: 38 mm x 38 mm, supporting the rafters. Include at least three labels in your drawing as required.