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3.1 Differentiate, by means of a labelled freehand drawing, between a tread and rise of a staircase - NSC Civil Technology Construction - Question 3 - 2023 - Paper 1
Question 3
3.1 Differentiate, by means of a labelled freehand drawing, between a tread and rise of a staircase. 3.2 Name TWO types of roof trusses that do NOT use tie beams. ... show full transcript
Worked Solution & Example Answer:3.1 Differentiate, by means of a labelled freehand drawing, between a tread and rise of a staircase - NSC Civil Technology Construction - Question 3 - 2023 - Paper 1
Step 1
Differentiate, by means of a labelled freehand drawing, between a tread and rise of a staircase.
Answer
To differentiate between a tread and rise of a staircase, draw a vertical line representing the rise (the vertical part of the step) and a horizontal line representing the tread (the flat part of the step). Label these components clearly. The rise is measured vertically from one step to another, while the tread is the horizontal distance from the edge of one step to the edge of the next.
Step 2
Step 3
Use ANSWER SHEET 3.3 and complete the sketch to show how a roof truss is joined to a wall by using a hoop iron strap. Print any ONE label.
Answer
In the sketch, depict the roof truss intersecting with the wall and secured by hoop iron straps. Label the hoop iron strap clearly, and ensure to illustrate the clout nails attaching the strap to the wall and the tie beam.
Step 4
Use ANSWER SHEET 3.4 and differentiate, according to scale 1 : 10, between the ridge construction of a South African (Howe) roof truss and the ridge construction of a closed couple roof truss.
Answer
On the answer sheet, draw the ridge of each roof truss to scale. For the South African (Howe) roof truss, illustrate the inclined rafters meeting at the ridge beam with vertical king posts. For the closed couple roof truss, show the rafters directly supported by the ridge beam without a king post. Clearly label each component, ensuring the dimensions reflect the 1:10 scale correctly.