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Differentiating, 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
Differentiating, by means of a labelled freehand drawing, between a tread and rise of a staircase. Name TWO types of roof trusses that do NOT use tie beams. Use AN... show full transcript
Worked Solution & Example Answer:Differentiating, 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 the tread and rise of a staircase, a labelled freehand drawing should be created. The drawing should clearly depict the following:
- Tread: This is the horizontal part where one steps. It should be labelled and the measurement indicated.
- Rise: This is the vertical part between each tread where the height is measured. It should also be labelled appropriately.
An example diagram can include arrows pointing to each section with their respective labels to enhance clarity.
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
The sketch should illustrate the connection of a roof truss to a wall using a hoop iron strap. Key elements to include in the drawing:
- Wall Plate: This is the horizontal structure at the top of the wall to which the roof truss is attached.
- Hoop Iron Strap: This is a metallic strap used to secure the truss to the wall, enhancing stability.
- Clout Nails: Indicate where nails are used to secure the hoop iron strap to both the truss and the wall.
- Label: Print clearly the label 'Hoop Iron Strap' next to the illustration of the strap.
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
In this part, the sketch should represent both types of roof truss ridge constructions to highlight their differences. Important elements include:
- South African (Howe) Roof Truss: Illustrate the unique features of this truss, such as its king post and how the rafters connect to the ridge.
- Closed Couple Roof Truss: Depict the simplicity of this design showing how rafters meet at the ridge without additional support.
- Clearly indicate the scale of 1:10 and ensure measurements are labeled for ease of understanding. Also, make sure to note that the pitch of the roofs is 30° for both designs.