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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 a tread and rise of a staircase, the following should be noted:
- Tread: The tread is the horizontal part of the stair where the foot lands. In the drawing, it will be represented as a flat, horizontal rectangle.
- Rise (or riser): The rise is the vertical part that connects one tread to another, represented as a vertical line in the drawing.
A labelled freehand drawing should include both components with clear labels indicating 'Tread' for the horizontal section and 'Rise' or 'Riser' for the vertical section.
Step 2
Name TWO types of roof trusses that do NOT use tie beams.
Answer
Two types of roof trusses that do not use tie beams are:
- Collar-tie roof truss - This type uses collar ties to stabilize the roof structure but does not include tie beams.
- Couple roof truss - This type of truss is characterized by its simple construction that also does not make use of tie beams.
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 this sketch:
- The hoop iron strap should be shown connecting the roof truss to the wall, ensuring it is accurately positioned to illustrate its function.
- Appropriate labels should be included, such as 'Hoop Iron Strap', 'Wall Plate', and 'Wall'. The correctness of joining should also be indicated, ensuring clarity in how these elements work together.
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
To differentiate:
-
South African (Howe) roof truss: This truss has its rafters sloping upwards towards the ridge, with a pronounced king post for added support. In the drawing, attention should be given to the correct representation of the ridge and the connection of rafters to the king post.
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Closed couple roof truss: This design features rafters meeting at a common point at the ridge, usually without a king post. Emphasize the direct connection of rafters at the ridge, showcasing the structural integrity with correct scaling.
Both designs must be rendered in a scale of 1:10, ensuring accurate representation in dimensions and spacing.