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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 a rise of a staircase, a well-labelled drawing should depict the following:
- Tread: This refers to the horizontal part of the staircase that you step on. It should be illustrated with a clear width.
- Rise/Riser: This is the vertical portion of a step that connects two successive treads. It should be labelled as the height of the step.
Both components should be clearly labelled in the drawing to ensure clarity.
Step 2
Name TWO types of roof trusses that do NOT use tie beams.
Answer
- Collar-tie roof truss: This type uses a horizontal member that ties together the two rafters at a designated height to prevent them from spreading.
- Couple roof truss: This configuration consists of two inclined members that meet at the ridge and are not supported by a tie beam.
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 on ANSWER SHEET 3.3, clearly depict the connection between the roof truss and the wall, highlighting the use of a hoop iron strap. Show the strap wrapped around the wall plate to reinforce the joint, ensuring to label the key components such as the wall, truss, hoop iron strap, and clout nails to provide a comprehensive understanding of the joinery.
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 ANSWER SHEET 3.4, illustrate the following:
- South African (Howe) Roof Truss: Detail the ridge beam and its connection points, ensuring to include features like rafters that support the ridge.
- Closed Couple Roof Truss: Show how the rafters meet directly at the ridge without a ridge beam, indicating the structural differences.
Both diagrams should be drawn to scale (1:10) and neatly labelled to distinguish the two constructions.