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5.1 FIGURE 5.1 below shows the construction detail at the foot of a centre - NSC Civil Technology Woodworking - Question 5 - 2020 - Paper 1
Question 5
5.1 FIGURE 5.1 below shows the construction detail at the foot of a centre. Identify parts A to E. 5.2 Justify the use of an adjustable steel prop rather than a woo... show full transcript
Worked Solution & Example Answer:5.1 FIGURE 5.1 below shows the construction detail at the foot of a centre - NSC Civil Technology Woodworking - Question 5 - 2020 - Paper 1
Step 1
Step 2
Justify the use of an adjustable steel prop rather than a wooden prop when installing formwork
Answer
An adjustable steel prop is preferred for several reasons:
- Strength: Steel props are stronger than wooden ones, providing better support under heavy loads.
- Adjustability: They are easier to adjust compared to wooden props, allowing for precise height adjustments during installation.
- Accuracy: Steel props provide a more accurate support level, which is essential for structural integrity.
Step 3
Step 4
Step 5
Step 6
Redraw the table below in your ANSWER BOOK and identify TWO possible mistakes in the construction of the dead shore AND recommend possible solutions
Answer
| NO. | MISTAKES IN THE CONSTRUCTION OF THE DEAD SHORE | POSSIBLE SOLUTIONS TO RECTIFY THE MISTAKES |
|---|---|---|
| 1 | The dead shores have no soleplates. | Sole plates should be installed at the bottom of the dead shores. |
| 2 | The needle does not rest properly on the dead shore. | Move the dead shore to the left and ensure the needle is positioned correctly on dead shore. |
Step 7
Differentiate between a couple roof truss and a collar-tie roof truss
Answer
The differences can be illustrated as follows:
Couple Roof Truss
Ridge Beam
/
/ \
/ \
Rafter Rafter
| |
Wall Wall
In this design, there are rafters that meet at the peak, creating a triangle shaped roof structure.
Collar-Tie Roof Truss
Ridge Beam
/
/ \
/ \
Rafter Rafter
| |
Collar Beam
| |
Wall Wall
In this design, there is an additional collar beam that supports the rafters, offering extra strength and stability.
Step 8
Draw a vertical section through the formwork for an in-situ cast concrete floor
Answer
The drawing should include:
- A cross-bearer and bearer to support the formwork.
- The dimensions and proportions must be accurate for the concrete floor's support requirements. Ensure to label all parts correctly in the drawn diagram, maintaining clarity on load distribution.