Various options are given as possible answers to the following questions - NSC Civil Technology Construction - Question 6 - 2021 - Paper 1
Question 6
Various options are given as possible answers to the following questions. Choose the answer and write only the letter (A-D) next to the question numbers (6.1.1 to 6.... show full transcript
Worked Solution & Example Answer:Various options are given as possible answers to the following questions - NSC Civil Technology Construction - Question 6 - 2021 - Paper 1
Step 1
6.1.1 A factor to consider when planning a rib and block floor:
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Answer
The correct answer is B. Maximum span. When planning a rib and block floor, considering the maximum span is crucial as it determines the structural integrity and load-bearing capacity of the flooring.
Step 2
6.1.2 A rib and block floor consists of pre-cast ... which is spaced with blocks between them.
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Answer
The correct answer is C. ribs. A rib and block floor consists of pre-cast ribs which are spaced apart, allowing blocks to be laid in between.
Step 3
6.1.3 The final ... in-situ cast concrete slab can only be cast after the installation has been checked by a building inspector.
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Answer
The correct answer is B. 50 mm to 80 mm. This range is a typical minimum thickness for in-situ cast concrete slabs to ensure adequate strength.
Step 4
6.1.4 The temporary props for a rib and block floor can be removed after the concrete slab has reached a crushing strength of ...
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Answer
The correct answer is D. 17 MPa. Removing the props too early can compromise the structural integrity of the slab.
Step 5
6.1.5 An advantage of using rib and block floors:
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Answer
The correct answer is D. A and C are correct. Rib and block floors require minimal forework and do not necessitate skilled labour, making them a cost-effective and efficient building solution.
