FIGURE 5.1 below shows a vertical sectional view through formwork for two concrete beams - NSC Civil Technology Woodworking - Question 5 - 2018 - Paper 1
Question 5
FIGURE 5.1 below shows a vertical sectional view through formwork for two concrete beams. Study FIGURE 5.1 and identify members A to D. Write only the answer next to... show full transcript
Worked Solution & Example Answer:FIGURE 5.1 below shows a vertical sectional view through formwork for two concrete beams - NSC Civil Technology Woodworking - Question 5 - 2018 - Paper 1
Step 1
Identify members A to D
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Answer
A - Concrete beam/Concrete
B - Brace/Strut
C - Prop/Adjustable prop
D - Sole plate
Step 2
Recommend FOUR wooden board products that can be used as sides for formwork
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Answer
Block board
Laminated board
Plywood
Shutter board
Step 3
Explain the purpose of folding wedges during the construction of formwork
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Answer
Folding wedges serve multiple functions in formwork construction:
They stabilize various components, ensuring everything remains secure and aligned during the setting process.
They assist in lowering and raising the formwork, making adjustments simpler and more precise.
They help level the formwork, ensuring that the concrete sets evenly to achieve the desired structural integrity.
Step 4
Explain the reason why the bottom soffit board in the construction of formwork for a concrete beam is thicker than the sides of the formwork
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The bottom soffit board in the construction of formwork is thicker than the sides to provide added strength and support. This component bears the weight of the fresh concrete while it is curing, preventing sagging or deformation. A thicker board helps distribute the load more evenly and reduces the risk of failure during the pouring process.
Step 5
Identify parts A to C in FIGURE 5.5
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A - Lagging
B - Ribs
C - Bearer
Step 6
Explain ONE use of A if it is used in a closed position, as shown in FIGURE 5.5
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When A (lagging) is used in a closed position, it acts as a support structure for the beams, helping to maintain stability and alignment while the concrete sets.
Step 7
Name ONE other position in which A can be used in laggings
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Lagging can also be used in open laggings, where it provides support between spaced beams or joists, ensuring structural integrity.
Step 8
Explain ONE use of DEAD shore
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Dead shores carry dead weight above the dead shores, such as walls and floors, transferring the weight to the ground to support structures during construction.
Step 9
Explain ONE use of DOUBLE-flying shore
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Double flying shores provide temporary support to two parallel walls, especially when one or both walls show signs of failure, ensuring stability during construction.
Step 10
Describe the function of STEEL dog
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The steel dog is used to secure the joint between prop and the dead shore, ensuring structural integrity.
Step 11
Describe the function of PROP/STRUT
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Props are implemented to strengthen or brace the floors and ceiling, distributing loads effectively.
Step 12
Describe the function of SOLE plate
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Sole plates spread the weight transferred by the props over a wider area, preventing vertical props from sinking into the ground.
Step 13
At what angle must the braces above and beneath the horizontal shores be placed on a double-flying shore?
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The braces must be placed at an angle of 45°.
Step 14
Draw a neat line diagram of a couple roof truss
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