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
Explain 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
Shutter board
Plywood
Step 3
Explain the purpose of folding wedges during the construction of formwork
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Answer
Folding wedges are used to ensure that the components of the formwork stay securely fastened and properly aligned. They help in adjusting the heights and create a leveling effect that prevents any misalignment during the pouring of concrete.
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 is thicker because it must support the weight of the poured concrete and any live loads during the curing process. A thicker board provides greater strength and stability, preventing deflection or failure.
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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A can be used to provide support to brick arches, ensuring that the weight is distributed evenly and preventing collapse.
Step 7
Name ONE other position in which A can be used in laggings
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Openly spaced laggings can be employed where the laggings are not too close to each other, ensuring adequate support and spacing.
Step 8
Explain ONE use of the following shores: Dead shore
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Dead shores are used to carry the dead weight above the dead shores, such as walls and floors. They ensure structural integrity during renovations.
Step 9
Explain ONE use of the following shores: Double-flying shore
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Double flying shores provide temporary support to two parallel walls. They are utilized when one or both of the walls show signs of failure.
Step 10
Describe the function of the following components of a dead shore: Steel dog
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The steel dog is used to secure and connect various components of the dead shore structure, maintaining stability.
Step 11
Describe the function of the following components of a dead shore: Prop/Strut
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Props are used to strengthen or brace floors and ceilings, effectively distributing loads throughout the structure.
Step 12
Describe the function of the following components of a dead shore: Sole plate
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Sole plates spread the weight transferred by props over a wider area and prevent vertical props or pipes 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 angle should be 45°.
Step 14
Draw a neat line diagram of a couple roof truss
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Answer
The drawing should show the span of 3000 mm, wall plates, rafters, a ridge beam, and indicate the slope of the roof as 45°.
