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The concrete work for the following part of the building of specified thickness is measured in square meters
Answer & Solution
Correct Answer:
Option
D
The question asks: When do we measure concrete work in square meters (m²) for a part of a building if it has a "specified thickness"?
Normally, concrete is measured in cubic meters (m³) because it's a 3D material (length x width x thickness). But sometimes, when the concrete part is like a flat sheet (very wide and long, but relatively thin) and its thickness is already decided and fixed (for example, 10 cm or 15 cm), it's easier and standard practice in civil engineering to measure just its area in square meters (m²). This is common for thin, flat concrete structures.
Let's look at the options:
Option A: Roof slabs
Roof slabs are flat concrete sheets that form the roof of a building. They always have a specified thickness (e.g., 125 mm or 150 mm). Since they are thin and cover a large area, their concrete work is typically measured by their area in square meters (m²).
Option B: Floors
Similar to roof slabs, floor slabs (like the ground floor or upper floors) are also flat concrete surfaces with a specified thickness. For example, a 100 mm thick floor slab. Therefore, the concrete for floors is also measured by its area in square meters (m²).
Option C: Wall panels
Concrete wall panels, especially precast ones or thin dividing walls, also come with a specified thickness. If you have a concrete wall that is, say, 150 mm thick throughout, its concrete work will be measured by its area (height x length) in square meters (m²).
Since all these parts of a building (roof slabs, floors, and wall panels) are relatively thin, cover a large area, and have a specified and uniform thickness, their concrete work is measured in square meters (m²) for estimation and costing purposes.
Therefore, the correct answer is Option D: All the above.
Key takeaway: When concrete elements are flat, cover a large area, and have a clearly specified and constant thickness, they are measured in square meters (m²) for simplicity and standard practice in estimating and costing.
Normally, concrete is measured in cubic meters (m³) because it's a 3D material (length x width x thickness). But sometimes, when the concrete part is like a flat sheet (very wide and long, but relatively thin) and its thickness is already decided and fixed (for example, 10 cm or 15 cm), it's easier and standard practice in civil engineering to measure just its area in square meters (m²). This is common for thin, flat concrete structures.
Let's look at the options:
Option A: Roof slabs
Roof slabs are flat concrete sheets that form the roof of a building. They always have a specified thickness (e.g., 125 mm or 150 mm). Since they are thin and cover a large area, their concrete work is typically measured by their area in square meters (m²).
Option B: Floors
Similar to roof slabs, floor slabs (like the ground floor or upper floors) are also flat concrete surfaces with a specified thickness. For example, a 100 mm thick floor slab. Therefore, the concrete for floors is also measured by its area in square meters (m²).
Option C: Wall panels
Concrete wall panels, especially precast ones or thin dividing walls, also come with a specified thickness. If you have a concrete wall that is, say, 150 mm thick throughout, its concrete work will be measured by its area (height x length) in square meters (m²).
Since all these parts of a building (roof slabs, floors, and wall panels) are relatively thin, cover a large area, and have a specified and uniform thickness, their concrete work is measured in square meters (m²) for estimation and costing purposes.
Therefore, the correct answer is Option D: All the above.
Key takeaway: When concrete elements are flat, cover a large area, and have a clearly specified and constant thickness, they are measured in square meters (m²) for simplicity and standard practice in estimating and costing.
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