Which process shapes the compacted surface to accurate grade and crown specifications?

Which process shapes the compacted surface to accurate grade and crown specifications?

• A. Grubbing
• B. Surface trimming
• C. Grading
• D. Backfilling

Answer: (B)

Surface trimming is the finishing step that shapes the compacted surface to precise grade and crown specifications. After the area has been compacted to the rough grade, small high spots and irregularities often remain. Using a grader blade, you shave down those peaks and bring the surface to the exact elevations and the proper crown, ensuring the drainage pattern and the plan’s tolerances are met. This is the key action that finalizes the surface contour. Grubbing removes vegetation, backfilling adds material, and grading creates the broad shape—but only trimming finishes the surface to the exact grade and crown required.

Surface trimming is the finishing step that shapes the compacted surface to precise grade and crown specifications. After the area has been compacted to the rough grade, small high spots and irregularities often remain. Using a grader blade, you shave down those peaks and bring the surface to the exact elevations and the proper crown, ensuring the drainage pattern and the plan’s tolerances are met. This is the key action that finalizes the surface contour. Grubbing removes vegetation, backfilling adds material, and grading creates the broad shape—but only trimming finishes the surface to the exact grade and crown required.