![]() Maximum of 4 and minimum of 2 benchmarks are marked in the corner for the measurement of level.on the ground before the excavation is started. Setting out or ground tracing is the process of laying down the excavation lines and centre lines etc.The first and primary step involved in the excavation is to find out the extent of soil and Clearing of construction site is of unwanted bushes, weeds and plants.Constructing protection bunds and drains.Constructing dewatering wells and interconnecting trenches.The major works done before, while and after excavation are as follows, Excavation line is marked in dotted line. These grid lines are so aligned that the line falls on the excavation and footing.Įxcavation drawing represents the length, width and depth of the excavation. Gridline drawings represents the grids marked in numbers and alphabets whose measurements are shown for site marking out reference. Centerline Drawing or Gridline Drawingĭrawings Required for Excavation 1.
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