Making and Excavating the Foundation
- Ensure correct marking of the foundations for new walls so that they are the right size and in the right position to bear the weight of the wall.
- Obtain the layout plan/centre-line drawing from the engineer and establish the centre-line of the longest outer wall of the building as a reference line between the pegs driven into the ground.
- Mark all trench excavation lines with respect to the centre lines of walls.
- Ensure that the excavation done is true to levels, slope, shape and pattern.
- Consolidate the bed of excavation by watering and ramming. Soft or defective spots should be dug out and filled with concrete.
- Brace the sides of deep excavations with tight shoring work to avoid collapsing of the sides of the excavation area.