When setting out the foundation of a building from structural drawings, the first step is to:
Choose the correct answer
Excavate the foundation immediately
Establish a reference point (benchmark) and transfer the building grid to the ground using pegs and a theodolite or total station, checking squareness by measuring diagonals
Lay PCC without marking
Install formwork directly
Correct Answer
B. Establish a reference point (benchmark) and transfer the building grid to the ground using pegs and a theodolite or total station, checking squareness by measuring diagonals
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Setting out sequence: (1) Establish site TBM from nearest GTS BM; (2) Lay out base line parallel to road/boundary; (3) Mark grid points using theodolite/total station; (4) Check squareness (diagonals should be equal for rectangle); (5) Offset pegs for trench edges; (6) Mark depths using batter boards/sight rails.
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