In simple words, transforming the drawing to the site with reference points for executing the same. Usually reference lines are made and the footing locations are set out for excavation. Key point to note and check at this stage is to check for diagonal measurements and ninety degree or shapes as per drawing at corners and outline measurements.
EXCAVATION:
Depending upon the scale and location and structural requirement excavation by means of equipment or manual can be chosen.
Manual excavation is more precise when compared to machine for residential projects at small scale, but cost and time is higher.
Machine excavation is little shabby and shaping of the boundary to be done manually but its cheap and can be done within matter of hours when compared to manual excavation.
Things to be noted are shape, depth and in line with other elements and most important all footings to be at same level. If soil is very moist or water table is shallow, have De-watering pumps handy to avoid ponding and damaging the sides of the pit.
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