excavation

1. Excavation topsoil for preservation average 150mm deep .
2. Deposit preservation top soil in temporary spoil heap average 10m distance .
3. Excavation over site to formation level maximum depth not exceeding 250mm
4. Excavation pit to receive column bases starting from formation level having both plan dimension less than 1.25m maximum depth not exceeding 1.00m ( In no 12 ) .
5. Excavation pit to reveive column bases starting from formation level having both plan dimension not less than 1.25m maximum depth not exceeding 2.00m
6. Extra over pit excavation to excavating in rock ( provisional )
7. Excavating trenches to receive ground beam starting from formation level maximum depth not exceeding 0.25m
8.Extra over trenches excavationg for excavating in rock ( provisional )
9. Aloow for keeping surface of site and whole excavation free of surface water by means of pumping or otherwise ( provisional )
10. Filling to make up level not exceeding 250mm thick , material to be obtained off site , hardcore of clean hard broken stones specified , average 150mm thick .
11. Filling to make up level exceeding 250mm thick , material to be obtained off site hardcore of clean hard broken stones as specified .
12. Layer of polythene sheet as specified horizontal damp proof membrane , 125mm thick well lapped at joint laid on hardcore ( measured net - no allowance made for laps ) .
13. Remove excavated material from site .
14. Filling to excavation with material arising from excavation .