PRELIMINARY WORK

2. A layer of 50 to 75mm thick of weak/lean concrete or coarse sand.
3. Disturbed samples can be obtained by using a rotary flight auger fixed to a tripod.
5. The site contour to consider in selecting a suitable foundation for a building.
6. The base on which a building rests.
10. It is required in the first task of setting out.
11. It should be strong enough to support the load of wet concrete.
12. The last sequence in construction of RC foundation
14. Small concrete ___ as spacer to provide concrete cover to reinforcement.
15. Site ___ is to collect systematically and record data required for the design and construction processes of the proposed work.
16. Placing of concrete by carrying with tower crane
17. Equipment use to check the establishment of a right angle in setting out.
19. The temporary supports to the sides of the excavation.
20. It is constructed with raft foundation of a 4.5m thick and supported by 104 piles varying from 60 to 115m in length.

1. It must have tensile strengt and easily bent to any required shape.
4. Formwork must have grout-tight joints to prevent ____.
7. The removal of topsoil is called ___ excavation.
8. After site clearance and setting out, the contractor shall set up access, security, services, etc.
9. Minimum amount of soil removed is the advantage of this trench excavation.
13. This sheeting is used for trench timbering of loose wet soils.
18. Type of excavation with isolated holes primarily for column stumps, pad footings, pile caps, and basements.