Special Public Works Programmes - SPWP - Anti-Erosion Ditches - Training Element and Technical Guide for SPWP Workers, Booklet No. 1 (ILO - UNDP, 84 p.): 4. Worksite organisation: 4.2 Good selection of tools: (introduction...)

Special Public Works Programmes - SPWP - Anti-Erosion Ditches - Training Element and Technical Guide for SPWP Workers, Booklet No. 1 (ILO - UNDP, 84 p.)

4. Worksite organisation

4.2 Good selection of tools

		*(introduction...)*
		4.2.1 Surveying Instruments
		4.2.2 Tools used in the digging of ditches

(introduction...)

Three types of tool are required in the construction of ditches:

- those which are used in the measurement of distance and slope. These tools enable us to determine the right location for the ditch and are known as SURVEYING INSTRUMENTS;
- those needed for the digging of the trench and backfilling of excavated materials;
- those necessary to check the quality of the work.

We will deal with each of these tools in turn, giving a detailed description of its use.