Page 33 - Interactive report Ar Site Practice

3.1.2

Earthworks

Incentives such as task work the volumes of earth to be excavated have to be measured and
calculated accurately. There are basically two ways of accurately determining the volumes to be
excavated: using the traditional way of measuring the levels with a levelling instrument and
drawing the cross-section to scale. The volume can then be calculated; using the slotting
technique which enables the measurements to be taken with a ruler or tape on the cut itself

Levelling

A builder's level is used in the construction field to set up level points and to check
elevations. Also called a "dumpy" level, the builder's level is inexpensive, easy to
assemble, easy to use and lightweight. There are many parts to a builder's level, but
it is primarily a leveling vial attached to a telescope. In surveying, levelling is a
process of determining the height of one point (or level) relative to another. It is
used in surveying to establish the elevation of a point relative to a datum, or to
establish a point at a given elevation relative to a datum.