Earth work may be either earth excavation or earth filling or Sometimes both. Basically the volume of earthwork is computed from length, breadth, and depth of excavation or filling. However the payment for the earthwork is made according to this volume as well as the lead and lift with regard to area of disposal.
Lead is the average horizontal distance b/w site of earthwork and the area of disposal. The lead is generally measured in terms of 30 m distances.
Lift is the average vertical distance b/w level of excavation and to the place of spreading or heaping. The unit of lift is 1.5 m for first lift and one extra lift for every 1.0 m.
For example, when earth is to be lifted for 4 m, four lifts are to be paid to the contractor.i.e.
– Upto 1.5 – 1 lift
– 1.0 – 1 Lift
– 1.0 – 1 lift
– 0.5 – 1 lift