Heavy equipment refers to heavy-duty vehicles,

specially designed for executing construction tasks,

most frequently ones involving earthwork operations.

They are also known as heavy machines, heavy trucks,

 construction equipment, engineering equipment, 

heavy vehicles, or heavy hydraulics.

They usually comprise five equipment systems

: implement, traction, structure, 

power train, control and information.

[1] Heavy equipment functions through the mechanical advantage of a simple machine,

the ratio between input force applied and force exerted is multiplied.

Some equipment uses hydraulic drives as a primary source of motion...

Magnitude & Complexity of the Project .

Projects involving large quantities of material handling. .Complexity of Projects using high grade materials . High quality standards .

Importance of keeping the Time Schedules. Optimum use of Material, Manpower and Finance. Shortage of skilled and efficient Manpower.

Proper use of appropriate equipment contributes to Economy, Quality, Safety, Speed and Timely completion of the Project. Construction equipment is an important part of any construction