If there were one word to describe what grade control is all about, it'd be exact.
How it works.
2D or conventional grade control systems are best suited for flat areas or slight grades and use sonic sensors or a laser transmitter and sensor along with machine position sensors to display cut and fill required to maintain grade on a monitor.
With a 3D grade control system, your job's design elevations are input into a control box on your dozer or motor grader. A receiver on your machine reads GPS signals received by an elevated antenna as well as correctional data transmitted by a jobsite base station to calculate an accurate position of the cutting edge. The control box’s computer compares the cutting edge position to the design elevations and then displays cut and fill information for the operator. 3D systems are best for complex contours. Automatic systems for both 2D and 3D systems even adjust the blade for the operator. Both methods allow you to achieve an exact height and exact angle, while using an exact amount of materials and manpower to get the job done.
All of this exactness is driven by an economy where contractor margins have become so thin that anything less than that could cost you profit.
Now you can do the same work you have been doing for years with more speed, fewer passes, and greater accuracy. It literally guarantees that all of the required heights are met to eliminate the risk of overrunning estimated time and costs.
The accuracy of grade control also makes it easier to:
Bottom line…exactness becomes synonymous with profits.
Sample grade control benefit scenario for medium-sized job