Get Your 3D Grading Under Control: 4 Site Control Principles Every GPS Contractor Needs to Know
Poor site control is the number one problem we see from contractors running GPS machine control. Not bad models or broken equipment. Site control, the first step on every single project. We've seen it cost contractors two weeks of production, turn a correct machine control model on a balanced site into a mysterious site export, and force concrete footings to be redone because the control was rotated 2.8 degrees. Every one of those situations was avoidable.
Why Subgrade Machine Control Models May Not Be the Best Choice for Your Project
Most contractors default to subgrade models without thinking twice. After building 20,000+ GPS models, our team has learned that's usually the wrong call. Subgrade offsets create plan mismatches, slow revision turnaround, and add cost without much upside. Finish grade matches what's on the plans and keeps your crew and PM on the same page. Here's when subgrade actually makes sense.
