I work in the construction industry, and it remains virtually 100% standard English units. If there are any exceptions, I can't think of any right off the top of my head. Excavating firms move soil to the tune of however-many cubic yards, and concrete is likewise ordered in cubic yards. Structural and architectural drawings are in feet and inches. Structural steel (such as I-beams) are specified according to size (in inches) and weight (in pounds) per linear foot. Rebar is sized in "eighths" (meaning a #5 rebar is 5/8" in diameter) but some manufacturers also mark it in millimeters. The asphalt pavement section in front of my house was placed however-many inches thick, it was mixed at 300 or so degrees F and the gravel aggregate it was made from was sized according to sieves measured in fractions of inches. Etc, etc.