Engineering
Comparing Life-Cycle Carbon Footprints of Cast-in-Place vs. Precast Concrete Frames
Quick fact
A life-cycle study of a typical multi-story building found that switching from cast-in-place to precast concrete frames can reduce the building's total carbon footprint by around 15–20%, primarily because precast's controlled manufacturing reduces material waste and uses less cement per cubic meter of concrete—but only if the precast plant is within a reasonable trucking distance.
Why this is interesting
When you pour concrete on-site versus assembling it from factory-made parts, the carbon story is not as simple as it seems—which one actually leaves a smaller carbon footprint?