Forget off-the-shelf hinges and latches. In modular construction, the real challenge isn’t the building design—it’s the millimeter-level mismatch between factory-produced modules and field-installed hardware. Drawing from a $50M high-rise hotel project, this article reveals how tailored building hardware solved a catastrophic alignment crisis, slashing rework by 35% and shaving three weeks off the schedule. You’ll learn the specific design principles and data-driven strategies that make custom hardware a non-negotiable for high-volume modular builds.