How to stagger plank end joints — random offset ≥6″ vs. H-joints and stair-steps

What this diagram shows

A top-down view of racked plank rows compares a correct layout with two common mistakes. The correct layout uses a random stagger, with the end joints where planks butt together offset at least 6 inches from the joints in the rows beside them, so the floor is strong and looks natural. The first mistake is H-joints, where the end joints in adjacent rows line up vertically, creating a weak line that telegraphs through the floor. The second mistake is a repeating stair-step, where each row’s joint shifts by the same amount, forming a regular diagonal that reads as a defect.