If you have crawl spaces, make sure that there is at least 18 inches clearance between the horizontal timbers and the ground.

As the men in the engine room dodged these hazards, the Shoshone ran through a passage so narrow that there were only a few inches clearance between the rock walls on both sides of the vessel.

If she just supports her own weight at nine inches clearance, then at three inches the repulsion would be twenty-seven times her weight and at an inch it would be seven hundred and twenty-nine, and at a quarter of an inch--" "Don't even think about it.

Most garage door openers require between 1 1/2 and 3 inches clearance.

"Six inches clearance, tested."

There was no more than a few inches clearance between their knees as they passed, but they would not rein aside.

These doors, when opening, only require 11 inches (264 mm) clearance outside the line of the car, making opening and closing the doors in crowded spaces relatively easy.