'MILANO' SPACECRAFT FROM THE SCI-FI MOVIE 'GUARDIANS OF THE GALAXY'. 1  THE HOLLYWOOD HIT Guardians of the Galaxy was a rip-roaring space opera that punched its way to popularity, and now stands in third place on the Marvel Studios all-time hit list.
Definition of knee wall. : a partition for supporting roof rafters when the span is great or for forming a side wall (as of a second-story room) under a pitched roof.
Building Half Walls. A half wall -- sometimes called a knee wall -- differs from a regular wall in height alone. Technically, a half wall can be any height short of the ceiling; realistically, most half walls are about 3 to 4 feet tall, depending on the wall's purpose and location.