I've found that it's best to situate the "recess can" downwind of the playground, but not far from the swingset, so that in an emergency situation a pupil can utilize it without offending fellow playmates. The spring-loaded door obviates the need for deployng the old-style batwing screening device.
OK, I'll admit that I'm not totally clear on the question and I may have strayed from your inteneded meaning -perhaps you could add a little information on the obsure (to me) terminology.