41.   None of the rooms connected one with the other, entry being via a door off the corridor, and often as not, this door had a screen.

42.   One-piece doors have two tracks hanging from the ceiling joists.

43.   Or the bathroom door may have a ledge.

44.   Ragel contended the door would have to be open to expose all four of the stains depicted in a photo.

45.   Sectional garage doors have more complex mechanisms than one-piece units, but both models require periodic servicing.

46.   Section doors also have two overhead tracks, but these curve down into vertical tracks on either side of the door opening.

47.   Since hollow doors have thin panels of wood covering the hollow core, you will have to choose a molly anchor made especially for hollow-doors.

48.   Some doors also have a pressure sensor, another valuable safety device.

49.   Some doors have signs warning of booby traps.

50.   Such doors usually have a framework of pine or other wood around the edges, and the center part of the door is hollow.