Bed molding ? a narrow molding used at the junction of a wall and ceiling.Bed moldings can be either sprung or plain. Bolection ? a molding which is raised, projecting proud of the face frame.
It is located at the intersection of the different surface levels between the frame and inset panel on a door or wood panel.It will sometimes have a rebate (or rabbet) at the back, the depth of the difference in levels, so that it can lay over the front of both the face frame and the inset panel and can in some instances thus give more space to nail the molding to the frame, leaving the inset panel free to expand or contract in varying climates, as timber is prone to do. Cable molding or ropework ? Convex molding carved in imitation of a twisted rope or cord, and used for decorative moldings of the Romanesque style in England, France and Spain and adapted for 18th-century silver and furniture design (Thomas Sheraton)3 Cabled fluting or cable ? Convex circular molding sunk in the concave fluting of a classic column, and rising about one-third of the height of the shaft2 Casing ? Final trim or finished frame around the top, and both sides of a door or window opening Cartouche (French) escutcheon ? framed panel in the form of a scroll with an inscribed centre, or surrounded by compound moldings decorated with floral motifs Cavetto ? (Italian) cavare: "to hollow", concave, quarter-round molding sometimes employed in the place of the cymatium of a cornice, as in the Doric order of the Theatre of Marcellus.
Ceilings are classified according to their appearance or construction.
This may be done for aesthetic purposes, such as achieving a desirable ceiling height; or practical purposes such as acoustic damping or providing a space for HVAC or piping.
An inverse of this would be a raised floor.
A concave or barrel-shaped ceiling is curved or rounded upward, usually for visual or acoustical value, while a coffered ceiling is divided into a grid of recessed square or octagonal panels, also called a "lacunar ceiling".A cove ceiling uses a curved plaster transition between wall and ceiling; it is named for cove molding, a molding with a concave curve.1 A stretched ceiling (or stretch ceiling) uses a number of individual panels using material such as PVC fixed to a permieter rail. Źródło: https://en.wikipedia.org/wiki/Ceiling#Types.