When dentils and modillions are introduced in the cornice they are invariably repeated in the mouldings of the pediment.
The tympanum or face of the pediment should be in vertical alignment with the face of the frieze. When this space is small it is best left plain, but on a large scale the tympanum affords a very suitable position in which to place sculpture.
The height of the pediment varies according to the width. Thus where the base is short, as in door and window heads, it will be comparatively higher than when used in a façade. The height may vary from a fourth to a fifth of the width of the base.
Doors
Obviously door openings should be of sufficient size to admit the free passage of a tall person. The minimum height for ordinary doors in domestic buildings should be six feet nine inches, and the width two feet nine inches. For entrance doors under similar conditions the width may be three feet six, but when it is more than this the door should be in two halves.
No. 182. General proportions of doors and windows.
The size of doors should be proportioned to the building, and should be designed to meet probable requirements, thus in public buildings door openings should not be less than six feet wide.
Generally a satisfactory proportion may be obtained by making the height twice the width, and the framing architrave one-sixth the width of the opening.