Cornice. Cornices are generally classified as open or skeleton, and box, Figs. 95 and 96. Each of these types will be found constructed in almost endless variety of forms. The illustrations shown will serve the purposes of this text. The student should familiarize himself with the various common forms, details of which may be got from any good, modern book on building details.
Fig. 95. Skeleton Cornice.
Fig. 96. Box Cornice.
In making the various cuts on cornice work, a miter-box must be available for mouldings. The old type of wood miter box, with the various necessary cuts laid out in its sides is satisfactory. Some experimenting will be necessary upon the part of the beginner to determine the manner of placing the moulding in the box to give the correct cut.
The cuts for the plancher, which rests in the planes of a hipped roof and which must be membered around a corner are determined in a manner similar to that described for roof boards, Sec. 49, from the cuts of the jack rafter cheeks.
Fig. 97a. Skeleton Cornice.
Fig. 97-b. Box Cornice..
Fig. 97 illustrates the manner of "framing in" the lookouts on gables where a skeleton cornice is used. Also there is illustrated the manner of placing lookouts in gables for a box cornice. Unless the cornice is quite wide, these blocks are merely fastened to the underside of the roof boards at intervals of 3 or 4 feet. The depth of these blocks will depend upon the manner of framing the tail ends of the rafters.
Metallic gutters made to assume the form of the crown mould, no wood crown mould being used, will be found in common use upon ordinary house construction. A fall of ½ inch to every 10 feet is usually given gutters.