This section is from the book "Cyclopedia Of Architecture, Carpentry, And Building", by James C. et al. Also available from Amazon: Cyclopedia Of Architecture, Carpentry And Building.
Another common form of eave provides a concealed gutter. In this construction the ceiling joists are extended beyond the outside walls and the rafters are cut to set over the plate. The cornice and gutter are illustrated in Fig. 286. The studding is shown at S, and on the plate P the joists C extend over from 8 to 14 inches, depending on the effect desired. Around the joist the planceer Q, the fascia J, the bed N, and crown molding M are fixed. A notch 0 is cut in the joist and a 7/8-inch piece is nailed in this notch and on the outer end. Tin or copper is used to conduct the water over the gutter. The tin should be nailed to the crown molding and should be run 8 or 10 inches above the shingle line.