Fig. 339 shows a section taken vertically through the sill of a double-hung window in a brick wall. A is the stone sill in the outside of the masonry wall, and should be wide enough to extend into the wall and under the wood sill far enough to allow the latter to lap over it about 2 inches. The wood sill, shown at B, is usually made wide enough to receive the staff bead, so that the width of the stone sill needs to be about the same as the depth of the reveal at the jambs, or the stone lintel at the head of the window. The sill B rests, on the inside, on a piece of rough timber built into the wall, as shown at D in the figure. The sill should have a "wash," or slope outward and downward, of about 1.4 inches to the foot. In the figure, C is the lower rail of the lower sash of the window, which must stop against the sill and be made tight in some way.
The figure shows both the sill and the sash rabbeted, but very often the sash is not rabbeted.
The piece E forms the finish on the inside corresponding to the stop bead at the jambs and head, and serves to cover up the rough sill. The piece F also serves the same purpose. L is the rough brick wall with the furring at M and the plastering and lathing at N, and the space between the rough sill and the plastering is covered and finished by the piece G, or the stool. Underneath the stool is placed the apron, as shown in the figure at H.
Outside Door Frames. Outside doors are usually made heavier and thicker than inside doors, and, therefore, the frames for them must be different from the frames for inside doors even in frame buildings, and in buildings of brick or stone they are necessarily different from the inside door frames on account of being set in the masonry walls, while the inside door frames are usually set in wood walls. The interior partitions of large buildings, however, are fre quently made of terra cotta blocks or of plaster on wire lath, but the door frames which may be used in these cases are essentially the same as those used for openings in stud walls.
The jambs and head of the frame, if in a building of wood con struction, are usually made of plank from inches to 21 inches thick. As the doors to private houses generally open inward, the frames must be rabbeted on the inside edge to receive the door, and should also be rabbeted on the outer edge to receive a screen door in summer. The inner edge of the frame is set flush with the plaster line in the inside so as to receive an architrave, the same as in the case of a window frame.
Fig. 340 shows an outside door frame for a wood building. AA are the studs which form the rough opening, the section being taken horizontally through the door jamb. B is the outside boarding and C is the lathing and plastering which is carried on the inside of the studding.
It will be seen that the frame E extends in width from the out side of the boarding to the inside of the plaster, and receives on its outer edge the outside casing F, and on its inner edge the inside archi trave G. D is a ground for the plastering, and H is the door itself, fitting into a rabbet cut in the frame, about 2 inch deep and the thickness of the door. K is the screen door for which a rabbet is cut in the outside edge of the frame.
A similar arrangement is shown in Fig. 341. There is no rabbet cut in the frame shown in this figure, the screen door being designed to hang on the edge of the outside casing, as indicated, the casing being made thicker in order to receive the door. This figure is let tered the same as Fig. 340.
The section taken vertically through the head of the door frame would be the same as the section through the jamb, but the section taken through the sill would be different. Fig. 342 shows such a section. Here, A is the sill which forms a part of the rough fram ing of the building, and rests on the foundation walls, receiving the joists which are shown in the figure at B. L is the line of the outside boarding, C is the under flooring, and D is the finished flooring. On top of the under flooring is placed the door sill E, which is cut out of plank about 11 to inches thick, with a wash on the outside like a window sill, and with the top placed about 4 inch above the fin ished floor so as to allow the door F to swing inward over any rug or carpet which may be laid on this floor. The sill is a little wider than the distance from the inside of the inside architrave, to the outside of the outside casing. The line II is the line of the porch floor, if there is any porch, or there may be a step with the face as indicated by the line K. G represents a screen door.
Fig. 343 shows another type of door sill which is more simple in construction and less expensive than that shown in Fig. 342.
Instead of being shaped to receive the door, as is the sill shown in Fig. 342, it is cut square, with a slight wash only, and on top of it is placed a saddle under the door. In Fig. 343 A is the rough sill of the framework resting on the foundation walls; BB are blocks to receive the ends of the flooring C on top of which is the finished floor ing D. The top of the sill E is flush with the top of this finished flooring, and the saddle M covers the joint between the two, being beveled as shown at both sides. F is the door, and at G is the out side screen door. As before, II is the level of the veranda, if there is one, and K is the face of the riser of a step which may be placed under the sill on the outside. L is the line of the outside boarding.