Most frames are made at the planing mills, but when it is more convenient to build them, the following suggestions will be helpful. For a door or window, rabbet across the side jambs 3/8" for the head jamb and sill. Cut the head jamb and sill 3/4" longer than the width of sash or door, for the gain or rabbet in the jambs. (Fig. 46.)

Fig. 46

Fig. 47

The jamb must be made wide enough to extend 3/4" inside of the studding for the thickness of the lath and plaster. Let 2" horns on the outside of sill to set the casing on, and for any projection desired. Casing to be soft wood. Add 1/2" more to the length of the door frame than the height of the door. The window jamb should be plowed 1/2" or 3/8" for the parting stop, 2 3/8" from the outside of the jamb for 1 3/8" windows, and 13/16" stop. Set the pulley down from the top 3 1/2". Cut a pocket 4" from the bottom to a height of 10" to 12" to admit the weights.

Cut the pocket on a 60 degree angle and fasten with two screws at the bottom and one at the top. (See fig. 46.)

How To Set Door And Window Frames

Cut a pole 1/2" longer than the height of the door, adding the thickness of the finished floor. Set the pole under the head jamb of the window for height of frame. Level and plumb the frame at this height and fasten in place.