Fig. 71.—Details of Inside Stairs.
After nailing these partitions to the places marked out for them, and building in the stairs,
Lay the Third Floor ([Fig. 67]), cutting a three by seven inch stair opening, and fastening the boards in place as you did those of the second floor.
Stairways.—While each stairway should be built before the floor above is laid, in order that the work can more easily be done, they have been left for description here, that they might be spoken of in a general way. In Figs. [71], [72, 73, 74, and 75] will be found complete details for these.
The first things to prepare are
The Stair Stringers, or supports for the steps (treads and risers). Cut from a piece of cardboard what is known as
The Pitch-board, the pattern by which to lay out the steps ([Fig. 73]). Then draw a line lengthwise upon a thin strip of wood (AB in [Fig. 72]), and lay off the pitch-board on this as shown in [Fig. 72]—sixteen times for the first to second story stairs and fifteen times for the second to third story stairs. Draw the line DE parallel to AB, and the lines CD and EF as shown. Then cut out the stringer along the lines CDEF, being careful in doing so not to split off the corners. Prepare two stringers for each flight of stairs.
The Treads and Risers should be cut as shown in [Fig. 74], and the