Keep the ends of the crosspieces back from the
edges of the boards far enough to allow the end boards to fit in
against them.
One of the narrow sides can be formed in the same way, fixing the
crosspieces on to correspond, and then these three pieces can be
fastened together by screwing the two wide sides on the narrow
one.
Lay the floor next, screwing or nailing the boards to the
crosspieces, and making the last board come even with the ends of
the crosspieces, not even with the boards themselves. The single
boards can then be fixed, one on each side of what will be the
doorway, by screwing to the floor, and to the outside board of the
sides. At the top of the doorway, fix a narrow piece between the
side boards, thus leaving a rectangular opening for the door.
The roof boards may next be put on, nailing them to each other at
the ridge, and to the sides of the room at the outsides and eaves.
They should overhang at the sides and eaves about 2 in., as shown
in Figs. 3 and 4.
One of the sides with the crosspieces in place will be as shown in
Fig. 2 in section, all the crosspieces and bearers intersecting
around the room.
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