nailed on to them, and r3 the tie t, which should be in line with the
rafters. The other three pairs require temporary ties halfway up to prevent
straddling during erection.

Door Frames and Doors.--The method of fixing the frame of the door at the
run end is shown in Fig. 14. The material for the frame being 1/2 inch
thicker than that of the rafters, there is room for shoulders at the top
angles, as indicated by dotted lines. The door frame at the house end is of
the same thickness as r1 so that no overlapping is possible. This being the
case, screws should be used in preference to nails, which are liable to
draw a sloping face out of position as they get home.

[Illustration: Fig. 14.--On left, elevation of end of run; on right,
door for run.]

The doors are made of 2 by 2 inch stuff, halved at the corners. Cut out the
top and bottom of the two sides; lay them on the floor so as to form a
perfect rectangle, and nail them together. The strut is then prepared, care
being taken to get a good fit, as any shortness of strut will sooner or
later mean sagging of the door. Cut the angles as squarely as possible, to
ensure the strut being of the same length both inside and out.

Note.--As the door is rectangular, it does not matter which corners are
occupied by the ends of the strut; but when the door is hung, the strut
must run relatively to the side on which the hinges are, as shown in Fig.
14. Amateurs--even some professionals--have been known to get the strut the
wrong way up, and so render it practically useless.

Covering the Ends of the House.--The ends of the house should be covered
before erection, while it is still possible to do the nailing on the flat.