is a molding of any convenient pattern. The face-board projects down at
least two inches below the angled cut of the rafter, so that when the
base-board is applied, the lower margin of the face-board will project
one inch below the base.

[Illustration: _Fig. 234._]

This base-board is horizontal, as you will see. The facia-board may be
of any desired width, and a corner molding should be added. It is
optional to use the brackets, but if added they should be spaced apart a
distance not greater than twice the height of the bracket.

A much simpler form of gutter is shown in Fig. 234, in which a V-shaped
notch is also cut in the rafter, and the channel is made by the pieces.
The end of the rafter is cut at right angles, so the face-board is at an
angle. This is also surmounted by an overhanging cap and a molding. The
base is nailed to the lower edges of the rafters, and the facia is then
applied.

[Illustration: _Fig. 234a._]

In Fig. 234_a_ the roof has no gutter, so that the end of the rafter is
cut off at an angle and a molding applied on the face-board. The base is
nailed to the rafters. This is the cheapest and simplest form of
structure for the roof.

SETTING DOOR AND WINDOW FRAMES.--The next step in order is to set the
door and window frames preparatory to applying the weather boarding. It
is then ready for the roof, which should be put on before the floor is
laid.

PLASTERING AND INSIDE FINISH.--Next in order is the plastering, then the
base-boards and the casing; and, finally, the door and windows should
be fitted into position.

Enough has been said here merely to give a general outline, with some
details, how to proceed with the work.

CHAPTER XII

BRIDGES, TRUSSED WORK AND LIKE STRUCTURES

BRIDGES.--Bridge building is not, strictly, a part of the carpenter's
education at the present day, because most structures of this kind are
now built of steel; but there are certain principles involved in bridge
construction which the carpenter should master.

SELF-SUPPORTING ROOFS.--In putting up, for instance, self-supporting
roofs, or ceilings with wide spans, and steeples or towers, the bridge
principle of trussed members should be understood.

The most simple bridge or trussed form is the well-known A-shaped arch.

[Illustration: _Fig. 235._]

COMMON TRUSSES.--One form is shown in Fig. 235, with a vertical king
post. In Fig. 236 there are two vertical supporting members, called
queen posts,