Under the shutter A B c D, is a bead a, which is continued across the sash-frame to serve for a capping; P is a vertical bead continued in a line with the edge, at D, of the rule joint.
o and N. Sub-plinth of window, flush with the bead P. u. MINI], or skirting-board.
Figure 79.—a. Architrave-moulding.
B. Ground.
c c c. Back lining.
it L. Sill of the sash-frame.
m. Plan of the inside bead.
N. Plan of the capping.
I langing style, hung to the sash frame at a. s S. A shutter, hung to the hanging style at e.
T T. Another shutter, hung to s sat n, if necessary.
P P. A door, hung to the architrave at m, falling upon the banging style a a by means of a rebate.
Note. The door must tall in a rebate at top and bottom.
u. A ground to fix the architrave upon.
v. The architrave fixed upon the ground.
w. Back. lining.
When the aperture is shut, the door r r must be turned round the hinge ?a, parallel to the face of the sash-frame : then the shutters a a, s S, T T, being drawn out and turned on the hinge a, and OD the hinges e and n, will cover that part of the window for which they were intended. The door P may then be closed, and the whole will have a uniform and neat appearance.
To AO the splay of the ground 6 e.—Draw a line the centre of the hinge at a to the edge of the ground at b; on a b, as a diameter, describe a circle cutting the back lining of the boxing at o; join c b, and it will be the bevel required.
Front and two side elevations of a window, the being out of the square, or an oblique-angled parallelogram: showing how to construct the sides of the window, so that the shutters shall make an equal margin round the edge of the sash-frame, when the window is shut : and also to fit their boxings.
Figure 90. Elevation of the window. Aacn being the edge of the sash-frame next to the bead, and E F a Ir the margin between the shutters and the inside beads.
The difficulty of fitting up a window of this kind may be surmounted if the fbliowing observations are attended to : the points and r, Figure 91, being taken at the distance E F, Figure 90, and the point a, Figure 91, being made to corres pond to Figure 90, the middle of the meeting rails ; then make the angle ac rc L, Figure 91, equal to the angle E E Figure 90 ; through a and I draw R s and 1 74 parallel to it L; then it L will be the front shutter, and a s the parting bead, in case the shutters are to be cut.
Figure 9'2, is constructed in the same manner as Figure 91 ; that is, by making the angle T 0 P equal to the angle L Ii E, Figure 90; the points o, T, N, being previously made to cor respond to the points n, L, a, as on the other side.
In Figures 91 and 9',2„% and a are lintels.
c. The top of the sash frame.
D. Thk• soffit.
G. Sash-fame sill.
F. Stone sill.
Plan and elevation of the shutters to the foregoing example ; showing the manner of hanging and cutting the shutter when the sash frame is an oblique-angled parallelogram, or out of the square, as workmen call it.
Let Figure 9:1, be the plan of the window, and let A B and D C, Figure 9 t, be the bottom and top ends of the shutters parallel to each other ; now, in order that the shutters may fit close into their boxing, and also close into the window frame, the centres of the hinges to each flap must be set in lines perpendicular to n o or A B.
To set out the shutters.—\l ake A e and Di, Figure 94, equal to the breadth of the front shutter, and draw the line f e ; then will A Df e represent the front shutter, and f e the edge on the flap will join to it ; then if the angle n f e be not a right angle hut obtuse, from fdraw f g perpendicular to c ; then will g be the line of the hinges. In the same manner, nog?. will represent the shutter on the other side ; 13 r q being the obtuse angle, and r s a perpendicular to A B for the line of the hinges : the two extreme joints being made, all the other joints, h k 1, m a, and o ought to be all perpendicular to the ends D c and A B of the shutters : then will the centres of the hinges be parallel to, or in the same line with, the joint.
To find the breadth of the flops which hang to the front shutters, so that they may be as wide as possible.—From the points A and c, the obtuse angles, draw Ay cu perpendicular to A B and D c, the ends of the shutters; make v a and A b equal to the breadth of the rebate; and from the point); and in the line of hinges, make f c,f h, and g d, g i, respectively, equal to f a, f V, and g b, g A; then will e f h i, be the flap ; and it is plain, from the nature of this window, that the other flap, o q r p, must be the same figure as the flap e f h i, but inverted.