ilasters, 69 ft. 10 in. over all.
The forms of the 4-ft. belt and beading were made in twelve sections of
simple segments and vertical lagging, as shown in Fig. 2.
Two sets of the outside forms were split longitudinally, as shown in
Fig. 2, and used to form the small pilasters. The first set was put in
place, filled, and the concrete allowed to harden. The bolts were
loosened and the forms raised 5-1/2 in. vertically, again bolted up, and
the second set was placed in position, bringing the top of the second
set up to the bottom of the cornice. The bases and capitals of the small
pilasters were moulded on afterward.
The cornice forms are clearly shown in Fig. 2. The small boxes
separating the dentils are made of light stuff, and tacked into the
cornice forms so that, in stripping, they would remain in place and
could be taken out separately, in order to prevent breaking off the
corners of the dentils. A number of outside and inside sections were
sawed in half horizontally in order to provide forms for the parapet
wall.
The inside diameter of the tank is 8 in. greater than the inside
diameter of the base. Two sets of inside forms were split longitudinally
and opened out, as shown in Fig. 2, and another small section was added
to complete the circle. The remaining set was left in place to support
the dome forms.
The dome forms were made in twelve sections, bolted together to
facilitate stripping. All ribs and segments were cut to size on the
ground, put together in place, and then covered with lagging and two-ply
tar paper. The lagging on the lower sharp curve was formed of a double
thickness of 3/8-in. spruce, the remainder being 1 by 4-in. pine, sized
to a uniform thickness of 7/8 in. Fig. 3 shows the construction of these
forms and the method of putting on the lagging.
The roof forms were made in eight sections and bolted together to
facilitate stripping. All ribs and segments were cut to size on the
ground, put together in place, and covered with 1 by 4-in. lagging,
dressed to a uniform thickness of 7/8 in., and two-ply tar paper. Fig. 3
shows the construction of these forms. The segments being put in
horizontally instead of square with the lagging, gave circles instead of
parabolas, making them much easier to lay out, and giving a form which
was amply stiff.
The question of using an inside scaffold only was carefully considered,
but owing to the considerable amount of ornamentation on the outside,
nece
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