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Another
interesting addition to the playground equipment is the concrete sand box shown
on Plate 16. This may be made of any desired size, the one shown in the drawing
being 8 ft. x 12 ft. and 20 inch high. The concrete walls are 5 inch thick and
extend 8 inch below the level of the ground. The method of placing the form is
clearly shown. A trench is first dug as long and deep as needed and after the
form is set in place the concrete, consisting of a concrete mixture of 1 part concrete
, 2 parts sand and 4 parts gravel or broken stone, is poured. The concrete
forms should be removed in about 48 hours and the concrete surface of the
concrete rubbed down with a wet brick, using a neat concrete mixture under the
brick to help smooth up the concrete surface. The concrete should be protected
for about a week, wetting down each day. The concrete box should then be filled
three-quarters full of clean, sifted sand. Plate 17 shows the drawing of two
simple lawn pedestals, the first having a circular shaft and the second a shaft
square in section.
The shaft for the first pedestal is cast in a similar manner
to the concrete roller, using a piece of galvanized iron bent to a 6 inch
diameter and 24 inch long. The supports are made of wood with a hole cut in
them of sufficient size to allow the shaft form to pass through. The top form
should he turned down on a lathe out of a plank 33/2 inch thick, or of built up
stuff, as shown in the sectional view. The sub-base is cut from 1Y2 in: stock
with a circular hole about 9 inches in diameter. The base is hexagonal in shape
and is held together by patent corrugated fasteners. A 3/4 inch iron
rod about 8 inch long should be inserted in the center of the base, when being
cast, and projecting enough to go through the sub-base and flush with the
bottom side of the base proper. The top of the pedestal should be held in place
in a similar way with the exception that the rod should not penetrate the top
more than 2 inch When assembling, each piece should have a thin layer of neat
concrete grout consisting of concrete and water, spread upon it to form an
attaching mortar, to help hold the various parts together. The shaft should be
reinforced with 1/2 inch iron rods, placed at equal intervals, 1 inch from the concrete
surface. The top, sub-base and base should be reinforced with Y4 inch wire mesh
laid flat wise across their centers. After remaining in the concrete forms for
about 10 days they should be carefully removed and set away 3 or 4 weeks to
season. Wet regularly. Style B pedestal is very easily cast, the Operation
being similar to that of casting the concrete hitching post, Plate 13, and
reinforcing and assembling same as Style A. The pedestals shown on Plate 18are
made up similarly to Style B on the preceding plate, the only addition being in
the paneling, which is provided for on Plate 9, in the drawing of the horse
block.
The method of making the form and constructing and placing the panels are
self-evident in Plate 18. The pedestals shown on Plates 17 and 18 can easily be
made into excellent concrete sun dials by purchasing commercial dials and
attaching them in the following manner. The sun marks on the trees and flowers
the passing of the seasons, so it is fitting that on the dial-face it should
mark the flight of the quiet hours spent in the garden. The pedestal should be firmly placed on a
foundation that reaches below the frost line. The plate is set with the base of
gnomon pointing south, but as the true south varies from the magnetic meridian,
a compass will not accurately determine the position. A more accurate judgment
can be obtained by using a table of time variation which shows the daily
discrepancies between sun and standard time. With the aid of this table the
dial can be set by the sun, mid-day being the best time to make the adjustment.
The dial plate must be level, and when properly adjusted, should be securely
attached to the top of the pedestal with concrete mortar.
Are You in Millbury Massachusetts? Do You
Need Concrete Cutting?
We Are Your Local
Concrete Cutting Company
Call 508-283-3135
We Service all
surrounding Cities & Towns.
