Vendor Door Catalogs Turncraft Full Line Catalog | Page 37

Comparison of the Orders
ARC
Turncraft Architectural wood
columns are our premier product
for precise attention to detail both in design
and quality. Unlike FRP columns, where
the manufacturing processes dictate some
alterations to details, our wood columns are
closest to true architectural specifications
such as proportion, fluting and entasis (taper
or bow).
Architectural columns are best proportioned
when following the suggestions of William
Ware (The American Vignola), Robert
Chitham (The Classic Orders of Architecture),
Palladio and others to emulate the ancient
architecture of Greece and Rome. The
illustration “Comparison of the Orders”
shows how the height and diameter ratio
affects columns of a similar diameter. Tip: to
determine the correct diameter for a column
in the height you need, simply divide the
height by the diameter factor given below
the style chosen. For example, at a two-story
Corinthian
Ionic
Roman Doric
Tuscan
Greek Doric
10 Diameters
9 Diameters
8 Diameters
7 Diameters
4 to 6 Diameters
height of 198”, an Ionic column (9 diameters)
should be 22” in diameter (198/9=22), or a Tuscan column (7 diameters) should be 28” in diameter.
In addition to the round columns shown, Turncraft Architectural can provide wood columns in non-
architectural proportions, in many plan types, including squares, octagons and pilasters, either straight or
tapered, as well as coupled columns, and other custom configurations.
Using our computerized lathes, our wood columns typically have the correct column entasis (taper or bow)
– the lower one-third of the shaft is straight, and the upper two-thirds has a diminishing
Entasis Taper
taper. The “Entasis Taper” illustration shows precisely how this is generated. We also
have the ability to customize the shaft taper. For example, straight tapers are common,
as well as barrel columns where the center of the shaft is larger than both ends.
1'-1.50"
Red Oak Black Walnut
Cherry Mahogany
Our most popular stain grade species are red oak, mahogany,
cherry, maple, and walnut. The examples here show the
differences in grain and color. However it’s best
to keep in mind that the finish used affects the
final color, so this isn’t an exact match.
Hard Maple
10.44"
1'-3.72"
For interior use, Turncraft is able to manufacture columns
from a wide variety of woods. Paint grade woods are
typically finger-jointed pine or poplar, and stain grade can be
practically any species imaginable.
1'-3.38"
Redwood
1'-2.88"
1'-3.94"
Pine
1'-2.25"
1'-4"
For exterior use, the recommended wood for shafts is redwood or cedar because of their
inherent resistance to insects and wood rot, and they carry a ten year limited warranty.
Pine is also available, with a one year limited warranty. Cap
Primed
Primed
and base for exterior columns are usually polyurethane (up to
16” columns) or fiberglass (18” and larger).
1'-4"
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