Dimensions Guide

POLY-CLASSIC
®
COLUMN SPECIFICATIONS
MATERIALS:
Poly-Classic and DuraStone column shafts are manufactured of one-piece rotocast fiberglass reinforced polymer (FRP)
with marble dust. Our proprietary method of manufacturing our column shafts is patented, with patents applied for on
the DuraStone pre-colored, textured column process and materials. This one-piece construction, combined with the inher-
ent strength of FRP (pound for pound stronger than concrete, steel, or aluminum), provides an exceptionally high load-
bearing capacity, and a column that is impervious to rot, decay and insect damage. Unlike wood columns, the non-porous,
waterproof shafts can be used as channels for downspouts, wiring, and plumbing.
Turncraft’s FRP and DuraStone columns include Flame Guard™, and were the first in the industry to pass
the ASTME, 84-01 Class 1 Flame-Spread Classification tests, achieving a Flame Spread index of 15, and
Smoke Developed Index of 335, well below the allowable SDI index of 450.
Six-inch through twelve-inch diameter (up to twelve foot in height) standard FRP shafts are factory sanded. Larger shafts
(and square shafts) may require field-sanding prior to installation. All shafts are shipped unfinished, and Turncraft recom-
mends finishing with a high quality 100% acrylic latex primer and paint.
DuraStone pre-colored columns do not require finishing. The shaft material is colored throughout, utilizing UV inhibitors
that will minimize color fading. The surfaces of DuraStone columns, caps and bases are textured to imitate rough-hewn
stone. (18” and larger DuraStone bases are split in half and will require reassembly at time of installation.)
ROUND COLUMN SIZES:
Round tapered and non-tapered shafts are available fluted and unfluted in a wide range of sizes. Flutes in most 8”, 10”
and 12” diameter tapered shafts are molded right into the shaft, providing consistent Ionic fluting. All sizes can also be
custom-fluted for specific opening heights, and adjusted for the cap and base chosen. When shafts are custom fluted, typi-
cally the flutes end 1” from the top of the base. Larger diameter columns (30” and 36” diameters) are available on special
request.
Tapered shafts have a modified architectural entasis, with a Tuscan style astragal for authentic styling. Since these are
molded products, some sizes may vary from the 1/3 straight to 2/3 tapered ratio. Please see the tables on the following
pages for exact information on the shaft tapers, and top and bottom net diameters, fluting, etc. Non-tapered shafts have
no astragal, providing a more contemporary look.
SQUARE COLUMN SIZES:
Square non-tapered shafts are available unfluted, fluted, with a double raised
panel, or recessed panels. In addition, custom fluting is available. The astragal is
molded into the shaft for consistent spacing and simplified installation.
Column
Bottom
Diameter*
Tapered Round Shafts
5’ 6’ 8’ 9’ 10’ 12’ 14’ 16’ 18’ 20’ 22’ 24’
6” √ √ √
8” √ √ √ • √ • √ •
10” √ √ √ • √ • √ • √ •
12” √ √ √ • √ • √ • √ • √ √ •
14” √ √ √ √ √ √ √ √
16” √ √ √ √ √ √ √ √ √ √
18” √ √ √ √ √ √ √ √ √
20” √ √ √ √ √ √ √ √
24” √ √ √ √ √ √ √ √ √
*Actual shaft net diameter is 3/8” to 5/8” smaller than nominal size shown.
√ Available unfluted; • Available with standard flutes.
Column
Bottom
Diameter*
Non-tapered Round Shafts
8’ 10’ 11’ 14’ 15’ 12’
8” √ √
10” √ √
12” √ √ √
14” √ √ √ √
16” √ √
18” √ √ √
20” √ √ √
24” √ √ √ √ √
Column
Bottom
Width*
Non-tapered Square Shafts
8’ 9’ 10’ 12’ 14’ 16’
6” √ √
8” √•∆■ √•∆■ √•∆■
10” √■ √■ √■ √
12” √ √ √ √ √
14” √ √ √ √ √ √
* Net shaft width is 1/8” less than nominal size shown.
√ Available unfluted. • Available with standard flutes.
∆ Available paneled. ■ Available with recessed panels.