Dimensions Guide

POLY-CLASSIC ROUND SHAFT SPECIFICATIONS
ROUND TAPERED SHAFTS:
Standard FRP column shafts are the same height as the listed size. Tuscan and Roman Doric caps and bases, and Attic bases go around
the shaft, and do not affect the overall height. Ornamental capitals are set on top of the shaft (after the shaft is trimmed to the astra-
gal), and do affect the overall height: see the Ornamental Capitals for Round Columns specifications for more information. On custom
fluted shafts, the flutes start 1”from the astragal, and typically end 1” from the base. Fluting can be adjusted for the customer’s require-
ments.
Since the Tuscan caps for DuraStone columns install on TOP of the shaft, rather than around it, the shaft itself is reduced in overall
height by the height of the Tuscan cap. The height of the shaft plus the height of the cap will achieve the overall stated column height.
Column
Nominal
Diameter
Shaft
Height
Shaft Bottom* Shaft Top*
Space Available
Inside Shaft:
Shaft Neck
Flute
Width
(24 ea.)
Straight
Portion of
Shaft
(unfluted
columns)
Straight
Portion
of Shaft
(fluted
columns)
Smooth
shaft
before
flutes
Outside
Diameter
Inside
Diameter
Outside
Diameter
Inside
Diameter
For
Round
Post
For
Square
Post
Neck
Height†
Astragal
Ring‡
(A) (C) (D) (H) (I) (G) (F) (B) (B) (E)
6”
5’
5 11/16” 4 3/4” 4 13/16” 3 3/4” 3 3/8” 2 1/2” 3” 1/2” 1/2”
23 1/16”
n/a n/a 6’ 35 1/16”
8’ 59 1/16”
8”
5’
7 5/8” 6 3/4” 6 19/32” 5 1/2” 5 1/8” 3 1/2” 4 1/4” 1/2” 11/16”
14 1/16” n/a n/a
6’ 26 1/16” n/a n/a
8’ 50 1/16” 50” 10 1/2”
9’ 62 1/16” 54” 10 1/2”
10’ 72 1/16” 65” 10 1/2”
10” 9 11/16” 8 3/8” 8 9/16” 7 3/4” 7 3/8” 4 15/16” 5 1/8” 3/4” 7/8”
4’ 0” n/a n/a
5’ 0” n/a n/a
6’ 10 11/16” n/a n/a
8’ 34 11/16” 39” 11”
9’ 46 11/16” 56” 11”
10’ 58 11/16” 65” 11 1/4”
12’ 82 11/16” 89” 11 1/4”
12”
5’
11 5/8” 10 3/4” 10 1/16” 9 1/4” 8 7/8” 6” 4 3/4” 3/4” 1”
0” n/a n/a
6’ 8 3/4” n/a n/a
8’ 32 3/4” 42 3/4” 12”
9’ 44 3/4” 49” 12”
10’ 56 3/4” 53” 12”
12’ 80 3/4” 60” 12 1/8”
14’ 62” n/a n/a
16’ 86” 87” 12 1/8”
14”
8’
13 1/2” 11 1/2” 11 9/16” 10 1/2” 10 1/8” 6 3/8” 6 3/4” 1” 1 1/4”
33 1/4”
9’ 45 1/4”
10’ 57 1/4”
12’ 81 1/4”
14’ 57 1/4”
16’ 81 1/4”
18’ 105 1/4”
20’ 129 1/4”
16” 15 7/16” 13 1/2” 13 1/8” 12” 11 5/8” 7 7/16” 7 3/8” 1” 1 7/16”
5’ 16 1/4”
6’ 28 1/4”
8’ 18 1/2”
9’ 30 1/2”
10’ 42 1/2”
12’ 66 1/2”
14’ 27 1/4”
16’ 51 1/4”
18’ 75 1/4”
20’ 99 11/4”
* Diameters may vary ± 1/8”
† Neck Height is the distance from the top of the shaft to the top of the astragal ring, ± 1/8”.
‡ Astragal ring is only the ring portion, and does not include the fillet and cove.
(E)
(G)
(F)
(B)
(A)
(C)
(D)
(H)
(I)