Dimensions Guide

POLY-CLASSIC SQUARE SHAFT SPECIFICATIONS
SQUARE NON-TAPERED SHAFTS :
Standard FRP column shafts are the same height as the listed size. Tuscan caps and bases, and the pedestal base 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 astragal), and will
affect the overall height: see the Ornamental Capitals for Square Columns specifications for more information.
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 over-
all stated column height.
All square non-tapered shafts may be ordered custom fluted. Flutes typically end
1” from the cap and 1” from the base. Fluting can be adjusted for the customers
requirements.
Column Diameter Concentric Load Eccentric Load*
6” 6,000 lb. 6,000 lb.
8” 10,000 lb. 6,600 lb.
10” 12,800 lb. 10,720 lb.
12” 18,000 lb. 17,320 lb.
14” 20,000 lb. 17,320 lb.
*See testing documentation for full information on eccen-
tric loading values.
LOAD CAPACITIES:
Square Non-tapered Column Shafts
Column
Nominal
Width
Column Shaft Shaft Neck
Flute Width
(20 each)
Space Available
Inside Shaft*
(Round or
Square Post)
Outside
Width
Inside
Width*
Neck
Height†
Astragal
Ring‡
(B) (C) (E) (D)
6” 5 7/8” 4 3/4” 3 5/8” 3/4” 1/2” 4 1/2”
8” 7 7/8” 5 3/4” 4 1/2” 3/4” 11/16” 5 1/2”
10” 9 7/8” 8 3/4” 5 1/16” 3/4” 7/8” 8 1/2”
12” 11 7/8” 10 3/4” 4 1/2” 3/4” 1” 10 1/2”
14”
13 7/8”
12 3/4” 7” 1” 1 1/4” 12 1/2”
* For 8” size, stock fluted shaft value is shown. Paneled and plain shafts are typically 1/2” to 1” greater.
† 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.
(A)
7 5/8"
(G)
(F)
4 7/8"
11 9/16"
(J)
6"
(I)
(H)
(C)
(B)
(N)
(M)
(L)
(K)
(E)
(D)
The “Space Available Inside Shaft” measurements are
calculated at the top inside width (with ± 1/4” tolerance.
Inside widths may vary. Ornamental capitals will reduce
the inside widths.
These measurements are provided to assist in determin-
ing the correct column diameter to go around a load
bearing post or lally column, or for clearance for water
downspouts, conduits, etc.
Inside Square
Inside Round
8” Fluted
Columns
(Stock)
Bottom of
Shaft Before
Flutes
Flute
Length
(F) (G)
8’ 10 15/16” 77 13/16”
9’ 10 15/16” 89 13/16”
10’ 22 15/16” 89 13/16”
8” Raised
Panel
Columns
Bottom of
Shaft Before
Panel
Bottom
Panel Height
Top Panel
Height
(H) (I) (J)
8’ 9 5/8” 22 15/16” 45 7/8”
9’ 9 5/8” 26 15/16” 53 7/8”
10’ 21 5/8” 26 15/16” 53 7/8”
Recessed Panel
Columns
Bottom of
Shaft Before
Panel
Panel Height
Top of Panel to
Top of Column
Panel Width
(K) (L) (M) (N)
8” x 8’ 12” 76 3/4” 7 5/8” 4 7/8”
8” x 9’ 12” 88 3/4” 7 5/8” 4 7/8”
8” x 10’ 12” 100 3/4” 7 5/8” 4 7/8”
10” x 8’ 14 1/2” 73 11/16” 8 3/16” 6 7/8”
10” x 9’ 14 1/2” 85 11/16” 8 3/16” 6 7/8”
10” x 10’ 14 1/2” 97 11/16” 8 3/16” 6 7/8”