Calculated Safe-Load Capacities
W
| Shaft Dia. |
Pine |
Redwood |
| 6" |
2,567 |
6,111 |
| 8" |
4,114 |
9,234 |
| 10" |
5,497 |
12,812 |
| 12" |
6,620 |
16,029 |
| 14" |
11,017 |
17,420 |
| 16" |
12,307 |
21,115 |
| 18" |
14,487 |
24,853 |
| 20" |
16,688 |
28,358 |
| 22" |
18,426 |
32,170 |
| 24" |
20,018 |
36,000 |
| 26" |
22,252 |
39,845 |
| 28" |
24,001 |
43,720 |
| 30" |
25,746 |
47,567 |
| 32" |
42,080 |
64,737 |
| 34" |
44,567 |
68,564 |
| 36" |
47,054 |
72,391 |
Sample columns tested supported loads at least four
times calculated value above prior to failure. Load applied concentrically through axis of
column. Loads valid only if uniform contact between full area of column ends and cap and
base units. Loads are provided for your convenience and are not exact values. Consult
structural engineer for most-accurate load estimates.
Superimposition
Renaissance authority Scamozzi's view was that the
lower diameter of a top column should equal the upper diameter of the column underneath.
The superior order should always be placed over the inferior; i.e., Corinthian on Ionic,
Doric, Tuscan. The more slender and elegant orders should be placed over the stockier and
more solidly built if a top-heavy design is not desired. An ancient example of this
descending order is the Colosseum at Rome, which has at least four stories of superimposed
orders.
Column Splitting
Using a precision splitting template machine, columns
can be divided in halves to be used as pilasters or to be reassembled around existing
structural members. Columns designed for reassembly come with realignment splines and
installation instructions.
Plan Types
Turncraft Columns are available in the following plan
types. Please specify when you order.
Stave Thicknesses
| Shaft Dia. |
Unfluted |
Fluted |
| 6" |
1-1/2" |
1-1/2" |
| 8" |
1-1/2" |
1-1/2" |
| 10" |
1-1/2" |
2" |
| 12" |
1-1/2" |
2" |
| 14" |
2" |
2" |
| 16" |
2" |
2" |
| 18" |
2" |
2" |
| 20" |
2" |
2" |
| 22" |
2" |
3" |
| 24" |
2" |
3" |
| 26" |
2" |
3" |
| 28" |
2" |
3" |
| 30" |
2" |
3" |
| 32" |
3" |
3-1/2" |
| 34" |
3" |
3-1/2" |
| 36" |
3" |
3-1/2" |
|
