Measure the entire height of the overhang opening fro, the soffit to the deck. Subtract the space taken up by the base and plinth assembly and the capital assembly. A good technique is to set the cap and base on the deck (Fig. 5-1) and then measure up to the soffit or beam (Fig. 5-2). Be especially careful to account for the height of the ornamental capitals with their wooden plugs.
Trim top of shaft for the type of capital you will be installing. For fiberglass or poly caps, trim to 1/4” above the fillet (top molding) (Fig. 5-3). For the Temple of Winds and Roman Corinthinain Capitals, trim column at the top of the neck ring molding (Fig. 5-4). For Ionic type capitals, trim column immediately below neck ring (Fig. 5-5).
Then measure carefully from the top of the trimmed shaft, along with the edge of at least three staves, around the circumference of the shaft to determine the bottom trim line ( Fig. 5-6). Using cardboard or other flexible material, draw a trim line completely around the shaft. By carefully following this procedure, you will ensure that the shaft top and bottom cuts remains square to the centerline of the shaft.
Trimming shaft to exact height
1. Measure the entire height of the overhang opening fro, the soffit to the deck. Subtract the space taken up by the base and plinth assembly and the capital assembly. A good technique is to set the cap and base on the deck (Fig. 5-1) and then measure up to the soffit or beam (Fig. 5-2). Be especially careful to account for the height of the ornamental capitals with their wooden plugs.
2. Trim top of shaft for the type of capital you will be installing. For fiberglass or poly caps, trim to 1/4” above the fillet (top molding) (Fig. 5-3). For the Temple of Winds and Roman Corinthinain Capitals, trim column at the top of the neck ring molding (Fig. 5-4). For Ionic type capitals, trim column immediately below neck ring (Fig. 5-5).
3. Then measure carefully from the top of the trimmed shaft, along with the edge of at least three staves, around the circumference of the shaft to determine the bottom trim line ( Fig. 5-6). Using cardboard or other flexible material, draw a trim line completely around the shaft. By carefully following this procedure, you will ensure that the shaft top and bottom cuts remains square to the centerline of the shaft.
