Poly-Classic ® Ornamental Capital Installation Instructions For Poly / Resin Capitals WITH Centering Neck Sleeve
Capitals with centering neck sleeves are made of a load‐bearing Poly / Resin material , and have a centering sleeve (" neck sleeve " or " plug ") built‐in to connect the column shaft to the capital . When using caps with neck sleeves , the top of the shaft MUST be cut off before installing the capital . ( The factory may trim the shaft before shipping .) For an architecturally correct installation , using Empire , Greek Angular Ionic , Greek Erectheum , Roman Doric Ornamental , Roman Ionic or Scamozzi capitals , the installer should trim to below the neck ring , leaving only the flat ring ( fillet ) directly below the neck ring . For Empire with Necking , Greek Erectheum with Necking , Modern Composite , Roman Corinthian and Temple of Winds capitals , the shaft should be trimmed flush at the top of the astragal molded in the shaft . See the trimming illustration at right .
Since the different capital styles have different heights , the overall maximum height of the finished column will most likely change . Please see the “ Height Adjust ” information in the Poly‐Classic Ornamental Capitals specifications pages to determine the height difference when using ornamental capitals .
Installation Steps ( in addition to standard instructions ):
1 ) To help keep the top of the column in the correct place , you may want to cut a " centering block " to fit inside the top of the capital . Scraps of plywood or other materials are commonly used . Attach this centering block to ceiling / soffit .
2 ) Using an abrasive blade ( Carborundum , carbide or similar ) trim the shaft accordingly ( see diagram at right ).
3 ) Calculate the correct finish height and trim the bottom of the shaft accordingly . Slide base over bottom of the shaft , then attach the installation brackets at the bottom of the shaft .
4 ) Set the capital on top of the column shaft . Pre‐drill shaft and neck sleeve and countersink the column shaft where you want screws to attach the capital to the shaft . Remove cap , apply construction adhesive or caulking to the base of the cap and the neck sleeve , then re‐insert into the top of the shaft , and attach with non‐corrosive screws .
5 ) Apply construction adhesive or caulk as needed to the top of the cap . All column installations should be flashed if they are placed in an area where water , debris , etc . could accumulate inside the shaft .
6 ) If necessary , jack up the roof where the column is to be installed ( approximately 1 / 4 ” is usually sufficient .) Raise the column into place , slipping the top over the centering block , then sliding the bottom in until the column is plumb . Lower roof onto column .
7 ) Pre‐drill and counter‐sink through the capital abacus ( top ) and attach to the ceiling / soffit with non‐corrosive screws .
8 ) Attach column at base ( see standard column installation instructions ). Fill all countersunk screw holes , seams , etc . with caulk . Sand , clean and finish according to standard instructions .
Trimming shafts for use with Poly / Resin capitals :
For Empire with Necking , Greek Erectheum with Necking , Modern Composite , Roman Corinthian , and Temple of Winds capitals , trim at this point :
For Empire , Greek Angular Ionic , Greek Erectheum , Roman Doric Ornamental , Roman Ionic and Scamozzi capitals , trim at this point :
Centering block - fits inside of shaft or cap : ( not provided by Turncraft )