Please note that this chart is for Round Tapered RoyalCast Columns; RoyalStone Columns tend to be slightly thicker and RoyaLite slightly thinner. The chart is fairly conservative and in most cases we can surround larger structural members than indicated. Columns that surround structural supports are typically split for reassembly so this chart allows for loss due to saw kerf. Columns that are split are no longer considered load-bearing. The inside diameter of decorative capitals is much smaller than the column shaft so the chart above will not work for decorative capital applications. To insure that the column ordered will surround the intended structural support, the column needs to be split by Royal Corinthian and the shape and size of the structural support needs to be indicated on the purchase order. Royal Corinthian will not accept any liability if columns are purchased not split and do not wrap the published structural support sizes. When a column is ordered full round (not split), it is implied that the column will not be used to surround a structural support. If the contractor intends to drop a full round (not split) column around the structural support, the shape and size of the structural support needs to noted on the purchase order at the time of order.  RoyaLite column covers are already intended to be used around structural members and are supplied as halves with integrated lap joints: They can be factory assembled but will bear a fraction of the weight of the other columns.