Square Recessed Panel Columns


Royal Corinthian manufactures square non-tapered recessed panel columns from 4 composite materials: RoyalCast™ Composite Fiberglass, RoyalStone™ Synthetic Stone, RoyaLite™ FRP Lightweight Fiberglass, and RoyalWrap™ PVCWe only offer composite materials because we want these columns to last for generations. We also offer RoyalCrete™ GFRC columns for those wanting a cast stone product with a segmented look. If you know which material is most suitable for your project, you can find the available sizes, various dimensions, and other specs in the charts below. If you desire to learn more about our materials, please call us for a quick run through or check out the comparison chart on our column page. For sizes and specifications for our recessed panel PVC column wraps, please visit our non-tapered PVC column wraps section.

Our recessed panel square columns are available from widths of 8” to 16” and, as always, custom sizes are our forte due to our own mold making department. Even though we offer all of our square non-tapered columns in every material, some of the specifications in the charts below only apply to certain materials. RoyalCast and RoyalStone columns are spun-cast resulting in a load bearing column with a circular opening (see cut views for comparison below). RoyaLite FRP column covers on the other hand are made in two halves with lap joints using a spray up method, which results in a thin column with a square hole (RoyaLite is pound for pound stronger than steel). Typically, our FRP column covers are shipped as halves but we are able to assemble them on your behalf if you are looking for a whole, lightweight, robust column that doesn’t need to bear much weight. GFRC columns are made in segments and stack on top of one another. All of our capitals and bases are made from the same material as the shaft.


RoyalCast, RoyalStone, & RoyaLite Columns

Column WidthTop/Bottom Shaft WidthBead Width*Side ClearanceAverage Wall Thickness*Load-bearing Capacity*(lbs.)Available Lengths (feet)
(A) & (B)(C)(I)

*Load bearing capacities and average wall thicknesses apply only to RoyalCast and RoyalStone. Wall thickness at panel will be significantly less than at the top and bottom of the column and is not considered in the average thickness. RoyaLite FRP column covers have a average wall thickness of 3/16” and only bear minimal weight when factory assembled. 14" and 16” Columns have an astragal and capital support ring that is part of the shaft while the other sizes are available with an optional loose astragal. The astragal is 8” and the support ring is 4-7/16” from the top on the 14” column. The astragal is 9" and the support ring is 5-1/8" from the top on the 16” column. Astragal and/or support ring can be removed if desired. Specs for GFRC columns are available upon request.

Square Recessed Panel Column Line Drawing

Columns to Surround Structural Supports

Column WidthInside Top Shaft DiameterLargest Round SupportLargest Square Support

RoyaLite column covers can surround significantly larger square supports than indicated on the chart due to the square shaped hole. GFRC specs upon request.

Square Non Tapered Column Inside Diameter
Tuscan CapTuscan Base
SizeWidthHeightWeight (lbs.)WidthHeightWeight (lbs.)

Weights are based on cast materials. RoyaLite caps/bases are significantly lighter but very robust. GFRC specs upon request.