A column consists of a shaft with a capital and base. When selecting the column height, please be aware that the height includes the capital and base.

We sell Royal Corinthian Columns. Royal Corinthian has over 25 years experience in the manufacture of industry specified Fiberglass/FRP columns, previously reserved only for large commercial or residential specification. Royal Corinthian is a leader in quality through reputation, providing a long lasting, sturdy option to the standard “boutique” variety columns available elsewhere. Crown-Molding.com is very pleased to be one of the few online retail stores permitted to offer the Royal Corinthian line.
For Larger Sizes or Quantities
Just send us an email or give us a call




Please note 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 below 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.
Fiberglass Load Bearing Specifications
| Column Diameter | Load (max lbs.) |
|---|---|
| 6” | 8,000 |
| 8” | 10,000 |
| 10” | 14,000 |
| 12” | 18,000 |
| 14”’ | 20,000 |
| 16” | 20,000 |
| 18” | 20,000 |
| 20” | 20,000 |
| 22” | 20,000 |
| 24” | 20,000 |
| 28” | 20,000 |
| 30” | 20,000 |
| 36” | 20,000 |
| 42” | 20,000 |
*Inside diameter relates to the shaft only and therefore columns with a Tuscan Capital. Decorative Capitals sit on top of the column rather than sliding over the shaft, thereby limiting the amount of area for additional support. Additional support is only required when a column is split and still needs to be supportive or load bearing. Split columns are not load bearing. Our columns are nominal
Composite smooth columns are ideal for home owners or developers looking for a sturdy, long lasting solution impervious to water damage and bug infestation. Seasonal temperature variations have little effect on composite columns in comparison to traditional wood columns. Composite Columns are manufactured utilizing a strengthened fiber reinforced resin procedure that ensures added load capacity while maintaining a decorative stone like finish.These composite columns have been chosen for many years to adorn everything from home entrances to theme park facades.
- Manufactured with FRP, for durability and longevity
- Columns have a Stone like feel
- Perfect as patio columns, porch columns and for pergolas or gazebos
- Columns may be used around an existing support post when split.
- Structural fiberglass Columns have a Limited Lifetime Warranty
Crown-Molding.com supplied Columns are architecturally designed to add lasting quality to your home or major project. These decorative columns are available as smooth or fluted columns in tapered or non-tapered (straight) column design. Column Bases are available as a Tuscan style or Attic base. Some sizes include the option to use a less expensive urethane or plastic Tuscan base and Capital, ideal for low traffic areas or where extreme whether conditions are unlikely.
These decorative resin columns may be used structurally or decoratively to add elegance as porch columns, Patio Support columns or decorative entryways. These round, fluted and straight columns are manufactured to precise standards utilizing fiberglass-reinforced polymer (FRP), often referred to as resin cast columns. FRP columns have the elegance of a wood column with the durability and ease of column installation enjoyed in a fiberglass composite column.
Crown-Molding.com can supply larger columns in some instances. Feel free to contact us for a quote.
Round Tapered Smooth Fiberglass Columns Specifications

| Column Diameter | Bottom Shaft Dia | Top Shaft Dia | Bead Width | Cut At Bead Loss | First Ring | Minimum Wall Thickness | Available Lengths (feet) |
|---|---|---|---|---|---|---|---|
| (A) | (B) | (C) | (D) | (E) | |||
| 6” | 5-1/2” | 4-3/4” | 3/4” | 4-1/4” | – | 3/8” | 8, 9, 10 |
| 8” | 7-1/2” | 6-3/8” | 3/4” | 4-5/16” | – | 3/8” | 8, 9, 10 |
| 10” | 9-1/2” | 8-1/4” | 3/4” | 5” | – | 3/8” | 8, 9, 10, 12 |
| 12” | 11-1/2” | 9-11/16” | 3/4” | 6-1/4” | – | 3/8” | 8, 9, 10, 12, 14, 16, 18 |
| 14″ | 13-1/2” | 11-1/2” | 1” | 7-1/2″ | 4-1/4″ | 1/2″ | 8, 9, 10, 12 (more below) |
| 14” | 13-7/8” | 11-7/8” | 1-3/16” | 6-3/4” | 4-1/8″ | 1/2” | 14, 16, 18, 20, 22 |
| 16″ | 15-5/8″ | 13-1/2″ | 1-1/4″ | 8″ | 4-3/4″ | 1/2″ | 8, 9, 10, 12, 14 (more below) |
| 16” | 15-7/8” | 13-1/4” | 2-1/8” | 7-1/2” | 4-3/4″ | 1/2” | 16, 18, 20 |
| 18” | 17-11/16” | 14-7/8” | 1-7/8” | 8-7/8” | 5-1/8″ | 1/2” | 8, 9, 10, 12, 14, 16, 18, 20, 22 |
| 20” | 19-3/4” | 17” | 1-7/8” | 9-7/16” | 5-5/8″ | 1/2” | 8, 9, 10, 12, 14, 16, 18, 20, 22 |
| 22” | 21-7/8” | 18-1/4” | 2-1/16” | 11-3/16” | 6-1/2″ | 5/8” | 8, 9, 10, 12, 14, 16, 18, 20, 21 |
| 24” | 23-1/2” | 19-3/4” | 2” | 12-3/8” | 7-1/2″ | 5/8” | 8, 9, 10, 12, 14, 16, 18, 20, 22, 24 |
| 28” | 27-5/8” | 23” | 2-1/8” | 12-3/4” | 8-1/16″ | 5/8” | 8, 9, 10, 12, 14, 16, 18, 20, 22, 24, 26 |
| 30” | 30-1/8” | 25-1/4” | 1-1/2” | 13-3/4 | 8-3/4″ | 3/4” | 8, 9, 10, 12, 14, 16, 18, 20, 22, 24, 26 |
| 36” | 36-1/2” | 31” | 2-1/8” | 19-3/8” | 10-3/4″ | 1” | 8, 9, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30 |
| 42” | 42” | 36-5/8” | 3” | 22-1/4” | 1-1/4” | 8, 9, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30 |
*Our Sizes Are Nominal
Columns to Surround Structural Supports
| Column Diameter | Inside Top Shaft Diameter(S) | Largest Round Support | Largest Square Support |
|---|---|---|---|
| 6” | 4” | 3-1/2” | 2-3/8” |
| 8” | 5-5/8” | 5-1/8″ | 3-1/2” |
| 10” | 7-1/2” | 7” | 4-7/8” |
| 12” | 8-15/16” | 8-7/16” | 5-7/8” |
| 14” | 10-1/2” | 10” | 7” |
| 16” | 12-1/4” | 11-3/4” | 8-1/4” |
| 18” | 13-7/8” | 13-3/8” | 9-3/8” |
| 20” | 16” | 15-1/2” | 10-7/8” |
| 22” | 17-3/8” | 16-7/8” | 11-7/8” |
| 24” | 18-1/2” | 18” | 12-5/8” |
| 28” | 21-3/4” | 21-1/4″ | 15” |
| 30” | 24” | 23-1/2″ | 16-1/2” |
| 36” | 29” | 28-1/2″ | 20-1/8” |
| 42” | 34-1/8” | 33-5/8” | 23-3/4” |

Select one of these decorative column capitals or bases from the drop down lists above.

Tuscan Capital

Rounded Tuscan Capital

Roman Ionic

Scamozzi

Roman Corinthian

Temple of the Winds

Doric

Modern Composite

Greek Erechtheum

Greek Erechtheum with Necking

Greek Angular

Empire

Empire with Necking

Tuscan Base

Rounded Plinth Tuscan Base

Doric Base

Attic Base

Rounded Plinth Attic Base




Robert LeGault (verified owner) –
The two, nine foot columns, caps and bases were well-made with excellent detailing. It took approximately five weeks for the 370 lb. pallet to arrive at the door by semi-trailer. They’re heavy, but maneuvered and trimmed easily laid horizontally on a home-made door dolly. The website was clear, and easy to navigate for ordering. I recommend these columns.
Andy amann (verified owner) –
Great product and packaging
Ralph Plechner (verified owner) –
Delivery was 5 stars-along with packing,items exactly as ordered.No problems at all.Your employee Sandy handled all details in an outstanding manner.
Terri Benson (verified owner) –
These columns are beautiful and exactly what we wanted. Delivery was timely, installation and painting were easy; they really add class and value to our new home. I would highly recommend this product and this company!
Jeff Calcutt (verified owner) –
Are you searching for superb workmanship at a reasonable price? Then your search stops here. The four fiberglass columns, capitals and bases I ordered are much more durable and sturdy than the word ‘fiberglass’ might imply, I am well satisfied, You will be, too.
Robert (verified owner) –
Fantastic. Looked like the original when installed
Kurt Krueger (verified owner) –
The folks at Crown-Molding.com were very good to work with. The ordering process was great and the staff was knowledgeable .I was happy with the way the material was palatalized for shipping and it was delivered without any damage. I reached out ask installation questions and was given great instruction and help.
I am very pleased with the final look of the product. It has added the finished feature to the room that I was looking for.
Thank You
Kurt
Douglas Jennings (verified owner) –
This was a wonderful transaction from start to finish. The products are great, and customer service is superb.
Henry Lovell-Miller (verified owner) –
Excellent quality and seams fit perfectly. I was so happy with the 1st 2, I ordered 4 more. It really changed the look of a 200 year old house.
Sunil Kadakia (verified owner) –
Quick support and reliable delivery
DT (verified owner) –
Even better than I expected. Very solid, almost like stone. Looks perfect. Used them to replace wood columns that were deteriorating, they were almost an identical match. Can’t recommend highly enough.
John M Lee (verified owner) –
Very pleased with my second order from crown molding.com. Columns are of good quality and arrived packaged very well.
Peter Millett (verified owner) –
Sandy was a real help in explaining product details and reviewing the order for accuracy!
Anonymous (verified owner) –
Richard (verified owner) –
Great quality, easy to cut and fit. Would recommend.