Limestone creates timeless building
According to Design Principal Turan Duda from Duda/Paine Architects, LLP, of Durham, NC, the bank's founder had been dreaming about this project for the past 40 years. â€œThe first thing the owner said was that he wanted the building to look as if it had always been here - that it belonged here,â€ the architect explained. â€œHe wanted it to have a sense of permanence and timelessness.â€
The exterior facade is clad in 65,000 square feet of Golden Beach limestone, which was quarried in Portugal and fabricated by Henraux in Italy. â€œWe knew we wanted limestone, which is a material with a lot of warmth,â€ said Duda. â€œIt was important to us that it have a natural glow to it. Even on a rainy day it looks like the sun is shining on this material.
â€œWe were fortunate that Henraux found the perfect material for us - with its very warm beige color,â€ the architect continued. â€œIt also has something that most limestones don't, which is a light veining throughout that gives it texture and a sense of character. It was important to me that the exterior stone on the building have variation and movement, and the veining throughout this material has all those qualities. It is structurally sound and a very dense material.â€
The wall is comprised of 18,700 pieces of stone, with the typical piece measuring an average of 22 x 44 inches. To avoid complications and high costs, the stone was installed using a unique curtainwall system that was designed and manufactured by Baker Metal Products, Inc. The company developed a unitized curtainwall design that simplified the edge of slab details and supported the extended faces of stone on aluminum trusses. The aluminum trusses were factory assembled in Dallas, TX - at Baker Metal Products' facility - and the limestone, with thicknesses ranging from 1 _ to 4 inches, was factory installed on the trusses. Each assembled truss weighed about 3,000 pounds and was set on the jobsite with a tower crane.
The exterior also features an Autumn Brown granite base in a thermal finish. â€œGranite is a forgiving material and weathers well,â€ said the architect.
Interior StoneworkNatural stone was also carried indoors as U.S.-quarried Gray Tapestry granite was selected for the flooring because of its durability. â€œInside, we have a very classic selection of material,â€ said Duda. â€œThis material has a gray swirl pattern that gives just enough movement and activity and it makes a beautiful field granite. We also used a bordering device - a black granite paver referred to as Nero Zimbabwe, which is from Africa.â€ The floor also features accent pavers of Rojo Alicante marble, which comes from Spain.
The interior walls feature honed Arabescato Cerviole marble from Italy. Duda described the material as a beautiful white material with grayish veining throughout. â€œWhat we really liked about the material was its translucent quality,â€ he said. â€œIt looks like it is emitting light.â€
Ocean Verde marble - quarried in Guatemala - was used for vertical interior walls, as well as for the wainscoting at the bottom of the interior walls, and as a framing device on openings such as windows.
Another significant highlight of the project is a grand staircase, which connects a two-level lobby. The staircase features Fior De Pesco marble from Northern Italy. â€œIt is the perfect gray marble with white and pinkish veins,â€ said the architect. â€œWe also used the material as an art wall by creating two very large sculpted forms on either side of the stairs in a bookmatched pattern.â€
Overcoming obstaclesAccording to Duda, who wanted the facade to have depth and shadowed reliefs of solid stone, challenges of working with the thin stone veneers used today were overcome by significant teamwork and state-of-the-art technology. â€œIf you think about how buildings like this were put together in the past - large pieces of stone measuring 1 foot thick or 8 inches thick - had to be cut in order to create the type of relief we have here,â€ he explained. â€œMost of the stones we used are no more than 2 inches thick to create variation shadow lines, deep recesses and reveals. Having Bob Baker [from Baker Metal Products, Inc.] on the job was absolutely essential. He engineered a way to employ a panelized system. He fabricated and assembled the wall panels in his shop on a skeleton of aluminum, and then hung these panels on site. If we tried piece by piece, it would have been absolutely impossible to create the kind of surface we wanted with such thin veneer.
According to Duda, technology was absolutely critical to the success of the building. â€œBeing able to use thinner stone material with an aluminum backing allowed us to make the walls much lighter in weight and saved costs as far as structure is concerned,â€ he said.
Construction on the 177,000-square-foot structure began in July 2004 and was completed in March 2006. â€œWe are delighted that it has been so wonderfully embraced by the residents of the city of Columbia,â€ said Duda.
Design Architect: Duda/Paine Architects, LLP, Durham, NC
Architect of Record: Stevens & Wilkinson of South Carolina, Inc.
Stone Supplier/Processor: Henraux, Carrara, Italy
General Contractor: Holder Construction Co., Atlanta, GA
Manufacturer/Designer: Baker Metal Products, Inc., Dallas, TX (curtainwall system)
Subcontractor: Harris/Carnter Wall Systems, Inc. (curtainwall)
Curtainwall Erector: Curtainwall Erectors, Inc.