Projects: Historic Preservation

KANSAS STATEHOUSE COPPER DOME & ROOF REPLACEMENT, TOPEKA, KAN.

KANSAS STATEHOUSE COPPER DOME & ROOF REPLACEMENT

KANSAS STATEHOUSE COPPER DOME & ROOF REPLACEMENT

TEAM

SHEET-METAL CONTRACTOR (DOME): Baker Roofing Co., Raleigh, N.C.
SHEET-METAL CONTRACTOR (ROOF): MG McGrath Inc., Maplewood, Minn.
SPECIALTY FABRICATION (DOME): Ornametals LLC, Decatur, Ala.
ARCHITECT: Treanor Architects P.A., Topeka
GENERAL CONTRACTOR: J.E. Dunn Construction Co., Topeka

ROOF MATERIALS

The $22 million copper roof and dome replacement, completed in late December 2013, occurred over previously restored, occupied spaces and utilized approximately 127,000 pounds of copper. The east and west wing roofs are covered with 24,700 square feet of 20-ounce copper batten-seam roofing. The central, north and south wing roofs are finished with a hybrid horizontal and standing-seam roof constructed of 20-ounce copper to replicate the historic roof.

ROOF REPORT

The Kansas Statehouse’s copper dome, contrasted by the limestone structure, has captured the attention of citizens and visitors alike for more than 100 years. Built in three distinct phases during a 37-year period, the Kansas Statehouse reflects the changes in construction between the 1860s and the turn of the 20th century.

Planning for the statehouse’s restoration began in 1999 with an overall evaluation of the building and schematic design. For the legislature to continuously occupy the building, the construction was broken into six major phases and 29 separate bid packages. As part of the statehouse preservation and restoration, Treanor Architects completed a study on the existing roof and dome systems between 2007-10 and concluded the entire copper cladding needed to be replaced. Because of its longevity, copper proved to be the best long-term value for the project when other cost factors, such as access, associated repairs and maintenance, were taken into consideration.

TO COMPLY with the Secretary of the Interior’s Standards for Rehabilitation, the replacement copper design had to replicate the historic construction as closely as possible. However, areas identified as leak-prone or lacking in provision for thermal expansion were targeted for changes to better protect the building in the future. The design included repairs for substrate damaged by infiltration and alterations to the substrate to accommodate copper detail changes. The original copper installations lacked underlayment. To minimize changes in the manner that the roof envelope behaves, breathable underlayment was used to the greatest extent possible.

Approximately 127,000 pounds of copper were recycled and portions of the copper were salvaged for reuse in the Kansas Statehouse’s new visitor center. MG McGrath performed the fabrication and installation of 65,250 square feet of sheet metal on the roof. Low-slope areas of the central roof, which were originally clad with standing seam, were re-clad with 20-ounce soldered flat-seam copper to provide a more watertight roof. To meet the aggressive schedule, roofs were sequenced to allow for tear off and substrate repairs to occur while sheet-metal installation crews worked on another roof.

DETERIORATED SUBSTRATE required repairing structural framing and the wood and masonry decks. Work on the 21,300 square foot dome was performed by Baker Roofing with custom fabrication of the ornamental trim and windows performed by Ornametals. A 365-foot-tall, free-standing tower crane was used to deliver materials and equipment. Crews worked in a spiraling pattern from the bottom of the dome up to sequence tear-off, substrate repairs and sheet-metal installation.

Standing-seam 20-ounce copper cladding was used for radius components at the base and top of the dome. The distinctive horizontal seamed panels used in the original construction were replicated in 20-ounce copper, and templates were created for each panel to account for differences in the compound curvature and spacing of the attachment points. In total, the dome required 230 linear feet of built-in monumental gutter constructed from 32-ounce copper and 752 linear feet of 24-ounce copper rib moulding.

PHOTOS: ARCHITECTURAL FOTOGRAPHICS/TREANOR ARCHITECTS

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Projects: Hospitality & Entertainment

Refinery Hotel, Manhattan

The lean-to-enclosure features a bi-parting roof measuring 24 feet 4 inches by 40 feet 5 inches with a 40-foot 5-inch- by 12-foot 5 1/2-inch-high front wall.

The lean-to-enclosure features a bi-parting roof measuring 24 feet 4 inches by 40 feet 5 inches with a 40-foot 5-inch- by 12-foot 5 1/2-inch-high front wall.

Team

Retractable roof designer, manufacturer and installer: OpenAire, Oakville, Ontario, Canada
Architect: Stonehill & Taylor Architects and Planners, New York

Roof Materials

The lean-to-enclosure features a bi-parting roof measuring 24 feet 4 inches by 40 feet 5 inches with a 40-foot 5-inch- by 12-foot 5 1/2-inch-high front wall. Installation is along a 7.72-degree slope. The four dividing roof sections each measure 10 feet. Two sections bi-part up to 50 percent from the center, moving outward and “parking” over the fixed end bays.

Roof Report

Located in Manhattan’s Fashion District, Refinery Hotel welcomes guests to its rooftop, which opened in June 2013. The industrial aesthetic of Refinery Hotel extends onto the rooftop, where cocktails can be enjoyed within three distinct lounge spaces: indoor, outdoor and a space “in-between” that features the integrated bi-parting skylight/roof. The retractable glass roof enhances the view of New York’s city sunsets and allows guests to take in the skyline, including the Empire State Building.

“The rooftop has a warm industrial aesthetic for which the skylight was a perfect complement,” says Christina Zimmer, principal at Stonehill & Taylor Architects and Planners. “The massive skylight brings the outside in and vice versa while sheltering guests from the elements.”

The retractable glass roof enhances the view of New York’s city sunsets and allows guests to take in the skyline, including the Empire State Building.

The retractable glass roof enhances the view of New York’s city sunsets and allows guests to take in the skyline, including the Empire State Building.

Pinky Vaid, owner of Refinery Hotel, adds: “The retractable skylight has become a focal point for our guests with evening hours spent enjoying access to the Manhattan skyline. OpenAire enabled us to realize our original vision for the rooftop, from conception to execution of the finest details.”

Photos: OpenAire

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Nashville, Tenn., Begins Revitalization of Its City Center with a New Convention Space that Features a Truly Unique Roof

It isn’t often that a nightmare becomes a pleasant reality. Andy Baker, vice president of Raleigh, N.C.- based Baker Roofing, recalls the year he spent as project manager for the roofing of the new Music City Center in Nashville, Tenn., as one of his most challenging jobs. “The logistics, a tight spot downtown, the size of the project and everything that goes along with that—thousands of people trying to work and everyone needs their material in that area at the same time. Even the unique shape of the building made it hard,” Baker remembers. “We’re glad it’s done and we can look back on it now and say: ‘Wow! We did that.’”

The Music City Center was built to be the catalyst for more development in the SoBro neighborhood of Nashville, Tenn. It is intended to create a diverse economy that won’t be affected if flooding occurs, like in May 2010.

The Music City Center was built to be the catalyst for more development in the SoBro neighborhood of Nashville, Tenn. It is intended to create a diverse economy that won’t be affected if flooding occurs, like in May 2010.

Baker and his crew of up to 50 roofing workers have much to be proud of. The completed project is the largest capital construction project in Nashville’s history and was designed to bring prosperity to the area known as SoBro, or South of Broadway, which was affected by massive flooding in May 2010. The Music City Center lies outside the flood-prone areas and hopefully will be the catalyst for more development, which will create a diverse economy that won’t be affected if another flood occurs.

In addition to the Music City Center’s imaginative design that resembles various musical instruments, the building boasts a number of features that are ideal for a high-profile project. Many of these features are located in the most opportune of places—the roof. An Energy Star-qualified thermoplastic PVC membrane covers the 643,752-squarefoot roof while a 186,700-square-foot vegetated roof literally mimics the rolling hills of Tennessee’s Highland Rim. The rooftop also hosts a 211-kilowatt solar-power system on the 1-acre area that is over the Grand Ballroom, a rooftop space that resembles an acoustic guitar in shape. Lastly, the roof collects rainwater that is funneled to a 360,000-gallon tank before it is used to irrigate the site and flush hundreds of toilets inside.

Construction Challenges

Baker and his colleagues knew the Music City Center would present many challenges even before work began. “We knew it was going to be a logistical nightmare going in but then you have to live it,” he recalls. “You would think four city blocks would be a large enough area to work from but there were thousands of contractors working and receiving materials at the same time. Trying to keep truck drivers and suppliers happy was difficult. The community was great though; there were a lot of police officers around to direct traffic.”

Baker Roofing's team of up to 50 roofing workers spent one year working on the Music City Center.

Baker Roofing’s team of up to 50 roofing workers spent one year working on the Music City Center.

Installation also proved perplexing because of the roof’s undulating slopes of 1/4:12 to 12:12. Baker likens the rolls to waves and points out in some places they were almost conical in shape. In the areas in which there was no vegetated roof, the crew fastened two layers of 1.7-inch polyisocyanurate insulation followed by 1/4-inch roof board. Then a 60-mil thermoplastic PVC membrane in a light gray color was fully adhered to the assembly. The membrane features a lacquer coating to reduce dirt pickup.

Photos: Keri Baker

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Best Roofing Projects of the Carolinas

We celebrate the best roofs installed in North and South Carolina with our final issue of Carolinas Roofing. From metal to shingles to single ply and coatings, these roof coverings protect newly built and reroofed schools, homes, manufacturing facilities, city-service buildings and more.

Judy W. Rose Football Center-Fieldhouse and the McColl-Richardson Field Press Box, University of North Carolina, Charlotte

Judy W. Rose Football Center-Fieldhouse and the McColl-Richardson Field Press Box, University of North Carolina, Charlotte

Judy W. Rose Football Center-Fieldhouse and the McColl-Richardson Field Press Box, University of North Carolina, Charlotte

Team

Roofing contractor: Baker Roofing Co., Charlotte, www.bakerroofing.com
Designers: Jenkins-Peer Architects, Charlotte, www.jenkinspeer.com, and DLR Group, www.dlrgroup.com
Construction manager: Rogers PCL Russell, a joint venture of Rodgers Builders Inc., Charlotte, www.rodgersbuilders.com; PCL Constructors Inc., Charlotte, www.pcl.com; and H.J. Russell & Co., Atlanta, www.hjrussell.com
Metal roofing manufacturer: McElroy Metal, Bossier City, La., www.mcelroymetal.com

Roof Materials

New metal roofing matches the campus scheme on many other buildings. It also offers overall longevity, durability and low-maintenance features.

The field house and press box are covered with 11,000 square feet of Maxima 216, 24-gauge Kynar in Slate Gray and 4,000 square feet of 24-gauge flat stock metal roofing and low-slope roofing trim.

Roof Report

2013-14 is the first year for Charlotte 49ers football. This new 15,000-seat stadium was built for the new team and is designed to be expanded to 40,000 seats. The main building, the Judy W. Rose Football Center-Fieldhouse, located in the south end zone, has been named after the university’s longtime athletic director.

The stadium includes several other buildings, including the McColl-Richardson Field Press Box, named in honor of Hugh McColl, former Bank of America CEO, and Jerry Richardson, owner of the NFL’s Carolina Panthers.

Photo courtesy of McElroy Metal, Bossier City, La.

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