David L. Lawrence Convention Center (Pittsburgh Convention Center) South Terrace
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The David L. Lawrence Convention Center greenroof; Photo Courtesy Carlisle SynTec, By: TJ Willetts of Burns & ScaloProject Name: David L. Lawrence Convention Center (Pittsburgh Convention Center) South Terrace
Year: 2011
Owner: The Sports & Exhibition Authority of Pittsburgh and Allegheny County (SEA)
Location: Pittsburgh, PA, USA
Building Type: Commercial
Type: Extensive & Intensive, Test/Research
System: Single Source Provider
Size: 22400 sq.ft.
Slope: 2%
Access: Accessible, Open to Public
Submitted by: Carlisle SynTec

Designers/Manufacturers of Record:
Construction Manager: Turner Construction/P. J. Dick/ATS
Photography: TJ Willetts, Burns & Scalo
Owners Representative Services: Oxford Development
Roof System Installation: Cuddy Roofing & Eisler Landscapes
Educational Signage & Research: The Penn State Center
Single Source Greenroof System Supplier: Carlisle SynTec Systems
Architect of Record: Rafael Viñoly Architects
Greenroof Project Design/Architects: Pashek Associates
Rainfall and Soil Monitoring System Design & Installation (with interface to irrigation controls): Civil & Environmental Consultants, Inc.
Irrigation Design: Eisler Landscapes
David L. Lawrence Convention Center; Photo Courtesy David L. Lawrence Convention CenterPhoto Courtesy Carlisle SynTec, By: TJ Willetts of Burns & ScaloThe David L. Lawrence Convention Center greenroof; Photo Courtesy Carlisle SynTec, By: TJ Willetts of Burns & Scalo
Located in downtown Pittsburgh, the David L. Lawrence Convention Center (DLCC) effectively blends unparalleled space, functionality, and flexibility with cutting-edge technology to offer meeting planners, show organizers, exhibitors, and visitors a location for an unforgettable event experience. Its iconic design takes inspiration from the historic suspension bridges that span the Allegheny River adjacent to the riverfront site, and provides the latest chapter in Pittsburgh’s long history of engineering and technological innovations. This unique steel cable structure made possible a naturally lit and column-free 250,000-square-foot (23,236-square-meter) exhibition hall," (Rafael Viñoly Architects).

With Rafael Viñoly Architects as architect of record in 2003, the DLLC was designed to achieve LEED Gold and was, at the time of completion, the largest LEED Certified building in the US. In 2011, projects like the South Terrace helped the DLCC renew its deep green credentials and contributed to the DLCC's certification as LEED Platinum for Existing Buildings.

Three programmable outdoor spaces rich in native plants allow visitors and wildlife to connect to southwestern Pennsylvania’s beautiful natural environment at the David L. Lawrence Convention Center: The North Terrace has 60,000 sqft of open outdoor space located on the fourth floor, riverside, featuring Levy Restaurants' 100% organic herb and vegetable gardens, Monarch Waystation, Edible Plants, Medicinal plants and Pollinator plants. The 40 planter boxes grow a variety of herbs, lettuces, peppers, carrots, and tomatoes using mostly seeds which have been harvested from the previous year. The Riverfront Plaza forms an integral 1,300 ft part of the Three Rivers Heritage Trail, a 22 mile recreational greenway along the Allegheny, Monongahela, and Ohio Rivers featuring over 2,000 trees, shrubs, grasses and perennials.

The South Terrace has the publicly accessible Living Roof - over 20,000 sqft of green roof space located on the third floor, cityside, featuring over 7,000 perennials, grasses, and sedums. The building composts all the organic waste. One of the most unique features about the green roof is that it is programmable, rentable space.

"Based on research gathered by the US EPA, it is estimated that the South Terrace Green Roof will remove almost 680 pounds of particulate matter from the air annually, which is approximately equivalent to the annual emissions of 255 passenger vehicles," (2013 Green Report David L. Lawrence Convention Center).
The David L. Lawrence Convention Center greenroof; Photo Courtesy Carlisle SynTec, By: TJ Willetts of Burns & ScaloThe David L. Lawrence Convention Center greenroof; Photo Courtesy Carlisle SynTec, By: TJ Willetts of Burns & Scalo
Designed by Pashek Associates in 2011, the greenroof was designed to retain up to 80% of the annual rainfall by incorporating both extensive and intensive Roof Garden sections. The extensive sections are vegetated using sedum mats while the intensive sections are vegetated using 75 different native and adaptive plant species. The Roof Garden with its water-jet cut blue glass paver plaza area reflects the nearby Allegheny River and speaks to the stormwater benefits of green roofs, creating a highly usable space that can be used by visitors or for special events.

The David L. Lawrence convention center incorporates one of Carlisle SynTec's most robust single-ply roofing systems. Installed over a concrete deck, the first layer of the roofing system consists of adhered Insulfoam EPS insulation board to achieve the desired R-value.

Next was the installation of a 1/2" rigid coverboard which is fully adhered to the insulation board. International Leak Detection's EVFM grid was then used above the coverboard to test the waterproof integrity of the system once the membrane was installed. Carlisle's 135-mil Sure-Weld® TPO FleeceBACK membrane was then installed directly over the coverboard and EFVM grid using Carlisle FAST® low-rise polyurethane foam adhesive.

Carlisle's extensive and intensive Roof Garden systems were then installed over the membrane. Carlisle's extensive Roof Garden system is comprised of Carlisle's MiraDRAIN G4 4-in-1 drainage composite which is place directly over the membrane. 4" of Carlisle extensive growth media was installed over the MiraDRAIN G4 and topped off with Carlisle Sedum Mats. The intensive section consists of Carlisle's MiraDRAIN G4 drainage composite followed by 8" of Carlisle intensive growth media and native plant species. The Hanover Pavers were installed over Insulfoam EPS to create a level walking surface.

"The Penn State Center was instrumental in helping the Sports and Exhibition Authority work through the process necessary to install a green roof on the David L. Lawrence Convention Center. As a follow up, the Center designed and installed educational signage to help local citizens and convention visitors identify plants used on the roof in this project. The convention center's green roof is one of several in which Penn State faculty and students are actively researching multiple aspects of green roof performance, including stormwater management, energy balance, plant selection, plant performance, media components, roof system components and management, and materials testing," (The Penn State Center).

See the David L. Lawrence Convention Center Building Features webpage
here.

Additional thumbnail photos:

The David L. Lawrence Convention Center greenroof; Photo Courtesy Carlisle SynTec, By: TJ Willetts of Burns & ScaloPhoto via InvestPA.The David L. Lawrence Convention Center greenroof; Photo Courtesy Carlisle SynTec, By: TJ Willetts of Burns & ScaloThe David L. Lawrence Convention Center greenroof; Photo: heartlandgardening http://heartland-gardening.com/2014/09/15/trendspotting-greening-of-pittsburgh/The David L. Lawrence Convention Center greenroof; Photo Courtesy Carlisle SynTec, By: TJ Willetts of Burns & Scalo
The David L. Lawrence Convention Center is located at 1000 Fort Duquesne Blvd, Pittsburgh, PA 15222; 412.565.6000; visit their website and specifically their Green First at the DLCC page. Watch the 2:21 video David L. Lawrence Convention Center - Project of the Week 3/30/15 from Greenroofs.com on the greenroofsTV channel on YouTube and the Green Roof Virtual Tour from the David L. Lawrence Convention Center. See the case studies from Rafael Viñoly Architects; Pashek Associates; Carlisle SynTec (4 pages); Cuddy Roofing; Eisler Landscapes; Oxford Development; and Sports & Exhibition Authority (SEA).

Read the March 25, 2014
Convention Center Green Roof Wins Honor Award from Pashek Associates; the 2013 Green Report David L. Lawrence Convention Center from SEA; September 22, 2013 Green Roofs – Pittsburgh Convention Center by Pamela Turner in the UGAGreenWay; May 10, 2012 Pittsburgh’s David L. Lawrence Convention Center Gains Platinum LEED® Certification Press Release from SEA; September 15, 2011 Vegetable Garden Grows Atop David L. Lawrence Convention Center by Dave Crawley in CBS Pittsburgh, including a 1:52 video; and the May 11, 2012 Convention center earns highest 'green' cred: platinum LEED rating by Mark Belko in the Pittsburgh Post-Gazette. For more information on this project, please contact Richard Stever, Roof Garden Product Specialist, Carlisle SynTec at: stever@carlisleccm.com. The David L. Lawrence Convention Center is featured in Greenroofs.com’s brand new 2015 Wallpaper Projects Gallery. Download yours for free.

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