b'The new checked bag inspection system 48 LGBTERMINAL/BAGGAGE replaces a temporary system installed after the 9/11 terror attacks. create expansive works of art in mosaic tile. Clements createdLiterature from the American Concrete Institute explains that compositions of a large global map, birds, a ship, an oil well and athe impact created by the application consolidates the concrete. rotary-dial telephone, which were installed on the terminal floor asAlthough the hardened properties of shotcrete are similar to tributes to community pillars. At some point, the airport authoritythose of conventional cast-in-place concrete, the nature of opted to cover up the historic mosaics with wall-to-wall carpet,the placement process results in an excellent bond with most and they remained cloaked for years.substrates, and rapid or instant capabilities, particularly on During Phase 1, crews uncovered the tile creations, polishedcomplex forms or shapes. The shotcrete process requires less the hidden treasures, and the mosaics again became a focal pointformwork and can be more economical than conventionally for the historic terminal. With more improvements underway, theplaced concrete.mosaics still serve as a testament to the airports rich history. Unexpected ChallengesRetrofitting the Original Terminal Stephan Lum, engineering officer at LGB, The new $25.5 million checked bag inspection system at LGBnotes that the original terminal is a local replaces a temporary system installed after the terror attacks oflandmark. As such, construction plans Sept. 11, 2001. The improved facility spans 6,545 square feet andretained the porte cochere, portholes and the connects to the ticketing building. In addition to providing a morewest facehallmarks of the original terminal efficient workspace for TSA personnel, the project also restoreddesign. STEPHAN LUMaccess to the west side of the historic terminal, revealing its We are going to restore the west face to its former glory, classic design. Lum reports. Often, if you bring up the word historic, a lot of The original terminal building was also due for a seismiccontractors get nervous because youre dealing with decades of retrofit to help it withstand shakeups from occasionalinfrastructure and things you didnt expect pop up. earthquakes. The Corgan team created a plan that required aIn fact, crews discovered a number of underground utility minimal amount of remediation or the need to cut or drill holes incables and equipment that were undetectable by ground the original structure. Corgan and Swinerton also worked togetherpenetrating radar (GPR) scans. Finding and relocating the utilities to develop layers of protection for the historic terminal. was one of the biggest unknowns we came across, he reflects. The existing building is made fromThere are limitations to GPR scanning, and you just have to be concrete with light steel inside, which doesntvery careful when excavating, working with the design team to perform as well in an earthquake, saysfind solutions. Corgan Principal John Mares. Our designAcosta credits the design-build process, which allowed airport team looked at ways to retrofit this iconicstaff to review progress and offer feedback along the way, for building and developed a method that useshelping the team successfully navigate unexpected challenges. high-tech composite materials like carbonMares notes that Corgan uses nondestructive investigation for fiber and other reinforced types of structures.JOHN MARES utility discovery whenever possible. For example, Swinerton used shotcrete (concrete that isFor a facility as old as this one, there were a lot of things that pumped at high velocity through a nozzle and dries quickly) towere not documented or recorded, Mares says. Ultimately, you reinforce the structure. November |December 2022AirportImprovement.com'