CompositesWorld
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NEWS 39 CompositesWorld.com THE COMPOSITES PODCAST CW Talks: The Composites Podcast CW Talks is a biweekly podcast that highlights the people, processes and technologies shaping the world of composites. Interviews feature guests with expertise and insight about where composites have been, where they are and where they are headed. Hear the stories behind the successes of the leaders and innovators in the composites industry. Download CW Talks on iTunes or Google Play today! Listen in! CompositesWorld.com/podcast CFRP in Construction placed, each anchored with a square of C-GRID. Finally, the 3-inch /76.2-mm thick interior concrete wythe was troweled on (Step 4, p. 37). e Metromont production crew could make one panel in about an hour. e panels then cure until the concrete reaches a stripping strength — strength at which formwork can be removed — of 4,000 psi, which takes roughly 10 hours. e panel forming bed is then set up to cast again the next day. Spence explains that where the C-GRID trusses are placed is defined by the EOR, based on the wall system structural require- ments and other considerations for each project. "Generally, the C-GRID shear webs are placed 2 ft [0.6m] apart," he notes. Non- loadbearing walls require fewer C-GRID connections, so they can be spaced further apart. For the GSU project, however, every panel was loadbearing. As panels were completed, they were loaded onto trucks for just-in-time delivery to the job site. "We staged production to make sure that erection of the walls and floors proceeded per the plan," says Spence. At the building site, panels were lifted with a crane and set into place (Step 5, p. 37). "ere were metal plates or angles embedded in the vertical wall panels and horizontal floor panels," Spence explains. "ese were welded together to form the wall-to-floor connections. e resulting box structures comprise the building. When the welding was finished, structurally, the building was complete." He notes that a final layer of concrete was poured on top of the installed floor panels to cover the welded connection details. e precast structure — including 1,803 pieces and 200,670 ft 2 (18,643m 2 ) of C-GRID panels — was erected in five months by a six-man crew. "After about one month into this process, Choate began bringing in other trades," says Spence. is allowed the contractor to jumpstart installation of electrical, plumbing and interior finishing systems (Steps 6 & 7, p. 37) in order to complete the dormitory for the start of the 2016 school year. Continued drive for efficiency e GSU Piedmont Central dorm is just one example of the CarbonCast system's success based on C-GRID. "We've converted all of our vertical wall panels to this system," says Spence. "We just finished building apartments in Tampa, Florida, using these panels," he adds, "because C-GRID walls can with- stand 200-mph hurricane winds. at is a tough building code Read this article online | short.compositesworld.com/C-GRID-GSU See more in an Altus Group C-GRID video | short.compositesworld.com/C-GRIDvid Read online CW's report titled, "Pultrusion provides composite thermal break" | short. compositesworld.com/ThermBrk