Division 22 23 Ebook Page 160 Washington DC Convention Center Case Study

magnified by the fact that the Convention Center is two city blocks wide and six city blocks long. "It's just like it is anywhere else these days," says Sisk. "They are all challenging, but in this case the amount of material and the movement of materials is especially challenging. And everything is up in the air; quite high, as a matter of fact. A lot of the work on the job must be done out of lifts; there is very little ladder work on that entire job." Kamco Supply Corporation is supplying the exterior framing and interior package, and they are just getting started with the interior work, which couldn't begin until the exterior envelope was complete. Weiss says his company will supply more than a million square feet of Owens Corning products, including both fiberglass and mineral wool insulation. Applications include sound attenuation, fire safety and thermal performance. "It's an enormous undertaking," says Weiss. "It's going to take quite a bit of manpower to supply. It's a good job for us. The steel framing and interior metal will total about 3 million lineal feet. The drywall alone is about 6 million square feet. "We haven't even scratched the surface yet," he continues. "We'll be down there every day for many months." A Road Runs Through It One special feature of the new Washington Convention Center will be an underground plaza which goes right through the middle of the building. There will be exhibit and meeting space above the plaza, and a heated work area below. Exhibitors and others will be able to bring tractor-trailers into the center of the building to unload their displays and convention supplies. Because parts of the plaza will be exposed to the elements and have heated areas underneath them, contractors are pouring concrete over Owens Corning Foamular 1000 extruded foam insulation. Workers will first pour a concrete slab floor, then add a hot-fluid-applied waterproofing membrane, top that with Foamular 1000, and then pour a topcoat of concrete. "It's a roadway that's also a roof," says Steve Gordon, sales representative for Foamular insulation. "That's really what it is. They have to insulate the plaza deck because there is heated space under it." Gordon says the job was originally designed for 60-pound board but there were concerns about the compressive strength of the

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