Concrete: material of choice.The tower being erected at 505 Fifth Ave. is proof that cast-in-place reinforced concrete reinforced concrete Concrete in which steel is embedded in such a manner that the two materials act together in resisting forces. The reinforcing steel—rods, bars, or mesh—absorbs the tensile, shear, and sometimes the compressive stresses in a concrete can be the material of choice of commercial builders in Manhattan, said panelists at a NYC NYC abbr. New York City NYC New York City Concrete Promotional Board seminar last week. Construction began on the 26-story tower, designed by Paul Katz Paul Katz is an American cellist. He is known to concertgoers the world over as cellist of the Cleveland Quartet, which during an international career of 26 years, made more than 2,500 appearances on four continents. , of Kohn Pederson Fox, last month. The construction manager is Pavarini McGovern LLC (Logical Link Control) See "LANs" under data link protocol. LLC - Logical Link Control . The approximately 300,000 s/f commercial office and residential building at 505 5th Avenue is a cast-in-place reinforced structure, comprising of reinforced slabs, columns and shear walls shear wall In building construction, a rigid vertical diaphragm capable of transferring lateral forces from exterior walls, floors, and roofs to the ground foundation in a direction parallel to their planes. Examples are the reinforced-concrete wall or vertical truss. . An 11-inch reinforced concrete slab spans between columns at 30 foot on center. Enlarged 22-inch column capitals are used to reduce deflections for the large spans. Large 15-foot cantilevers exist at the upper typical floors, where the columns are placed away from the building perimeter. The columns used high-strength concrete (12,000psi PSI - Portable Scheme Interpreter ) to minimize column size. The main tower columns are 36 inches in diameter round columns up to the 15th floor and 28-inches above. The lower typical floor perimeter columns are 30 inches in diameter. Three factors led to the decision to use reinforced concrete for structural framing--new super-high compression materials, terrorism/safety concerns after 9/11 and economics, said many on the panel. After cost comparison between concrete and steel for the structural framing, pricing was similar, but other factors had to considered, said Tony Leichter, Kipp Stawski Management, owner of the building. "Using concrete is one stop shopping," said Leichter. "We very much like the availability of local materials and the shipments into New York City New York City: see New York, city. New York City City (pop., 2000: 8,008,278), southeastern New York, at the mouth of the Hudson River. The largest city in the U.S. . It gives us a feeling we are in control of the market." With the accessibility of material the developer can make changes to floor plans, whereas with steel framing the materials are ordered in bulk and not easily reordered, said Jacob Grossman, P.E., F.A.C.I. at Rosenwasser Grossman. "There is a tremendous amount of flexibility with concrete," said Grossman. "If we go with another floor, within 24 hours we will have the go ahead to build. You are able to do changes with concrete at the last minute. This to a developer is a big plus. If this was structural steel building, you would have the material already." However, concrete for structural framing isn't the choice for many developers in the city, but the Concrete Board is trying to change the perception that steel is a better material for structural framing. "I am here today because three years ago I saw rendering of what was to be the new World Trade Center," said Vincent DeSimone Vincent J. DeSimone, Jr. (1918 – 1979) was the Chief of Detectives of Passaic County, New Jersey, USA. In 1966, he became known as the lead detective in the homicide case at Lafayette Grill, Paterson, New Jersey. , DiSimone Consulting Engineers. "We are going to lose participation in this project because we have not promoted reinforced concrete." Concrete can be the material of choice, if builders are educated on the benefits on the material, said DeSimone. "It's an urban legend Myths about anything and everything that barely have a shred of truth in them, yet seem to take on a persistent life of their own. Before the Internet, such urban folklore as "alligators in New York City sewers" was carried in magazines and newspapers. that long span office buildings have to steel," he said. "That's bull." Some of the benefits are increased sound proofing of buildings, speed of construction and the overall safety of the building, said panelists. |
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