3GRACE BUILDINGSKYSCRAPPER Ft.YEAR BUILT – 1971 to 197450 STORY BUILDINGCONSISTS OF OFFICE – 1,557 & RETAIL – 20DISTINCTIVE FEAUTURE:CURVED TOWER WALLTHAT ARE SET BACK TO PROVIDE AN ATTRACTIVE AND ACCESIBLE SPACETHE WALL IS MADE OFTINTED GLASS WINDOW AND WHITE TRAVERTINE LIMESTONE – STONE PANELCLADDING CONNECTIONSIBLING OF SOLOW BUILDINGFAÇADE - DESIGNED BY GORDON BUNSHAF
4W.R. GRACE BUILDINGTRAVERTINE, A FORM OF LIMESTONE, IS USED FOR THE GRID PATTERN THAT COVERS THE SPACE BETWEEN WINDOWS IN THE GRACE BUILDINGTRAVERTINE IS A TERRESTIAL SEDIMENTARY ROCK. COMMONLY USED FOR FAÇADE, WALL CLADDING, BACKSPLASH AND FLOORING.THE USE OF TRAVERTINE MAKES THE GRACE BUILDING APPEAR MORE BRIGHTER THAN ITS SURROUNDING AND THE WHITE COLOR CONTRAST THE DARK WINDOWSTRAVERTINE MARBLETRAVERTINE STONE
5STONE LITE PANELSOFFERS STRUCTURAL SUPERIORITY, IT’S NATURAL, TEXTURES, COLORS, FLEXIBLE SIZES SHAPE & DESIGN, ELEGANT FINISH ANDARE GOOD FOR INCORPORATING IN CURTAINWALL RAIN SCREENS, CORNICE, BALCONIES, CANTALIEVER STRUCTURES, LARGE FREE –SPAN CEILINGS, CURVE STRUCTURE AND MORE.
10AIR BARRIER SEALANTS, RAIN PENETRATION AND MOISTURE CONTROL Use appropriate sealant for the environment in which it is expected to perform. Consider the environment that it will perform. Failure to consider these factors may result in adhesive failure, cohesive failure, craze cracking, hardening, disintegration, color changes, or other types of permanent failure.Each project requires its own careful sealant consideration and application.STONE VENEER/PANELS ARE STRONG AND DURABLE BUT THEIR WEAK POINT ARE THE JOINTS – IT NEEDS TO BE SEALED SO THAT WHEN WATER WONT SIP THROUGH OR THE WATER CANNOT DAMAGE ITWork cited -
12Precast Concrete Panels Air Barriers & Sealants A one-stage joint in a precast panel wall system. In the so-called face seal approach, a single line of defense is employed against both rain penetration and air leakage.Precast Concrete Panel - One-Stage JointsA two-stage joint in a precast panel. The outer rain seal serves to control water leakage due to kinetic energy. Any rainwater that does penetrate the rain barrier drains to the outside, before it is able to reach the air seal.Precast Concrete Panel - Two-Stage Joints12
13Precast Concrete Panels Attachment Systems & Fire Safety Weld PlatesThe most common method of attachment of precast members is by use of steel weld plates. Typically, the precast members have embedded plates that can be used as welding surfaces for loose connecting plates or angles.Rebar and GroutUsed typically with slabs, reinforcing bars are spliced into slabs and grouted in place
14Jubilee Church Precast Concrete Panels Case Study: Architect: Richard Meier & PartnersDesign Team: Richard Meier, FAIA, John Eisler, Matteo Pericoli, Alfonso D’OnofrioThe church has three curved walls resembling of a ship's sails, as it symbolizes "the ship in which the people of God sails."The church has large glass surfaces that guarantee a generous flow of natural light, located both at the top and at the main and back facades.In order to preserve the whiteness of the building, the company Italcementi developed a new cement containing titanium dioxide, called TX Millennium, which ensures the whiteness of the concrete, despite the pollution, rain and weather effects.TX Millennium cement is formulated with photo-catalytic properties to deliver self-cleaning power. As a result, organic pollutants that settle on the surface of the concrete are decomposed into oxygen, water, and carbon dioxide.
15Jubilee Church Precast Concrete Panels Case Study: The outer sail is composed of 78 segments, the intermediate of 104 and the inner, which reaches 26 meters, of 176 segments.The builder had to invent a mechanism to manipulate the pieces and put them in place.
16Beinecke Rare Book and Manuscript Library Precast Concrete Panels Case Study:Beinecke Rare Book and Manuscript LibraryArchitect: Gordon Bunshaft of Skidmore, Owings, & MerrillLocation: New Haven, ConnecticutClient: Yale UniversityProject Area: 125,262 square feetProject Year: Completed in 1963
17Beinecke Rare Book and Manuscript Library Precast Concrete Panels Case Study:Beinecke Rare Book and Manuscript LibraryMade of Vermont marble and granite, bronze and glass, the exterior gives the illusion that the building is completely solid when viewed from the outside.Yale University’s Beinecke Rare Book and Manuscript Library is the largest building in the world dedicated to the containment and preservation of rare books, manuscripts, and documents.
18Precast Concrete Panels Rain Penetration & Moisture Control A rainscreen is the first line of defence against wind-driven rain, and as such is subjected to all forces leading to rain penetration through its openings and imperfections.
19Precast Concrete Panels Air Barriers & Sealants Moisture ProtectionThe most common moisture protection system used with precast concrete wall systems is a barrier system incorporating an adequate joint seal. In some cases where additional moisture protection is needed, the application of a sealer or a concrete coating is also used. Sealers can be either clear or pigmented if used as an enhancement of the precast appearance. Film-forming coatings usually offer a higher level of performance but will have a significant impact on the appearance of the precast concrete unit.The precast concrete panel should also be designed to provide the appropriate level of durability for the planned exposure. Durability can be improved by specifying minimum compressive strengths, maximum water to cement ratios, and an appropriate range of entrained air.