601 4th Avenue Schematic Design Project Specification March 2009 ...

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601 Fourth Avenue DESIGN DEVELOPMENT SPECIFICATION Seattle, Washington 044300 – STONE EXTERIOR CLADDING Page 1 of 3 PART 1 - GENERAL 1.1 SECTION REQUIREMENTS A. Summary: .1 Quarried cut stone in exterior wall cladding. .2 Associated flashings and supports B. Related Sections: .1 Section 055000 – Metal Fabrications. 1.2 DESIGN REQUIREMENTS A. Design and engineer stone cladding to be gravity supported on steel supports anchored to concrete building structure or to secondary steel structure, to transmit the loads. B. Design steel support structure to applicable requirements of Section 05500 Metal Fabrications. C. Design stone cladding assembly to direct water collecting behind the stone to the outside. D. Mortar Joints: Open with back part of joint filled with mortar. E. Pattern Arrangement: Panels to be arranged with veining and other natural markings acceptable to Architect. 1.3 SUBMITTALS A. Product Data, Shop Drawings and Samples: .1 Data on stone units including chemical analysis. .2 Range samples to indicate quality of color matching. .3 Samples for stone and framing. .4 Shop Drawings to include setting drawings. .5 Material test reports. 1.4 QUALITY ASSURANCE A. Perform work to National Building Granite Quarries Association's document Specifications for Architectural Granite. B. Fabricator and Installer: Company specializing in performing the specified work with minimum 5 years successful experience. C. Execute work by skilled mechanics experienced with the kind and form of stone and installation method indicated. D. Initial Stone Selection: .1 To be selected from uncut stone at quarry by Architect in presence of stone supplier, to verify desired appearances. Supplier to verify sufficient quantities, inclusive of reserves for breakage. .2 Subsequent pieces to be selected from cut blocks following Architect’s verification at quarry. E. Field Mock-Up: Sample wall panel 10 linear ft by floor-to-floor height, for verification of appearance, material qualities and execution. Include associated trim and masonry accessories. Test sealants, sealant compatibility and adhesion on mock-up. 19 December, 2008 Foster + Partners
601 Fourth Avenue DESIGN DEVELOPMENT SPECIFICATION Seattle, Washington 044300 – STONE EXTERIOR CLADDING Page 2 of 3 F. Field Quality Control Benchmark: First installation of structural bay of each type of stone including trim. G. Source Quality Control: Single quarry source for each stone type. Single source for mortar, stone accessories, sealants, and associated materials. PART 2 - PRODUCTS 2.1 STONE A. Stone: Natural, quarried, free of efflorescence per ASTM C 6750. B. Granite: To ASTM C 615. C. Stone Colors and Finishes on Exposed Faces and Ends: To match Architect’s samples. D. Face Dimensions: As indicated. E. Thickness: To suit application, unless otherwise indicated. 2.2 MORTAR A. To ASTM C 270, Proportion Specification, Type applicable for setting and pointing and to suit type of selected stone. Pointing mortar color as selected by Architect. B. Admixtures: Type acceptable to Architect. 2.3 AUXILIARY MATERIALS A. Stone Accessories: Setting buttons, setting shims, ties and reinforcement. Anchors to be of stainless steel. Wire tiebacks to be copper-, bronze-, or brass-alloy wire. B. Anchor Support Framing: Roll-formed steel channels, galvanized to ASTM A 653/A 653M, G90. C. Weep Holes: Round polyethylene tubing, purpose made. D. Stone Cleaners: As recommended by National Building Granite Quarries Association's document Specifications for Architectural Granite, as applicable. E. Concealed Flashings: Self-adhesive sheets: of SBS modified bitumen laminated to high-density polyethylene film, minimum 40 mils thick. F. Flashing lap adhesives, control joint fillers. G. Extruded-Polystyrene Board Insulation: Rigid, cellular, polystyrene thermal insulation to ASTM C 578, Type IV, R-value of 5.6. H. Sealer: Hydrophobic water-based impregnating no-sheen sealer suitable for natural stone. Sealer shall protect the stone from staining during setting and grouting process and allow evaporation of water from setting materials. I. Sealant: Clear silicone type. 2.4 STONE FABRICATION A. Cut stone to produce pieces of thickness, size, and shape indicated. 1. Fabricate stone to comply with recommendations of National Building Granite Quarries Association's document Specifications for Architectural Granite, as applicable. 19 December, 2008 Foster + Partners
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