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2. Trade names herein denote grade, type and quality of material required.
<br />2.2 GLASS MATERIALS
<br />A. Annealed Float Glass: ASTM C 1036, Type I (transparent glass, flat), Quality q3 (glazing select); class as indicated in schedules
<br />at the end of Part 3.
<br />B. Heat -Treated Float Glass: ASTM C 1048; Type I (transparent glass, flat); Quality q3 (glazing select); class, kind, and condition
<br />as indicated in schedules at the end of Part 3
<br />1. Fabrication Process: At manufacturer's option.
<br />2.3 GLAZING SEALANTS
<br />A. General: Provide products of type indicated, complying with the following requirements:
<br />1. Compatibility: Select glazing sealants that are compatible with one another and with other materials they will contact,
<br />including glass products, seals of insulating -glass units, and glazing channel substrates, under conditions of service and
<br />application, as demonstrated by sealant manufacturer based on testing and field experience.
<br />2. Colors of Exposed Sealants: As indicated.
<br />B. Elastomeric Glazing Sealant Standard: Comply with ASTM C 920 and other requirements indicated for each liquid -applied,
<br />chemically curing sealant in the Glazing Sealant Schedule at the end of Part 3, including those referencing ASTM C 920 classifica-
<br />tions for type, grade, class and uses.
<br />1. Additional Movement Capability: Where additional movement capability is specified in the Glazing Sealant Schedule,
<br />provide products with the capability, when tested for adhesion and cohesion under maximum cyclic movement per ASTM C
<br />719, to withstand the specified percentage change in the joint width existing at time of installation and remain in compliance
<br />with other requirements in ASMT C 920 for uses indicated.
<br />C. Cylindrical Backing: ASTM C 1330, Type O (open -cell material), of size and density to control glazing sealant depth and other-
<br />wise produce optimum glazing sealant performance.
<br />2.4 GLAZING TAPES
<br />A. Back -Bedding Mastic Glazing Tape: Preformed, butyl -based elastomeric tape with a solids content of 100 percent with or without
<br />spacer rod as recommended in writing by tape and glass manufacturers for application indicated and complying with ASTM C
<br />1281 and AAMA 800 for products indicated below:
<br />1. AAMA 804.3 tape, where indicated.
<br />2. AAMA 806.3 tape, for glazing applications in which tape is subject to continuous pressure.
<br />3. AAMA 807.3 tape, for glazing applications in which tape is not subject to continuous pressure.
<br />B. Expanded Cellular Glazing Tape: Closed -cell, PVC foam tape; factory coated with adhesive on both surfaces; packaged on rolls
<br />with release liner protecting adhesive; and complying with AAMA 800 for the following types:
<br />1. Type 1, for glazing applications in which tape acts as the primary sealant.
<br />2. Type 2, for glazing applications in which tape is used in combination with a full bead of liquid sealant.
<br />2.5 GLAZING GASKETS
<br />A. Compression Gaskets: Molded or extruded gaskets of type and material indicated below and of profile and hardness required to
<br />maintain watertight seal:
<br />1. Neoprene or EPDM dense compression gaskets complying with ASTM C 846.
<br />2. Silicone dense compression gaskets complying with ASTM C 1115.
<br />3. Neoprene, EPDM or Silicone soft compression gaskets complying with ASTM C 509, Type I I, black.
<br />2.6 MISCELLANEOUS GLAZING MATERIALS
<br />A. General: Provide products of material, size, and shape complying with referenced glazing standard, requirements of manufactur-
<br />ers of glass and other glazing materials for application indicated, and with a proven record of compatibility with surfaces contacted
<br />in installation.
<br />B. Cleaners, Primers, and Sealers: Types recommended by sealant or gasket manufacturer.
<br />C. Setting Blocks: Elastomeric material with a Shore A durometer hardness of 85, plus or minus 5.
<br />D. Spacers: Elastomeric blocks or continuous extrusions with a Shore A durometer hardness required by glass manufacturer to main-
<br />tain glass lites in place for installation indicated.
<br />E. Edge Blocks: Elastomeric material of hardness needed to limit glass lateral movement (side walking).
<br />F. Cylindrical Glazing Sealant Backing: ASTM C 1330, Type O (open -cell material), of size and density to control glazing sealant
<br />depth and otherwise produce optimum glazing sealant performance.
<br />G. Perimeter Insulation for Fire -Resistive Glazing: Identical to product used in test assembly to obtain fire -resistance rating.
<br />2.7 FABRICATION OF GLASS AND OTHER GLAZING PRODUCTS
<br />A. Fabricate glass and other glazing products in sizes required to glaze openings indicated for Project, with edge and face clearances,
<br />edge and surface conditions, and bite complying with written instructions of product manufacturer and referenced glazing stan-
<br />dard, to comply with system performance requirements.
<br />PART 3 - EXECUTION
<br />3.1 GLAZING, GENERAL
<br />A. Comply with combined written instructions of manufacturers of glass, sealants, gaskets, and other glazing materials, unless more
<br />stringent requirements are indicated, including those in referenced glazing publications.
<br />1. Clean glazing channels and other framing members receiving glass immediately before glazing. Remove coatings not
<br />firmly bonded to substrates.
<br />2. Protect glass edges from damage during handling and installation. Remove glass with edge damage or other imperfections
<br />that, when installed, could weaken glass and impair performance and appearance from Project site and legally dispose of off
<br />Project site.
<br />3. Apply primers to joint surfaces where required for adhesion of sealants, as determined by sealant compatibility and adhesion
<br />testincy
<br />4. Do not exceed edge pressures stipulated by glass manufacturers for installing glass liter.
<br />5. Provide spacers for glass lites where the length plus width is larger than 50 inches (1270 mm) unless gaskets and dazing
<br />tapes are used that have demonstrated ability to maintain required face clearances.
<br />B. Protection:
<br />I . Protect exterior lass from damn e immediately after installation b y attaching crossed streamers to framing held away from
<br />g g �' ) � g Y
<br />glass. Do not apply markers to glass surface.
<br />2. Protect glass from contact with contaminating substances resulting from construction operations, including weld splatter.
<br />C. Remove and replace glass that is broken, chipped, cracked, abraded, or damaged, including natural causes, accidents, and vandal-
<br />ism, during construction period.
<br />D. At completion this contractor shall wash and polish all glazing and clean adjacent surfaces soiled by his work.
<br />END OF SECTION 08800
<br />SECTION 09220 - PORTLAND CEMENT PLASTER
<br />PART I - GENERAL
<br />1.1 SUMMARY
<br />A. This Section includes the following:
<br />1. Portland Cement Plaster Finishes: Stucco.
<br />2. Non -load -bearing steel framing and furring.
<br />3. Metal lath and metal accessories.
<br />B. See Division 5 Section "Cold -Formed Metal Framing" for load -bearing steel framing.
<br />1.2 SUBMITTALS
<br />A. Product Data: For each product indicated.
<br />B. Samples: For each exposed finish and for each texture required upon request of the Architect.
<br />1.3 QUALITY ASSURANCE
<br />A. Fire -Test -Response Characteristics: Where indicated, provide assemblies identical to those tested for fire resistance per ASTM E 119
<br />by a testing and inspecting agency acceptable to authorities having jurisdiction.
<br />1.4 PROJECT CONDITIONS
<br />A. Environmental Requirements, General: Comply with requirements of referenced plaster application standards and recommenda-
<br />tions of plaster manufacturer for environmental conditions before, during, and after plaster application.
<br />PART 2 - PRODUCTS
<br />2.1 NON -LOAD -BEARING STEEL FRAMING
<br />A. Steel Sheet Components, General: Metal complying with ASTM C 645 requirements.
<br />1. Protective Coating:
<br />a. Interior Applications: ASTM A 653/A 653M, G60, hot -dip galvanized zinc coating.
<br />b. Exterior Applications: ASTM A 653/A 653M, G60, hot -dip galvanized zinc coating.
<br />B. Suspended Ceiling and Soffit Framing: Size metal ceiling supports to comply with ASTM C 1063, unless otherwise indicated.
<br />1. Hanger Attachments to Concrete: Anchors fabricated from corrosion -resistant materials with holes or loops for attaching
<br />hanger wires and capable of sustaining, without failure, a load equal to 5 times that imposed by construction as determined
<br />by testing according to ASTM E 488 by a qualified independent testing agency.
<br />a. Type: Postinstalled, expansion anchor.
<br />2. Wire for Hangers and Ties: ASTM A 641/A 641M, Class 1 zinc coating, soft temper.
<br />3. Carrying Channels: Cold -rolled, commercial -steel sheet with a base metal thickness of 0.0538 inch, a minimum 1/2-inch-
<br />wide flange, and in depth indicated.
<br />4. Furring Channels (Furring Members):
<br />a. Cold -Rolled Channels: 0.0538-inch bare steel thickness, with minimum 1/2-inch-wide flange, 3/4 inch deep.
<br />C. Partition and Soffit Framing:
<br />1. Steel Studs and Runners: ASTM C 645, in depth indicated.
<br />2. Cold -Rolled Channels: 0.0538-inch bare steel thickness, with minimum 1/2-inch wide flange, and in depth indicated.
<br />3. Hat -Shaped, Rigid Furring Channels: ASTM C 645, in depth indicated.
<br />2.2 LATH
<br />A. Expanded -Metal Lath: ASTM C 847.
<br />1. Material: Zinc -coated (galvanized) steel sheet, structural quality, with coating complying with ASTM A 653/A 653M, G60
<br />(Z 180) coating designation.
<br />2. Diamond -Mesh Lath: Self -furring.
<br />a. Weight: 2.5 lb/sq. yd..
<br />B. Paper Backing: Factory bonded to back of lath, complying with FS UU-B-790, Type I.
<br />1. Vapor -Permeable Paper: Grade D, Style 2.
<br />2.3 ACCESSORIES
<br />A. General: ASTM C 1063. Coordinate depth of accessories with thicknesses and number of plaster coats required.
<br />B. Metal Corner Reinforcement: Expanded, large -mesh, diamond -metal lath fabricated from zinc -alloy or welded -wire mesh fab-
<br />ricated from 0.0475-inch diameter, zinc -coated (galvanized) wire and specially formed to reinforce external corners of portland
<br />cement plaster on exterior exposures while allowing full plaster encasement.
<br />1. Zinc Alloy: Minimum 0.0207 inch thick.
<br />2. Aluminum: Minimum 0.050 inch thick.
<br />C. Cornerbeads: Small nose cornerbeads with expanded flanges of large -mesh diamond -metal lath allowing full plaster encase-
<br />ment.
<br />1. Material: Zinc alloy or aluminum.
<br />D. Casing Beads: Square -edged style, with expanded flanges.
<br />1. Material: Zinc alloy or aluminum.
<br />E. Curved Casing Beads: Square -edged style, fabricated from aluminum coated with clear plastic, preformed into curve of radius
<br />indicated.
<br />F. Control Joints: Prefabricated with removable protective tape on plaster face of control joints.
<br />1. Material: Zinc alloy or aluminum.
<br />2. Type: 2-piece, casing beads with back flanges formed to produce slip -joint action, adjustable for joint widths from 1/8 to
<br />5/8 inch.
<br />G. Corner Reinforcement: Special Stucco type woven wire corner reinforcing strips.
<br />H. Lath Attachment Devices: Material and type required by ASTM C 1063 for installations indicated.
<br />2.4 PLASTER MATERIALS
<br />A. Base -Coat Cements: Portland cement, ASTM C 150, Type I.
<br />B. Job -Mixed Finish -Coat Cement: Portland cement, ASTM C 150, Type I.
<br />C. Stucco Finish Coat: Manufacturer's standard factory -packaged stucco, including portland cement, aggregate, and other propri-
<br />etary ingredients.
<br />1. Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorpo-
<br />rated into the Work include, but are not limited to, the following:
<br />2. Manufacturers: Subject to compliance with requirements, provide products by one of the following:
<br />a. Florida Stucco Corp.
<br />b. Highland Stucco.
<br />C. IPA Systems, Inc.
<br />d. United States Gypsum Co.
<br />D. Lime: Special hydrated lime for finishing purposes, ASTM C 206, Type S; or special hydrated lime for masonry purposes,
<br />ASTM C 207, Type S.
<br />E. Sand Aggregate for Base Coats: ASTM C 897.
<br />F. Aggregate for Finish Coats: ASTM C 897 system, manufactured or natural sand, white.
<br />2.5 MISCELLANEOUS MATERIALS
<br />A. Water for Mixing and Finishing Plaster: Potable.
<br />B. Bonding Agent: ASTM C 932.
<br />C. Acid -Etching Solution: Muriatic acid (I 0 percent solution of commercial hydrochloric acid) mixed 1 part to not less than 6 nor
<br />more than 10 parts water.
<br />D. Dash -Coat Material: 2 parts portland cement to 3 parts fine sand, mixed with water to a mushy -paste consistency.
<br />E. Steel Drill Screws:
<br />I . ASTM C 1002 for fastening metal lath to wood or steel members less than 0.033 inch thick.
<br />2. Steel drill screws complying with ASTM C 954 for fastening metal lath to steel members 0.033 to 0.112 inch thick.
<br />3. Available Products: Subject to compliance with requirements, products that may be incorporated into the Work include, but
<br />are not limited to, the following:
<br />a. ChemRex, Inc., Contech Brands, PL Acoustical Sealant.
<br />b. Pecora Corp.; AC-20 FTR Acoustical and Insulation Sealant.
<br />C. United States Gypsum Co., SHEETROCI{ Acoustical Sealant.
<br />F. Three -Coat Work over Metal Lath:
<br />1. Scratch and Brown Coat Mixes: Scratch, 1 part portland cement, 0 to 3/4 parts lime, 2-1/2 to 4 parts aggregate; brown, I
<br />part portland cement, 0 to 3/4 parts lime, 3 to 5 parts aggregate,
<br />G. Two -Coat Work over Concrete Unit Masonry:
<br />1. Base Coat Mix: 1 part portland cement, 3/4 to 1-1/2 parts lime, 3 to 4 parts aggregate.
<br />H. Job -Mixed Finish Coats:
<br />1. Mixes with Sand Aggregates: 1 part portland cement, 3/4 to 1-1/2 parts lime, 3 parts sand.
<br />PART 3 - EXECUTION
<br />3.1 LATH AND FURRING INSTALLATION, GENERAL
<br />A. Standards: Comply with ML/SFA 920, "Guide Specifications for Metal Lathing and Furring," and ASTM C 1063.
<br />B. Install supplementary framing, blocking, and bracing at terminations in work and for support of fixtures, equipment services,
<br />heavy trim, grab bars, handrails, furnishings, and similar work to comply with details indicated or, if not otherwise indicated, to
<br />comply with applicable written instructions of lath and furring manufacturer.
<br />C. Isolation: Where lathing and metal support system abut building structure horizontally and where partition or wall abuts overhead
<br />structure, isolate from structural movement to prevent transfer of loading from building structure.
<br />1. Frame both sides of control joints independently and do not bridge joints with furring and lathing or accessories.
<br />D. Install additional framing, furring, runners, lath, and beads, as required to form openings and frames for other work as indicated.
<br />Coordinate support system for proper support of framed work that is not indicated to be supported independently of metal furring
<br />and lathing system.
<br />3.2 NON -LOAD -BEARING FRAMING INSTALLATION
<br />A. Ceiling Suspension Systems:
<br />1. Preparation and Coordination: Coordinate installation of ceiling suspension system with installation of overhead struc-
<br />tural systems to ensue inserts and other structural anchorage provisions have been installed to receive ceiling hangers in a
<br />manner that will develop their full strength and at spacings required to support ceiling.
<br />2. Hanger Installation: Comply with ML/SFA 920, "Guide Specifications for Metal Lathing and Furring," and with referenced
<br />standards.
<br />a. Do not attach hangers to metal deck tabs.
<br />3. Install ceiling suspension system components of sizes and spacings indicated, but not in smaller sizes or greater spacings
<br />than those required by referenced lathing and furring installation standards.
<br />B. Partition Framing and Furring: Comply with ASTM C 754 and ML/SFA 920, "Guide Specifications for Metal Lathing and Fur-
<br />ring."
<br />1. Steel Stud Systems to Receive Metal Lath:
<br />a. Extend and attach partition support systems to structure above suspended ceilings, unless otherwise indicated.
<br />b. Extend partition support systems to finish ceilings and attach to ceiling suspension members, unless otherwise indi-
<br />cated.
<br />3.3 LATHING
<br />A. Install where plaster base coats are required. Provide appropriate type, configuration, and weight of metal lath selected from mate-
<br />rials indicated that comply with referenced ML/SFA specifications and ASTM lathing installation standards.
<br />1. Suspended and Furred Ceilings: Use flat, diamond -mesh lath.
<br />2. Vertical Metal Framing and Furring: Use flat, diamond -mesh lath and cold -rolled channel stud framing.
<br />3. Exterior Sheathed Wall Surfaces: Use paper -faced, self -furring, diamond -mesh lath
<br />4. Monolithic Surfaces: Use [self -furring, diamond -mesh lath or vertical metal framing and furring as required for plaster
<br />thickness.
<br />3.4 PREPARATIONS FOR PLASTERING
<br />A. Protect contiguous Work from damage and deterioration caused by plastering with temporary covering and other provisions neces-
<br />sary.
<br />B. Clean plaster bases and substrates for direct application of plaster, removing loose material and substances that may impair the
<br />Work.
<br />C. Etch concrete and concrete unit masonry surfaces indicated for direct plaster application. Scrub with acid -etching solution on
<br />previously wetted surface and rinse thoroughly with clean water. Repeat application, if necessary, to obtain adequate suction and
<br />mechanical bond of plaster (where dash coat, bonding agent, or additive is not used).
<br />D. Apply bonding agent on concrete and concrete unit masonry surfaces indicated for direct plaster application.
<br />E. Apply dash coat on concrete surfaces indicated for direct plaster application. Moist -cure dash coat for at least 24 hours after appli-
<br />cation and before plastering.
<br />F. Install temporary grounds and screeds to ensure accurate rodding of plaster to true surfaces; coordinate with scratch -coat work.
<br />G. Refer to Division 6 Sections for installing permanent wood grounds.
<br />H. Refer to Division 7 Sections for installing flashing.
<br />L Surface Conditioning: Immediately before plastering, dampen concrete and concrete unit masonry substrates, except where a
<br />bonding agent has been applied, to produce optimum suction for plastering.
<br />3.5 PLASTERING ACCESSORIES INSTALLATION
<br />A. General: Comply with referenced lathing and furring installation standards for provision and location of plaster accessories. Miter
<br />or cope accessories at corners; install with tight joints and in alignment. Attach accessories securely to plaster bases to hold acces-
<br />sories in place and in alignment during plastering.
<br />1. External Corners: Install corner reinforcement at external corners.
<br />2. Terminations of Plaster: Install casing beads, unless otherwise indicated.
<br />3. Control Joints: Install at locations indicated or, if not indicated, at locations complying with the following criteria and
<br />approved by Architect:
<br />a. Where an expansion or contraction joint occurs in surface of construction directly behind plaster membrane.
<br />b. Distance between Control Joints: Not to exceed 18 feet in either direction or a length -to -width ratio of 2-1/2 to 1.
<br />C. Wall Areas: Not more than 144 sq. ft.
<br />d. Horizontal Surfaces: Not more than 100 sq. ft. in area.
<br />e. Where plaster panel sizes or dimensions change, extend joints full width or height of plaster membrane.
<br />B. Where sound -rated plaster work is indicated by STC ratings or other notation, seal work at perimeters, control joints, openings, and
<br />penetrations with a continuous bead of acoustical sealant. Comply with ASTM C 919 and plaster manufacturer's written instruc-
<br />tions for location of sealant beads.
<br />C. Install sound attenuation blankets within stud cavities where indicated.
<br />3.6 PLASTER APPLICATION
<br />A. Plaster Application Standard: Comply with ASTM C 926.
<br />1. Mixing: Mechanically mix Cementitious and aggregate materials for plasters to comply with applicable referenced applica-
<br />tion standard and with recommendations of plaster manufacturer.
<br />2. Do not use materials that are frozen, caked, lumpy, dirty, or contaminated by foreign materials.
<br />3. Do not use excessive water in mixing and applying plaster materials.
<br />B. Flat Surface Tolerances: Do not deviate more than plus or minus 1/8 inch in 10 feet from a true plane in finished plaster surfaces,
<br />as measured by a 10-foot straightedge placed at any location on surface.
<br />C. Grout hollow -metal frames, bases, and similar work occurring in plastered areas, with base -coat plaster material, and before lath-
<br />ing where necessary. Except where full grouting is indicated or required for fire -resistance rating, grout at least 6 inches at each
<br />jamb anchor.
<br />D. Sequence plaster application with installation and protection of other work so that neither will be damaged by installation of
<br />other.
<br />E. Plaster flush with metal frames and other built-in metal items or accessories that act as a plaster ground, unless otherwise indicated.
<br />Where interior plaster is not terminated at metal frame by casing beads, cut base coat free from metal frame before plaster sets and
<br />groove finish coat at junctures with metal.
<br />F. Corners: Make internal corners and angles square; finish external corners flush with cornerbeads on interior work, square and true
<br />with plaster faces on exterior work.
<br />G. Number of Coats:
<br />1. Metal Lath: Three coats.
<br />2. Concrete Unit Masonry: Two coats.
<br />3. Concrete, Cast -in -Place or Precast: Two coats when surface condition complies with ASTM C 926 for plaster bonded to
<br />solid base.
<br />H. Finish Coats:
<br />1. Float Finish: Apply ii nosh coat to a minimum thickness of 1/8 inch to completely cover base coat, uniformly floated to a true
<br />even plane with fine -textured finish matching sample.
<br />2. Trowel -Textured Finish: Apply finish coat with hand -troweled -textured finish matching sample.
<br />3. Moist -cure plaster base and finish coats to comply with ASTM C 926, including written instructions for time between coats
<br />and curing in "Annex A2 Design Considerations."
<br />3.7 CUTTING, PATCHING, AND CLEANING
<br />A. Cut, patch, replace, repair, and point up plaster as necessary to accommodate other work. Repair cracks and indented surfaces.
<br />Point -up finish plaster surfaces around items that are built into or penetrate plaster surfaces. Repair or replace work to eliminate
<br />blisters, buckles, check cracking, dry outs, efflorescence, excessive pinholes, and similar defects. Repair or replace work as neces-
<br />sary to comply with required visual effects.
<br />B. Remove temporary covering and other provisions made to minimize spattering of plaster on other work. Promptly remove plaster
<br />from door- frames, windows, and other surfaces not to be plastered. Repair surfaces stained, marred or otherwise damaged during
<br />plastering work.
<br />END OF SECTION 09220
<br />SECTION 09260 - GYPSUM BOARD ASSEMBLIES
<br />PART 1 - GENERAL
<br />I.1 SUMMARY
<br />A. This Section includes the following:
<br />1. Interior gypsum wallboard.
<br />2. Exterior gypsum board panels for ceilings and soffits.
<br />3. Non -load -bearing steel framing.
<br />1.2 SUBMITTALS
<br />A. Product Data: For each product indicated.
<br />B. Samples: For each textured finish indicated and on same backing indicated for Work upon request of Architect.
<br />1.3 QUALITY ASSURANCE
<br />A. Fire -Test -Response Characteristics: For gypsum board assemblies with fire -resistance ratings, provide materials and construction
<br />identical to those tested in assembly indicated according to ASTM E 119 by an independent testing and inspecting agency accept-
<br />able to authorities having jurisdiction.
<br />B. Sound Transmission Characteristics: For gypsum board assemblies with STC ratings, provide materials and construction identical
<br />to those tested in assembly indicated according to ASTM E 90 and classified according to ASTM E 413 by a qualified independent
<br />testing agency.
<br />PART 2 - PRODUCTS
<br />2.1 MANUFACTURERS
<br />A. In other Part 2 articles where subparagraph titles below introduce lists, the following requirements apply for product selection:
<br />1. Available Products: Subject to compliance with requirements, products that may be incorporated into the Work include, but
<br />are not limited to, the products specified.
<br />2.2 STEEL FRAMING
<br />A. Steel Framing, General: Comply with ASTM C 754 for conditions indicated.
<br />1. Steel Sheet Components: Metal complying with ASTM C 645 requirements.
<br />a. Protective Coating:
<br />1) Interior Applications: ASTM A 653/A 653M, G40, hot -dip galvanized.
<br />2) Exterior Applications: ASTM A 653/A 653M, G60, hot -dip galvanized zinc coating.
<br />B. Suspended Ceiling and Soffit Framing:
<br />1. Tie Wire: ASTM A 641/A 641M, Class I zinc coating, soft temper, 0.0625-inch- diameter wire, or double strand of 0.0475-
<br />inch-diameter wire.
<br />2. Hanger Attachments to Concrete:
<br />a. Powder -Actuated Fasteners: Suitable for application indicated, fabricated from corrosion -resistant materials, with
<br />clips or other devices for attaching hangers of type indicated, and capable of sustaining, without failure, a load equal
<br />to 10 times that imposed by construction as determined by testing according to ASTM E 1190 by a qualified indepen-
<br />dent testing agency.
<br />3. Wire Hangers: ASTM A 641/A 641M, Class 1 zinc coating, soft temper, 0.162-inch diameter.
<br />4. Carrying Channels: Cold -rolled, commercial -steel sheet with a base metal thickness of 0.0538 inch, a minimum 1/2-inch-
<br />wide flange, and in depth indicated.
<br />5. Furring Channels (Furring Members):
<br />a. Steel Studs: ASTM C 645, in depth indicated.
<br />b. "Z" Shaped, Rigid Furring Channels: ASTM C 645, 1 1/2 inch deep.
<br />C. Grid Suspension System for Interior Ceilings: ASTM C 645, direct -hung system composed of main beams and cross -furring
<br />members that interlock.
<br />1. Products:
<br />a. Armstrong World Industries, Inc.; Furring Systems/Drywall.
<br />b. Chicago Metallic Corporation; Fire Front 630 System.
<br />C. USG Interiors, Inc.; Drywall Suspension System.
<br />D. Partition and Soffit Framing:
<br />1. Steel Studs and Runners: ASTM C 645, in depth indicated.
<br />2. Deep -Leg Deflection Track: ASTM C 645 top runner with 2-inch-deep flanges.
<br />3. Flat Strap and Backing Plate: Steel sheet for blocking and bracing in length and width indicated.
<br />a. Minimum Base Metal Thickness: 0.0179 inch or as indicated.
<br />4. Cold -Rolled Channel Bridging: 0.0538-inch bare steel thickness, with minimum 1/2-inch-wide flange, and in depth indi-
<br />cated.
<br />a. Clip Angle: 1-1/2 by I- 1/2 inch, 0.068-inch-thick, galvanized steel.
<br />5. Hat -Shaped, Rigid Furring Channels: ASTM C 645, in depth indicated.
<br />a. Minimum Base Metal Thickness: 0.0179 inch.
<br />b. Tie Wire: ASTM A 641/A 641 M, Class 1 zinc coating, soft temper, 0.0625-inch- (1.59-mm-) diameter wire, or double
<br />strand of 0. 0475 - inch- diameter wire.
<br />6. Fasteners for Metal Framing: Of type, material, size, corrosion resistance, holding power, and other properties required to
<br />fasten steel members to substrates.
<br />2.3 PANEL PRODUCTS
<br />A. Panel Size, General: Provide in maximum lengths and widths available that will minimize joints in each area and correspond with
<br />support system indicated.
<br />B. Gypsum Wallboard: ASTM C 36.
<br />1. Regular Type: In thickness indicated and with long edges tapered.
<br />2. Type X: In thickness indicated and with long edges tapered.
<br />C. Flexible Gypsum Wallboard: ASTM C 36, manufactured to bend to fit tight radii and to be more flexible than standard regular -
<br />type panels of the same thickness, 1/4 inch thick, and with long edges tapered. Apply in double layer at curved assemblies.
<br />D. Sag -Resistant Gypsum Wallboard: ASTM C 36, manufactured to have more sag resistance than regular -type gypsum board, 1/2
<br />inch (12.7 min) thick, and with long edges tapered. Apply on ceiling surfaces.
<br />E. Exterior Gypsum Panels for Ceilings and Soffits:
<br />1. Glass -Mat Gypsum Sheathing Board: ASTM C 1177/C 1177M, with core type and in thickness indicated.
<br />a. Product: G-P Gypsum Corp; Dens -Glass Gold.
<br />2.4 TRIM ACCESSORIES
<br />A. Interior Trim: ASTM C 1047.
<br />1. Cornerbead: Use at outside corners.
<br />2. Bullnose Bead: Use at outside corners .
<br />3. LC -Bead: Use at exposed panel edges.
<br />B. Exterior Trim: ASTM C 1047, hot -dip galvanized steel sheet or rolled zinc.
<br />1. Cornerbead: Use at outside corners.
<br />2. LC -Bead: Use at exposed panel edges.
<br />3. Expansion (Control) Joint: One-piece, rolled zinc with V-shaped slot and removable strip covering slot opening.
<br />C. Aluminum Trim: Extruded accessories of profiles and dimensions indicated.
<br />1. Products:
<br />a. Fry Reglet Corp.; As indicated by designation on Drawings.
<br />b. Gordon, Inc..
<br />C. MM Systems Corporation; As indicated by designation on Drawings.
<br />d. Pittcon Industries; As indicated by designation on Drawings.
<br />2. Aluminum: Alloy and temper with not less than the strength and durability properties of ASTM B 221, alloy 6063-T5
<br />3. Finish: Corrosion -resistant primer compatible with joint compound and finish materials specified.
<br />2.5 JOINT TREATMENT MATERIALS
<br />A. General: Comply with ASTM C 475.
<br />B. Joint Tape:
<br />1. Interior Gypsum Wallboard: Paper.
<br />2. Exterior Gypsum Soffit Board: Paper.
<br />3. Glass -Mat Gypsum Sheathing Board: 10-by-10 glass mesh.
<br />C. Joint Compound for Interior Gypsum Wallboard: For each coat use formulation that is compatible with other compounds applied
<br />on previous or for successive coats.
<br />1. Prefilling: At open joints and damaged surface areas, use setting -type taping compound.
<br />2. Embedding and First Coat: For embedding tape and first coat on joints, flanges of trim accessories, and fasteners, use set-
<br />ting -type taping compound.
<br />3. Fill Coat: For second coat, use setting -type, sandable topping compound.
<br />4. Finish Coat: For third coat, use setting -type, sandable topping compound.
<br />5. Skim Coat: For final coat of Level 5 finish, use setting -type, sandable topping compound.
<br />D. Joint Compound for Exterior Applications:
<br />I . Exterior Gypsum Soffit Board: Use setting -type taping and setting -type, sandable topping compounds.
<br />2. Glass -Mat Gypsum Sheathing Board: As recommended by manufacturer.
<br />E. Joint Compound for Tile Backing Panels:
<br />1. Water -Resistant Gypsum Backing Board: Use setting -type taping and setting -type, sandable topping compounds.
<br />2. Glass -Mat, Water -Resistant Backing Panel: As recommended by manufacturer.
<br />3. Cementitious Backer Units: As recommended by manufacturer.
<br />2.6 AUXILIARY MATERIALS
<br />A. General: Provide auxiliary materials that comply with referenced installation standards and manufacturer's written recommenda-
<br />tions.
<br />1. Use screws complying with ASTM C 954 for fastening panels to steel members from 0.033 to 0.112 inch (0.84 to 2.84 min)
<br />thick.
<br />2. For fastening Cementitious backer units, use screws of type and size recommended by panel manufacturer.
<br />PART 3 - EXECUTION
<br />3.1 NON -LOAD -BEARING STEEL FRAMING INSTALLATION
<br />A. General: Comply with ASTM C 754, and ASTM C 840 requirements that apply to framing installation.
<br />B. Suspended Ceiling and Soffit Framing:
<br />1. Suspend ceiling hangers plumb and free from contact with insulation or other objects within ceiling plenum that are not part
<br />of supporting structural or ceiling suspension system. Splay hangers only where required to miss obstructions and offset
<br />resulting horizontal forces by bracing, con: tersplaying, or other equally effective means.
<br />2. Where width of ducts and other construction within ceiling plenum produces hanger spacings that interfere with the location
<br />of hangers required to support standard suspension system members, install supplemental suspension members and hang-
<br />ers in form f trapezes r i e . o o t a e es o equivalent valent devices.. Size supplemental suspension members and hangers to support ceiling loads
<br />P q PP P g PP g
<br />within performance limits established by referenced standards.
<br />3. Attach hangers to structural members. Do not support ceilings from or attach hangers to permanent metal forms, steel deck
<br />tabs, steel roof decks, ducts, pipes, or conduit.
<br />4. Screw furring to wood framing.
<br />5. Wire -tie furring channels to supports, as re
<br />quired to comply with requirements for assemblies indicated.
<br />6. Grid Suspension System: Attach perimeter wall track or angle where grid suspension system meets vertical surfaces.
<br />Mechanically join main beam and cross -furring members to each other and butt -cut to fit into wall track.
<br />C. Partition and Soffit Framing:
<br />1. Where studs are installed directly against exterior walls, install isolation strip between studs and wall.
<br />2. Extend partition framing full height to structural supports or substrates above suspended ceilings, except where partitions
<br />are indicated to terminate at suspended ceilings. Continue framing over frames for doors and openings and frame around
<br />ducts penetrating partitions above ceiling to provide support for gypsum board.
<br />3. Frame door openings to comply with GA-600 and with gypsum board manufacturer's applicable written recommendations,
<br />unless otherwise indicated. Screw vertical studs at jambs to jamb anchor clips on door frames; install runner track section
<br />(for cripple studs) at head and secure to jamb studs.
<br />a. Install two studs at each jamb, unless otherwise indicated.
<br />b. Extend jamb studs through suspended ceilings and attach to underside of floor or roof structure above.
<br />4. Frame openings other than door openings the same as required for door openings, unless otherwise indicated. Install fram-
<br />ing below sills of openings to match framing required above door heads.
<br />3.2 PANEL PRODUCT INSTALLATION
<br />A. Gypsum Board: Comply with ASTM C 840 and GA-216.
<br />1. Space screws a maximum of 12 inches o.c. for vertical applications.
<br />2. On ceilings, apply gypsum panels before wall/partition board application to the greatest extent possible and at right angles
<br />to framing, unless otherwise indicated.
<br />3. On partitions/walls, apply gypsum panels vertically (parallel to framing), unless otherwise indicated or required by fire -
<br />resistance -rated assembly, and minimize end joints.
<br />a. Stagger abutting end joints not less than one framing member in alternate courses of board.
<br />b. At stairwells and other high walls, install panels horizontally, unless otherwise indicated or required by fire -resis-
<br />tance -rated assembly.
<br />4. Single -Layer Fastening Methods: Apply gypsum panels to supports with steel drill screws.
<br />5. Laminating to Substrate: Comply with gypsum board manufacturer's written recommendations and temporarily brace or
<br />fasten gypsum panels until fastening adhesive has set.
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