PB 20-1 Addendum 1.pdf

PB 20-1 Public Address System Replacement

BOARD OF COUNTY COMMISSIONERS

PALM BEACH COUNTY, FLORIDA

PALM BEACH COUNTY DEPARTMENT OF AIRPORTS

PROJECT NAME: Palm Beach International Airport Public Address System Replacement

PROJECT NUMBER: Department of Airports Project No. PB 20-1

ADDENDUM NUMBER 1

Date of Issue: February 10, 2020

This addendum modifies or interprets the proposal documents by additions, deletions, clarifications, corrections, or other type of modifications. Addenda will become part of the Contract Documents.

Proposers, upon receiving addenda, shall insert same into the Proposal Documents.

It is required that this Addendum Number 1 be signed in the Acknowledgement of Receipt below, and attached to the Proposal and become part of the Proposal.

Acknowledgement of Receipt of Bidder

ADDENDUM NO. 1

February 10, 2020

This addendum includes the following:

1. Project Manual

1.1. Table of Contents page 3 of 6; ADD the following to the

Technical Specifications: 01731 Cutting and Patching;

01732 Selective Demolition; 09220 Portland Cement and Plaster; 09260 Gypsum Board Assemblies; 09512 Acoustical Tile Ceilings; and 09912 Painting.

2. Technical Specifications

2.1 Section 01731 Cutting and Patching

Add Section 01731 Cutting and Patching (2 pages).

2.2 Section 01732 Selective Demolition

Add Section 01732 Selective Demolition (4 pages).

2.3 Section 09220 Portland Cement and Plaster

Add Section 09220 Portland Cement and Plaster (8 pages).

2.4 Section 09260 Gypsum Board Assemblies

Add Section 09260 Gypsum Board Assemblies (19 pages).

2.5 Section 09512 Acoustical Tile Ceilings

Add Section 09512 Acoustical Tile Ceilings (5 pages).

2.6 Section 09912 Painting

Add Section 09912 Painting (8 pages).

3. Drawings

3.1. Drawing Index Sheet TI-001;

Add Sheet A-001 to the Drawing Index after Sheet TI-706 and before Sheet E-001

3.2. Demolition PA System Legend & Notes Sheet, TDI-002;

General Demolition Note 3, Add “REFER TO ARCHITECTURAL

SPECIFICATIONS AND SHEET A-001 FOR FURTHER DETAILS.”

3.3. Public Address System Legend and Notes, Sheet TI-002;

General Note 3, Add “REFER TO ARCHITECTURAL

SPECIFICATIONS AND SHEET A-001 FOR FURTHER DETAILS ON

PATCHING, PAINTING, AND REPLACEMENT OF CEILING TILES.”

3.4. Sheet A-001, Typical Repair Details, Added

New Drawing to include typical repair details.

4. Clarifications and Contractor’s Questions

Note: The deadline for questions is February 20, 2020, seven (7) calendar days prior to the date for receipt of bids.

5.This Addendum includes the following attachments:

Section 01731 Cutting and Patching, Pages 01731-1 through 01731-2, Addendum No. 1, dated February 10, 2020.

Section 01732 Selective Demolition, Pages 01732-1 through 01732-4, Addendum No. 1, dated February 10, 2020.

Section 09220 Portland Cement and Plaster, Pages 09220-1 through 09220-8, Addendum No. 1, dated February 10, 2020.

Section 09260 Gypsum Board Assemblies, Pages 09260-1 through 09220-19, Addendum No. 1, dated February 10, 2020.

Section 09512 Acoustical Tile Ceilings, Pages 09512-1 through 09512-5, Addendum No. 1, dated February 10, 2020.

Section 09912 Painting, Pages 09912-1 through 09912-8, Addendum No. 1, dated February 10, 2020.

Sheet A-001, Typical Repair Details, Revision 1, dated February 10, 2020.

END OF ADDENDUM 1

Palm Beach International Airport CUTTING AND PATCHING Public Address System Replacement 01731 - 1 Addendum No. 1 February 10, 2020

SECTION 01731

CUTTING AND PATCHING

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes procedural requirements for cutting and patching.

B. See Divisions 2 through 27 Sections for specific requirements and limitations applicable to cutting and patching individual parts of the Work.

1.2 SUBMITTALS

A. Cutting and Patching Proposal: Submit a proposal describing procedures at least 10 days before the time cutting and patching will be performed, requesting approval to proceed. Include the following information:

1. Extent: Describe cutting and patching, show how they will be performed, and indicate why they cannot be avoided.

2. Changes to Existing Construction: Describe anticipated results. Include changes to site elements.

3. Products: List products to be used and firms or entities that will perform the Work.

4. Dates: Indicate when cutting and patching will be performed.

5. Utilities: List utilities that cutting and patching procedures will disturb or affect.

List utilities that will be relocated and those that will be temporarily out of service.

Indicate how long service will be disrupted.

6. Architect's Approval: Obtain approval of cutting and patching proposal before cutting and patching. Approval does not waive right to later require removal and replacement of unsatisfactory work.

1.3 QUALITY ASSURANCE

A. Operational Elements: Do not cut and patch operating elements and related components in a manner that results in reducing their capacity to perform as intended or that results in increased maintenance or decreased operational life or safety.

1. Sewer System

2. Water System

1.4 WARRANTY

A. Existing Warranties: Remove, replace, patch, and repair materials and surfaces cut or damaged during cutting and patching operations, by methods and with materials so as not to void existing warranties.

PART 2 - PRODUCTS

2.1 MATERIALS

Palm Beach International Airport CUTTING AND PATCHING Public Address System Replacement 01731 - 2 Addendum No. 1 February 10, 2020

A. General: Comply with requirements specified in other Sections of these Specifications.

B. Existing Materials: Use materials identical to existing materials. For exposed surfaces, use materials that visually match existing adjacent surfaces to the fullest extent possible.

1. If identical materials are unavailable or cannot be used, use materials that, when installed, will match the visual and functional performance of existing materials.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine surfaces to be cut and patched and conditions under which cutting and patching are to be performed.

1. Compatibility: Before patching, verify compatibility with and suitability of substrates, including compatibility with existing finishes or primers.

2. Proceed with installation only after unsafe or unsatisfactory conditions have been corrected.

3.2 PREPARATION

A. Adjoining Areas: Avoid interference with use of adjoining areas or interruption of free passage to adjoining areas.

B. Existing Services: Where existing services are required to be removed, relocated, or abandoned, bypass such services before cutting to avoid interruption of services to occupied areas.

3.3 PERFORMANCE

A. General: Employ skilled workers to perform cutting and patching. Proceed with cutting and patching at the earliest feasible time, and complete without delay.

1. Cut existing construction to provide for installation of other components or performance of other construction, and subsequently patch as required to restore surfaces to their original condition.

B. Cutting: Cut existing construction by sawing, drilling, breaking, chipping, grinding, and similar operations, including excavation, using methods least likely to damage elements retained or adjoining construction. If possible, review proposed procedures with original Installer; comply with original Installer's written recommendations.

1. Excavating and Backfilling: Comply with requirements in applicable Division 2 Sections where required by cutting and patching operations.

- END OF SECTION -

Palm Beach International Airport SELECTIVE DEMOLITION Public Address System Replacement 01732 - 1 Addendum No. 1 February 10, 2020

SECTION 01732

SELECTIVE DEMOLITION

A. This Section includes demolition and removal of the following:

1. Repair procedures for selective demolition operations.

B. See Section 26 Sections for demolishing, cutting, patching, or relocating electrical items.

1.2 DEFINITIONS

A. Remove: Detach items from existing construction and legally dispose of them off-site, unless indicated to be removed and salvaged or removed and reinstalled.

B. Existing to Remain: Existing items of construction that are not to be removed and that are not otherwise indicated to be removed, removed and salvaged, or removed and reinstalled.

1.3 SUBMITTALS

A. Proposed Control Measures: Submit statement or drawing that indicates the measures proposed for use, proposed locations, and proposed time frame for their operation. Identify options if proposed measures are later determined to be inadequate. Include measures of the following:

1. Dust control.

2. Noise Control.

B. Schedule of Selective Demolition Activities: Indicate detailed sequence of selective demolition and removal work, with starting and ending dates for each activity, interruption of utility services and locations of temporary partitions and means of egress.

C. Predemolition Photographs or Videotape: Show existing conditions of adjoining construction and site improvements that might be misconstrued as damage caused by selective demolition operations. Submit before Work begins.

D. Landfill Records: Indicate receipt and acceptance of hazardous wastes by a landfill facility licensed to accept hazardous wastes.

1.5 QUALITY ASSURANCE

Public Address System Replacement 01732 - 2 Addendum No. 1 February 10, 2020

A. Demolition Firm Qualifications: An experienced firm that has specialized in demolition work similar in material and extent to that indicated for this Project.

B. Regulatory Requirements: Comply with governing EPA notification regulations before beginning selective demolition. Comply with hauling and disposal regulations of authorities having jurisdiction.

C. Standards: Comply with ANSI A10.6 and NFPA 241.

D. Predemolition Conference: Conduct conference at project site.

1.6 PROJECT CONDITIONS

A. Maintain access to existing walkways, drives, and other adjacent occupied or used facilities.

1. Do not close or obstruct walkways, drives, or other occupied or used facilities without written permission from authorities having jurisdiction.

B. Owner assumes no responsibility for condition of areas to be selectively demolished.

1. Conditions existing at time of inspection for bidding purpose will be maintained by Owner as far as practical.

C. Hazardous Materials: It is not expected that hazardous materials will be encountered in the work.

1. If materials suspected of containing hazardous materials are encountered, do not disturb, immediately notify Architect and Owner. Hazardous materials will be removed by Owner under separate contract.

D. Utility Service: Maintain existing utilities indicated to remain in service and protect them against damage during selective demolition operations.

1. Maintain fire-protection facilities in service during selective operations.

1.7 WARRANTY

A. Existing Warranties: Remove, replace, patch, and repair materials and surfaces cut or damaged during selective demolition, by methods and with materials so as not to void existing warranties.

2.1 REPAIR MATERIALS

A. Use repair materials identical to existing materials.

Public Address System Replacement 01732 - 3 Addendum No. 1 February 10, 2020

1. If identical materials are unavailable or cannot be used for exposed surfaces, use materials that visually match existing adjacent surfaces to the fullest extent possible.

2. Use materials whose installed performance equals or surpasses that of existing materials.

A. Verify that utilities have been disconnected and capped.

B. Survey existing conditions and correlate with requirements indicated to determine extent of selective demolition required.

C. Inventory and record the condition of items to be removed and reinstalled and items to be removed and salvaged.

D. When unanticipated mechanical, electrical or structural elements that conflict with intended function or design are encountered, investigate and measure the nature and extent of conflict. Promptly submit a written report to Architect.

3.2 UTILITY SERVICES

A. Existing Utilities: Maintain services indicated to remain and protect them against damage during selective demolition operations.

B. Do not interrupt existing utilities serving occupied or operating facilities unless authorized in writing by Owner and authorities having jurisdiction. Provide temporary services during interruptions to existing utilities, as acceptable to Owner and to authorities having jurisdiction.

1. Provide at least seventy-two (72) hours' notice to Owner if shutdown of service is required during changeover.

C. Utility Requirements: Locate, identify, disconnect, and seal or cap off indicated utilities serving areas to be selectively demolished.

1. Arrange to shut off indicated utilities with utility companies.

2. If utility services are required to be removed, relocated, or abandoned, provide temporary utilities before proceeding with selective demolition that bypass area of selective demolition and that maintain continuity of service to other parts of site and adjacent buildings.

3.3 PREPARATION

A. Site Access and Temporary Controls: Conduct selective demolition and debris-removal operations to ensure minimum interference with roads, streets, walks, walkways, and other adjacent occupied and used facilities.

Public Address System Replacement 01732 - 4 Addendum No. 1

1. Do not close or obstruct streets, walks, walkways, or other adjacent occupied or used facilities without permission from Owner and authorities having jurisdiction. Provide alternate routes around closed or obstructed traffic ways if required by governing regulations.

2. Protect existing site improvements, appurtenances, and landscaping to remain.

B. Temporary Facilities: Provide temporary barricades and other protection required to prevent injury to people and damage to adjacent buildings and facilities to remain.

3.4 PATCHING AND REPAIRS

A. General: Promptly repair damage to adjacent construction caused by selective demolition operations.

B. Patching: Comply with Division 1 Section "Cutting and Patching."

C. Repairs: Where repairs to existing surfaces are required, patch to produce surfaces suitable for new materials.

D. Finishes: Restore exposed finishes of patched areas and extend restoration into adjoining construction in a manner that eliminates evidence of patching and refinishing.

3.5 DISPOSAL OF DEMOLISHED MATERIALS

A. General: Promptly dispose of demolished materials. Do not allow demolished materials to accumulate on-site.

B. Disposal: Transport demolished materials off Owner's property and legally dispose of them.

Palm Beach International Airport PORTLAND CEMENT AND PLASTER Public Address System Replacement 09220 - 1 Addendum No. 1 February 10, 2020

SECTION 09220

PORTLAND CEMENT AND PLASTER

A. This Section includes the following:

1. Portland Cement Plaster Finishes: Stucco.

2. Non-load-bearing metal framing and furring.

3. Metal lath and plastic accessories.

B. See Division 5 Section "Cold-Formed Metal Framing" for load-bearing steel framing.

1.2 SUBMITTALS

A. Product Data: For each product indicated.

B. Samples: For each exposed finish and for each color and texture required.

C. Material Certificates: Submit certificates signed by manufacturer for each kind of plaster aggregate certifying that materials comply with requirements.

1.3 QUALITY ASSURANCE

A. Fire-Test-Response Characteristics: Where indicated, provide assemblies identical to those tested for fire resistance per ASTM E 119 by a testing and inspecting agency acceptable to authorities having jurisdiction.

B. Mockups: Install mockups to verify selections made under sample Submittals and to demonstrate aesthetic effects and qualities of materials and execution.

1. Install mockups as shown on Drawings 48" x 48".

2. Approved mockups may become part of the completed Work if undisturbed at time of Substantial Completion.

C. Preinstallation Conference: Conduct conference at project site prior to commencing work.

1.4 PROJECT CONDITIONS

A. Environmental Requirements, General: Comply with requirements of referenced plaster application standards and recommendations of plaster manufacturer for environmental conditions before, during, and after plaster application.

2.1 NON-LOAD-BEARING STEEL FRAMING

Public Address System Replacement 09220 - 2 Addendum No. 1

A. Steel Sheet Components, General: Metal complying with ASTM C 645 requirements.

1. Protective Coating, Exterior Applications: ASTM A 653/A 653M, G60, hot-dip galvanized zinc coating.

B. Suspended Ceiling and Soffit Framing: Size metal ceiling supports to comply with

ASTM C 1063, unless otherwise indicated.

1. Hanger Attachments to Concrete: Anchors fabricated from corrosion-resistant materials with holes or loops for attaching hanger wires and capable of sustaining, without failure, a load equal to five (5) times that imposed by construction as determined by testing according to ASTM E 488 by a qualified independent testing agency. Type: Cast-in-place anchor, designed for attachment to concrete forms.

2. Wire for Hangers and Ties: ASTM A 641/A 641M, Class 1 zinc coating, soft temper.

3. Carrying Channels: Cold-rolled, commercial-steel sheet with a base metal thickness of 0.0538 inch, a minimum 1/2-inch wide flange, and in depth indicated.

4. Furring Channels (Furring Members):

a. Cold-Rolled Channels: 0.0538-inch bare steel thickness, with minimum 1/2-inch wide flange, 3/4 inch deep.

b. Steel Studs: ASTM C 645, in depth indicated.

1) Minimum Base Metal Thickness: As indicated.

2.2 ACCESSORIES

General: ASTM C 1063. Coordinate depth of accessories with thicknesses and number of plaster coats required.

Retain acceptable materials below.

PVC Plastic: Minimum 0.035 inch thick.

Cornerbeads: Small nose cornerbeads with expanded flanges of large-mesh diamond-metal lath allowing full plaster encasement.

Material: PVC.

Casing Beads: 1” and 1 ½” Square-edged style, with expanded flanges.

Material: PVC.

Curved Casing Beads: 1” and 1 ½” Bull nose-edged style, fabricated from aluminum coated with clear plastic, preformed into curve of radius indicated.

Angled Banding Bead: 1 ½” x ¾” Double ground horizontal band.

Material: PVC

Public Address System Replacement 09220 - 3 Addendum No. 1 February 10, 2020

Soffit Control Joints: Prefabricated with removable protective tape on plaster face of control joints.

Material: PVC.

Wall Control Joints: Hand Tooled control joints.

Lath Attachment Devices: Material and type required by ASTM C 1063 for installations indicated.

2.3 LATH

A. Expanded-Metal Lath: ASTM C 847.

1. Material: Zinc-coated (galvanized) steel sheet, structural quality, with coating complying with ASTM A 653/A 653M, G60 coating designation.

2. Diamond-Mesh Lath: Self-furring.

a. Weight: 3.4 lb/sq. yd.

3. Rib Lath:

a. Flat, rib depth of not more than 1/8 inch.

1) Weight: 3.4 lb/sq. yd.

b. Backing: Where lath is indicated to have backing, and where backing is required for machine application of plaster; provide self-furring lath backed with asphalt felts on solid gypsum sheathing.

2.4 PLASTER MATERIALS

A. Base-Coat Cements: Portland cement, ASTM C 150, Type I

B. Job-Mixed Finish-Coat Cement: Portland cement, ASTM C 150, Type I.

1. Cement Color: Gray.

C Lime: Special non air-entraining hydrated lime for finishing purposes, ASTM C 206, Type S; or special non air-entraining hydrated lime for masonry purposes, ASTM C 207, Type S.

D. Sand Aggregate for Base Coats: ASTM C 897.

E. Aggregate for Finish Coats: ASTM C 897 system, and as indicated below.

1. Manufactured or natural sand, white in color.

2.5 MISCELLANEOUS MATERIALS

Public Address System Replacement 09220 - 4 Addendum No. 1 February 10, 2020

A. Fiber for Base Coat in Three-Coat Work: Alkaline-resistant glass or polypropylene fibers, 1/2 inch long, free of contaminates, manufactured for use in Portland cement plaster.

B. Water for Mixing and Finishing Plaster: Potable.

C. Bonding Agent: A non-re-emulsifiable acrylic emulsion. Approved products include

Thoroseal/Acryl 60, manufactured by Harris Specialty Chemicals, Inc.: Xycrylic, manufactured by Xypec Chemical Corp.: and Sikalatex, manufactured by Sika Chemical Corp.

D. Acid-Etching Solution: Muriatic acid (10 percent solution of commercial hydrochloric acid) mixed 1 part to not less than 6 nor more than 10 parts water.

E. Asphalt-Saturated Felt: ASTM D 226, Type I (No. 15), nonperforated.

2.6 PLASTER MIXES AND COMPOSITIONS

A. General: Comply with ASTM C 926 for base – and finish-coat mixes as applicable to plaster bases, materials, and other requirements indicated, except that plastic cement and masonry cement not permitted.

1. Base-Coat Mixes and Compositions: Proportion materials for respective base coats in parts by volume for cementitious materials and in parts by volume of aggregate per sum of cementitious materials to comply with the following requirements for each method of application and plaster base indicated. Adjust mix proportions below within limits specified to attain workability.

B. Fiber Content: Add fiber to brown coat of three-coat mixes after ingredients have mixed for at least 2 minutes. Comply with fiber manufacturer’s written instructions, but do not exceed 1 lb/cu. ft. of cementitious materials. Reduce aggregate quantities accordingly to maintain workability.

C. Three-Coat Work over Metal Lath: Base-coat proportions as indicated below:

1. Scratch Coat: 1 part portland cement, 0 to 3/4 parts lime, 2-1/2 to 4 parts sand.

2. Brown Coat: 1 part portland cement, 0 to 3/4 parts lime, 3 to 5 parts sand.

D. Two-Coat Work over Concrete Unit Masonry: Base coat proportions as indicated below:

1. Base Coat Mix: 1 part portland cement, 3/4 to 1-1/2 parts lime, 3 to 4 parts sand.

Water to be mixed with bonding admixture in proportion as recommended by admixture manufacturer.

E. Job-Mixed Finish Coats: Proportion materials for finish coats in parts by volume for cementitious materials and parts by volume of aggregates per sum of cementitious materials to comply with the following requirements:

1. Proportions using sand aggregates as indicated below:

Public Address System Replacement 09220 - 5 Addendum No. 1 February 10, 2020

a. 1 part portland cement, ¾ to 1-1/2 parts lime, 3 parts sand.

PART 3 - EXECUTION

3.1 LATH AND FURRING INSTALLATION, GENERAL

A. Standards: Comply with ML/SFA 920, "Guide Specifications for Metal Lathing and

Furring," and ASTM C 1063.

B. Install supplementary framing, blocking, and bracing at terminations in work and for support of fixtures, equipment services, heavy trim, grab bars, handrails, furnishings, and similar work to comply with details indicated or, if not otherwise indicated, to comply with applicable written instructions of lath and furring manufacturer.

C. Isolation: Where lathing and metal support system abut building structure horizontally and where partition or wall abuts overhead structure, isolate from structural movement to prevent transfer of loading from building structure.

1. Frame both sides of control joints independently and do not bridge joints with furring and lathing or accessories.

D. Install additional framing, furring, runners, lath, and beads, as required to form openings and frames for other work as indicated. Coordinate support system for proper support of framed work that is not indicated to be supported independently of metal furring and lathing system.

3.2 NON-LOAD-BEARING FRAMING INSTALLATION

A. Ceiling Suspension Systems:

1. Preparation and Coordination: Coordinate installation of ceiling suspension system with installation of overhead structural systems to ensure inserts and other structural anchorage provisions have been installed to receive ceiling hangers in a manner that will develop their full strength and at spacings required to support ceiling.

2. Hanger Installation: Comply with ML/SFA 920, "Guide Specifications for Metal Lathing and Furring," and with referenced standards.

a. Do not attach hangers to metal deck tabs.

3. Install ceiling suspension system components of sizes and spacings indicated, but not in smaller sizes or greater spacings than those required by referenced lathing and furring installation standards.

3.3 LATHING

A. Install where plaster base coats are required. Provide appropriate type, configuration, and weight of metal lath selected from materials indicated that comply with referenced ML/SFA specifications and ASTM lathing installation standards.

Public Address System Replacement 09220 - 6 Addendum No. 1 February 10, 2020

1. Suspended and Furred Ceilings: Use flat, diamond-mesh lath.

2. Ceramic-Tile Setting Beds: Use flat, diamond-mesh lath.

3.4 PREPARATIONS FOR PLASTERING

A. Protect contiguous Work from damage and deterioration caused by plastering with temporary covering and other provisions necessary.

B. Clean plaster bases and substrates for direct application of plaster, removing loose material and substances that may impair the Work.

C. Etch concrete and concrete unit masonry surfaces indicated for direct plaster application. Scrub with acid-etching solution on previously wetted surface and rinse thoroughly with clean water. Repeat application, if necessary, to obtain adequate suction and mechanical bond of plaster (where dash coat, bonding agent, or additive is not used).

D. Apply bonding agent on concrete and concrete unit masonry surfaces indicated for direct plaster application.

E. Apply dash coat on concrete surfaces indicated for direct plaster application. Moist-cure dash coat for at least 24 hours after application and before plastering.

F. Install temporary grounds and screeds to ensure accurate rodding of plaster to true surfaces; coordinate with scratch-coat work.

G. Refer to Division 6 Sections for installing permanent wood grounds.

H. Refer to Division 7 Sections for installing flashing.

I. Surface Conditioning: Immediately before plastering, dampen concrete and concrete unit masonry substrates, except where a bonding agent has been applied, to produce optimum suction for plastering.

3.5 PLASTERING ACCESSORIES INSTALLATION

A. General: Comply with referenced lathing and furring installation standards for provision and location of plaster accessories. Miter or cope accessories at corners;

install with tight joints and in alignment. Attach accessories securely to plaster bases to hold accessories in place and in alignment during plastering.

B. Terminations of Plaster: Install casing beads, unless otherwise indicated.

C. Control Joints: Install at locations indicated or, if not indicated, at locations complying with the following criteria and approved by Architect:

1. Where an expansion or contraction joint occurs in surface of construction directly behind plaster membrane.

Public Address System Replacement 09220 - 7 Addendum No. 1 February 10, 2020

2. Distance between Control Joints: Not to exceed 18 feet in either direction or a length-to-width ratio of 2-1/2 to 1.

3. Wall Areas: Not more than 144 sq. ft.

4. Horizontal Surfaces: Not more than 100 sq. ft. in area.

5. Where plaster panel sizes or dimensions change, extend joints full width or height of plaster membrane.

D. Where sound-rated plaster work is indicated by STC ratings or other notation, seal work at perimeters, control joints, openings, and penetrations with a continuous bead of acoustical sealant. Comply with ASTM C 919 and plaster manufacturer's written instructions for location of sealant beads.

E. Install sound attenuation blankets within stud cavities where indicated.

3.6 PLASTER APPLICATION

A. Plaster Application Standard: Comply with ASTM C 926.

1. Mixing: Mechanically mix cementitious and aggregate materials for plasters to comply with applicable referenced application standard and with recommendations of plaster manufacturer.

2. Do not use materials that are frozen, caked, lumpy, dirty, or contaminated by foreign materials.

3. Do not use excessive water in mixing and applying plaster materials.

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, as measured by a 10-foot straightedge placed at any location on surface.

C. Grout hollow-metal frames, bases, and similar work occurring in plastered areas, with base-coat plaster material, and before lathing where necessary. Except where full grouting is indicated or required for fire-resistance rating, grout at least 6 inches at each jamb anchor.

D. Sequence plaster application with installation and protection of other work so that neither will be damaged by installation of other.

E. Plaster flush with metal frames and other built-in metal items or accessories that act as a plaster ground, unless otherwise indicated. Where interior plaster is not terminated at metal frame by casing beads, cut base coat free from metal frame before plaster sets and groove finish coat at junctures with metal.

F. Corners: Make internal corners and angles square; finish external corners flush with corner beads on interior work, square and true with plaster faces on exterior work.

G. Number of Coats:

Public Address System Replacement 09220 - 8 Addendum No. 1

1. Metal Lath: Three coats.

2. Concrete Unit Masonry: Two coats.

3. Concrete, Cast-in-Place or Precast: Two coats when surface condition complies with ASTM C 926 for plaster bonded to solid base.

H. Finish Coats:

1. Float Finish: Apply finish coat to a minimum thickness of 1/8 inches to completely cover base coat, uniformly floated to a true even plane with fine-textured finish matching sample.

2. Trowel-Textured Finish: Apply finish coat with hand-troweled-textured finish matching sample.

3.7 CUTTING, PATCHING, AND CLEANING

A. Cut, patch, replace, repair, and point up plaster as necessary to accommodate other work. Repair cracks and indented surfaces. Point-up finish plaster surfaces around items that are built into or penetrate plaster surfaces. Repair or replace work to eliminate blisters, buckles, check cracking, dry outs, efflorescence, excessive pinholes, and similar defects. Repair or replace work as necessary to comply with required visual effects.

B. Remove temporary covering and other provisions made to minimize spattering of plaster on other work. Promptly remove plaster from doorframes, windows, and other surfaces not to be plastered. Repair surfaces stained, marred or otherwise damaged during plastering work.

Palm Beach International Airport GYPSUM BOARD ASSEMBLIES Public Address System Replacement 09260 - 1 Addendum No. 1

SECTION 09260

GYPSUM BOARD ASSEMBLIES

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section.

1.2 SUMMARY

A. This Section includes the following:

1. Interior gypsum wallboard.

2. Exterior glass-matt gypsum board panels for sheathing.

3. Tile backing panels.

4. Non-load-bearing steel framing.

5. Texture Finishes.

1.3 DEFINITIONS

A. Gypsum Board Terminology: Refer to ASTM C 11 for definitions of terms for gypsum board assemblies not defined in this Section or in other referenced standards.

1.4 SUBMITTALS

A. Product Data: For each type of product indicated.

B. Shop Drawings: Show fabrication, and installation of control and expansion joints including details of components, and attachments to other units of Work.

C. Samples: For the following products:

1. Trim Accessories: Full-size sample in 12-inch- long length for each trim accessory indicated.

2. Textured Finishes: Manufacturer's standard size for each textured finish indicated and on same backing indicated for Work.

D. VOC data:

1. Adhesives:

a. Submit manufacturer’s product data for adhesives. Indicate VOC limits of the product. Submit MSDS highlighting VOC limits.

b. Submit Green Seal Certification to GS-36 and description of the basis for certification

E. Submit environmental data in accordance with Table 1 of ASTM E2129 for products provided under work of this section.

Public Address System Replacement 09260 - 2 Addendum No. 1

1.5 QUALITY ASSURANCE

A. Fire-Test-Response Characteristics: For gypsum board assemblies with fire-resistance ratings, provide materials and construction identical to those tested in assembly indicated according to ASTM E 119 by an independent testing and inspecting agency acceptable to authorities having jurisdiction. Fire-Resistance-Rated Assemblies:

Indicated by design designations from UL's "Fire Resistance Directory”.

B. Sound Transmission Characteristics: For gypsum board assemblies with STC ratings, provide materials and construction identical to those tested in assembly indicated according to ASTM E 90 and classified according to ASTM E 413 by a qualified independent testing agency. STC-Rated Assemblies: Indicated by design designations from GA-600, "Fire Resistance Design Manual."

C. Gypsum Board Finish Mockups: Before finishing gypsum board assemblies, install mockups of at least 100 sq. ft. in surface area to demonstrate aesthetic effects and qualities of materials and execution.

1. Install mockups for the following applications: Surfaces with texture finishes.

2. Simulate finished lighting conditions for review of mockups.

3. Approved mockups may become part of the completed Work if undisturbed at time of Substantial Completion.

D. Preinstallation Conference: Conduct conference at Project site to comply with requirements in Division 1 Section "Project Management and Coordination." Review methods and procedures related to gypsum board assemblies including, but not limited to, the following:

1. Meet with Owner, Architect, Owner's insurer if applicable, testing and inspecting agency representative, gypsum board Installer, steel framing Installer, and installers whose work interfaces with or affects gypsum board including installers of doors, windows, and louvers.

2. Review and finalize construction schedule and verify availability of materials, Installer's personnel, equipment, and facilities needed to make progress and avoid delays.

3. Review methods and procedures related to gypsum board installation, including manufacturer's written instructions.

4. Examine support conditions for compliance with requirements, including alignment between and attachment to framing members.

5. Review governing regulations and requirements for insurance, certificates, and testing and inspecting if applicable.

6. Review temporary protection requirements for gypsum board assembly during and after installation.

7. Review gypsum board observation and repair procedures after gypsum board installation.

8. Document proceedings, including corrective measures and actions required, and furnish copy of record to each participant.

Public Address System Replacement 09260 - 3 Addendum No. 1

E. Article 1.5 – Add the following: Design Criteria: Install partition systems to withstand a load of 5 psf applied perpendicular to partition with a maximum deflection as follows:

1. Gypsum board walls and ceilings: Not to exceed L/240 of the span.

2. Ceramic tile walls: Not to exceed L/360 of the span.

F. VOC emissions: All Adhesives and Sealants shall be low Volatile Organic Compound (VOC) and meet the VOC limits below which were established by South Coast Air Quality Management District (SCAQMD) Rule #1168 and all sealants used as fillers must meet or exceed the requirements of the Bay Area Air Quality Management District Regulation 8, Rule 51.

1. Adhesives and sealants: -50 VOC or (Current Limit).

1.6 DELIVERY, STORAGE & HANDLING

A. Deliver materials in original packages, containers, or bundles bearing brand name and identification of manufacturer or supplier.

B. Store materials inside under cover and keep them dry and protected against damage from weather, direct sunlight, surface contamination, corrosion, construction traffic, and other causes. Stack gypsum panels flat to prevent sagging.

1.7 PROJECT CONDITIONS

A. Environmental Limitations: Comply with ASTM C 840 requirements or gypsum board manufacturer's written recommendations, whichever are more stringent.

1.8 WARRANTY

A. Textured Finishes Warranty: Provide 5-year materials integrity warranty and 5-year mold/mildew warranty from manufacturer for manufacturer’s approved substrates.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

1. Steel Framing and Furring:

a. Clark Steel Framing Systems.

b. Dale Industries, Inc. - Dale/Incor.

c. Dietrich Industries, Inc.

d. MarinoWare; Division of Ware Ind.

e. National Gypsum Company.

Public Address System Replacement 09260 - 4 Addendum No. 1

f. Unimast, Inc.

g. Western Metal Lath & Steel Framing Systems.

2. Gypsum Board and Related Products:

a. American Gypsum Co.

b. G-P Gypsum Corp.

c. National Gypsum Company.

d. United States Gypsum Co.

2.2 STEEL SUSPENDED CEILING AND SOFFIT FRAMING

A. Components, General: Comply with ASTM C 754 for conditions indicated.

B. Tie Wire: ASTM A 641/A 641M, Class 1 zinc coating, soft temper, 0.0625-inch-diameter wire, or double strand of 0.0475-inch- diameter wire.

C. Hanger Attachments to Concrete: As follows:

1. Anchors: Fabricated from corrosion-resistant materials with holes or loops for attaching hanger wires and capable of sustaining, without failure, a load equal to 5 times that imposed by construction as determined by testing according to ASTM E 488 by a qualified independent testing agency. Type: Postinstalled, expansion anchor.

2. Powder-Actuated Fasteners: Suitable for application indicated, fabricated from corrosion-resistant materials, with clips or other devices for attaching hangers of type indicated, and capable of sustaining, without failure, a load equal to 10 times that imposed by construction as determined by testing according to ASTM E 1190 by a qualified independent testing agency.

D. Hangers: As follows:

1. Wire Hangers: ASTM A 641/A 641M, Class 1 zinc coating, soft temper, 0.162-inch diameter.

2. Rod Hangers: ASTM A 510, mild carbon steel.

a. Diameter: As required.

b. Protective Coating: Corrosion-resistant paint.

3. Flat Hangers: Commercial-steel sheet, ASTM A 366/A 366M, with corrosion-resistant paint finish. Size: 1 by 3/16 inch by length indicated.

4. Angle Hangers: ASTM A 653/A 653M, G60, hot-dip galvanized commercial-steel sheet.

a. Minimum Base Metal Thickness: 0.0179 inch.

b. Size: 1-5/8 by 1-5/8 inches.

E. Carrying Channels: Cold-rolled, commercial-steel sheet with a base metal thickness of

0.0538 inch, a minimum 1/2-inch- wide flange, with manufacturer's standard corrosion-resistant zinc coating. Depth: 1-1/2 inches.

F. Furring Channels (Furring Members): Commercial-steel sheet with ASTM A 653/A 653M, G60, hot-dip galvanized zinc coating.

Public Address System Replacement 09260 - 5 Addendum No. 1

1. Cold Rolled Channels: 0.0538-inch bare steel thickness, with minimum 1/2-inch-wide flange, 3/4 inch deep.

2. Steel Studs: ASTM C 645.

a. Minimum Base Metal Thickness: 0.0179 inch.

b. Depth: As indicated.

3. Hat-Shaped, Rigid Furring Channels: ASTM C 645, 7/8 inch deep. Minimum Base Metal Thickness: 0.0179 inch.

4. Resilient Furring Channels: 1/2-inch- deep members designed to reduce sound transmission. Configuration: Asymmetrical or hat shaped, with face attached to single flange by a slotted leg (web) or attached to two flanges by slotted or expanded metal legs.

2.3 STEEL PARTITION & SOFFIT FRAMING

A. Components, General: As follows:

1. Comply with ASTM C 754 for conditions indicated.

2. Steel Sheet Components: Complying with ASTM C 645 requirements for metal and with ASTM A 653/A 653M, G40, hot-dip galvanized zinc coating.

B. Steel Studs and Runners: ASTM C 645.

1. Minimum Base Metal Thickness: 0.0179 inch.

2. Depth: As indicated.

C. Deep-Leg Deflection Track: ASTM C 645 top runner with 2-inch- deep flanges.

D. Proprietary Firestop Track: Top runner manufactured to allow partition heads to expand and contract with movement of the structure while maintaining continuity of fire-resistance-rated assembly indicated; in thickness not less than indicated for studs and in width to accommodate depth of studs. Available Product: Subject to compliance with requirements, products that may be incorporated into the Work include, but are not limited to, the following:

1. Fire Trak Corp.; Fire Trak attached to studs with Fire Trak Slip Clip.

2. Metal-Lite, Inc.; The System.

E. Flat Strap and Backing Plate: Steel sheet for blocking and bracing in length and width indicated. Minimum Base Metal Thickness: 0.0179 inch.

F. Cold-Rolled Channel Bridging: 0.0538-inch bare steel thickness, with minimum 1/2-inch- wide flange.

1. Depth: As indicated.

2. Clip Angle: 1-1/2 by 1-1/2 inch, 0.068-inch- thick, galvanized steel.

G. Hat-Shaped, Rigid Furring Channels: ASTM C 645.

Public Address System Replacement 09260 - 6 Addendum No. 1

1. Minimum Base Metal Thickness: 0.0179 inch.

2. Depth: As indicated.

H. Z-Shaped, Metal Furring Channels: ASTM C 645. Depth: 2 inches or as required to accommodate building insulation.

I. Resilient Furring Channels: 1/2-inch- deep, steel sheet members designed to reduce sound transmission. Configuration: Asymmetrical or hat shaped, with face attached to single flange by a slotted leg (web) or attached to two flanges by slotted or expanded metal legs.

J. Cold-Rolled Furring Channels: 0.0538-inch bare steel thickness, with minimum 1/2-inch- wide flange.

1. Depth: As indicated.

2. Furring Brackets: Adjustable, corrugated-edge type of steel sheet with minimum bare steel thickness of 0.0312 inch.

3. Tie Wire: ASTM A 641/A 641M, Class 1 zinc coating, soft temper, 0.0625-inch-diameter wire, or double strand of 0.0475-inch- diameter wire.

K. Fasteners for Metal Framing: Of type, material, size, corrosion resistance, holding power, and other properties required to fasten steel members to substrates.

2.4 INTERIOR GYPSUM WALLBOARD

A. Panel Size: Provide in maximum lengths and widths available that will minimize joints in each area and correspond with support system indicated.

B. Gypsum Wallboard: ASTM C 36. Type X:

1. Thickness: As indicated.

2. Long Edges: Tapered.

3. Location: As indicated.

2.5 EXTERIOR GYPSUM PANELS FOR CEILINGS & SOFFITS

A. Panel Size: Provide in maximum lengths and widths available that will minimize joints in each area and correspond with support system indicated.

B. Glass-Mat Gypsum Sheathing Board: ASTM C 1177/C 1177M. Available Product:

Subject to compliance with requirements, a product that may be incorporated into the Work includes, but is not limited to, "Dens-Glass Gold" by G-P Gypsum Corp. Core:

As indicated.

2.6 TILE BACKING PANELS

A. Panel Size: Provide in maximum lengths and widths available that will minimize joints in each area and correspond with support system indicated.

Public Address System Replacement 09260 - 7 Addendum No. 1

B. Glass-Mat, Water-Resistant Backing Board: ASTM C 1178/C 1178M.

1. Available Product: Subject to compliance with requirements, products that may be incorporated into the Work include, but are not limited to, "Dens-Shield Tile Backer" manufactured by G-P Gypsum Corp.

2. Core: As indicated.

C. Cementitious Backer Units: ANSI A118.9 at shower locations.

1. Available Products: Subject to compliance with requirements, products that may be incorporated into the Work include, but are not limited to, the following:

a. Custom Building Products; Wonderboard.

b. FinPan, Inc.; Util-A-Crete Concrete Backer Board.

c. United States Gypsum Co.; DUROCK Cement Board.

2. Thickness: 5/8 inch.

2.7 TRIM ACCESSORIES

A. Interior Trim: ASTM C 1047.

1. Material: Plastic.

2. Shapes:

a. Cornerbead: Use at outside corners.

b. LC-Bead: J-shaped; exposed long flange receives joint compound; use at exposed panel edges.

c. L-Bead: L-shaped; exposed long leg receives joint compound; use where indicated.

d. Expansion (Control) Joint: Use where indicated, or required.

B. Exterior Trim: ASTM C 1047.

1. Material: Hot-dip galvanized steel sheet or rolled zinc.

2. Shapes:

a. Cornerbead: Use at outside corners.

b. LC-Bead: J-shaped; exposed long flange receives joint compound; use at exposed panel edges.

c. Expansion (Control) Joint: One-piece, rolled zinc with V-shaped slot and removable strip covering slot opening. Use where indicated, or required.

2.8 JOINT TREATMENT MATERIALS

A. Comply with ASTM C 475.

B. Joint Tape:

1. Interior Gypsum Wallboard: Paper.

2. Glass-Mat Gypsum Sheathing Board: 10-by-10 glass mesh.

3. Tile Backing Panels: As recommended by panel manufacturer.

Public Address System Replacement 09260 - 8 Addendum No. 1

4. Toxicity/IEQ: Sheetrock Joint Tape. Paper; fiberglass joint tape not permitted.

C. Joint Compound for Interior Gypsum Wallboard: For each coat use formulation that is compatible with other compounds applied on previous or for successive coats.

1. Prefilling: At open joints and damaged surface areas, use setting-type taping compound.

2. Embedding and First Coat: For embedding tape and first coat on joints, fasteners, and trim flanges, use setting-type taping compound.

3. Fill Coat: For second coat, use setting-type, sandable topping compound.

4. Finish Coat: For third coat, use drying-type, all-purpose compound.

5. Toxicity/IEQ: Lime compound. All purpose joint and texturing compound containing inert fillers and natural binders. Pre-mixed compounds shall be free of antifreeze, vinyl adhesives, preservatives, biocides and other slow releasing compounds

D. Joint Compound for Exterior Applications: Glass-Mat Gypsum Sheathing Board: As recommended by manufacturer.

E. Joint Compound for Tile Backing Panels:

1. Glass-Mat, Water-Resistant Backing Panel: As recommended by manufacturer.

2. Cementitious Backer Units: As recommended by manufacturer.

2.9 ACOUSTICAL SEALANT

A. Available Products: Subject to compliance with requirements, products that may be incorporated into the Work include, but are not limited to, the following:

1. Acoustical Sealant for Non-fire rated assemblies.

a. Acoustical Sealant, U.S. Gypsum.

b. Acoustical Sealant, The Tremco Manufacturing Company.

c. AC20-FTR Acoustical Sealant, Pecora Chemical Corporation, Acoustical

Sealant 808, Protective Treatments, Inc.

d. SC-175 Water Based Sound Sealant, OSI.

2. Acoustical Sealant for Fire Rated assemblies.

a. CP 25 Caulk, 3M Corporation. Use 3M CP 25 N/S Caulk for penetrations of vertical partitions and CP 25S/L Caulk for penetrations of horizontal partitions.

b. Acoustical Sealant, Specified Technologies,

c. FS 1900 Series Sealant Intumescent Elastomeric Firestop, international

Protective Coatings, Inc.

B. Acoustical Sealant for Exposed and Concealed Joints: Nonsag, paintable, nonstaining, latex sealant complying with ASTM C 834 that effectively reduces airborne sound transmission through perimeter joints and openings in building construction as demonstrated by testing representative assemblies according to ASTM E 90.

Public Address System Replacement 09260 - 9 Addendum No. 1

C. Acoustical Sealant for Concealed Joints: Nondrying, nonhardening, nonskinning, nonstaining, gunnable, synthetic-rubber sealant recommended for sealing interior concealed joints to reduce airborne sound transmission.

2.10 AUXILIARY MATERIALS

A. Provide auxiliary materials that comply with referenced installation standards and manufacturer's written recommendations.

B. Steel Drill Screws: ASTM C 1002, unless otherwise indicated.

1. Use screws complying with ASTM C 954 for fastening panels to steel members from 0.033 to 0.112 inch thick.

2. For fastening cementitious backer units, use screws of type and size recommended by panel manufacturer.

C. Isolation Strip at Exterior Walls: Foam Gasket: Adhesive-backed, closed-cell vinyl foam strips that allow fastener penetration without foam displacement, 1/8 inch thick, in width to suit steel stud size.

D. Sound Attenuation Blankets: ASTM C 665, Type I (blankets without membrane facing) produced by combining thermosetting resins with mineral fibers manufactured from glass, slag wool, or rock wool. Fire-Resistance-Rated Assemblies: Comply with mineral-fiber requirements of assembly.

E. Thermal Insulation: As specified in Division 7 Section "Building Insulation."

2.11 TEXTURE FINISHES

A. Basis-of-Design Product: The design for the texture finish is based on Plexture “Landscape” B: Texture CT: Howard White, T: Fine CT: Howard White, products as manufactured by Triarch Industries, Inc., Houston, Texas, consistent with color and texture. Subject to compliance with requirements, provide either the named product or a comparable product.

1. Armourcoat, Polished Plaster.

2. Dryvit , Interior Architectural Coating.

B. Material Quality: Finished and fully cured (28 days) materials shall have the following minimum performance characteristics:

ASTM-E84 Flame Spread 25 or less Smoke Contribution 250 or less0

Solvent Resistance: (Ten minute soak) Water No Effect Detergent No Effect Ethanol (Alcohol) No Effect

Public Address System Replacement 09260 - 10 Addendum No. 1

Paint Thinner Temporary softening Bleach (household) No Effect Sodium Hypochlorite (Tile-X) No Effect 409 Cleaner No Effect

Vinegar No Effect

Stain Resistance: (1 hour soak and wash with 409 cleaner and water) Water no stain visible Blood no stain visible Urine no stain visible Coffee no stain visible Tea no stain visible Blueberry no stain visible Mustard no stain visible Bleach (household) no stain visible Sodium Hypochlorite (Tile-X) no stain visible

Mark Resistance: (marked with 24 hour cure, scrubbed with 409 cleaner and if necessary to remove the mark, bleach or alcohol) Pencil no mark visible Ball point pen no mark visible China Marker no mark visible Felt tip pen (non-permanent) no mark visible Abrasion Resistance: Taber Abraser Wear Index = 0.22

ASTM D 4060-90

Scrub Test: ASTM D 2486-89 3735 Cycles to failure

C. Material: Water base pure acrylic resin. Contains TEFLON and inorganic fillers.

1. VOC ASTM D 3960 0.86 lbs/gal or less

2. Perm Rating ASTM E 96B 21.93 Perms, English perms

3. Film Thickness:

a. Finecoat: 4 mils dry, 6 mils wet

b. Texture coat: 8-12 mils wet, 6-10 mils dry

D. Color Pigments: All pigments shall be light fast and fade resistant to discoloration by common commercial cleaning agents.

E. Primer: As recommended by textured finish manufacturer.

F. Provide “Textured Finish” at all gypsum board wall locations of all spaces with the exception of Mechanical Rooms, Electrical Rooms, Data Rooms, Storage Rooms, Janitor Rooms and Fire Protection Rooms

Public Address System Replacement 09260 - 11 Addendum No. 1

A. Examine areas and substrates, with Installer present, and including welded hollow-metal frames, cast-in anchors, and structural…