ATT_02a_Division_09_Finishes.pdf

1 Division 09 - Finishes

SECTION 09255- GYPSUM BOARD ASSEMBLIES

PART 1 - GENERAL

A. Summary:

1. This Section includes the following:

a. Non load-bearing steel framing members for gypsum board assemblies, unless otherwise indicated on drawings.

b. Gypsum board assemblies attached to steel framing.

B. Related Sections:

1. Division 5, Section “Structural Steel”.

2. Division 7, Section “Firestopping”.

C. Definitions:

1. Gypsum Board Construction Terminology:

a. Refer to ASTM C 11 and GA-505 for definitions of terms for gypsum board assemblies not defined in this section or in other referenced standards.

b. Refer to ASD basic load combinations in, AISI S240 and IBC for load bearing metal studs.

D. Assembly Performance Requirements:

1. Fire Resistivity: Fabricate and install gypsum board assemblies to have fire-resistance ratings indicated.

E. Standards:

1. Steel Framing Members: ASTM C653, ASCE 7-05, AISI S220 and ASTM C645, Section 10.

2. Gypsum Wallboard: ASTM C1396.

3. Cementitious Backer Units: ANSI A11.8.9.

F. Fire-Test- Response Characteristics:

1. Where fire-resistance-rated gypsum board assemblies are indicated or required by

Code, provide gypsum board assemblies that comply with ASTM E 119.

G. Submittals:

1. Submittals: Submit in accordance with Division 1 requirements.

2. Product Data: Manufacturer’s standard submittal package for each type of product specified.

3. Code Compliance Certification of Studs and Tracks: Provide documentation that framing members are certified in accordance with the Product-Certification

Program of the Steel Framing Industry Association (SFIA) or a similar organization that provides a verifiable code-compliance program.

4. Manufacturer’s Corrosion Resistance Evaluation report per Part 2, Para B, Line 7, d, 1.

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Section 09255- Gypsum Board Assemblies Cont.

H. Quality Assurance:

1. Single-Source Responsibility for Steel Framing: Obtain steel framing members for gypsum board assemblies from a single manufacturer, unless otherwise indicated.

2. Single Source Responsibility for Finishing Materials: Obtain finishing materials from either the same manufacturer that supplies gypsum broad or other panel products or from a manufacturer acceptable to gypsum board manufacturer.

3. Fire-Test-Response Characteristics: Where fire-resistance-rated gypsum assemblies are indicated, provide gypsum board assemblies that comply with the following requirements:

a. Gypsum board wall assemblies indicated are identical in materials and construction to those tested for the fire resistivity per ASTM E 119.

b. Fire-Resistance-Rated assemblies are indicated by design designation listed in the UL “Fire Resistance Directory”, or by Warnock Hersey or another qualified testing and inspecting agency.

4. Design framing systems in accordance with AISI S220, “North American

Specification for the Design of Cold-Formed Steel Framing- Nonstructural

Members” and ASTM C645, Section 10, unless otherwise indicated.

I. Delivery, Storage, and Handling:

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

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

3. Handle gypsum panels to prevent damage to edges, ends, and other surfaces.

4. Do not bend or otherwise damage metal trim and framing components.

5. Protect cold-formed metal framing from corrosion, deformation, and other damage during delivery, storage, and handling as required by AISI S202, “Code of

Standard Practice for Cold-Formed Steel Framing”.

J. Project Conditions:

1. Environmental Conditions, General: Establish and maintain environmental conditions for installing and finishing gypsum board complying with ASTM C

840 requirements or gypsum board manufacturer’s recommendations, whichever is more stringent.

2. Room Temperatures: For non-adhesive attachment of gypsum board to framing, not less than 40 deg F. For adhesive attachment and finishing of gypsum board, maintain a not less than 50 deg F. for 48 hours before application and continuously after until dry. Do not exceed 95 deg F. when using temporary heat source.

3. Ventilation: Ventilate building spaces as required to dry joint treatment materials.

Avoid drafts during hot, dry weather to prevent finishing materials from drying too rapidly.

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PART 2 - PRODUCTS

A. Manufacturers:

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

2. Basis-of-Design: The following products are the basis of design. Available manufacturers subject to compliance with requirements.

a. Steel Framing and Furring:

1. ClarkDietrich.

a. Additional acceptable manufacturer’s shall include:

1. SAFCO Steel Stud Co.

2. MarinoWARE Cold-Formed Steel Framing Products.

b. Grid Suspension Assemblies:

1. Armstrong World Industries, Inc.

2. USG Interiors, Corp.

3. Chicago Metallic Corp.

c. Gypsum Board and Related Products:

1. Georgia-Pacific Corp.

2. National Gypsum Co., Gold Bond Building Products Division

3. United States Gypsum Co.

B. Steel Framing Components for Suspended and Furred Ceilings:

1. General: Provide components complying with ASTM C754 for conditions indicated.

2. Post-installed Anchors in Concrete: Anchors of type indicated below, fabricated from corrosion-resistant materials, with holes or loops for attaching wires, and capability to sustain, without failure, a load equal to 5 times that imposed by ceiling construction, as determined by testing according to ASTM E 488, conducted by a qualified independent testing agency.

a. Chemical Anchor.

b. Expansion Anchor.

3. Power-Actuated Fasteners in Concrete: Fastener system of type suited for application indicated, fabricated from corrosion-resistant materials, with clips or other accessory devices for attaching hangers of type indicated, and with capacity to sustain, without failure, a load equal 10 times that imposed by ceiling construction, as determined by testing according to ASTM E 1190, conducted by a qualified independent testing agency.

4. Wire Ties: ASTM A 641 (ASTM A 641M), Class 1 zinc coating, soft temper,

0.062 inch thick.

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

6. Channels: Cold-rolled steel, 0.0538 inch minimum thickness of base

(uncoated) steel and 1/2 inch wide flanges, and as follows:

a. Carrying Channels: 1 1/2 inch deep, 475 lb. /1000 feet

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b. Furring Channels: 3/4 inch deep, 300 lb. /1000 feet

c. Finish: ASTM A 653, G 60 (ASTM A 653M, Z, 180) hot-dip galvanized coating for framing for exterior soffits and where indicated.

7. Steel Studs for Ceiling Framing: AISI S220 and ASTM C645, Section 10, with flange edges of studs bent back 90 degrees and doubled over to form 3/16 inch wide minimum lip (return), and complying with the following requirements for minimum thickness of base (uncoated) steel and for depth:

a. Product: ClarkDietrich; ProSTUD and ProTRAK 25 (25 EQ) 50 ksi with

Smart Edge technology or comparable product.

b. Thickness: 0.015 inch, unless otherwise indicated; 0.0296 for abuse-resistance/high-impact gypsum board, where indicated.

c. Depth: 3-5/8 inches, unless indicated otherwise.

d. Protective Coating: AISI S220, ASTM A653, G40 (ASTM A653M, Z120), or coating with equivalent corrosion resistance, hot-dip galvanized coating.

Galvannealed products are unacceptable.

1. Coating will demonstrate equivalent corrosive resistance with an evaluation report acceptable to AHJ.

2. Product: ClarkDietrich; DiamondPlus Coating on ProSTUD and

ProTRACK 25.

8. Steel Rigid Furring Channels: AISI S220, hat shaped, depth and minimum thickness of base (uncoated) steel as follows:

a. Product: ClarkDietrich; Hat-Shaped, Rigid Furring Channels, or comparable product.

b. Thickness: 0.0179 inch, unless otherwise indicated

c. Depth: 7/8 inch.

d. Protective Coating: AISI S220, ASTM A653, G40 (ASTM A 653M, Z120) or coating with equivalent corrosive resistance, hot-dip galvanized coating.

Galvannealed products are unacceptable.

C. Steel Framing for Walls and Partitions:

1. General: Provide steel framing members complying with the following requirements:

a. Protective Coating: AISI S220, ASTM A653, G40 (ASTM A 653M, Z120) or coating with equivalent corrosive resistance, hot-dip galvanized coating.

Galvannealed products are unacceptable.

2. Steel Studs and Runners: AISI S220, ASTM C645, Section 10, with flange edges of studs bent back 90 degrees and doubled over to form 3/16 inch wide minimum lip (return), and complying with the following requirements for minimum thickness of base (uncoated) steel and for depth:

a. Product: ClarkDietrich; ProSTUD and ProTRAK 25 (25 EQ) 50 ksi.

b. Typical Thickness: 0.0150 inch, unless otherwise indicated.

c. Thickness at head runner, sill runner, jamb, and cripple studs at door and other openings: 0.0329 inch

d. Depth: 3 5/8 inches, unless otherwise indicated.

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3. Deflection Track: Manufacturer’s top runner complying with the requirements in

AISI S220, and with 2 inch deep flanges.

a. Product: ClarkDietrich; BlazeFrame Deflection Track or comparable product.

4. Flexible Track: Adjustable top and bottom runners for radius partitions.

a. Product: ClarkDietrich; Interior Contour Track or comparable product.

5. Steel Rigid Furring and Runners: AISI S220, hat shaped, depth and minimum thickness of base (uncoated) steel as follows:

a. Product: ClarkDietrich; Furring Channel or comparable product.

b. Thickness: 0.0179 inch, unless otherwise indicated.

c. Depth: 7/8 inch.

6. Fasteners for Metal Framing: Provide fasteners of type, material, size, corrosion-resistant, holding power, and other properties required to fasten steel framing and furring members securely to substrates involved; complying with the recommendations of gypsum board manufacturer for applications indicated.

D. Gypsum Board Products:

1. General: Provide gypsum boards of types indicated in maximum lengths available that will minimize end-to-end joints in each area indicated to receive gypsum board application.

a. Widths: Provide gypsum board in widths of 48 inches.

2. Gypsum Wallboard: ASTM C1396 and as follows:

a. Type: Regular for vertical surfaces, unless otherwise indicated.

b. Type: Moisture Resistant (MR) boards in restrooms, kitchen areas, darkroom and where indicated.

c. Type: Water Resistant (WR) boards in shower rooms and locker room directly adjacent to shower rooms.

d. Type: Type X where required for fire-resistant-rated assemblies.

e. Type: Sag-resistant type for ceiling surfaces.

f. Type: 5/8 inch Type X fire rated for fire-rated partitions or propriety type as required for specific fire-resistant-rated assemblies indicated.

g. Edges: Tapered.

h. Thickness: 5/8 inch for all applications, unless otherwise indicated.

3. Gypsum Exterior Sheathing: Provide gypsum sheathing board complying with

ASTM C1396, and the following:

a. Type: Regular.

b. Thickness: 5/8 inch, unless otherwise indicated.

c. Style: Square edges and ends.

d. Size: 4’-0” x 8’-0”.

4. Gypsum Board Base Layer(s) for Multiple Applications: Gypsum wallboard, ASTM C1396, and as follows:

a. Type: Type X where indicated or required for fire-resistant-rated assemblies.

b. Type: Proprietary type matching that indicated for face layer and as required for specific fire-resistant-rated assemblies.

c. Edges: Manufacturer’s standard.

d. Thickness: 5/8 inch, unless otherwise indicated.

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5. Tile Backing Panels:

a. Install at all ceramic wall tile locations.

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

c. Cementitious Backer Units: 5/8” thickness complying with ANSI A11.8.9

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

1. Custom Building Products: Wonderboard

3. FinPan, Inc.: Util-A-Crete Concrete Backer Board

4. United States Gypsum Co.: DUROCK Cement Board

E. Trim Accessories:

1. Accessories for Interior Installation: Cornerbead, edge trim, and control joints complying with ASTM C 1047, and requirements indicated below:

a. Material: Formed metal complying with the following requirements:

1. Steel sheet, zinc coated by hot-dip process or rolled zinc.

b. Shapes: Shapes indicated below are referenced to Fig. 1 designations in ASTM

C 1047:

1. Cornerbeads on outside corners, unless otherwise indicated.

a. Product: ClarkDietrich; 103 Deluxe Cornerbead, or comparable product.

2. LC-bead with both face and back flanges; face flange formed to receive joint compound. Use LC-beads for edge trim, unless otherwise indicated.

a. Product: ClarkDietrich; Metal U-Trim M20A, or comparable product.

3. One-piece control joint formed with V-shaped slot and removable strip covering slot opening.

a. Product: ClarkDietrich; #093 Control Joint, or comparable product.

4. Reglets: “Frye-Reglet”, 5/8 inch wide, or an approved equal, at reglet

(grid) locations as indicated.

F. Joint Treatment Materials:

1. General: Provide joint treatment materials complying with ASTM C 475, and per recommendations of both the manufacturer of sheet products and of joint treatment materials of each application indicated.

2. Joint Tape for Gypsum Board: Paper reinforcing tape, unless otherwise indicated.

a. Use pressure-sensitive, open-weave, glass-fiber reinforced tape with compatible joint compound where recommended by manufacturer of gypsum board and joint treatment materials for application indicated.

3. Drying-Type Joint Compounds for Gypsum Board: Factory-packaged vinyl-based products complying with the following for formulation and intended use.

a. Ready-Mixed Formulation: Factory-mixed product.

1. Taping compound formulated for embedding tape and for first coat over fasteners and face flanges of trim accessories.

Section 09255- Gypsum Board Assemblies Cont.

2. Topping compound formulated for fill (second) and finish (third) coats.

3. All-purpose compound formulated for both taping and topping compounds.

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G. Miscellaneous Materials:

1. General: Provide auxiliary materials for gypsum board construction that complies with referenced standards and recommendations of gypsum board manufacturer.

2. Laminated Adhesive: Special adhesive or joint compound recommended for laminating gypsum panels.

3. Spot Grout: ASTM C 475, setting-type joint compound recommended for spot-grouting.

4. Steel drill Screws complying with ASTM C 1002 for the following:

a. Fastening gypsum board to steel members less than 0.033 inch thick

b. Fastening gypsum board to steel from 0.033 to 0.112 inch, ASTM C 954.

5. Runner Fasteners: Power-driven fasteners of type below and of size and material required to withstand loading conditions imposed on assemblies without exceeding allowable design stress of runners, fasteners, or structural substrates where anchors are imbedded.

6. Power-Actuated Fasteners: Provide power-actuated fasteners with the capability to sustain, without failure, a load equal to 10 times that imposed by assemblies.

7. Air Barrier: Tyvek Commercial Wrap or equal: ASTM D 226, Type I, no perforated.

8. Sound-Attenuation Blankets: Unfaced mineral-fiber blanket insulation produced by combining mineral fibers complying with ASTM C 665 for Type I.

9. Vertical Deflection: Provide “VertiClip”, or ClarkDietrich; Fast Top Clip FTC5, at interior head of walls where the top track is attached directly to a structural element of the building.

PART 3 – EXECUTION

A. Examination:

1. Examine substrates to which gypsum board assemblies attach or about, install hollow metal frames, cast-in-anchors, with installer present, for compliance with requirements for installation tolerances and other conditions affecting performance of assemblies specified in this Section. Do not proceed with installation until unsatisfactory conditions have been corrected.

B. Sprayed Fireproofing:

1. Before sprayed-on fireproofing is applied, if applicable, attached offset anchor plates or ceiling runners (tracks) to surfaces indicated to receive sprayed-on fireproofing. Where offset anchor plates are required, provide continuous units fastened to building structure not more than 24 inches o.c.

2. After sprayed-on fireproofing has been applied, if applicable, remove only as much fireproofing needed to complete installation of gypsum board assemblies without reducing thickness of fireproofing below that required to obtain fire-

8 Division 09 - Finishes resistance rating indicated. Protect remaining fireproofing from damage during gypsum board installation.

C. Installing Steel Framing, General:

1. Steel Framing Installation Standard: Install steel framing in compliance with

ASTM C 754, and with ASTM C 840 requirements that apply to framing installation.

2. Install supplementary framing, blocking, and bracing at terminations in gypsum board assemblies to support fixtures, equipment services, and heavy trim, grab bars, toilet accessories, furnishings, or similar construction. Comply with details indicated and with recommendations of gypsum board manufacturer, or, if none available, with United States Gypsum Co.’s “Gypsum Construction Handbook”.

3. Isolate steel framing from building structure or provide deflection/drift clips at to prevent transfer of loading by structural movement.

4. Do not bridge building control and expansion joints with steel framing members.

Independently frame both sides of joints with framing or furring members.

D. Installing Steel Framing for Suspended and Furred Ceilings:

1. Suspend ceiling hangers from building structural members and as follows:

a. Install hangers plumb and free from contact with insulation or other objects within ceiling plenum that are not part of supporting structural or ceiling suspension system. Splay hangers only where required to miss obstructions and offsets resulting in horizontal forces by gracing, counter splaying, or other equally effective means.

b. Where width of ducts and other construction within ceiling plenum produces hanger spacing that interfere with the locations of hangers required to support standard suspension system members, install supplemental suspension members and hangers in the form of trapezes or equivalent devices. Size supplemental suspension members and hangers to support ceiling loads within performance limits established by reference standards.

c. Secure wire hangers by looping and wire-tying, either directly to structures or to inserts, eye screws, or other devices and fasteners that are secure and appropriate for substrate, and in a manner that will not cause them to deteriorate or otherwise fail.

d. Do not attach hangers to steel roof deck. Attach hangers to structural members.

e. Do not connect or suspend steel framing from ducts, pipes, or conduits.

2. Install suspended steel framing components in sizes and at spacing indicated, but not less than required by the referenced steel framing installation standard.

a. Wire Hangers: 48 inches o.c.

b. Carrying Channels (Main Runners): 48 inches o.c.

Section 09255- Gypsum Board Assemblies Cont.

c. Furring Channels (Furring Members): 16 inches o.c.

3. Wire-tie or clip members to the main runners and to other structural supports as indicated.

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E. Installing Steel Framing for Walls and Partitions:

1. Install runners (tracks) at floors, structural walls, and columns where gypsum board wall assemblies where fire rating is required..

a. Where studs are indicated directly against exterior walls, install asphalt coating or strips between studs and wall.

2. Install typical gypsum board assembly to 6 inches above adjacent ceiling, unless otherwise indicated. Brace top runner back to structural element at 48 inches o.c.

3. Do not attach top runners to suspended ceilings.

4. Installation Tolerances: Install each steel framing and furring member so that the fastening surfaces do not vary more than 1/8 inch from the plane formed by the faces adjacent framing.

5. Extend partition framing full height to structural supports or substrates above suspended ceilings. Continue framing over frames for doors and openings, and frame around ducts penetrating partitions above the ceiling to provide support for gypsum board assembly.

a. Cut studs ½ inch short of full height to provide perimeter relief.

b. For fire-resistant-rated partitions that extend to the underside of the roof deck or floor slabs, structural framing, decking or other continuous solid structural surfaces to obtain ratings, install framing with deflection/drift clips.

6. Terminate partition framing at suspended ceilings where indicated.

7. Install steel studs and furring in sizes and spacing indicated:

a. Single-Layer Construction: Space studs at 16 inches o.c., unless otherwise indicated.

b. Multilayer Construction: Space studs at 12 inches o.c., unless otherwise indicated.

8. For curved partitions, install steel framing as follows:

a. Use flexible top and bottom runners (tracks) or cut top and bottom runners through leg and web at 12 inch intervals for arc length. In cutting lengths of runners, allow for uncut straight lengths of not less than 12 inches at end of arcs.

b. Bend runners to uniform curve of radius indicated and located straight lengths so they are tangent to arcs.

c. Support outside (cut) leg of runners by clinching a 1 inch high by 0.0209 inch thick steel sheet strip to inside of cut legs using metal lock fasteners.

d. Attach runners to floor and structural element, braced or directly, with fasteners located 2 inches from ends and spaces 12 inches o.c.

e. Begin and end each arc with a stud and space intermediate studs equally along arcs at stud spacing recommended by gypsum board manufacturer for radii indicated.

Section 09255- Gypsum Board Assemblies Cont.

9. Position studs vertically with open sides facing the same direction and engaging floor and ceiling runners. Attach studs to runners with 3/8 inch pan head framing screws.

10. Frame door openings to comply with GA-219, and with applicable published recommendations of gypsum board manufacturer, unless otherwise indicated.

Attach vertical studs at jambs either directly to frames or to jamb anchor clips on

10 Division 09 - Finishes door frames; install runner section (for cripple studs) at head and secure to jamb studs.

a. Install 2 studs at each jamb, unless otherwise indicated.

11. Frame openings, other than door openings, to comply with details indicated, or, if none is indicated, install as required for door openings. Install framing below sills of openings to match framing required above opening head.

F. Applying and Finishing Gypsum Board, General:

1. Gypsum Board Application and Finishing Standards: Install and finish gypsum panels in compliance with ASTM C 840 and GA-216.

2. Install sound-attenuation blankets, where indicated, prior to installing gypsum panels unless blankets are readily installed after panels have been installed on one side of the partition.

3. Install ceiling gypsum panels across framing in a manner that minimizes the number of abutting end joints and to avoid abutting end joints in the central area of each ceiling. Stagger abutting end joints of adjacent panel not less than one framing member.

4. Install gypsum panels with face side out. Do not install imperfect, damaged, or damp panels. Butt panels together for a light contact at edges and ends with not more than 1/16 inch of open space between panels. Do not force into place.

5. Locate both edge or end joints over supports, except ceiling applications where intermediate supports or gypsum board back-blocking is provided behind joints.

Do not place tapered edges against cut edges or ends. Stagger vertical joints on opposite sides of partitions. Avoid joints, other than control joints, at corners of framed openings where possible.

6. Spot grout hollow metal door frames for solid-core doors, hollow metal doors, and doors over 32 inches wide. Apply spot grout at each jamb anchor clip.

Immediately insert gypsum panels.

7. Grout hollow metal door frames continuously and solid at all fire rated doors.

8. Form control and expansion joints at locations indicated and as detailed, with space between edges of adjoining gypsum panels, as well as supporting framing behind gypsum panels.

9. Cover both faces of steel stud partition framing with gypsum panels in concealed spaces (above ceilings, etc.), except in un-rated chases, or chases that are braced internally.

a. Except where concealed application is indicated or required for sound, fire, air, or smoke ratings, coverage may be accomplished with drops of not less than 8 sq. ft. in area.

b. Fir gypsum panels around ducts, pipes, and conduits.

Section 09255- Gypsum Board Assemblies Cont.

c. Where partitions intersect open concrete coffers, concrete joists, and other structural members projecting below underside of floor/roof slabs and decks, cut gypsum panels to fit profile formed by such structural members; allow 1/4 to 3/8 inch wide joint to receive sealant.

d. Space fasteners in gypsum panels according to referenced gypsum board application and finishing standard and manufacturer’s recommendations.

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G. Gypsum Board Application Methods:

1. Single-Layer Application: Install gypsum wallboard panels as follows:

a. On ceilings, apply gypsum panels prior to wall/partition board application to the greatest extent possible and at right angles to framing, unless otherwise indicated.

b. On partition/walls, apply gypsum panels horizontally (perpendicular to framing), unless parallel application is required for fire-resistance-rated assemblies. Use maximum-length panels to minimize end joints.

1. Stagger abutting and joints not less than one framing member in alternate courses of board.

2. Multilayer Application on Partitions/Walls: Apply gypsum board indicated for base layer and gypsum wallboard face layers vertically (parallel to framing) with joints of base layers located over stud or furring member and face layer joints offset at least one stud or framing member with base layer joints. Stagger joints on opposite sides of partitions.

3. Single-Layer Fastening Method: Apply gypsum panels to supports as follows:

a. Fasten with screws in accordance with referenced standards.

4. Multilayer Fastening Method: Apply base layers of gypsum panels and face layer to base layer as follows:

a. Fasten both base layers and face layers separately to supports with screws in accordance with referenced standards.

5. For curved partitions, install gypsum panels as follows:

a. Select gypsum panel lengths and cut them as required to produce one unbroken panel covering each curved surface plus 12 inch long straight sections at ends of curves and tangent to them.

b. Wet gypsum panels on surfaces that will become compressed when panels are installed over a curve and where curved radius prevents using dry panels.

Comply with gypsum board manufacturer’s recommendations relative to curve radii, wetting methods, stacking panels after wetting, and other preparations that precede installing wetted gypsum panels.

c. Apply gypsum panels horizontally with wrapped edges perpendicular to studs. On convex side of partition, start begin installation at one end of curved surface and fasten gypsum panels to studs as panels are wrapped around the curve. On concave side of partition, start fastening panels to stud at center of curve and work outward to panel ends. Fasten panels to framing with screws at 8 inches o.c.

d. Allow wetted gypsum panels to dry before applying each layer, and applying joint compound.

H. Installing Trim Accessories:

1. General: For trim accessories with back flanges, fasten to framing with the same fasteners used to fasten gypsum board. Otherwise, fasten trim accessories according to accessory manufacturer’s directions for type, length, and spacing of fasteners.

12 Division 09 - Finishes

2. Install cornerbead at outside corners.

3. Install edge trim where edge of gypsum panels would otherwise be exposed.

Provide edge trim type with face flange formed to receive joint compound, except where other types are indicated.

a. Install LC-bead where gypsum panels are tightly abutted to other construction materials where back flange can be attached to framing or supporting framing member.

4. Install control joints at locations indicated.

I. Finishing Gypsum Board Assemblies:

1. General: Treat gypsum board joints, interior angles, and flanges of cornerbeads, edge trim, control joints, penetrations, fastener heads, surface defects, and elsewhere as required to prepare gypsum board surfaces for decoration.

2. Pre-fill open joints, rounded or beveled edges, and damaged areas using setting-type joint compound.

3. Apply joint tape over gypsum board joints, except those with trim accessories having flanges not requiring tape.

4. Levels of Gypsum Board finish: Provide the following levels of gypsum board finish per GS-214:

a. Level 1 for ceiling plenum areas, concealed areas, and where indicated, unless a higher level of finish is required for fire-resistance-rated assemblies and sound rated assemblies.

b. Level 5 for all exposed gypsum board surfaces.

5. Use the following joint compound combination as applicable to the finish levels specified:

a. Embedding and First Coat: Ready-mixed, drying-type, all-purpose or taping compound.

b. Fill (Second) Coat: Ready-mixed, drying-type, all-purpose or topping compound.

c. Finish (Third) Coat: Ready-mixed, drying-type, all-purpose or topping compound.

6. Where Level 5 gypsum board finish is indicated, embed tape in joint compound and apply first, fill, and finish coats of joint compound over joints, angles, fastener heads, and accessories; apply a thin, uniform skim coat of joint compound over entire surface. For skim coat, use joint compound specified for third coat, or a product formulated for this purpose and acceptable to gypsum board manufacturer.

7. Touch up and sand between coats as needed to produce a surface fee of visual defects, tool marks, and ridges and ready for decoration.

8. Where Level 1 gypsum board finish is indicated, embed tape in joint compound.

J. Field Quality Control:

1. Above-Ceiling Observation: ESD Inspector will conduct an above ceiling observation prior to installation of gypsum board ceilings and report any

13 Division 09 - Finishes deficiencies in the Work. Do not proceed with installation of gypsum board to ceiling support framing until deficiencies have been corrected.

a. Notify ESD Inspector one week in advance of the date and time when the

Project, or part of the Project, will be ready for an above-ceiling observation.

b. Prior to notifying Inspector, complete the following in areas to receive gypsum board ceilings:

1. Installation of lighting fixture rough-ins.

2. Installation of insulation, and leak and pressure testing of water piping systems.

3. Installation of air duct systems.

4. Installation of air devices.

5. Installation of mechanical system control air tubing.

6. Installation of ceiling support framing.

K. Cleaning and Protection:

1. Promptly remove any residual joint compound from adjacent surfaces.

2. Provide final protection and maintain conditions, in a manner acceptable to

Installer that ensure gypsum board assemblies are without damage or deterioration at until time of Substantial Completion.

End of Section- 09255

14 Division 09 - Finishes

SECTION 09310- CERAMIC TILE

a. Ceramic Tile.

b. Stone thresholds installed as part of the tile installations.

B. Related Sections include the following:

7. Division 3, Section “Cast-in-place Concrete”

8. Division 7, Section “Sealants and Caulks”

9. Division 4, Section “Cavity Wall Masonry System”

10. Division 9, Section “Gypsum Board Assemblies”

C. Definitions:

1. Modular Size: Actual tile size (minor facial dimension as measured per ASTM C

499).

2. Facial Dimension: Nominal tile size as defined by ANSI A137.1.

D. Performance Requirements:

1. Static Coefficient of Friction: For tile installed on walkway surfaces, provide products with the following values as determined by testing identical products per

ASTM C 1028.

a. Level Surfaces: Minimum 0.6, wet surface.

b. Step Treads: Minimum 0.6, wet surface.

c. Ramp Surfaces: Minimum 0.8, wet surface.

2. Load-Bearing Performance: For ceramic tile installed on walkway surfaces, provide installations rated for the following load-bearing performance levels, based on testing assemblies according to ASTM C 627, that are representative of those indicated for this Project:

a. Extra Heavy: Passes cycles 1 through 14.

b. Heavy: Passes cycles 1 through 12.

c. Moderate: Passes cycles 1 through 10.

d. Light: Passes cycles 1 through 6.

e. Residential: Passes cycles 1 through 3.

E. Submittals:

2. Product Data: For each type of tile, mortar, grout, and other products specified.

3. Tile Samples for Initial Selection: Manufacturer’s color chart consisting of actual tiles or sections of tiles showing color, texture, and pattern for each tile specified.

4. Grout Samples for Initial Selection: Manufacturer’s color chart consisting of actual grout or sections of grout showing each type of grout specified.

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Section 09310- Ceramic Tile Cont.

5. Samples for Verification: Of each item listed below, prepared on Samples of size and construction indicated. Where products involve normal color and textures, variations, include Sample sets showing the full range of variations expected.

a. Each type and composition of tile and for each color and texture required, at least 12 inches square, mounted on braced cementitious backer units, and with grouted joints using product complying with specified requirements and approved for complete Work in color or colors specified.

6. Qualification Data: For firms and persons specified in the Quality Assurance”

Article, to demonstrate their capabilities and experience. Include lists with names and addresses, of completed projects of comparable scope.

F. Quality Assurance:

1. Installer Qualifications: Engage an experienced installer who has completed tile installations similar in material, design, and extent to that indicated for this Project, and with a record of successful in-service performance.

2. Source Limitations for Tile: Obtain each color, grade, finish, type, composition, and variety of tile from one source with resources to provide products from the same production run for each contiguous area, of consistent quality of appearance and physical properties without delaying the Work.

3. Source Limitations for Setting and Grouting Materials: Obtain ingredients of a uniform quality for each mortar, adhesive, and grout component from a single manufacturer and each aggregate from one source or producer.

4. Source Limitation for Other Products: Obtain each of the following products specified in the Section from one source and by a single manufacturer for each product:

a. Stone thresholds.

b. Joint sealants.

G. Delivery, Storage, and Handling:

1. Deliver and store packaged materials in original containers with seals unbroken and labels intact until time of use. Comply requirements of ANSI A 137 for labeling sealed tile packages.

2. Prevent damage or contamination to materials by water, freezing, foreign matter, and other causes.

3. Handle with temporary protective coating on exposed surface to prevent coated surfaces from contacting backs or edges of other units. If coating does contact bonding surfaces of tile, remove coating from bonding surface before setting tile.

H. Project Conditions:

1. Environmental Limitations: Do not install tile until construction in spaces is completed. Ambient air temperature and humidity must be maintained to comply with referenced standards and manufacturer’s written instructions.

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PART 2 – PRODUCTS

A. Products, General:

1. ANSI Ceramic Tile Standard: Provide tile that complies with ANSI A 137.1

“Specifications for Ceramic Tile”, for types compositions, and other characteristics indicated.

a. Provide tile complying with Standard Grade requirements, unless otherwise noted.

b. For facial dimensions of tile, comply with requirements relating to tile size specified in Part B “Definitions” article.

2. ANSI Standards for Tile Installation Materials:

a. Provide materials complying with ANSI standards referenced in “Setting

Materials” and Grouting Materials” articles.

3. Factory Blending: For tile exhibiting color variations within the ranges specified, blend tile in the factory and package so the tile units taken from one package show the same range in colors as those taken from other packages and match approved color.

4. Mounting: Where factory-mounted tile is required, provide back- or edge-mounting tile assemblies as standard with manufacturer, unless another mounting method is indicated.

B. Manufacturers:

1. Available Products: Subject to compliance with requirements, products that may be incorporated into the Work include, but are not limited to those indicated in the ceramic tile Installation Schedule at the end of this Section.

C. Stone Thresholds:

1. General: Provide stone thresholds that are uniform in color and finish, fabricated to sizes and profiles indicated to provide transition between tile surfaces and adjoining finished floor surfaces.

a. Fabricate thresholds to heights indicated, but not more than ½ inch (12.7 mm) above adjoining finished floor surface, with transition edges beveled on a slope of no greater than 1:2.

2. Marble Thresholds: Provide marble thresholds complying with ASTM C 503 requirements for exterior use and with a minimum abrasive-hardness value of 10 per ASTM C 241.

a. Provide white, honed marble complying with the Marble Institute of

America’s Group A requirements for soundness.

D. Shower Pan Liners:

1. Basis-of-Design: The following products are the basis of design. Available manufactures subject to compliance with requirements.

2. Dal-Pan Shower Pan Liner as manufactured by Dal-Tile Corporation

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3. Product Description:

a. Flexible Polyvinyl Chloride (PVC) membrane.

b. Meets ASTM D4551 and is listed with IAPMO (File #3557)

c. Thickness: .040” (1.0 mm) for full mortar bed installation.

d. Accessories:

1. Outside Corners

2. PVC seaming cement

3. Dal-Sealant for drains, penetrations and seaming sheets together.

E. Setting Materials:

1. Portland Cement Mortar Installation Materials: Provide materials complying with

ANSI A 108.1A and as specified below:

a. Cleavage Membrane: Asphalt felt, ASTM D 226, Type I (No.5), or polyethylene sheeting ASTM D 4397, 4.0 mils (0.1 mm) thick.

b. Latex additive (water emulsion) described below, serving as replacement for part or all of gaging water, of type specifically recommended by the latex additive manufacturer for use in a latex grout bed.

c. Latex Additive: Acrylic resin.

2. Latex-Portland Cement Mortar: ANSI A 118.4, composed as follows:

a. Pre-packaged Dry-Mortar Mix: Factory prepared mixture of Portland cement, dry, redispersible, ethylene vinyl acetate additive; and other ingredients which only needs water added at Project site.

1. For wall applications, provide nonsagging, latex-portland cement mortar complying with ANSI A 118.4, for mortar of this type defined in Section

B.2.b.

3. Organic Adhesive: ANSI A 136.1, Type I.

4. Install white thin set at all floor tile locations.

F. Grouting Materials:

1. Sand-Portland Cement Grout: ANSI A108.10 composed of white or grey cement and white or colored aggregate as required to produce color indicated.

2. Latex-Portland Cement Grout: ANSI A118.6 for material described in Section

H-2.4, composed of the following:

a. Factory-Prepared, Dry-Grout Mixture: Factory-prepared mixture of portland cement; dry, redispersible, ethylene vinyl acetate additive; and other ingredients to produce the following:

1. Unsanded grout mixture for joints 1/4 inch joint widths.

3. For exterior applications use Exterior Grade, Frost/Freeze proof mud/grout, thin set adhesive.

G. Miscellaneous Materials:

1. Trowelable Underlayments and Patching Compounds: Latex-modified, portland cement-based formulation provided or approved by manufacturer of tile-setting materials for installations indicated.

2. Cement Board and Galvanized Anchors: As manufactured by DuraRock or an approved equal. Minimum thickness: 1/2" (nom).

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3. Metal Edge Strips: White-zinc-alloy terrazzo strips, 1/8 inch wide at top edge, with integral provision for anchorage to mortar bed or substrate, unless otherwise indicated.

4. Tile Cleaner: A neutral cleaner capable of removing soil and residue without harming tile and grout surfaces, specifically approved for materials and installations indicated by tile and grout manufacturers.

5. Grout Sealer: Manufacturer’s standard product for sealing grout joints, and does not change the color or appearance of grout.

a. Products:

1. Bonsal: W.R. Bonsal Co., Grout Sealer.

2. Bostik: CeramaSeal Grout Sealer.

3. Summitville Tiles, Inc.: SL-15, Invisible Seal Penetrating Grout and Tile

Sealer.

H. Mixing Mortars and Grout:

1. Mix mortars to comply with referenced standards, mortar grout manufacturer’s written instructions.

2. Add materials, water, and additives in accurate proportions.

3. Obtain and use type of mixing equipment, mixer, speeds, mixing containers, mixing time, and other procedures to produce mortars and grouts of uniform quality with optimum performance characteristics for installations indicated.

PART 3 – EXECUTOIN

1. Examine substrates, areas, and conditions where tile will be installed, with installer present, for compliance with requirements for installation tolerances and other optimum performance characteristics for installations indicated.

a. Verify substrates for setting tile are firm, dry, clean, and free from oil, waxy films, and curing compounds, and within flatness tolerances required by

ANSI A 108 series of tile installation standards for installations indicated.

b. Verify installation of grounds, anchors, recessed frames, electrical and mechanical units of work, and similar items located in or behind tile has been completed before installing tile.

c. Verify that joints and cracks in substrates are coordinated with the tile joint locations; if not coordinate, adjust latter in consultation with ESD Project

Manager.

d. Do not proceed with installation until unsatisfactory conditions have been corrected.

B. Installation, General:

1. ANSI Tile Installation Standards: Comply with part of ANSI A 108 series of the tile installation standards in “Specifications for Installation of Ceramic Tile”, that apply to types of setting and grouting materials and to methods indicated in ceramic tile installation schedules.

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2. TCA Installation Guidelines: TCA’s “Handbook for Ceramic Tile Installation”.

Comply with TCA installation methods indicated in ceramic tile installation schedules.

3. Extend the tile into recesses and under or behind equipment and fixtures to form a complete covering without interruptions, unless otherwise indicated.

Terminating Work neatly at obstructions, edges, and corners without disrupting pattern or joint alignments.

4. Accurately form intersections and returns. Perform cutting and drilling of tile without marring visible surfaces. Carefully grind cut edges of tile abutting trim, finish, or built-in items for straight aligned joints. Fit tile closely to electrical outlets, piping, fixtures, and other penetrations so plates, collars, or covers overlap tile.

5. Jointing Pattern: Lay tile in orthogonal grid pattern, unless otherwise indicated.

Align joint with adjoin tiles on floor, base, walls, and trim that are the same size.

Lay out tile work and center tile fields in both directions in each space or on each wall area. Adjust to minimize tile cutting. Provide uniform joint widths, unless otherwise indicated.

6. For tile mounted in sheets, make joints between tile sheets that same width as joints within tile sheets, so joints between tile sheets are not apparent in finished

Work.

7. Lay out wall tile from floor to ceiling, starting at the base and working up the wall.

8. Expansion Joints: Locate expansion joints and other sealant-filled joints, including control, contraction, and isolation joints, where indicated during installation of setting materials, mortar beds, and tile. Do not saw-cut joints after installing tiles.

a. For ceramic tile grouts (sand-portland cement, dry-set, commercial Portland cement, and latex-portland cement grouts), comply with ANSI A 108.10.

b. For chemical-resistant epoxy grouts, comply with ANSI A 108.6.

c. For chemical-resistant furan grouts, comply with ANSI A 108.8

C. Floor Tile Installation:

1. General: Install tile to comply with requirements in the Ceramic Tile Floor

Installation Schedule, including those referencing TCA installation methods and ANSI A 108 series of tile installation standards.

2. Install rectangular floor tile with long dimension perpendicular to the long dimension of the space to be tiled.

3. Install in a running bond pattern.

4. Joint Widths: Install tile on floor with 1/4 inch joint widths.

5. Lay out tile grout pattern with edge units no less than 3 inches in width.

6. Back Buttering: for installations indicated, obtain 100 percent mortar coverage by complying with applicable special requirements for back buttering of tile with reference to ANSI A 108 series of tile installation standards.

a. Tile floors in wet areas.

b. Tile floors composed of tile 8 by 8 inches or larger.

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c. Tile floors composed of rib-backed tiles.

7. Stone Thresholds: Install stone thresholds at locations indicated; set in same type of setting bed as abutting field tile, unless otherwise indicated.

a. Set thresholds in latex-portland cement mortar for locations where mortar bed would otherwise be exposed above flooring that finished flush with top of tile.

8. Metal Edge Strip: Install at all locations indicated or where exposed edge of tile flooring meets carpet, wood, or other flooring that finishes flush with top of tile.

D. Wall Tile Installation:

1. Install 1/2” cement board at all metal wall stud conditions in lieu of gypsum board and at all existing CMU walls conditions. Anchor with galvanized anchors, spacing per manufacturer’s recommendations.

2. Install all wall tile in a stacked bond pattern.

3. Lay out tile grout pattern with edge units no less than 2 inches in width.

4. Install types of tile designated for wall installations to comply with requirements in the Wall Tile Installation Schedule, including those referencing

TCA installation methods and ANSI setting-bed standards.

5. Joint Widths: Install tile on walls with 1/16 inch joint width.

E. Shower Pan Liner Installation:

1. Installations for concealed waterproofing.

2. Install on sloped subfloor under a full mortar bed (1.5” min.).

3. All upturns will be 6” (min)

4. Installer must be experienced and familiar with current written Dal-Pan instructions and applicable codes and standards, and Tile Council of North

America guidelines.

F. Cleaning and Protecting:

1. Cleaning: On completion of placement and grouting, clean all ceramic tile surfaces so they are free of foreign matter and grout haze or film.

a. Remove latex-portland cement grout from tiles as soon as possible.

b. Unglazed tile may be cleaned with acid solutions only when permitted by tile and grout manufacturer’s written instructions, but no sooner than 10 days after installation. Protect metal surfaces, cast iron, and vitreous plumbing fixtures from effects of acid cleaning. Flush surface with clean water before and after cleaning.

2. Grout Sealer: Apply grout sealer to grout joints according to grout-sealer manufacturer’s written instructions. As soon as grout sealer had penetrated grout joints, remove excess sealer and sealer that has gotten on tile faces by wiping with clean, soft cloth.

3. Finished Tile Work: Leave finished installation clean and free of cracked, chipped, broken, unbounded, and otherwise defective tile work.

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4. Provide final protection and maintain conditions in a manner acceptable to manufacturer and Installer that ensure tile is without damage or deterioration at the time of Substantial Completion.

a. When recommended by tile manufacturer, apply a protective caot of neutral protective cleaner to completed tile walls and floors. Protect installed tile work with kraft paper or other heavy covering during construction period to prevent staining, damage, and wear.

b. Prohibit foot and wheel traffic from tiled floors for at least 7 days after grouting is completed.

5. Before final inspection, remove protective covering and rinse tile surfaces with neutral cleaner.

G. Installation Schedule:

1. Manufacturer: Basis-of-Design: The following products are the basis of design.

Available manufactures subject to compliance with requirements.

Lobby and Corridor:

1. Floor Tile: Westmont, 12”x12”, BL94, Belmar

2. Base Tile: Westmont 3”x18” Bullnose, 94-123, Belmar

3. Grout Color: TEC, Wheat #982

Typical Restroom/Latrine:

1. Floor Tile: Westmont, 12”x12”, Clay, 89-123

2. Wall Tile (to floor): American Olean, 4”x4”, 0012, Almond

3. Grout Color: TEC, Light Smoke

Upgrade/Specialty Restrooms:

1. Walls:

a. Manufacture: Crossville

b. Model: Color By Numbers, 4”x8”

c. Color: WT18, Overture, Gloss

d. Grout Color: TEC, Silverado

2. Accent Band:

a. Manufacturer: Urban Collection

b. Model: Corduroy

c. Color: Clay Random Strip Mosaic,12”x16”

d. Grout Color: TEC, Silverado

e. Field cut into 6” band. Install at 64” a.f.f. to bottom of band. Install on all walls, including toilet stalls.

3. Wall Tile Trim:

a. Manufacturer: Crossville

b. Model: Color By Numbers

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1. 4”x12” Bullnose (available on 12” side)

2. 4”x6” Flat Top, Cove Base and Corners

b. Color- WT18, Overture, Gloss

c. Grout Color: TEC, Silverado

4. Floor Tile:

a. Manufacturer: Florida Tile

b. Model: Westmont, 12”x24”

c. Color: Quarry

d. Grout: TEC, Laticrete, Dove Gray

Locker Rooms:

1. Walls:

a. Manufacture: Urban Textures

b. Model: Urban Subway, 4”x16”

c. Color: White Gloss

d. Grout Color: TEC, Laticrete Bright White

2.