09 21 16 - GYPSUM BOARD ASSEMBLIES.pdf

MINISTRY OF HOUSING Western Sector Projects Sitework & Infrastructure OMRANIA and ASSOCIATES Project Specification

GYPSUM BOARD ASSEMBLIES SECTION 09 21 16 - 1

SECTION 09 21 16

GYPSUM BOARD ASSEMBLIES PART 1: GENERAL

1.01 SECTION INCLUDES

A. Gypsum Board assemblies for interior ceilings, including but not limited to:

1. Gypsum ceiling board.

2. Water resistant gypsum board for ceilings to wet areas..

3. Ceiling and soffit suspension systems.

4. Installation of access panels.

5. Framing members including ceiling runners, furring, channels, hangers and bracing.

6. Finishes and accessories including fasteners, anchors, acoustical sealant, insulation, joint compound and tape, and other accessories as required for installation.

7. Metal channel trimming and supports for fittings and equipment integrated in ceilings.

1.02 RELATED SECTIONS

A. Section 03 30 00 Cast in Place Concrete.

B. Section 09 51 00 Suspended Ceilings.

C. Division 21, 22 & 23 Mechanical.

D. Division 26 Electrical.

1.03 REFERENCES

A. ASTM C 36 Specification for Gypsum Wallboard.

B. ASTM A 366 Specification for Steel Sheet Carbon, Cold-Rolled, Commercial Quality.

C. ASTM C 79 Specification for Gypsum Sheathing Board.

D. ASTM C 442 Specification for Gypsum Backing Board and Core Board.

E. ASTM C 475 Specification for Joint Treatment Materials for Gypsum Wallboard Construction.

F. ASTM C 514 Specification for Nails for the Application of Gypsum Wallboard.

G. ASTM C 630 Specification for Water Resistant Gypsum Backing Board.

H. ASTM C 645 Specification for Non-Load (Axial) Bearing Steel Studs, Runners (Track), and Rigid Furring Channels for Screw Application of Gypsum Board.

I. ASTM C 754 Specification for Installation of Framing Members to Receive Screw Attached Gypsum Wallboard, Backing Board, or Water Resistant Backing Board.



J. ASTM C 840 Specification for Application and Finishing of Gypsum Board.

K. ASTM C 955 Specification for Load (Axial) Bearing Steel Studs, Runners (Track) and Rigid Furring Channels for Screw Application of Gypsum Baord.

L. ASTM C 1002 Specification for Steel Drill Screws for the Application of Gypsum Board.

M. ASTM E 119 Test Methods for Fire Tests of Building Construction and Materials.

N. GA-201 Gypsum Board for Walls and Ceilings.

O. GA-216 Recommended Specifications for the Application and Finishing of Gypsum Board.

P. GA-600 Fire Resistance Design Manual.

Q. NFPA National Fire Protection Association

R. IBC International Building Code

S. UL Fire Resistance Directory.

T. WH Warnock Hersey - Certificate Listing.

1.04 SUBMITTALS

A. Comply with Section 01 33 00.

B. Product Data: Submit copies of manufacturer's latest published literature for materials specified herein for approval.

C. Certificates: Submit test certificates for each assembly from a recognized testing authority confirming compliance with the required fire rating for each system and assembly.

D. Shop Drawings: Submit shop drawings including construction and system details, in large scale details, at including head jamb, sill, junction, penetration, fixing, trimming and adjoining works such as skirtings, ceilings etc.:

1. Submit plans for locations of wall, ceiling and soffit control joints.

2. Shop drawings shall include details of provisions made for trimming and supports for all wall mounted furniture and equipment for review and approval.

1.05 QUALITY ASSURANCE

A. Perform work in accordance with ASTM C 840 GA-201, GA-216, GA-505 and the Gypsum Association Fire Resistance Design Manual.

1.06 QUALIFICATIONS

A. Supplier and Erector: Company specializing in manufacturing and erecting work of this Section with minimum five years documented experience.

1.07 DELIVERY, STORAGE AND HANDLING


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



C. Store materials under cover and keep them dry and protected against damage from weather, direct sunlight, surface contamination, corrosion, construction traffic and other causes. Neatly stack gypsum boards flat to prevent sagging. Store channels and studs to avoid damage.

D. Handle gypsum boards to prevent damage to edges, ends and surfaces. Do not bend or otherwise damage metal corner beads and trim.

1.08 PROJECT CONDITIONS

A. Monitor environmental conditions for application and finishing Gypsum Wallboard Systems to comply with Gypsum Wallboard Systems manufacturer's recommendations.

B. For non-adhesive attachment of gypsum board to framing, maintain temperature no less than 5 oC. For adhesive attachment and finishing of gypsum board, maintain temperature no less than 10 o

C. Ventilate building spaces to remove water not required for drying joint treatment materials. Avoid drafts during dry, hot weather to prevent materials from drying too rapidly.

C for 48 hours prior to application and continuously thereafter until adhesive is dry.

1.09 PERFORMANCE REQUIREMENTS

A. Design and install gypsum drywall components so that the completed partition will withstand a minimum inward and outward pressure of 22 kg/m2

B. Anchors shall be field tested to ensure that they are capable of withstanding weight and local pressure conditions.

normal to the plane of the wall.

C. Deflection of shaft wall systems shall be limited to 1/240 of the span in height. PART 2: PRODUCTS 2.01 ACCEPTABLE MANUFACTURERS

Not used.

2.02 MATERIALS - GYPSUM BOARDS

A. To the greatest extent possible, provide all gypsum wall board systems from a single manufacturer. Where fire rated assemblies are listed, provide all components from a single manufacturer unless other manufacturers are listed as approved for use in the assembly by the rating bureau.

B. Gypsum wallboard to thickness and densities shown and specified to achieve performance requirements. Where fire resistive ratings are shown, use "Type X", of thickness required. Comply with following requirements:

1. Face Layer: ASTM C 36, with tapered edges. 2. Base Layer: ASTM C 36. 3. Water Resistant: ASTM C 630. 4. Soffit Board: ASTM C 931.

2.03 METAL COMPONENTS

A. Runners: ASTM C 645, roll formed galvanized steel, channel or angle shape, type, size and

gauge to comply with ASTM C 645.



B. Metal Studs: ASTM C 645 roll-formed galvanized steel; gauge, studs shall comply with the requirements of ASTM C 645 and shall not be less than 6.3 mm "ST" and "CWS", for interior partitions, ceilings and fireproofing.

C. Resilient Channel: "RC-1", galvanized steel channel for resilient attachment of wallboard only.

D. Furring Channels: "Rigid Furring Channel"; ASTM C 645, roll-formed galvanized steel, flanged channel type, for wall furring and ceiling attachment.

E. Concealed Mounting Plate Reinforcements: Galvanized 1 mm, minimum, sheet steel complying with ASTM A 366. Provide plates 150 mm wide, minimum width by full length of supported item. Provide concealed mounting plates for all items secured to partitions. Verify specific thicknesses, loads and sizes and mounting needs with individual item suppliers. For items with requirements which exceed the performance of concealed mounting plate reinforcements, refer to Section 05 50 00. Incorporate miscellaneous metal provisions within gypsum board system.

F. Metal Trim Accessories: Provide trims designed to receive joint compound finishing. All corner reinforcement, angle and channel metal trim, control joints, and partition end caps shall be galvanized.

G. Aluminum Trim: Extruded or formed aluminum trim with 6.25 mm dia. holes in fins for attachment to drywall, staggered 12.5 mm; longest lengths available; primed for finish painting. Provide type determined by Engineer.

2.04 SUSPENSION SYSTEM FOR CEILINGS

A. Primary Suspension Members: Provide direct type ceiling suspension for each type of system specified hereinafter. All materials galvanized.

B. Provide primary suspension components complying with ASTM C 635 Classification "Heavy Duty", severe atmospheric conditions.

C. Provide primary suspension components of suitable design and adequate strength to support the acoustic materials, light fixtures, diffusers and other items attached to or hanging from the ceiling system.

D. Finish to lines and levels shown, with maximum deflection not to exceed 1/360 of the span between supports.

E. Wire Hanger Inserts: No. 6 galvanized wire loop and 0.55 mm galvanized shell or 2 mm galvanized steel strap with 8 mm hole.

F. Hanger Anchorage Devices: Screws, clips, bolts or other devices applicable to the indicated method of structural anchorage for ceiling hangers. Provide anchorage devices sized for three (3) times the calculated load supported.

G. Hangers; Indirect Hung Grid: 4.7 mm x 25 mm steel straps or 6.3 mm diameter steel rods, galvanized.

H. Carrying Channels; Indirect Hung Grid: ASTM C 754, cold rolled steel channels, 40 mm.

I. Special Runner Supports and Suspension Members: Where spacing of supports along runner members are in excess of 1.2 m and up to 2.4 m, the following steel channel runner members, spaced 1.2 m on centers shall be installed:

1. For spans not more than 1.5 m (50 mm channel): 0.870 kg/m.

2. For spans not more than 1.8 m (65 mm channel): 1 kg/m.



3. For spans not more than 2.4 m (65 mm channel): 1.2 kg/m.

4. For spans 1.8 m to 2.4 m, provide mid-span 50 mm channel bridging continuous over and secured to top flange of each of three runners.

5. Where distance between supports exceeds 2.4 m, runners shall be supported from required steel support framing in accordance with the requirements of Section 05 50 00.

2.05 MISCELLANEOUS ACCESSORIES

A. Fasteners: Screws and other fasteners shall be in accordance with the recommendations of the approved gypsum board manufacturer conforming to reference standards. Screws shall be self-drilling, self-tapping, bugle head type, length to suit gypsum board thickness and shall be corrosion-resistant.

B. For securing to concrete or masonry, use hardened steel concrete stub nails of sufficient length to provide permanent fastening. For all other applications involving gypsum drywall comply with wallboard manufacturer's printed recommendations.

C. Joint Treatment Materials: ASTM C 475, joint compound, joint tape and finishing compound; asbestos-free.

D. Fiberglass Joint Reinforcement: Glass fiber open weave tape, 50 mm wide.

E. Laminating Adhesive: Multi-purpose joint compound.

F. Acoustic sealant: Non-hardening, non-skinning for use with gypsum board as recommended by board manufacturer.

G. Water Resistant: Sealant suitable for use with gypsum board as recommended by board manufacturer.

H. Ties: Comply with the requirements of Underwriters' Laboratories, Inc., and the wallboard manufacturer for the following types:

1. ASTM C 754, 1.3 mm tie wire.

2. 12.5 mm x 0.4 mm steel strapping.

I. Sound Attenuation Blankets: As specified in Section 07 21 16.

J. Water: Clean and free of deleterious material.

K. Neoprene Pad: Moisture resistant insulating material, 6.3 mm thick sponge type, closed cell neoprene, Durometer A of 40.

L. Accessories: Clips, splices and other accessories required to complete the work, including 1.9 mm anchor plates, angles or channels to secure partition head to structural members.

PART 3: EXECUTION 3.01 EXAMINATION


B. Verify that site conditions are ready to receive work and opening dimensions are as indicated on shop drawings.



C. Verify measurements and dimensions at the project site and cooperate in the coordination and scheduling of the work of this Section with the work of related trades, with particular attention given to the installation of items installed in gypsum board, so as not to delay project progress.

3.02 INSTALLATION/APPLICATION/ERECTION

A. Install gypsum ceilings and other items as indicated in the Contract Documents, and in accordance with applicable provisions of codes, regulations and standards referred to herein including Gypsum Association GA-201 and 216. All gypsum board to receive paint shall receive thin coat plaster finish; joints shall not read through finishes.

B. Provide fire retardant gypsum board in locations where gypsum board is indicated on the Drawings for fire resistive or fireproof construction. Fire retardant gypsum board shall be installed in accordance with the requirements of the National Fire Protection Association and in accordance with the testing procedures and listing of Underwriters' Laboratories, Inc.

C. Do not apply gypsum board construction over mechanical or electrical work which requires inspection and approval until such inspection has been made and the work approved by the proper authority and the Engineer. Ensure that insulation, if required, has been completed to walls, pipes and other items. Neglect of this instruction will nullify any claims for extra payment for removal and replacement of construction to determine if such work, when intended to pass through and finish flush with finished face of board, has been properly aligned to receive the board.

D. Allowable Tolerances: 1.6 mm offsets between planes of board faces, and 6.3 mm in 2.4 m for plumb, level and bow.

E. Finished work shall be rigid, secure, square, level and plumb with allowance for thermal movement. Erect interior partitions to withstand cycled positive and negative pressures without detrimental effects to performance or appearance. Comply with load requirements specified in Paragraph 1.09 of this Section.

F. Permissible Deflections: Provide bracing in wall construction, reduce stud spacing or increase metal thickness as necessary to avoid exceeding the following:

1. Ceramic Tile Finish: L/360

2. Paint Wall Covering or Unfinished: L/240

3. In partitions, provide horizontal bracing, maximum spacing 1200 mm on center at 1/3 points where studs exceed 3.67 m length.

4. Curved work shall be sprung evenly, framed and erected to maintain the finish dimensions and contours indicated.

G. Ceilings shall be erected in such a manner as to avoid damage due to racking deformation, including the separation of face and base layers, liner panels, peeling, blistering, other effects and the binding of doors in frames. Install metal accessory trim beads back to back or pre-manufactured control joints as required to prevent cracking or other defects in gypsum board work due to building movements, live and dead loads and wind loads. Maintain necessary clearances of board from edge channels.

H. Construct Gypsum Board fire separations and enclosures according to the requirements of referenced standards. Provide accessories and hardware so that the necessary resistances are achieved.

I. Continue gypsum board construction in fire and sound rated separations through the ceiling to the underside of the structure above, except where otherwise indicated on the Drawings.



J. Furred Ceilings and Suspended Ceilings:

1. Hangers: Shall be spaced a maximum of 1200 mm on center. Attach to channels spaced at maximum 1200 mm on center.

2. Attach furring channels to channel runners at 400 mm spacing on centre at right angles to runners and securely wire tied in place. Provide end splices by nesting channels no less than 200 mm and securely wire tied to each other.

3. Furring at concrete ceilings shall be done with furring channels placed at maximum 1200 mm spacing on center or as detailed, and securely fastened.

K. Gypsum Board:

1. Carefully cut gypsum boards to the required sizes with cut edges and ends of the board sandpapered to obtain neat jointing.

2. Apply gypsum board with the reverse side against the framing members. Separate boards shall be in moderate contact. In no cases shall boards be forced into place. At interior and exterior corners, cut edges of boards shall be concealed by overlapping them with abutting boards. Stagger gypsum board so that the corners of any four boards will not meet at the same point. Vertical joints shall not occur on the same stud on both sides of a partition.

3. Apply gypsum board with the long dimension at right angles to the steel stud framing members. Use horizontal application unless vertical application results in fewer joints.

4. Screw boards to furring members as recommended by manufacturer. Seal joints with joint tape and cover with joint compound as specified herein.

5. Drive in screws slightly below the surface of the board, taking care not to crush the core of the board or the surface of the paper, with screw heads forming a slight depression below the surface of the Gypsum Board. Gypsum Board adjacent to the point of fastening shall be held tightly against framing members while driving screws. Use of screws to draw the gypsum board against framing members shall not be acceptable.

6. Multiple Layers: Where multiple layers are shown on the Drawings, apply laminating adhesive to back of face layers and laminate in place using moderate pressure to ensure adequate bond. Offset joints of each layer and secure with Type "G" screws spaced along vertical third points and at horizontal center of face layer.

7. Water-Resistant Gypsum Board:

a. Install water-resistant (W/R) gypsum board as indicated on architectural drawings. Exposed faces of water-resistant gypsum board shall receive a 3mm skim coat of gypsum plaster.

8. Lamination of Gypsum Board to Concrete and Masonry:

a. Where shown on the Drawings, gypsum board may be laminated to concrete or masonry where no insulation and furring is required.

b. Concrete and masonry surfaces shall be clean, smooth, dry and free of foreign matter.

c. Fill pockets or holes greater than 100 mm in diameter and 3 mm deep with laminating material (joint compound) and allow to dry prior to laminating. Grind smooth rough surfaces or protrusions before beginning laminating work.

d. Cut gypsum board face panels to the proper size for the full floor-to-ceiling dimension, allowing a continuous clearance (3 mm to 6 mm) at the floor.



e. Position face panels vertically to provide a tight fit at abutting long edges. If panel is in contact with floor at any point, cut back panel to provide 3 mm minimum clearance. Use moderate pressure to develop full adhesive contact with concrete or masonry surfaces. Care shall be taken to avoid unnecessary impact on board after placement.

f. Provide bracing of face panels until the joint compound dries (minimum 48 hours) in accordance with industry standards.

L. Install accessories, including access doors and frames furnished under other Contracts, where indicated and where required to complete and fulfill work requirements.

M. Control Joints: Install control joints in areas as recommended by drywall manufacturer. Obtain Engineer's approval for all locations. In fire rated partitions, install control joints in accordance with manufacturer's recommendations and so as not to compromise specified ratings. In general provide the following:

1. Walls and Partitions: Distance between control joints shall not exceed 9 m. Locate control joints over door frames to the greatest extent possible. Do not locate joint on opposite faces of wall or partitions in same locations.

2. Ceilings and Soffits: Distance between control joint shall not exceed 15.25 m in any direction.

N. Joints, Corners, Screw Depressions:

1. Comply with applicable requirements of GA-201 and GA-216 by the Gypsum Association, except where more detailed or more stringent requirements are indicated, including the recommendations of the manufacturer.

2. Joints:

a. First Step: Joint cement, mixed as directed by the manufacturer's printed instructions shall be forced into the joints of boards with a scraping knife. Fill channels evenly, using moderate pressure on the knife. Apply reinforcing tape over the full length of the joint. The tape shall be embedded in the cement, using moderate pressure on the knife. Remove excess cement, after which the tape shall be given a thin coating of cement. Fill vertical end joints with cement and tape in a similar manner. The cement shall be sanded only as may be necessary.

b. Second Step: Apply a second coating of joint cement to the joints. The coating shall be feathered out as far as may be necessary to obtain a smooth surface.

c. Third Step: After the second coating has dried, apply a very thin coating and again feathered and left as smooth as possible. If necessary, sand joints lightly with 200 grit sandpaper or wet sponge to leave a smooth, flush surface. Care shall be taken not to scuff the paper surface of the gypsum board when sandpapering the cement.

3. Screws: Boards shall fit tightly against the supporting framework. Screw depressions shall be concealed. Fill depressions with 3 coats of joint cement and each coat shall be allowed to dry before the succeeding coat or treatment is applied. Where necessary, sand last coat with 200 grit sandpaper or wet sponge so as to leave a smooth finish flush with the paper face of the Gypsum Board.

4. Corner and Edge Treatment:

a. Treat internal corners in the manner specified for joints, except that the reinforcing tape shall be folded lengthwise through the middle and fitted neatly into the corner.



b. External corners shall be one-piece sheet metal treated after application with a joint cement as specified for joints. The corners shall receive a metal corner reinforcement of not lighter than 0.55 mm rolled sheet steel, 19 mm radius, bullnose tape-on bead, engaged over the ends or edges of the Gypsum Board, true to line.

3.03 CLEANING, PROTECTION AND PATCHING

A. Comply with Sections 01 73 29 and 01 77 00.

B. Be responsible for cutting and patching of defects appearing in the Gypsum Board work, after the work of other trades has been completed, regardless of how, or by whom, the damage was caused. Patching shall be neatly and properly made to match the original work. Portions of the work damaged beyond repair shall be removed and replaced with new material at no additional cost to the Owner.

C. Clean and repair surfaces soiled or damaged in connection with the work of this Section to the approval of the Engineer. Pay the cost of replacing finishes or materials that cannot be satisfactorily cleaned.

D. Upon completion of the work, remove debris, equipment and excess material resulting from the work of this Section from the site.

E. Protect completed work from damage through construction period.

END OF SECTION