SECTION 09 21 16.23

GYPSUM BOARD SHAFT WALL ASSEMBLIES

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PART 1    GENERAL
1.1	SECTION INCLUDES
A.	Gypsum board shaft wall assemblies.
1.2	RELATED SECTIONS
A.	Section 09 21 16.23 - Gypsum Board Shaft Wall Assemblies.
B.	Section 09 90 00 - Painting and Coating.
1.3	SUBMITTALS
A.	Submit under provisions of Section 01 30 00 - Administrative Requirements.
B.	Product Data: Manufacturer's data sheets on each product to be used, including:
1.	Preparation instructions and recommendations.
2.	Storage and handling requirements and recommendations.
3.	Installation methods.
C.	Verification Samples: For each finish product specified, two samples, representing actual product and finish.
1.4	QUALITY ASSURANCE
A.	Manufacturer Qualifications: Minimum 5 year experience manufacturing similar products.
B.	Installer Qualifications: Minimum 2 year experience installing similar products.
C.	Performance: Fire, structural, and seismic performance meeting requirements of building code and local authorities.
D.	Mock-Up: Provide a mock-up for evaluation of surface preparation techniques and application workmanship.
1.	Finish areas designated by Architect.
2.	Do not proceed with remaining work until workmanship is approved by Architect.
3.	Refinish mock-up area as required to produce acceptable work.
1.5	PRE-INSTALLATION MEETINGS
A.	Convene minimum two weeks prior to starting work of this section.
1.6	DELIVERY, STORAGE, AND HANDLING
A.	Deliver and store products in manufacturer's unopened packaging bearing the brand name and manufacturer's identification until ready for installation.
B.	Handling: Handle materials to avoid damage.
1.7	PROJECT CONDITIONS
A.	Maintain environmental conditions (temperature, humidity, and ventilation) within limits recommended by manufacturer for optimum results. Do not install products under environmental conditions outside manufacturer's recommended limits.
1.8	SEQUENCING
A.	Ensure that products of this section are supplied to affected trades in time to prevent interruption of construction progress.
PART 2    PRODUCTS
2.1	MANUFACTURERS
A.	Acceptable Manufacturers: ______.
B.	Substitutions: Not permitted.
C.	Requests for substitutions will be considered in accordance with provisions of Section 01 60 00 - Product Requirements.
2.2	MATERIALS
A.	Gypsum Shaftwall Board:
1.	Material Standard: ASTM C1396.
2.	Type: Fire-resistant shaftwall board.
a.	Typical Thickness: 3/4 inch and 1 inch as applicable.
B.	Steel Framing for Shaftwall:
1.	Material Standard: ASTM C645.
2.	Attachment: Standard.
3.	Attachment: Resilient.
4.	Stud Thickness: 20 gauge (.0329 inch).
5.	Stud Thickness: 22 gauge (.0276 inch).
6.	Stud Thickness: 25 gauge (.0179 inch).
7.	Accessories: Furring channels, hangers and inserts.
PART 3    EXECUTION
3.1	EXAMINATION
A.	Do not begin installation until substrates have been properly prepared.
B.	If substrate preparation is the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding.
3.2	PREPARATION
A.	Clean surfaces thoroughly prior to installation.
B.	Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.
3.3	INSTALLATION
A.	Install in accordance with manufacturer's instructions and in proper relationship with adjacent construction.
1.	Installation standard, ASTM C754.
2.	Provide fire-rated systems where indicated and where required by authorities having jurisdiction.
3.	Install boards vertically. Do not allow butt-to-butt joints and joints that do not fall over framing members.
4.	Where new partitions meet existing construction, remove existing cornerbeads to provide a smooth transition.
5.	Provide insulation full height and thickness between different occupancies, and where required.
6.	Provide acoustical sealant at both faces at top and bottom runner tracks, wall perimeters, openings, expansion and control joints.
7.	Install trim in strict compliance with manufacturer's instructions and recommendations.
8.	Repair surface defects. Leave ready for finish painting or wall treatment.
B.	Tolerances: Not more than 1/16-inch difference in true plane at joints between adjacent boards before finishing. After finishing, joints shall be not be visible. Not more than 1/8 inch in 10 feet deviation from true plane, plumb, level and proper relation to adjacent surfaces in finished work.
3.4	PROTECTION
A.	Protect installed products until completion of project.
B.	Touch-up, repair or replace damaged products before Substantial Completion.

END OF SECTION