079500 expansion control.pdf

F5W61608 USPFO Warehouse Ohio Army National Guard Rev. 0 Defense Supply Center Columbus, Ohio 30 January 2009 Bid Final

EXPANSION CONTROL 079500 - 1

SECTION 079500 - EXPANSION CONTROL

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes architectural joint systems for building exteriors.

1.2 SUBMITTALS

A. Shop Drawings: Provide placement drawings, including line diagrams and details.

1.3 QUALITY ASSURANCE

A. Product Options: Drawings are based on the specific systems indicated. Refer to Division 1 Section.

1. Do not modify intended aesthetic effects, as judged solely by Architect, except with Architect's approval.

1.4 COORDINATION

A. Coordinate installation of exterior wall joint systems with roof expansion assemblies specified in Division 7.

PART 2 - PRODUCTS

2.1 MATERIALS

A. Aluminum: ASTM B 221, Alloy 6063-T5 for extrusions; ASTM B 209, Alloy 6061-T6 for sheet and plate.

1. Apply manufacturer's standard protective coating on aluminum surfaces to be placed in contact with cementitious materials.

2. Mill Finish.

B. Moisture Barrier: EPDM, minimum 45 mils thick.

C. Accessories: Manufacturer's standard anchors, fasteners, and other accessories as required for complete installations.

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2.2 ARCHITECTURAL JOINT SYSTEMS, GENERAL

A. General: Provide joint systems of design indicated.

1. Furnish in longest practicable lengths to minimize splicing. Install with hairline mitered corners where joint changes direction.

2. Include factory-fabricated closure materials and transition pieces to provide continuous joint systems.

B. Design architectural joint systems for the following size and movement characteristics:

1. Nominal Joint Width: 2 inch.

2. Movement Capability: 100 percent movement.

2.3 ARCHITECTURAL JOINT SYSTEMS FOR BUILDING EXTERIORS

A. Basis-of-Design Product: Subject to compliance with requirements, provide the products specified in individual subparagraphs below as basis-of-design products or a comparable product by one of the following:

1. Construction Specialties, Inc.

2. JointMaster/InPro Corporation.

3. MM Systems Corporation.

4. Nystrom, Inc.

5. Watson Bowman Acme Corp.

B. Architectural Joint Systems for Exterior Wall to Wall (Corner):

1. Basis-of-Design Product: Balco Inc 9WC-2.

2. Type: Vertical cover-plate.

a. Exposed Metal: Aluminum.

1) Finish: Mill.

b. Secondary Seal: Manufacturer's standard seal designed to prevent water and moisture infiltration.

C. Architectural Joint Systems for Exterior Roof to Wall:

1. Basis-of-Design Product: Balco Inc LPRE-2.

2. Type: Horizontal cover-plate.

a. Exposed Metal: Aluminum.

1) Finish: Mill.

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b. Secondary Seal: Manufacturer's standard seal designed to prevent water and moisture infiltration.

D. Expanding Foam Sealant:

1. Basis-of-Design Product: EMSEAL Joint Systems 25V.

2. Foam shall be open cell polyurethane foam impregnated with an acrylic polymer-modified, water-based asphalt emulsion. Alternates containing wax or wax compounds shall not be permitted. Impregnation agent to have proven non-migratory characteristics. Compression when expanded in joint shall be at approximately 25 percent of its uncompressed dimension (4x compression).

2.4 FINISHES

A. Comply with NAAMM's "Metal Finishes Manual for Architectural and Metal Products" for recommendations for applying and designating finishes.

B. Appearance of Finished Work: Noticeable variations in same piece are not acceptable.

PART 3 - EXECUTION

3.1 PREPARATION

A. Prepare substrates according to manufacturer's written instructions.

B. Coordinate and furnish anchorages, setting drawings, and instructions for installing joint systems. Provide fasteners of metal, type, and size to suit type of construction.

3.2 INSTALLATION

A. Comply with manufacturer's written instructions for storing, handling, and installing architectural joint assemblies and materials unless more stringent requirements are indicated.

B. Metal Frames: Perform cutting, drilling, and fitting required to install joint systems.

1. Install in true alignment and proper relationship to joints and adjoining finished surfaces measured from established lines and levels.

2. Adjust for differences between actual structural gap and nominal design gap due to ambient temperature at time of installation.

3. Cut and fit ends to accommodate thermal expansion and contraction of metal without buckling of frames.

4. Locate in continuous contact with adjacent surfaces.

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5. Support underside of frames continuously to prevent vertical deflection when in service.

6. Locate anchors at interval recommended by manufacturer, but not less than 3 inches from each end and not more than 24 inches o.c.

C. Seals in Metal Frames: Install seals in frames to comply with manufacturer's written instructions. Install with minimum number of end joints.

1. Provide in continuous lengths for straight sections.

2. Seal transitions according to manufacturer's written instructions.

D. Water Barrier: Provide water barrier at exterior joints and where called for on Drawings.

3.3 PROTECTION

A. Do not remove protective covering until finish work in adjacent areas is complete.

B. Protect the installation from damage by work of other Sections.

END OF SECTION 079500