architecture - engineering - construction
AECinfo.com
Printable version Bookmark this page Notify a colleague or friend about this page Bookmark and Share
  The Vistawall Group  

GLAZED ALUMINUM CURTAIN WALL (CW250 WALL). CSI 3-Part Specifications.

GUIDE

SPECIFICATION

 

Manufacturer:

Vistawall Architectural Products

P.O. Box 629

803 Airport Road

Terrell, Texas 75160

Voice (214) 551-6100

Data (214) 551-6264

SECTION 08925 - GLAZED ALUMINUM CURTAIN WALL (CW250 WALL)

*************************************************************************************************

This guide specification has been prepared by Vistawall Architectural Products in printed and electronic media as an aid to specifiers in preparing written construction documents for glazed aluminum curtain wall systems.

This section includes aluminum exterior curtain wall systems for multi-story cladding, shop fabricated, factory prefinished. This section can be modified to incorporate louvers, granite, marble, or insulated infill panels.

Sections 01411 are intended for use along with this section; coordinate requirements accordingly.

Sealants are referenced to Section 07900, Sealants Sealers.

Glass and glazing are referenced to Section 08810, Glass and Glazing.

Firestopping is referenced to Section 07270.

Where a storefront, sloped glazing system, or skylight integrates with curtain wall system, carefully coordinate both sections to function together, or alternately include extracts from sections 0841X and 08960 in this section as appropriate.

Refer to AAMA Curtain Wall Design Guide Manual for description of the rain screen principle and pressure equalized wall design. Rain screen is usually used on sophisticated curtain walls in northern climates.

Edit entire master to suit project requirements. Modify or add items as necessary. Delete items which are not applicable. Words and sentences within brackets [_____] reflect a choice to be made regarding inclusion or exclusion of a particular item or statement. This section may include performance, proprietary, and descriptive type specifications. Edit to avoid conflicting requirements.

Editor notes are included within the text of this section to assist the specifier in knowledgeable decision-making.

*************************************************************************************************

 

PART 1 - GENERAL

 

1.01 SUMMARY

A. Related Documents: Conditions of the Contract, Division 1 - General Requirements, and Drawings apply to Work of this Section.

*************************************************************************************************

Edit this paragraph to briefly describe the contents of the section. After editing section, refer back to this paragraph to verify no conflicts exist.

*************************************************************************************************

B. Section Includes:

1. Aluminum curtain wall systems, complete with reinforcing, shims, anchors, [operable concealed vents] and attachment devices.

2. Accessories necessary to complete Work.

C. Products Furnished But Not Installed Under this Section: Inserts and anchoring devices which are to be built into structure.

*************************************************************************************************

This document incorporates CSI (Construction Specifications Institute) Manual of Practice principles of cross referencing to Division 1 sections and other sections. The cross references must be edited to retain only those other sections used. Other guide specifications for Vistawall Architectural Products, including those of Naturalite/EPI Skylights are available as follows:

Section 07720 - Heat and Smoke Vents

Section 07821 - Acrylic Unit Skylights

Section 07822 - Glass Unit Skylights

Section 07825 - Metal Framed Skylights

Section 08411 thru 08413 - Aluminum Entrances and Storefronts.

Section 08450 - All Glass Entrances.

Section 08490 - Sliding Mall Fronts.

Section 08950 - Translucent Panel System

*************************************************************************************************

D. Related Sections:

1. Section 01411 - Exterior Curtain Wall Testing.

2. Section 01430 - Mock-Ups.

3. Section 05500 - Metal Fabrications.

4. Section 06100 - Rough Carpentry.

5. Section 07211 - Batt and Blanket Insulation.

6. Section 07270 - Firestopping.

7. Section 07900 - Joint Sealers.

8. Section 0841X - Aluminum Entrances and Storefronts.

9. Section 08450 - All Glass Entrances.

10. Section 08470 - Revolving Entrance Doors.

11. Section 08490 - Sliding Mall Fronts.

12. Section 08520 - Aluminum Windows.

13. Section 08710 - Door Hardware.

14. Section 08810 - Glass and Glazing.

15. Section 08960 - Sloped Glazing System.

16. Section 12511 - Horizontal Louver Blinds.

*************************************************************************************************

List reference standards that are included within the text of this section. Edit the following as required for project conditions.

*************************************************************************************************

1.02 REFERENCES

A. Aluminum Association (AA):

1. DAF-45 Designation System for Aluminum Finishes.

B. American Architectural Manufacturers Association (AAMA):

1. Aluminum Curtain Wall Design Guide Manual.

2. 501.2 Field Check of Metal Curtain Walls for Water Leakage.

3. 605.2 Voluntary Specification for High Performance Organic Coatings on Architectural Extrusions and Panels.

4. 606.1 Specifications and Inspection Methods for Integral Color Anodic Finishes for Architectural Aluminum.

5. 607.1 Specifications and Inspection Methods for Clear Anodic Finishes for Architectural Aluminum.

6. 608.1 Specification and Inspection Methods for Electrolytically Deposited Color Anodic Finishes for Architectural Aluminum.

7. 701.2 Specifications for Pile Weatherstripping.

8. Manual #10 Care and Handling of Architectural Aluminum From Shop to Site.

C. American National Standards Institute (ANSI):

1. Z97.1 Specifications and Methods of Test for Safety Glazing Material Used in Buildings.

D. American Society for Testing and Materials (ASTM):

1. A36 Structural Steel.

2. A123 Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products.

3. A525 General Requirements for Steel Sheet, Zinc-Coated (Galvanized) by the Hot-Dip Process.

4. A526 Sheet Steel, Zinc Coated (Galvanized) by the Hot-Dip Process, Commercial Quality.

5. B209 Aluminum and Aluminum-Alloy Sheet and Plate.

6. B221 Aluminum-Alloy Extruded Bars, Rods, Wire, Shapes, and Tubes.

7. B308 Aluminum-Alloy 6061-T6 Standard Structural Shapes, Rolled or Extruded.

8. C509 Cellular Elastomeric Preformed Gasket and Sealing Material.

9. C716 Installing Lock-Strip Gaskets and Infill Glazing Materials.

10. C864 Dense Elastomeric Compression Seal Gaskets, Setting Blocks and Spacers.

11. C920 Elastomeric Joint Sealants.

12. E283 Rate of Air Leakage Through Exterior Windows, Curtain Walls, and Doors.

13. E330 Structural Performance of Exterior Windows, Curtain Walls, and Doors by Uniform Static Air Pressure Difference.

14. E331 Test Method for Water Penetration of Exterior Windows, Curtain Walls, and Doors by Uniform Static Air Pressure Difference.

15. E773 Test Method for Seal Durability of Sealed Insulating Glass Units.

16. E774 Sealed Insulating Glass Units.

E. Consumer Product Safety Commission (CPSC):

1. 16 CFR 1201 Safety Standard for Architectural Glazing Materials.

F. Federal Specifications (FS):

1. TT-P-645A Primer, Paint, Zinc Chromate, Alkyd Type.

G. Flat Glass Marketing Association (FGMA):

1. Glazing Manual.

H. Steel Structures Painting Council (SSPC):

1. SP2 Hand Tool Cleaning.

2. SP3 Power Tool Cleaning.

3. Paint 12 Cold-Applied Asphalt Mastic (Extra Thick Film).

*************************************************************************************************

Use this article carefully; restrict statements to identify system performance requirements or function criteria only. Delete paragraphs not appropriate to project.

Performance specifying permits system manufacturers the latitude to adjust or redesign proprietary systems to achieve specified requirements. Rely on this article as the "anchor" for curtain wall system specifying and minimize the material and component statements so not to conflict with performance criteria.

Edit system requirements carefully and include only applicable performance criteria. Make sure there is no conflict with proprietary information listed in part 2.

*************************************************************************************************

1.03 SYSTEM REQUIREMENTS

A. General Standard: In addition to requirements shown or specified, comply with applicable provisions of Aluminum Curtain Wall Design Guide Manual for design, materials, fabrication and installation of component parts.

B. Design Requirements:

*************************************************************************************************

Retain appropriate first item below; delete the others. Refer to AAMA "Aluminum Curtain Wall Design Guide Manual" for clarification of stick framed systems vs unit framed systems. Members of stick framed systems are installed independently of each other and are not pre-assembled. Unit framed systems are factory pre-assembled and installed as unit.

*************************************************************************************************

1. Metal stick framed systems with interior and exterior exposed metal framing.

[2. Operable vent with sight line concealed from the exterior. Perimeter members to be integral with window wall framing.]

3. System manufacturer shall provide low profile entrance frames as an integral part of the curtain wall system.

4. System manufacturer shall provide curtainwall systems, including necessary modifications to meet specified requirements and maintaining visual design concepts.

5. Fabricate glazing systems for interior [exterior] glazing at vision areas and exterior [interior] glazing at spandrel areas.

6. Perimeter conditions shall allow for installation tolerances, expansion and contraction of adjacent materials, and sealant manufacturer's recommended joint design.

7. Drawings are diagrammatic and do not purport to identify nor solve problems of thermal or structural movement, glazing, anchorage or moisture disposal.

8. Requirements shown by details are intended to establish basic dimension of unit, sight lines and profiles of members.

9. Do not assume glass, sealants, and interior finishes contribute to framing member strength, stiffness, or lateral stability.

10. Assemblies shall be free from rattles, wind whistles and noise due to thermal and structural movement and wind pressure.

11. Attachment considerations are to take into account site peculiarities and expansion and contraction movements so there is no possibility of loosening, weakening or fracturing connection between units and building structure or between units themselves.

12. Anchors, fasteners and braces shall be structurally stressed not more than 50% of allowable stress when maximum loads are applied.

13. Allow for expansion and contraction due to structural movement without detriment to appearance or performance.

14. System shall drain to exterior face of wall, water entering joints and condensation occurring within system by drain holes and gutters of adequate size to evacuate water without infiltration to interior or the top of lower lites of glass. No visible weep holes allowed.

15. Provide continuous interior gutter system at sill which drains to exterior through weep holes. Head members shall also have gutter system which drains directly to exterior or drains internally to sill below.

16. Provide concealed fastening.

17. Metal faces are required to be visually flat under all lighting conditions, subject to acceptance of Architect.

18. Use rigid isolators to maintain flatness of face cap.

19. Provide uniform color and profile appearance at components exposed to view.

20. Provide interior closed cell polymeric sponge gasket with sealed corners, with maximum 30% compression when glazed, to create a water and air seal.

21. Provide pre-punched pressure plates to ensure correct quantity and spacing of fasteners.

*************************************************************************************************

Retain item below when structural silicone glazing is utilized.

*************************************************************************************************

[22. Stresses placed on structural silicone sealants shall be kept within sealant manufacturer's recommended maximum.]

23. Not Permitted: Vibration harmonics, wind whistles, noises caused by thermal movement, thermal movement transmitted to other building elements, loosening, weakening, or fracturing of attachments or components of system.

*************************************************************************************************

Coordinate performance requirements with section 01411.

6.24 psf is equal to a 50 mph wind. Air infiltration requirements for curtain wall systems range from 0.06 cfm/sq. ft. up to 0.01 cfm/sq. ft.

*************************************************************************************************

C. Performance Requirements:

1. Air infiltration: Air leakage [including concealed vent option] shall not exceed 0.01 cfm per square foot of surface area when tested in accordance with ASTM E283 at differential static pressure of 6.24 psf.

2. Water infiltration: No uncontrolled leakage when tested in accordance with ASTM E331 at test pressure of 15.0 psf, or 20% of full positive design wind load, whichever is greater.

*************************************************************************************************

Coordinate wind loads with applicable building code, or appropriate wind loads may be determined by using ANSI A58.1-1982, "Minimum Design Loads for Buildings and Other Structures".

Boundary layer wind tunnel testing may be necessary for determining design wind loads when building shape is other than rectangular in plan, site location has unusual wind conditions, or building is critically located with respect to other nearby buildings.

Deflection of L/175 is industry standard. Maximum deflection of 3/4 inch is usually acceptable. Stiffer walls of L/240 with 1/2 inch maximum deflection should only be used on high quality monumental work.

Edit following paragraph accordingly. Coordinate provisions with Section 01411.

*************************************************************************************************

D. Structural Requirements:

1. Wind loading:

a. Basic zones: Resist wind pressure of [25] [__] psf positive and [25] [___] psf negative.

b. Corner zones: Resist wind pressure of [40] [__] psf positive and [60] [__] psf negative for areas extending [10] [___] feet from corners.

[c. Parapet zones: Resist wind pressure [____] psf positive and [____] psf negative.]

2. Deflection under uniform loading: When tested in accordance with ASTM E330 at design pressure, maximum deflection of exterior member shall not exceed L/175 of span or 3/4 inch [L/240 of span or 1/2 inch], whichever is less.

3. Parallel to wall and corner mullion deflections: 75% of glass edge bite or 3/8 inch, whichever is less.

4. Compression flanges of flexural members may be assumed to receive effective lateral bracing only from:

a. Anchors to building structure and

b. Horizontal glazing rails or interior trim which are in actual contact with compression flange.

5. Do not regard points of contraflexture as lateral braces or as end points of unbraced length; unbraced length is actual distance between effective lateral braces as defined above.

6. Where framing member reaction is resisted by continuous element, maximum assumed effective length of the resisting element is 4 times bearing length, but not more than 12 inches.

E. Thermal Requirements: Framing systems shall accommodate expansion and contraction movement due to surface temperature differential of 180F without causing buckling, stress on glass, failure of joint seals, excessive stress on structural elements, reduction of performance or other detrimental effects.

[F. Laboratory Testing: Refer to Section 01411 for requirements.]

G. Interface:

1. Furnish inserts and anchoring devices which need to be preset and built into structure to appropriate trade.

2. Supply on timely basis to avoid delay in Work.

3. Instruct other trades of proper location and position.

4. Furnish setting drawings, diagrams, templates and installation instructions.

*************************************************************************************************

Include submittal requirements below which are consistent with scope of project and extent of work of this section. Only request submittals which are absolutely necessary.

*************************************************************************************************

1.04 SUBMITTALS

A. General: Submit in accordance with Section 01300.

B. Product Data:

1. Submit manufacturer's descriptive literature for each manufactured products.

2. Include information for factory finishes, accessories and other required components.

*************************************************************************************************

Retain item below when manufacturer's standard colors are specified for pigmented finishes; coordinate with finish article.

*************************************************************************************************

[3. Include color charts for finish indicating manufacturer's standard colors available for selection.]

C. Shop Drawings:

1. Submit shop drawings bearing seal and signature of Professional Structural Engineer registered in State where Project is located.

2. Submit drawings indicating elevations, detailed design, dimensions, member profiles, joint locations, arrangement of units, member connections, and thickness of various components.

3. Show following items:

a. Details of special shapes.

b. Reinforcing.

c. Drainage details and flow diagrams.

d. Anchorage system.

e. Interfacing with building construction.

f. Provisions for expansion and contraction.

[g. Thermal breaks.]

4. Indicate glazing details, methods, [locations of various types and thickness of glass] [, emergency breakout locations,] and internal sealant requirements.

5. Clearly indicate locations of exposed fasteners and joints for Architect's acceptance.

6. Clearly show where and how manufacturer's system deviates from Contract Drawings and these Specifications.

[D. Mock-up Drawings: Submit drawings for mock-ups; refer to Section 01430 for mock-up requirements.]

*************************************************************************************************

Retain data within brackets in first subparagraph when pigmented finish is specified; coordinate with article 2.07.

*************************************************************************************************

E. Samples:

1. Submit samples indicating quality of finish [in required colors] on alloys used for work, 12 inches long for extrusions and 6 inches square for sheet materials.

2. Where normal texture or color variations are expected, include additional samples illustrating range of variation.

[3. Submit samples of structural glazing gaskets, 12 inch lengths.]

[4. Submit samples of sealants for color selection.]

***** OR *****

[5. Submit samples of custom color sealants.]

*************************************************************************************************

Following paragraph permits option to submit results of pre-tested existing fixed window designs. Retain when applicable.

*************************************************************************************************

[F. Test Reports: Submit certified copies of previous tests reports by independent laboratory substantiating performance of system. Include other supportive data as necessary.]

G. Certificates:

1. Submit manufacturer's certification stating that installed system is in compliance with specified requirements.

2. Submit statement certified by Professional Engineer attesting components [, including frames and glass,] will withstand design wind loads and that maximum allowable deflections will not be exceeded.

H. Qualification Data: Submit certification of installer qualifications issued by system manufacturer.

*************************************************************************************************

Retain data within brackets in paragraph below for structural silicone glazed system.

*************************************************************************************************

I. Manufacturer's Instructions: Submit manufacturer's printed installation instructions. [Include detailed instructions describing each step of reglazing procedures.]

J. Warranty: Submit specified warranties.

*************************************************************************************************

Include quality assurance requirements consistent with size and scope of project and extent of work of this section. Edit following article accordingly.

*************************************************************************************************

1.05 QUALITY ASSURANCE

*************************************************************************************************

Vistawall Architectural Products is unique in the industry in single source responsibility. First, system design,

extrusion, fabrication, and finishing occur at the same facility, and under strict tolerances, assuring uniformity of profile and finishes between systems. Second, Vistawall products include a full array of storefront, curtainwall, all glass entrances, sliding mall fronts, sloped glazing, and flush faced aluminum framed doors, as well as all the monumental and unit skylight products manufactured by Naturalite/EPI, allowing the designer and specifier a single source of responsibility when combining products from any of these categories.

*************************************************************************************************

A. Single Source Responsibility:

1. Provide curtainwall systems that are products of a single manufacturer.

[2. Operable vents with concealed sight lines and opaque panels for curtain wall systems are required as Work of this Section for single source responsibility.]

B. Engineer Qualifications: Professional Structural Engineer registered in State where Project is located.

C. Installer Qualifications: Certified in writing by system manufacturer as qualified for specified systems.

*************************************************************************************************

Depending on scope of work, mock-ups may not be required; retain and edit following article accordingly. Ensure section 01430 includes details for each mock-up required.

*************************************************************************************************

[1.06 MOCK-UPS

A. Visual Mock-up: Provide mock-up to demonstrate visual features and workmanship; refer to Sections 01400 and 01430 for requirements.

B. Test Mock-up: Provide mock-up for laboratory testing; refer to Sections 01400 and 01430 for requirements. [Visual mock-up must be approved by Architect prior to construction of test mock-up.]]

*************************************************************************************************

Depending on scope of work, preinstallation conference may not be required. Retain article below when applicable and edit accordingly.

*************************************************************************************************

[1.07 PREINSTALLATION CONFERENCE

A. Conduct preinstallation conference in accordance with Section 01200.

*************************************************************************************************

Retain paragraph below when structural silicone glazing is required.

*************************************************************************************************

[B. Conference Purpose and Agenda:

1. Arrange with Architect and representatives of window and sealant manufacturer to visit Project site [factory] before beginning glazing operations to analyze site conditions, and inspect surfaces and joints to be sealed in order that recommendations may be made should adverse conditions exist.

2. Discuss following items:

a. Weather conditions under which work will be done.

b. Anticipated frequency and extent of joint movement.

c. Joint design.

d. Glazing procedures.]

 

1.08 DELIVERY, STORAGE, AND HANDLING

A. Comply with requirements of Section 01600.

B. Protect finished surfaces to prevent damage.

C. Do not use adhesive papers or sprayed coatings which become firmly bonded when exposed to sun.

D. Do not leave coating residue on surfaces.

*************************************************************************************************

Retain two following paragraphs when glass is included as work of this section.

*************************************************************************************************

[E. Deliver glass units with manufacturer's labels intact on interior side of glass. Ensure labels indicate glass thickness, unit location, glass strength and orientation of units in vertical position.]

[F. Protect glass edges and corners to prevent chipping, cracking, and other similar damages.]

1.09 PROJECT CONDITIONS

A. Ensure ambient and surface temperatures and joint conditions are suitable for installation of materials.

1.10 WARRANTY

*************************************************************************************************

Note: Longer warranty periods are available at additional cost.

*************************************************************************************************

A. Provide warranties in accordance with Section 01700.

B. Provide written warranty in form acceptable to Owner jointly signed by manufacturer, installer and Contractor warranting work to be watertight, free from deflective materials, defective workmanship, glass breakage due to defective design, and agreeing to replace components which fail within 1 year from date of Substantial Completion.

C. Warranty shall cover following:

1. Complete watertight and airtight system installation within specified tolerances.

2. Completed installation will remain free from rattles, wind whistles and noise due to thermal and structural movement and wind pressure.

3. Sloped glazing system is structurally sound and free from distortion.

4. Glass and glazing gaskets will not break or "pop" from frames due to design wind, expansion or contraction movement or structural loading.

5. Glazing sealants and gaskets will remain free from abnormal deterioration or dislocation due to sunlight, weather or oxidation.

*************************************************************************************************

Delete paragraph below if high performance fluoropolymer finish not used.

*************************************************************************************************

D. Provide written warranty stating organic coating finish will be free from fading more than 10%, chalking, yellowing, peeling, cracking, pitting, corroding or non-uniformity of color, or gloss deterioration beyond manufacturer's descriptive standards for 5 years from date of Substantial Completion and agreeing to promptly correct defects.

PART 2 - PRODUCTS

 

2.01 MANUFACTURERS AND PRODUCTS

*************************************************************************************************

In this article, list the manufacturers acceptable for this project.

*************************************************************************************************

A. Subject to compliance with requirements indicated, provide products by one of the following:

1. Vistawall Architectural Products, Terrell, TX.

B. Substitutions: Submit under provisions of Section 01630, a minimum of 10 days prior to bid date.

*************************************************************************************************

Edit the following paragraphs for appropriate system in each category and delete remaining. Refer to Vistawall technical literature for additional information.

When specifying manufacturer's standard product or manufacturer's standard product with modifications, describe using manufacturer's name and model numbers.

*************************************************************************************************

C. Acceptable Systems:

*************************************************************************************************

Vistawall curtainwall systems included in this section are as follows:

CW-250 - 2-1/2" x 5-1/2", 5-3/4", 6-1/4", 6-1/2", or 7-1/4" mullion profiles ; pressure glazed, front set, interior loaded, stick wall system; available with butt glazed vertical option; can accommodate both 1/4" and 1" glazing.

CW-250 with 4500-CV Concealed Vent - 2-1/2" x 5-3/4" or 7-1/4" mullion profiles; pressure glazed, front set, stick wall system, with concealed ventilating devices; available with butt glazed vertical option. Can be used with both 1/4" and 1" glazing.

*************************************************************************************************

1. CW-250 Curtain Wall System [with 4500-CV concealed vents].

2.02 FRAMING MATERIALS AND ACCESSORIES

A. Aluminum:

1. ASTM B221, alloy 6063-T5 for extrusions; ASTM B209, alloy 5005-H16 for sheets; or other alloys and temper recommended by manufacturer appropriate for specified finish.

2. Minimum thickness of 0.125 inch for framing members and 0.050 inch for glazing stops and similar components.

B. Internal Reinforcing:

1. ASTM A36 for carbon steel; or ASTM B308 for structural aluminum.

2. Shapes and sizes to suit installation.

3. Shop coat steel components after fabrication with alkyd type zinc chromate primer complying with FS TT-P-645.

C. Inserts and Anchorage Devices:

1. Manufacturer's standard formed or fabricated assemblies, steel or aluminum, of shapes, plates, bars or tubes.

2. Hot-dip galvanize steel assemblies after fabrication, comply with ASTM A123, 2.0 ounce minimum coating.

***** OR *****

[3. Shop coat steel assemblies after fabrication with alkyd type zinc chromate primer complying with FS TT-P-645.]

D. Fasteners:

1. Non-magnetic stainless steel or cadmium plated steel coated with yellow or silver iridescence plating, compatible with materials being fastened.

2. Series 300 stainless steel for exposed locations. Cadmium plated steel with 0.0005 inch plating thickness and color chromate coated for concealed locations.

3. Provide nuts or washers of design having means to prevent disengagement; deforming of fastener threads is not acceptable.

4. Provide concealed fasteners wherever possible.

5. For exposed locations, provide countersunk flathead fasteners with finish matching item fastened.

E. Expansion Anchor Devices: Lead-shield or toothed-steel, drilled-in, expansion bolt anchors.

F. Shims: Non-staining, non-ferrous, type as recommended by system manufacturer.

G. Protective Coatings: Cold applied asphalt mastic complying with SSPC-Paint 12, compounded for 30 mil thickness for each coat; or alkyd type zinc chromate primer complying with FS TT-P-645.

H. Glazing Gaskets:

1. Compression type design, exterior replaceable, extruded neoprene. Interior is a closed cell sponge tape gasket.

2. Comply with ASTM C509 or C864.

3. Profile and hardness as necessary to maintain uniform pressure for watertight seal.

4. Manufacturer's standard black color.

*************************************************************************************************

The following is an option with this system.

*************************************************************************************************

[5. Factory molded corners required at exterior.]

I. Internal Sealants: Types recommended by system manufacturer to remain permanently elastic, tacky, non-drying, non-migrating and weathertight.

[J. Curtain Wall Insulation and Fire Safing: Refer to Sections 07200 and 07270.]

*************************************************************************************************

Retain paragraph below if architectural aluminum panels are required in curtain wall.

*************************************************************************************************

[K. Spandrel Panels and Exterior Column Covers [Soffits and Metal Ceilings]:

1. Type: Aluminum sheet, 1/8 inch thick, suitably reinforced on concealed surface for surface flatness, or prefabricated sandwich panels at manufacturer's option.

2. Surface flatness: 0.015 inch maximum deviation when measured with 6 inch rule.

3. Squareness: 0.002 inch maximum for each inch of length at panel edge.

4. Anchorage: Allow for expansion and contraction, to minimize oilcanning and distortion.]

L. CONCEALED VENT COMPONENTS

1. Model 4500 concealed vent providing a ventilation system that is completely concealed from the exterior when in a closed and locked position.

2. Ventilators shall be factory fabricated and assembled with screw spline joinery. All ventilator hardware shall be factory prepped and applied. Hardware attached to frame will be field applied. Frame adapters shall be factory fabricated and shipped loose for field installation.

3. Ventilator extrusions, .125 inch primary wall thickness.

4. Ventilator Glazing:

a. Two sided structural using a combination butt glazed spacer tape and structural silicon back bedding. An EPDM exterior wedge glazing gasket shall be utilized at vent head and sill members. Exterior jambs shall be sealed with structural silicon sealant.

b. Ventilator glazing must align in same plane as adjacent fixed glazing to form an uninterrupted monolithic sightline when viewed from exterior.

5. Limit interior ventilator sightline to 1 1/2" at vent jamb stop. Head and sill shall be integral with horizontal members and have no visible sightline.

6. Ventilator hardware:

a. Extruded continuous top hinge integral with ventilator and pressure plate, completely concealed from the exterior.

b. Multiple point locking function with single lever handle operation incorporating concealed corner transmissions, locking elements, and stainless steel keepers.

c. Locking pin design including an adjustable eccentric roller for optimal ventilator tightness.

d. Stainless steel support arms which limit and support the ventilator to an opening of 7 1/2" to 12 1/2" (dependent on height.)

2.03 GLASS AND GLAZING ACCESSORIES

A. Refer to Section 08810.

2.04 SYSTEM FABRICATION

A. Take accurate field measurements to verify required dimensions prior to fabrication.

B. Location of exposed joints are subject to Architect's acceptance.

C. Provide rigid, thermal break isolators to prevent exterior and interior aluminum framing members from being in contact with each other.

D. Fabricate components in accord with approved shop drawings. Remove burrs and ease edges. Shop fabricate to greatest extent practicable to minimize field cutting, splicing, and assembly. Disassemble only to extent necessary for shipping and handling limitations.

E. Steel Components:

1. Clean surfaces after fabrication and immediately prior to application of primer in accord with SSPC-SP2 or SSPC-SP3 at manufacturer's option.

2. Apply specified shop coat primer in accord with manufacturer's instructions to provide 2.0 minimum dry film thickness.

F. Fabricate components true to detail and free from defects impairing appearance, strength or durability. [Fabricate custom extrusions indicated and as necessary for complete installation.]

G. Fabricate components to allow for accurate and rigid fit of joints and corners. Match components carefully ensuring continuity of line and design. Ensure joints and connections will be flush and weathertight. Ensure slip joints make full, tight contact and are weathertight.

H. Reinforce components as required at anchorage and support points, at joints, and at attachment points for interfacing work.

I. Provide structural reinforcing within framing members where required to maintain rigidity and accommodate design loads.

J. System design and sealants to accommodate internal weep and drainage system not visible to the exterior.

K. Head and sill extrusions act as gutter and weep water to exterior; do not penetrate sections with fasteners.

L. Allow for adequate clearance around perimeter of system to enable proper installation and for thermal movement within system.

M. Separate dissimilar metals with protective coating or preformed separators to prevent contact and corrosion.

*************************************************************************************************

Retain paragraph below if solid spandrel and column infill panels are required.

*************************************************************************************************

[N. Provide framing members to rigidly glaze spandrel panels and column covers within framing system.]

[O. Provide special shapes and filler pieces with tight corners.]

*************************************************************************************************

Select and edit following items for appropriate finish; delete inapplicable types. Vistawall is a licensed applicator for all of the coating manufacturers listed below.

*************************************************************************************************

2.05 FINISH

A. Organic Coating (high performance fluorocarbon):

1. Comply with requirements of AAMA 605.2.

2. Surfaces cleaned and given conversion coating pre-treatment prior to application of 0.3 mil dry film thickness of epoxy or acrylic primer following recommendations of finish coat manufacturer.

*************************************************************************************************

Note: A less expensive finish coat containing a minimum of 50% fluorocarbon resin is also available, and meets AAMA 605.2, but with reduced performance over time.

*************************************************************************************************

3. Finish coat of [50%] [70%] minimum fluorocarbon resin fused to primed surfaces at temperature recommended by manufacturer, 1.0 mil minimum dry film thickness.

4. Acceptable coatings are Trinar by Akzo Coatings, Inc.; Nubelar by Glidden Company; Fluoroceram by Morton International, Inc.; Duranar by PPG Industries Inc.; and Fluropon by Valspar Corporation.

5. Provide in either 2, 3, or 4 coat system as required for color selected.

[6. Custom colors as selected by Architect.]

***** OR *****

[7. Manufacturer's standard colors as selected by Architect.]

***** OR *****

 

 

*************************************************************************************************

Vistawall utilizes a computer driven anodizing system which produces the closest color range available.

*************************************************************************************************

[B. Clear Anodized:

1. Conforming to AA-M12C22A31 and AAMA 607.1.

2. Architectural Class II, etched, medium matte, clear anodic coating, 0.4 mil minimum thickness.]

***** OR *****

[C. Color Anodized:

1. Conforming to AA-M12C22A42 or A43 or A44 and AAMA 606.1 and 608.1.

2. Architectural Class [I] [II], etched, medium matte, [black] [dark bronze] [medium bronze] [light bronze] colored anodic coating, [0.7] [0.4] mil minimum thickness.]

 

PART 3 - EXECUTION

 

3.01 EXAMINATION

A. Examine conditions and proceed with Work in accordance with Section 01400.

B. Verify dimensions, tolerances, and method of attachment with other Work.

3.02 INSTALLATION

A. Install in accordance with manufacturer's instructions and applicable provisions of AAMA Aluminum Curtain Wall Design Guide Manual.

B. Align assemblies plumb and level, free of warp or twist, aligning with adjacent Work.

C. Tolerances:

1. Limit variations from plumb and level:

a. 1/8 inch in 20'-0" vertically and horizontally.

b. 1/4 inch in 40'-0" either direction.

2. Limit offsets in theoretical end-to-end and edge-to-edge alignment:

a. 1/16 inch where surfaces are flush or less than 1/2 inch out of flush and separated by not more than 2 inches.

b. 1/8 inch for surfaces separated by more than 2 inches.

3. Step in face: 1/16 inch maximum.

4. Jog in alignment: 1/16 inch maximum.

5. Location: 1/4 inch maximum deviation of any member at any location.

6. Tolerances are not accumulative.

D. Provide attachments and shims to permanently fasten system to building structure.

E. Anchor securely in place, allowing for required movement, including expansion and contraction.

F. Separate dissimilar materials at contract points, including metal in contact with masonry or concrete surfaces, with protective coating or preformed separators to prevent contact and electrolytic action.

G. Set sill members in bed of sealant. Set other members with internal sealants and baffles to provide weathertight construction.

*************************************************************************************************

Retain paragraph below when applicable.

*************************************************************************************************

[H. Do not apply mullion covers until building is closed in, roofing is installed and no alkaline substances can be washed from building onto curtain wall system.]

 

 

*************************************************************************************************

Retain following paragraph when curtain walls are installed adjacent to stone.

*************************************************************************************************

[I. Ensure that deadload from curtain wall system is not transferred to stone veneer.]

J. Glazing:

1. Install glazing gaskets and sealants in accordance with manufacturer's instructions without exception, including surface preparations. Refer to Section 08810 for additional requirements.

K. Fire Safing and Curtain Wall Insulation:

1. Install fire safing and curtain wall insulation specified in Section 07200 and 07270.

*************************************************************************************************

Delete article below if not applicable.

*************************************************************************************************

3.03 FIELD QUALITY CONTROL

*************************************************************************************************

Edit paragraph below to include required field tests; air and water infiltration tests usually not required. Coordinate provisions with referenced section.

*************************************************************************************************

A. Field Tests: Independent testing laboratory will perform [air infiltration,] [water infiltration,] [and] hose test; refer to Section 01411 for requirements.

3.04 CLEANING

A. Clean surfaces in compliance with manufacturer's recommendations; remove excess mastic, mastic smears, and other foreign materials.

B. Clean metal surfaces exercising care to avoid damage.

 

END OF SECTION

??

 

 

 

01 July, 95 GUIDE SPECIFICATION 08925 -11

 



Request for Information / Request a Catalog from The Vistawall Group
 
 
 
To request more information from The Vistawall Group, please complete the form below.
 
*Name:    
*Email:    
Company:    
*Type:    
Phone:    
*Address:    
*Request:    
    (* = Mandatory field) 
Please add me to the mailing list for the free monthly e-Newsletter AECnews.