[NOTE: Instructional and advisory language in grey italic font.]
PART 1 GENERAL  				 

1.01	SUMMARY

A.	Section Includes:
1.	All exterior window wall furnished and installed as shown on drawings, specified in this section, and designated in the AAMA CWM-1 “Curtainwall Manual”
2.	All labor, materials, tools, equipment, and services needed to furnish and install window wall, including sill starters, head and/or jamb receptors and slab edge covers (if indicated on drawings)
3.	Components furnished with installed window wall.
4.	Installation accessories furnished and installed.

1.02	REFERENCES

A.	Refer to AAMA CWM-1 “Curtainwall Manual” for a complete list of references and industry standards.

1.03 SYSTEM DESCRIPTION AND PERFORMANCE REQUIREMENTS

A. 	 Design Wind Loads - Allowable Stress Design (ASD)
1.	The design wind pressure for the project will be:  (Specify)
a.	___ psf positive and negative; ___ psf negative at corner zones
b.	Per wind pressure diagram, (or)
c.	Per local building codes 

[NOTE: Determination of Design Load(s) is the sole responsibility of the building's Engineer of Record, considering Code interpretation issues and/or prescriptive requirements not included in Contract Documents.  EFCO is not responsible for determining Design Loads and strongly recommends that ASD Design Loads (in psf or Pa) specific to all relevant areas of the building be provided by the Specifier.]

2.	All structural components, including transoms, mullions and anchors shall be designed accordingly, complying with deflection and stress requirements of Paragraph 1.03.B.
a.	ASD design wind loads in 1.03.A apply to design and pre-construction performance mockup testing of the overall window wall system employed on the project. Pre-qualification testing requirements for standard glazed window wall framing components of the overall window wall system are specified below. 

(Specifier Note: If project-specific pre-construction performance or visual mockups will be required, clearly define scope, roles, responsibilities, test procedures, performance requirements and acceptable alternatives, if any. Refer to AAMA CWM-1 and AAMA 501 for more information.)

B.	Air, Water and Structural Performance Requirements
1.	When tested in accordance with cited test procedures, window wall shall meet or exceed the following performance criteria, as well as those indicated in the AAMA “Curtainwall Manual”, unless otherwise noted herein.
a.	Minimum two-level test specimen shall be constructed to meet the requirements of AAMA 501 “Methods of Test for Exterior Walls”.
2.	Air Test Performance Requirements
a.	Air infiltration maximum 0.06 cfm per square foot at 6.24 psf pressure differential when tested in accordance with ASTM E283.
3.	Water Penetration Resistance Test Performance Requirements
a.	No uncontrolled water leakage at 15.00 psf static pressure differential, with water application rate of 5 gallons/hr/sq ft when tested in accordance with both ASTM E331.  Static water testing shall be repeated after each type of test preceding the Inelastic Lateral Racking tests and Uniform Load Structural Test at 1.5 times design test pressure.
b.	No uncontrolled water leakage at 15.00 psf dynamic pressure differential, with water application rate of 5 gallons/hr/sqft when tested in accordance with AAMA 501.1.  Dynamic water testing shall be repeated prior to the Inelastic Lateral Racking tests and Uniform Load Structural Test at 1.5 times design test pressure.
4.	Structural Test Performance Requirements (at Design Test Pressure)
a.	Uniform Load Deflection Test
i.	No deflection of any unsupported span L of test specimen (framing rails, transoms, mullions, etc.) in excess of L/175 at both a positive and negative load of 40 psf (design test pressure) when tested in accordance with ASTM E330 (maximum L/240 + 1/4" at spans over 13' - 6"; 2L/175 at unsupported cantilevers).
5.	Vertical Inter-Story Movement:  
a.	No air leakage or water penetration in excess of primary performance requirements, no breakage, no damage, or disengagement resulting from vertical displacement of the intermediate level support in the plane of the main wall 3/4” up and down three complete cycles. 
6.	Elastic Lateral Racking – Parallel to Wall:  
a.	No air leakage or water penetration in excess of primary performance requirements, no breakage, no damage, or disengagement resulting from lateral displacement of the intermediate level support in the plane of the main wall at +/-0.5% of story height for three complete cycles in accordance with AAMA 501.4
7.	Thermal Cycling:  
a.	No air leakage or water penetration in excess of primary performance requirements, no breakage, no damage, or disengagement resulting from three thermal cycles of -20˚F exterior ambient temperature to +180˚F exterior surface temperature, each held for a two-hour period after equilibrium has been reached.  
i.	Interior ambient air temperature controlled at 70˚F +/-5˚F during cold and hot cycles  
ii.	Test in accordance with AAMA 501.5 unless noted otherwise herein  

[NOTE: Surface temperatures are measured during the cold cycle for information only.  Conclusions regarding condensation performance of glass or framing should be drawn only from guarded hot box testing, or finite element thermal models as specified below.]

8.	Structural Test Performance Requirements (at 1.5 times Design Test Pressure)
a.	Uniform Load Structural Test
i.	Specimen to be tested at 1.5 times design test pressure, both positive and negative, acting normal to plane of wall in accordance with ASTM E330.
ii.	No glass breakage; permanent damage to fasteners, hardware parts, or anchors; damage to make window wall insert vents inoperable; or permanent deformation of any main frame member in excess of 0.2% of its clear span.
9.	Inelastic Lateral Racking – Parallel to Wall: 
a.	No glass breakage, framing member or trim disengagement, catastrophic failure or “fall-out” resulting from lateral displacement of the intermediate level support perpendicular to the plane of the main wall at +/-1.5% of story height for three complete cycles in accordance with AAMA 501.4.

C.	Condensation Resistance and Thermal Transmittance Performance Requirements 

(EFCO recommends specifying U-Factor and SHGC requirements by citing the values used in the default, prescriptive or performance compliance path option employed during permitting. Coordinate with 08 80 00 Glazing.)

1.	Perform thermal tests in accordance with NFRC and/or AAMA test methods, or provide finite element computer thermal modeling and calculations per NFRC, AAMA and/or manufacturer’s proprietary software as deemed acceptable by the design team. To help ensure proper interpretation, all representations of thermal and solar-optical performance shall be qualified explicitly for the glass type, size, configuration, installation accessories and substrate conditions used in their determination.

a.	Thermal Transmittance (U-Factor) for the overall window area shall be less than or equal to _____ BTU/hr-ft2-F.

b.	Solar Heat Gain Coefficient (SHGC) for the overall window area shall not exceed ____. 

c.	Condensation Resistance Factor (CRF) requirements:  CRF minimum ___ (Frame) and CRF minimum ___ (Glass). 

(Visit www.fgiaonline.org to access the AAMA online CRF Selection Tool. CRF varies with configuration, frame depth, and glass type. Refer to AAMA 515 for recommendations on condensation resistance specifications for critical applications such as hospitals.)

[DISCLAIMER:  Condensation on interior surfaces of installed windows may be affected by many variables, including, but not limited to, component thermal performance, thermal mass of surrounding materials, interior trim coverage and air flow conditions, weather and mechanical system design.  Since many of these variables are outside of our control, EFCO makes no representations or warranties against the formation of condensation. Testing is conducted on pre-defined configurations under controlled and steady-state laboratory conditions, as specified above.]

E.	Acoustic Performance Requirements
1.	Perform acoustical tests in accordance with ASTM E90 and ASTM E1425 on the glass type(s) specified in 08 80 00, rigidly supported in aluminum framing of the same product type.
2.	“Glass-only” test results shall not be acceptable.
3.	Sound Transmission Class (STC) shall not be less than ___. (Specify STC 31 for 1” insulating glass with makeup of ¼” glass – ½” air space – ¼” glass. Coordinate with 08 80 00 Glazing.)
4.	Outdoor-Indoor Transmission Class (OITC) shall not be less than  ____. (Specify OITC 25 for 1” insulating glass with makeup of ¼” glass – ½” air space – ¼” glass. Coordinate with 08 80 00 Glazing.)

F. Sustainable Design Requirements

1.	The products provided under this section may affect LEED® certification for the project.  Provide available documentation relevant to the project in accordance with USGBC’s “LEED® v4 for Building Design and Construction,” verifying that the components, processes and/or assemblies specified herein conform to the following requirements.  (Select only those Credits needed for the level of certification sought. Modify criteria as necessary for other LEED® programs or versions applicable to specific projects.)
i.	Energy and Atmosphere (EA): EA Prerequisite “Minimum Energy Performance,” and EA Credit “Optimize Energy Performance” 
(1)	Area-weighted overall U-Factor not to exceed that specified in 1.03.D.
(2)	Area-weighted center-of-glass or overall SHGC less than or equal to that specified in 1.03.D.
ii.	Material and Resources (MR): MR Credit “Building Product Disclosure and Optimization – Environmental Product Declarations, Option 1. Environmental Product Declaration (EPD)”
(1)	Provide all relevant component suppliers’ industry-wide or product-specific EPDs as available.
iii.	Material and Resources (MR): MR Credit “Building Product Disclosure and Optimization – Sourcing of Raw Materials, Option 2 “Leadership Extraction Practices - Recycled Content.” 
(1)	Provide window wall aluminum framing containing no less than ___% (Specify up to 15%) combined recycled content by assembly weight. 
(2)	Combined content to be calculated as post-consumer plus one-half pre-consumer recycled content by weight.
(3)	Report pre- and post-consumer recycled content separately.
(4)	All recycled secondary aluminum billet must meet Aluminum Association content requirements for the alloy used.

[NOTE: Secondary aluminum billet contains a high percentage of pre-consumer recycled content, however, glass comprises the majority of the weight of a glazed window assembly.]
 
b.	Material and Resources (MR): MR Credit “Building Product Disclosure and Optimization – Material Ingredients.”
i.	Provide all relevant component suppliers’ disclosures, including manufacturers’ inventory of commonly used materials and ingredients where available.
c.	EQ Low-Emitting Materials – Adhesives and Sealants
i.	All interior primers, structural glazing adhesives and metal-to-metal sealants used on site must meet applicable South Coast Air Quality Management District (SCAQMD) Rule #1168 VOC limits.
d.	EQ Thermal Comfort- Design
i.	Provide thermal barrier framing and glazing as specified herein and in 08 80 00 Glass and Glazing.
e.	EQ Daylight and Views
i.	Area-weighted overall VT not less than 0.____ (Specify – Coordinate with 08 80 00 Glazing) per NFRC 200.
ii.	Window sizes and configurations as shown on drawings.

1.04	SUBMITTALS

A.	General Requirements
1.	Provide all submittals in a timely manner to meet the required construction completion schedule.

B.	Shop Drawings
1.	Shop drawings must be prepared wholly by the window wall manufacturer, or a qualified engineering services firm under the guidance of the manufacturer.  Shop drawings for pre-engineered configurations may be prepared by installers upon written manufacturer consent.
2.	Provide design details along with bid proposals to define system aesthetic and functional characteristics.
3.	Provide up to three photocopied sets of shop drawings, including half size details of all necessary conditions.

C.	Samples
1.	Components:  Submit samples of anchors, fasteners, hardware, assembled corner sections and other materials and components as requested by Architect.
2.	Finish:  Submit color samples for Architect's approval as requested.

D.	Test Reports and Calculations
1.	Submit certified independent laboratory test reports verifying compliance with all test requirements of 1.03.
2.	Submit structural calculations indicating adequacy of all materials furnished under this section, in meeting the uniform and structural load requirements as specified in 1.03A.

1.05	QUALITY ASSURANCE

A.	Qualifications:  Upon request, the window wall manufacturer shall provide written consent for the installation subcontractor to install window products to be used on this project.

1.06	DELIVERY, STORAGE AND HANDLING 

A.	Packing, Shipping, Handling and Unloading
1.	Materials will be packed, loaded, shipped, unloaded, stored and protected in accordance with AAMA CW-10.

1.07	WARRANTY 

A.	Aluminum Window Wall Installation
1.	The responsible contractor shall assume full responsibility and warrant for one year the satisfactory performance of the total window wall installation which includes that of the window wall, glass (including insulated units), glazing, anchorage and setting system, sealing, flashing, etc., as it relates to air, water, and structural adequacy as called for in the specifications and approved shop drawings.
2.	Any deficiencies due to such elements not meeting the specifications shall be corrected by the responsible contractor at their expense during the warranty period.

NOTE: Standard warranty period is 5 years or extended 10 years.

B.	Window Wall Material and Workmanship
1.	Provide written guarantee against defects in material and workmanship for ___ years from the date of final shipment.

C.	Glass
1.	Provide a written warranty for insulated glass units that they will be free from obstruction of vision as a result of dust or film formation on the internal glass surfaces caused by failure of the hermetic seal due to defects in material and workmanship.
2.	Warranty period shall be for 10 (ten) years.

D.	Finish

NOTE: Select for Anodic Finish:  Standard warranty period is 3 years or extended 5 years or 10 years.

1.	Warranty period shall be for ___ years from the date of final shipment.

2.	OR

NOTE: Select for Organic Finish:  Standard warranty period is 5 years or extended 10 years or 15 years or 20 years.

2.	Warranty period shall be for ___ years from the date of final shipment.
3.	Provide organic finish warranty based on AAMA standard 2605.

PART 2 PRODUCTS

2.01 MANUFACTURERS

A.	Acceptable Manufacturer
1.	Drawings and specification are based on:
a.	EFCO – 645X Series Thermal Window Wall.
b.	Base bid will be EFCO.
2.	Substitutions
a.	Other manufacturers’ products that meet or exceed specified design requirements may be considered.  Submit the following information with request for substitutions at least ten (10) working days prior to bid date.
i.	Test reports specified in 1.03.
ii.	Full proposal details and samples specified in 1.04.
iii.	Copy of manufacturer's warranty specified in 1.07.
iv.	Proof of at least 10 years’ experience in the design and fabrication of window wall.
v.	Other information as requested for evaluation
3.	Substitute products not pre-approved by the Architect via addenda will not be considered.

2.02 MATERIALS

A.	Aluminum Framing Members
1.	Extruded aluminum billet, 6063-T6 alloy for primary non-radius components; 6063-T6 or 6061-T6 for anchor components; all meeting the requirements of ASTM B221.
2.	Aluminum sheet alloy 5005-H32 (for anodic finishing), or alloy 3003-H14 (for painted or unfinished sheet) meeting the requirements of ASTM B209.
3.	Principal extruded framing members will be a minimum 0.100" in thickness.
4.	Extruded or formed trim components will be a minimum 0.060" in thickness.
5.	System depth at vertical mullions 5 ½” with standard 1” insulating glass units (IGUs)
6.	Interior face dimension 2 ¼” at vertical mullions; 2 ½” at corner mullions.
7.	Vertical mullions and horizontal intermediate framing to be structural glazed.

2.03 COMPONENTS

A.	Sealants
1.	All sealants shall comply with applicable provisions of AAMA 800 and/or Federal Specifications FS-TT-001 and 002 Series.
2.	Frame joinery sealants shall be suitable for application specified and as tested and approved by window wall manufacturer.

B.	Glass
1.	Provide in accordance with Section 08 80 00.
2.	Sealed insulating glass shall be tested and certified in accordance with ASTM E2190.

C.	Glazing 
1.	Provide in general accordance with Section 08 80 00.
2.	Glazing method shall be in general accordance with the GANA Glazing Manual for specified glass type, or as approved by the glass fabricator.

D.	Glazing Materials
1.	Setting Blocks/Edge Blocking:  Provide in sizes and locations recommended by GANA Glazing Manual. Setting blocks used in conjunction with soft-coat low-e glass shall be silicone.
2.	Back-bedding tapes, expanded cellular glazing tapes, toe beads, heel beads and cap beads shall meet the requirements of applicable specifications cited in AAMA 800.
3.	Glazing gaskets shall be weather-resistant and compatible with all materials in contact. 
4.	Structural silicone sealant where used shall meet the requirements of ASTM C1184.
5.	All materials in continuous contact with structural silicone shall be tested for compatibility and approved by the sealant manufacturer for the intended application.  
6.	Gaskets in continuous contact with structural silicone shall be extruded silicone or compatible material.

E.	Starters and Receptors
1.	Provide extruded thermal barrier aluminum sill starters to receive glazed window wall frames, as shown on architectural drawings. Sill starters shall be [Select one] [captured “can” profile] [structural silicone glazed (SSG) “flush” profile].
a.	Sill starter shall incorporate a primary seal inboard of the glazing pocket, with one row of extruded multi-fin weather-strip at interlocking horizontal SSG frame members, and/or an interior compression wedge and cap seal at the interior frame face, providing a nominal pressure equalization seal.
b.	Maintain compression using a rigid PVC bearing rod, wedge or other suitable means. 
c.	Provide field-applied silicone splices, as well as factory-sealed end caps or silicone end dams at the installer’s option.
2.	(Optional) Provide extruded thermal barrier aluminum head receptors to receive glazed window wall frames, as shown on architectural drawings. Head starters shall be captured “can” profile.
a.	Useable vertical depth of head receptors shall accommodate total vertical movement of ___ inches (Specify up to 3/4”) including live load, column creep/foreshortening, thermal movement and applicable tolerances.
b.	Head receptor shall incorporate an interior drive-on compression bar and bulb weatherstrip at the interior frame face, providing a nominal pressure equalization seal.
c.	Maintain compression using a rigid PVC bearing rod, drive-in compression bar or other suitable means. 
d.	Seal all head receptor joinery per manufacturer’s recommendations.
3.	(Optional) Provide extruded thermal barrier aluminum jamb receptors to receive glazed window wall frames, as shown on architectural drawings Jamb starters shall be SSG “flush” profile.
a.	Seal all jamb receptor joinery and splices per manufacturer’s recommendations.
4.	Provide wind load clips at vertical mullions as required to transfer structural reactions to anchors.
5.	Coordinate anchorage and installation “means and methods” with the General Contractor and the work of other trades.
a.	Provide for ___ inch (Specify up to 1”) locational tolerance of substrate materials in three orthogonal directions. 
b.	Refer to structural drawings for graphical depiction of allowable anchor zones in edge-of-slab areas.
6.	Provide continuous perimeter sealant joints at starters as indicated on drawings and specified in Section 07 92 13.
7.	Finish exposed surfaces of starters and receptors to match window frames.

F.	Floor Slab Edge Covers (Optional)
1.	Provide extruded or brake-formed aluminum slab covers as shown on architectural drawings.
a.	Extruded slab covers to be engaged in continuous extruded tracks.
b.	Mechanically attach top of brake-formed slab covers to sill starters or horizontal framing members. Bottom of brake-formed slab covers to be hook-engaged into head receptors below, with allowance for nominal installation tolerances.
c.	Provide gaskets or sealants as necessary for damping.
2.	Coordinate insulation, waterproofing and/or membrane interface beneath slab covers with the General Contractor and the work of other trades. 
3.	Finish exposed surfaces of slab covers as indicated on drawings. 
a.	Extruded aluminum components to be finished prior to fabrication. 
b.	Brake-formed aluminum components to be finished after forming. 

G.	Steel Components
1.	Provide steel reinforcements as necessary to meet the performance requirements of 1.03.
2.	Concealed steel anchors and reinforcing shall be factory painted after fabrication with TGIC powder coating, or rust-inhibitive primer complying with Federal Specification TT-P-645B.

H.	Window Wall Insert Vents: (Optional)
1.	Provide “zero sightline” project-out and/or outswing casement window wall insert vents complying with the requirements of Section 08 51 13, at the locations indicated on architectural drawings.

2.04 FABRICATION

A.	General:
1.	Finish, fabricate and factory-glaze window wall under the responsibility of one manufacturer, with units sized for ease of shipping, distribution and erection.
a.	“Stick” systems using individual field-fabricated or field-assembled members are not acceptable.
2.	Framing to be designed for glazing and re-glazing from the exterior.
3.	Provide interlocking male/female type vertical mullion "stack" joints at adjacent grid frame members with sharp, well-defined corners and flush sightlines.
4.	Conceal fasteners at vertical to horizontal main framing connections and at miscellaneous trim except as shown on architectural drawings or otherwise required.
5.	Fabricate to allow for thermal movement of materials when subjected to a temperature differential from –10F exterior ambient temperature to +180F exterior surface temperature without damage.
6.	System to be nominally pressure-equalized at the interior plane of the glazing pocket or the interior frame face.

B.	Glass Drainage: 
1.	Provide weep holes and/or drainage slots within glazing pockets to drain any condensation or accumulating water to exterior.

C.	Thermal Break Construction:
1.	Continuous extruded 6/6 polyamide nylon with 25% glass fiber reinforcing, mechanically crimped into cross-knurled cavities. 
2.	Minimum thermal barrier width 18.0 mm.
3.	Quality assurance records must be maintained and available as requested.

D.	Weather-stripping:
1.	Dual-durometer PVC, polypropylene, TPE, EPDM, neoprene, silicone, or other suitable material as tested and approved by the window wall manufacturer. 
2.	Weather-stripping installed in integral dovetail races in framing members.
3.	One row of fin-type weather-strip at interior leg of interlocking vertical mullion members to provide isolation for horizontal movement
4.	Two rows of extruded bulb weather-strip at the interior plane of the glazing pocket in interlocking vertical mullions

2.05 FINISHES

A.	Finish of Aluminum Components
1.	Finish of all exposed areas of aluminum windows and components shall be done in accordance with the appropriate AAMA Voluntary Guide Specification shown (Select from below).

Designation	Description	Standard	Color	
AA-M10-C21-A41
Anodic	Clear Class I -
Eco-friendly etch	AAMA 611	Clear	
AA-M10-C21-A44
Anodic	Electrolytically deposited Class I -
Eco-friendly etch	AAMA 611	Champagne, Light Bronze, Medium Bronze, Dark Bronze,  Black,	
				
Exterior Interior Organic Paint	70% PVDF -
Suitable for INTERIOR or EXTERIOR finishes	AAMA 2605	As selected by Architect	

[NOTE: For detailed specifications of other surface treatments and finishes available, as well as sustainable finishing process specification upgrades contact EFCO. Color selection is recommended, for the most competitive bids.]

PART 3 EXECUTION

3.01 EXAMINATION

A.	Site Verification of Conditions
1.	Verify that building substrates permit installation of window wall according to the manufacturer's instructions, approved shop drawings, calculations, and contract documents.
2.	Do not install window wall until unsatisfactory conditions are corrected.

3.02 INSTALLATION

A.	Erection of Aluminum Windows
1.	Install all window wall with skilled workers in accordance with approved shop drawings, installation instructions, specifications, and the AAMA CWM-1 “Curtainwall Manual”.
2.	Window wall must be installed, and remain, plumb, square, and level for proper weathering and operation.
3.	Aluminum that is not organically coated shall be insulated from direct contact with steel, masonry, concrete or other dissimilar metals by bituminous paint, rust-inhibiting primer, non-conductive shims or other suitable insulating material.

[DISCLAIMER:  EFCO takes no responsibility for product selection or application, including, but not limited to, compliance with building codes, safety codes, laws, merchantability, or fitness for a particular purpose; and further disclaims all liability for the use, in whole or in part, of these Guide Specifications in preparation of project specifications and/or other documents.  Guide Specifications are subject to change at any time, without notice, and at EFCO’s sole discretion.] 

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