SECTION 08 44 13 GLAZED ALUMINUM CURTAIN WALL

PART 1 GENERAL

1.01	Work Included

A.	Furnish and install architectural aluminum curtain wall complete with related components as shown on drawings and specified in this section.

B.	Curtain Wall System shall be EFCO® Series 5500 Outside Glazed. Other manufacturers requesting approval to bid their product as an equal must submit the following information fifteen days prior to close of bidding.
1.	A proposal drawing showing full size details of all curtain wall components including all anchors and building attachments.
2.	Test reports documenting compliance with requirements of Section 1.05.

C.	Glass
1.	Reference Section 08 81 00 for Glass and Glazing.

D.	Single Source Requirement
1.	All products listed in Section 1.02 shall be by the same manufacturer.

List work and materials related to this section but specified in other sections. EFCO recommends that one manufacturer furnish all applicable Division 8 products to ensure consistent product quality and compatibility.

1.02	Related Work

A.	Section 08 32 13 – Sliding Aluminum – Framed Glass Doors
B.	Section 08 41 13 – Aluminum – Framed Entrances and Storefronts
C.	Section 08 44 33 – Sloped Glazing Assemblies
D.	Section 08 51 13 – Aluminum Windows
E.	Section 10 71 13 – Exterior Sun Control Devices

1.03	Items Furnished but Not Installed

1.04	Items Installed but Not Furnished

1.05	Laboratory Testing and Performance Requirements

A.	Test Units
1.	Air, water, and structural test unit size shall be a minimum of two stories high and three lites wide.
2.	Thermal test unit sizes shall be 80" (2032 mm) wide x 80" (2032 mm) high with one intermediate vertical mullion and two lites of glass.

B.	Test Procedures and Performance
1.	Air Infiltration Test
a.	Test unit in accordance with ASTM E 283 at a static air pressure difference of 6.24 psf (300 Pa).
b.	Air infiltration shall not exceed .06 cfm/SF (0.31 l/s•m²) of unit.
2.	Water Resistance Test
a.	Test unit in accordance with ASTM E 331.
b.	The test for static water penetration (ASTM E 331) shall be conducted at an air pressure difference of 15.0 psf (720 Pa). There shall be no water leakage as defined by AAMA 501.1, paragraph 5.5.
3.	Uniform Load Deflection Test
a.	Test in accordance with ASTM E 330.
b.	Deflection under design load shall not exceed L/175 for spans less than 162" (4114 mm).
c.	Deflection under design load shall not exceed L/240 +1/4” (6 mm) for spans greater than 162" (4114 mm).
4.	Uniform Load Structural Test
a.	Test in accordance with ASTM E 330 at a pressure 1.5 times the design wind pressure in 1.05.B.3.b.
b.	At conclusion of the test there shall be no glass breakage, permanent damage to fasteners, curtain wall parts, or any other damage that would cause the curtain wall to be defective.
5.	Condensation Resistance Test (CRF)
a.	Test unit in accordance with AAMA 1503.1.
b.	Condensation Resistance Factor (CRF) shall not be less than ___ (frame) when glazed with ___ center of glass U-Factor. (See chart at end of section).
6.	Condensation Resistance (CR)
a.	With ventilators closed and locked, test unit in accordance with NFRC 500-2010.
b.	Condensation Resistance (CR) shall not be less than ___ when glazed with ___ center of glass U-Factor. (See chart at end of section).
7.	Thermal Transmittance Test (Conductive U-Factor)
a.	With ventilators closed and locked, test unit in accordance with NFRC 100-2010.
b.	Conductive thermal transmittance (U-Factor) shall not be more than ___ BTU/hr•ft2•°F
( ___ W/m²•K) when glazed with ___ center of glass U-Factor. (See chart at end of section).
8.	Seismic Performance
a.	Test unit in accordance to AAMA 501.4 system to meet design displacement of 0.010 x the greater adjacent story height and ultimate displacement of 1.5 x the design displacement.
9.	Sound Transmission Loss
a.	Test unit in accordance with ASTM E 90-02.
b.	Sound Transmission Class (STC) shall not be less than 30.

Glass Comparison Chart	
Glass	C.O.G.2
U-Factor	U-Factor1	Frame
CRF3	CR1	
1” IG	0.48	0.51 BTU/hr•ft²•ºF
(2.90 W/m²•K)	77	*	
1” IG	0.30	0.35 BTU/hr•ft²•ºF
(1.99 W/m²•K)	77	56	
1” IG	0.24	0.30 BTU/hr•ft²•ºF
(1.70W/m²•K)	77	60	
1” IG	0.20	0.27 BTU/hr•ft²•ºF
(1.53 W/m²•K)	77	63	

1U-Factor are based on a nominal size of 47.25" (1200 mm) x 59" (1500 mm) with two lites of glass using NFRC-100, and 500 - 2010.  2Intercept® Spacer.  3Based on AAMA 1503.1

C.	Project Wind Loads

Architect to specify design wind pressure, both positive and negative required by the governing building code, as calculated from ASCE 7, or as determined by boundary layer wind tunnel testing. Use 20.0 psf (960 Pa) as a minimum.
1.	The system shall be designed to withstand the following loads normal to the plane of the wall:
a.	Positive pressure of   ___ psf ( ___ Pa) at non-corner zones.
b.	Negative pressure of ___ psf ( ___ Pa) at non-corner zones.
c.	Negative pressure of ___ psf ( ___ Pa) at corner zones.

1.06	Field Testing and Performance Requirements

Insert at discretion of specifier.

Architect should insert an exact description of the area(s) to be field tested. Failure to do so can dramatically affect the cost of the testing. The recommended procedure for identification of the test area is to reference an architectural elevation/plan drawing that clearly shows the intent of the area to be field tested.
A.	Test Units
	
1.	Air, water, and structural test unit size shall be a representative sample of typical construction and shall have no outstanding punch list or other visible defects. If no test area and/or location have been identified, the persons doing the test shall select an area. This area shall be selected to provide representative performance data, usually a minimum of 100 ft2. The area to be tested shall include perimeter caulking, typical splices, frame intersections, and, if applicable, at least 2 entire vision lites and 2 entire spandrel lites containing an intermediate horizontal member. All operable components within the test area shall be isolated and exempt from the test procedure.

B.	Test Procedures and Performance
1.	Air Infiltration Test
a.	Test unit in accordance with AAMA 503-03 for field testing. The unit test shall be conducted at a minimum uniform static test pressure differential of at least 1.57 psf 
(75 Pa), but at a pressure differential not to exceed 6.24 psf (300 Pa).
b.	The maximum allowable rates of air leakage for field testing shall not exceed 1.5 times the project specification rate or .09 cfm/SF (.45 l/s•m²), whichever is greater.
2.	Water Resistance Test
a.	Test unit in accordance with AAMA 503-03. 
b.	The field water penetration resistance tests shall be conducted at a static test pressure of two-thirds of the specified project water penetration test pressure, but not less than 
6.24 psf (300 Pa).

1.07	Quality Assurance

A.	Provide test reports from AAMA accredited laboratories certifying the performance as specified in 1.05.

B.	Test reports shall be accompanied by the curtain wall manufacturer’s letter of certification stating that the tested curtain wall meets or exceeds the referenced criteria for the appropriate curtain wall type.

1.08	References

1.09	Submittals

A.	Contractor shall submit shop drawings; finish samples, test reports, and warranties.
1.	Samples of materials as may be requested without cost to owner, i.e., metal, glass, fasteners, anchors, frame sections, mullion section, corner section, etc.

B.	An NFRC Component Modeling Approach (CMA) generated label certificate shall be provided by the manufacturer. The label certificate shall be project specific and will contain the thermal performance ratings of the manufacturer’s framing combined with the specified glass, and the glass spacer used in the fabrication of the glass, at NFRC standard test size as defined in table 4-3 in NFRC 100-2010.

1.10	Warranties

A.	Total Curtain Wall Installation
1.	The responsible contractor shall assume full responsibility and warrant for one year the satisfactory performance of the total curtain wall installation. This includes the glass (including insulated units), glazing, anchorage and setting system, sealing, flashing, etc. as it relates to air, water, and structural adequacy and 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.

Standard warranty period is 3 years, or extended 10 years.
B.	Window 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 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.
1.	Warranty period shall be for 10 (ten) years. 

D.	Finish
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.

	OR

Select for Organic Finish:  Standard warranty period is 5 years, or extended 10 years, or 15 years, or 20 years.
1.	Warranty period shall be for ___ years from the date of final shipment.
2.	Provide organic finish warranty based on AAMA standard 2605.

PART 2 PRODUCTS

2.01	Materials

A.	Aluminum
1.	Extruded aluminum shall be 6063-T6 alloy and temper.

A complete glass description is required for the manufacturer to supply appropriate glazing gaskets even if glass and glazing is by others.  Follow local building codes regarding tempered glass.

B.	Glass
1.	Ship open for 1” Insulated glass with a center of glass U-Factor of ___ constructed as follows:
a.	Exterior lite - ___ thick, ___ color, ___ glass (annealed, H.S. Temp), 
with a surface coating of ___ on the number ___ (1 or 2) surface.
b.	Air space of ___ inch (or argon filled).
c.	Interior lite - ___ thick, ___ color, ___ glass (annealed, H.S. Temp), 
with a surface coating of ___ on the number ___ (3 or 4) surface.

		OR
1.	Ship open for monolithic glass by others
a.	Exterior lite - ___ thick, ___ color, ___ glass (annealed, H.S. Temp), 
with a surface coating of ___ on the number ___ (1 or 2) surface.

C.	Anchors
1.	Perimeter and floor line anchors shall be aluminum or steel. All steel anchors shall be properly insulated from the aluminum.

D.	Thermal Barrier
1.	All exterior aluminum shall be separated from interior aluminum by a rigid, structural thermal barrier.  For purposes of this specification, a structural thermal barrier is defined as a system that shall transfer shear during bending and, therefore, promote composite action between the exterior and interior extrusions.
2.	The thermal barrier shall be thermal struts, consisting of glass reinforced polyamide nylon, mechanically crimped in raceways extruded in the exterior and interior extrusions.
3.	Poured and debridged urethane thermal barriers shall not be permitted.

2.02	Fabrication

A.	General
1.	All aluminum vertical and horizontal extrusions shall have a minimum wall thickness of .093"
(2.3 mm) to .125" (3 mm).

B.	Frame
1.	Frame components shall be screw spline construction.
2.	Curtain wall system is able to accommodate separate interior and exterior finishes and colors.

C.	Glazing
1.	Outside glazed curtain wall system shall be dry glazed with an exterior aluminum pressure plate and snap cover with interior and exterior dense EPDM preset gaskets.

Series 5500 curtain walls have dual finish capability. The specifier can choose separate finish types and colors for interior and exterior.

2.03.1	Finishes

Geographic Location and Color Selection determine Chemistry Formulation. Not all Colors are available in every Chemistry. Please consult with manufacturer prior to specification to ensure efficacy of proposed finish.

1.	Anodic 
a. 	Finish all exposed areas of aluminum windows and components with electrolytically-  deposited color in accordance with Aluminum Association Designation.

2.   Organic 
a.	Liquid Fluoropolymer Aluminum Extrusion Coatings, AAMA 2605-20:  Minimum 70 percent PVDF resin by weight, in color coat [and clear topcoat, if required]. Color as selected from one of the following:
I.	EFCO Ultrapon Color Card
II.	Sherwin-Williams Coil Coatings Fluropon Color Card – [Fluropon] [Fluropon Classic] [Fluropon Classic II] [Fluropon Premiere] 
III.	Sherwin-Williams Coil Coatings Metal Trends Color Card - Sherwin-Williams Coil Coatings Fluropon Color Card – [Fluropon] [Fluropon Classic] [Fluropon Classic II] [Fluropon Premiere] 

PART 3 EXECUTION

3.01	Inspection

A..	Job Conditions
1.	All openings shall be prepared by others to the proper size and shall be plumb, level, and in the proper location and alignment as shown on the architect's drawings.
Insert at discretion of specifier  
2.	Provide for manufacturer representation to conduct pre-installation site meeting.

3.02	Installation

A.	Use only skilled tradesmen with work done in accordance with approved shop drawings and established specifications, and erect all curtain wall components to all building bench marks and column center lines.

B.	Plumb and align curtain wall faces in a single plane for each wall plane, and erect curtain wall materials square and true. Adequately anchor to maintain positions permanently when subjected to normal thermal movement, building movement, and specified wind loads.

C.	Adjust windows in curtain wall for proper operation after installation.

D.	Furnish and apply sealants to provide a weather tight installation at all joints and intersections and at opening perimeters. Wipe off excess material, leave all exposed surfaces and joints clean and smooth.

3.03	Anchorage

A.	Adequately anchor to maintain positions permanently when subjected to normal thermal movement, specified building movement, and specified wind loads.

3.04	Protection and Cleaning

A.	The general contractor shall protect the aluminum materials and finish against damage from construction activities and harmful substances. The general contractor shall remove any protective coatings as directed by the architect, and shall clean the aluminum surfaces as recommended for the type of finish applied.
B.	A bi-annual sweetwater rinse is recommended to prohibit dirt, dust, and debris from accumulation on the surface of the coating and to help maintain the aesthetic of the coating.

EFCO is a registered trademark of EFCO Corporation. Ultrapon is a trademark of EFCO Corporation.