SECTION 08911 CURTAIN WALL SYSTEM
                                           
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.

	B.	Section Includes:
		1.	Aluminum curtain wall systems complete with reinforcing, shims, anchors, 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.

	D.	Related Sections:
		1.	Section 055000 - Metal Fabrications.
		2.	Section 061000 ‑ Rough Carpentry.
		3.	Section 084113 ‑ Aluminum Entrances and Storefronts.
		4.	Section 085113 ‑ Aluminum Windows.
		5.	Section 088000 - Glass and Glazing.
		
1.02	REFERENCES

A.	Miami-Dade County Protocol PA-201, PA-202, and PA-203
1.	Approval Pending (HR-250 IMPACT WALL)

	B.	Aluminum Association (AA):
		1.	DAF-45	 	Designation System for Aluminum Finishes.
	
	C.	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.	2605			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 Weather-stripping.
		8.	Manual #10		Care and Handling of Architectural Aluminum From Shop to Site.
	D.	American National Standards Institute (ANSI):
		1.	Z97.1			Specifications and Methods of Test for Safety Glazing Material Used in Buildings.
	E.	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.	C716			Installing Lock-Strip Gaskets and Infill Glazing Materials.
		9.	C920			Elastomeric Joint Sealants.
		10.	E283			Rate of Air Leakage Through Exterior Windows, Curtain Walls, and Doors.
		11.	E330	 		Structural Performance of Exterior Windows, Curtain Walls, and Doors by Uniform Static Air Pressure Difference.
		12.	E331	 		Test Method for Water Penetration of Exterior Windows, Curtain Walls, and Doors by Uniform Static Air Pressure Difference.
		13.	E773			Test Method for Seal Durability of Sealed Insulating Glass Units.
		14.	E774			Sealed Insulating Glass Units.
	
	F.	Consumer Product Safety Commission (CPSC):
		1.	16 CFR 1201		Safety Standard for Architectural Glazing Materials.
	
	G.	Federal Specifications (FS):
		1.	TT-P-645A		Primer, Paint, Zinc Chromate, Alkyd Type.
	
	H.	Flat Glass Marketing Association (FGMA):
		1.				Glazing Manual.
	
	I.	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).

1.03	SYSTEM REQUIREMENTS

	A.	General Standard:  In addition to requirements shown or specified, comply with applicable provisions of Florida Building Code HVHZ, TAS-201, TAS-202, TAS-203, ASTM 1996 and 1886 and the Aluminum Curtain Wall Design Guide Manual for design, materials, fabrication and installation of component parts.
	
	B.	Design Requirements: Based on specific project design load requirements.
		1.	System manufacturer shall provide low profile entrance frames as an integral part of the curtain wall system.
		2.	System manufacturer shall provide curtain wall systems, including necessary modifications to meet specified requirements and maintaining visual design concepts.
		3.	Perimeter conditions shall allow for installation tolerances, expansion and contraction of adjacent materials, and sealant manufacturer's recommended joint design.
		4.	Drawings are diagrammatic and do not purport to identify nor solve problems of thermal or structural movement, glazing, anchorage or moisture disposal.
		5.	Requirements shown by details are intended to establish basic dimension of unit, sight lines and profiles of members.
		6.	Do not assume glass, sealants, and interior finishes contribute to framing member strength, stiffness, or lateral stability.
		7.	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.
		8.	Anchors, fasteners and braces shall be structurally stressed not more than 50% of allowable stress when maximum loads are applied.
		9.	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.
		10.	Provide concealed fastening.
		11.	Metal faces are required to be visually flat under all lighting conditions, subject to acceptance of Architect.
		12.	Use rigid isolators to maintain flatness of face cap.
		13.	Provide uniform color and profile appearance at components exposed to view.
		14.	Provide pre-punched pressure plates to ensure correct quantity and spacing of fasteners.

	C.	Performance Requirements:
		1.	Air infiltration:  Air leakage through fixed light areas of storefront shall not exceed 0.02 cfm per square foot of surface area when tested in accordance with Florida Building Code HVHZ (TAS-202) and ASTM E283 at differential static pressure of 6.24 psf.
		2.	Water infiltration:  No uncontrolled leakage when tested in accordance with Florida Building Code HVHZ (TAS-202) and ASTM E 331 at test pressure of 20 psf.

	D.	Thermal Requirements:
		1.	Framing systems shall accommodate expansion and contraction movement due to surface temperature differentials of 180F without causing buckling, stress on glass, failure of joint seals, excessive stress on structural elements, reduction of performance, or other detrimental effects.
2.	Ensure doors function normally within limits of specified temperature range.

	E.	Hurricane Resistance Requirements
Large Missile Impact per Florida Building Code HVHZ (TAS-201) and (ASTM E 1886/1996) test requirements.
1.	Cyclic Load Test per Florida Bulding Code HVHZ (TAS-203) and ASTM E 1886/1996 test requirements. 
2.	Uniform Static Load Test per Florida Building Code HVHZ (TAS-202) and ASTM E 330.

	F.	Structural Requirements, as measured in accordance with ANSI/ASTM E330:
		1.	Wind loads for exterior assemblies:
			a.	Basic Wind Speed:	130 mph, 43.3 psf
			b.	Importance factor Category I Building, IE = 1.22, IS = 1.1 IW-1.15

G.	Laboratory Testing: In accordance with ASTM E 1886 and 1996 test procedures. 	

1.04	SUBMITTALS

	A.	General:  Submit in accordance with General Conditions.
	
	B.	Product Data:
		1.	Submit manufacturer's descriptive literature for each manufactured products.
		2.	Include information for factory finishes, accessories and other required components.
		3.	Include color charts for finish indicating manufacturer's standard colors available for selection.

	C.	Shop Drawings:
		1.	Submit drawings indicating elevations, detailed design, dimensions, member profiles, joint locations, and arrangement of units, member connections, and thickness of various components.
		2.	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 system expansion and contraction
			
		4.	Indicate glazing details, methods, 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.
	
	E.	Samples:
1.	Submit manufactures samples indicating quality of finish in required colors.
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.

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

	G.	Warranty:  Submit specified warranties.

1.05	QUALITY ASSURANCE

	A.	Single Source Responsibility:
		1.	Provide curtain wall 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.

 1.06	PREINSTALLATION CONFERENCE
	A.	Conduct pre-installation conference in accordance with General Conditions.

	B.	Conference Purpose and Agenda:
		1.	Arrange with Architect and representatives of window and sealant manufacturer to visit Project site 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.

1.07	DELIVERY, STORAGE, AND HANDLING

	A.	Comply with requirements of General Conditions.
		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.
	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.

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

1.09	WARRANTY
	A.	Provide warranties in accordance with General Conditions.
	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.	Glass and glazing gaskets will not break or "pop" from frames due to design wind, expansion or contraction movement or structural loading.
		3.	Glazing sealants and gaskets will remain free from abnormal deterioration or dislocation due to sunlight, weather or oxidation.
	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

	A.	Subject to compliance with requirements indicated, provide products by one of the following: 
		1.	Vistawall Architectural Products, Terrell, TX.
		2.	Arcadia, Inc., High Impact Resistant System
		3.	Alcoa, Inc.
	
	B.	Substitutions: Submit with detail a minimum of 10 days prior to bid date.

Curtain wall systems included in this section are as follows:

IMPACT-RESISTANT SYSTEM - 2-1/2" x 7” mullion profiles; pressure glazed, front set, interior loaded, stick wall system; available with vertical structural glazed mullion option, structural sealant-glaze and dry-glaze fully gasketed option for 9/16” or 1 5/16” glazing infills. 
	 
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.

	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.

2.03	GLASS AND GLAZING ACCESSORIES

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.  
	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.
	 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.

2.05	FINISH
	A.	Organic Coating (high performance fluorocarbon):
		1.	Comply with requirements of AAMA 2605.
		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.
		3.	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.
		4.	Provide in either 2, 3, or 4 coat system as required for color selected.
		
	B.	Color Anodized:
		1.	Conforming to AA-M12C22A42 or A43 or A44 and AAMA 606.1 and 608.1.
		2.	Architectural Class, etched, medium matte, dark bronze, medium bronze colored anodic coating, as selected by architect.

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 and field conditions as descried in pre-installation meeting.
	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.

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