08 51 23 STEEL WINDOWS.doc

SECTION 08 51 23

STEEL WINDOWS

PART 1 GENERAL

1.1 REFERENCES

1.1.1 The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by the basic designation only. Unless otherwise noted, the latest published version and/or revision shall be used.

1.1.1.1 ASME INTERNATIONAL (ASME)

a. ASME A39.1 Safety Requirements for Window Cleaning

b. ASME B18.6.3 Machine Screws and Machine Screw Nuts

c. ASME B18.6.4 Thread Forming and Threaded Cutting Tapping Screws and Metallic Drive Screws (Inch Series)

1.1.1.2 ASTM INTERNATIONAL (ASTM)

a. ASTM A 1011 Standard Specification for Steel, Sheet, and Strip, Hot-Rolled, Carbon, Structural, High-Strength Low-Alloy and High-Strength Low-Alloy with Improved Formability

b. ASTM A 123 Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products

c. ASTM A 167 Standard Specification for Stainless and Heat-Resisting Chromium-Nickel Steel Plate, Sheet, and Strip

d. ASTM A 653 Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process

e. ASTM D 3656 Insect Screening and Louver Cloth Woven from Vinyl-Coated Glass Yarns

f. ASTM E 283 Determining the Rate of Air Leakage Through Exterior Windows, Curtain Walls, and Doors Under Specified Pressure Differences Across the Specimen

g. ASTM E 330 Structural Performance of Exterior Windows, Doors, Skylights and Curtain Walls by Uniform Static Air Pressure Difference

h. ASTM E 331 Water Penetration of Exterior Windows, Skylights, Doors, and Curtain Walls by Uniform Static Air Pressure Difference

1.1.1.3 NATIONAL FENESTRATION RATING COUNCIL (NFRC)

a. NFRC 100 Procedure for Determining Fenestration Product U-Factors

b. NFRC 200 Procedure for Determining Fenestration Product Solar Heat Gain Coefficient and Visible Transmittance at Normal Incidence

1.1.1.4 NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

a. NFPA 101 Life Safety Code

b. NFPA 80 Standard for Fire Doors and Other Opening Protectives

1.1.1.5 STEEL WINDOW INSTITUTE (SWI)

a. SWI SWS Steel Window Specifications

1.1.1.6 UNIFIED FACILITIES CRITERIA (UFC)

a. UFC 4-010-01 DoD Minimum Antiterrorism Standards for Buildings

1.1.1.7 U.S. ENVIRONMENTAL PROTECTION AGENCY (EPA)

a. Energy Star Energy Star Energy Efficiency Labeling System

1.1.1.8 U.S. GREEN BUILDING COUNCIL (USGBC)

a. LEED Leadership in Energy and Environmental Design(tm) Green Building Rating System for New Construction (LEED-NC)

1.2 SUBMITTALS

1.2.1 Government approval may be required on any of the following items. Items requiring submittals will be listed on the AF Form 66. Provide copies of all submittals per the requirements in Section 01 33 00, Submittal Procedures, or as listed on the AF Form 66.

1.2.1.1 SD-02 Shop Drawings

a. Windows

(1) Indicate elevations of windows, full-size sections, thicknesses and gages of metal, fastenings, proposed method of anchoring, size and spacing of anchors, details of construction, method of glazing, details of operating hardware, mullion details, weatherstripping, method of attachment of screens, metal subframes, stools, casings, sills, trim, window cleaners' bolts, other related items, and installation details.

1.2.1.2 SD-03 Product Data

a. Hardware

b. Fasteners;

(1) Submit documentation indicating percentage of post-industrial and post-consumer recycled content per unit of product. Indicate relative dollar value of recycled content products to total dollar value of products included in project.

c. Accessories

d. Local/Regional Materials;

(1) Submit documentation indicating distance between manufacturing facility and the project site. Indicate distance of raw material origin from the project site. Indicate relative dollar value of local/regional materials to total dollar value of products included in project.

1.2.1.3 SD-04 Samples

a. Color coating

(1) Submit chart of manufacturer's color coatings if factory finish is to be provided in lieu of field painting.

b. Windows

(1) Submit one complete, full size glazed window of each type proposed for use, complete with hardware, anchors, and other accessories. After approval, install each sample in the work, clearly identified, with location recorded.

1.2.1.4 SD-06 Test Reports

a. Air infiltration

b. Water infiltration

c. Mullion and transom bar wind load

1.2.1.5 SD-10 Operation and Maintenance Data

a. Windows, Data Package 1

(1) Submit in accordance with the requirements of Section 01 78 23 Operation And Maintenance Data.

1.2.1.6 SD-11 Closeout Submittals

1.3 TEST REPORT REQUIREMENTS

1.3.1 Air and Water Infiltration

1.3.1.1 ASTM E 283 and ASTM E 331. Do not exceed maximum air infiltration of one-half cubic foot per minute per foot of crack length when subjected to a static pressure of 1.56 pounds per square foot 25 miles per hour (mph). Water infiltration shall be "zero."

1.3.2 Mullion and Transom Bar Wind Load Tests

1.3.2.1 ASTM E 330. Members shall withstand a uniform wind load of 20 pounds per square foot of window area without deflecting more than 1/175 of the span.

1.4 PERFORMANCE REQUIREMENTS

1.4.1 Where applicable or required by the Statement of Work (SOW), exterior doors, glazing, window framing, connections, and supporting structural elements shall comply with Standards 10 and 12 of the UFC 4-010-01, DoD Minimum Antiterrorism Standards for Buildings.

1.5 DELIVERY AND STORAGE

1.5.1 Deliver to project site in undamaged condition. Store windows and components on edge, out of contact with the ground, under weathertight covering, and arranged to avoid bending, warping, or other damage.

1.6 SUSTAINABLE DESIGN REQUIREMENTS

1.6.1 Local/Regional Materials

1.6.1.1 Use materials or products extracted, harvested, or recovered, as well as manufactured, within a 500 mile radius from the project site, if available from a minimum of three sources.

PART 2 PRODUCTS

2.1 MATERIALS

2.1.1 Metal materials listed below shall contain a minimum of 5 percent post-consumer recycled content, or a minimum of 20 percent post-industrial recycled content.

2.1.2 Residential glazed systems (including frames and glass) shall be Energy Star qualified products as appropriate to Northern. Non-residential glassed systems (including frames and glass) shall be certified by the National Fenestration Rating Council with a whole-window Solar Heat Gain Coefficient (SHGC) maximum of .40 determined according to NFRC 200 procedures and a U-factor maximum of .35 (Btu per square foot x hr x degree F)W per square m x K in accordance with NFRC 100.

2.1.2.1 Steel Bars

a. SWI SWS.

2.1.2.2 Sheet Steel

a. ASTM A 1011.

2.1.2.3 Zinc-Coated Sheet Steel

a. ASTM A 653.

2.1.2.4 Zinc Coating

a. ASTM A 123.

2.1.2.5 Corrosion Resisting Sheet Steel

a. ASTM A 167.

2.1.2.6 Screws and Bolts

a. ASME B18.6.3 or ASME B18.6.4 as applicable.

2.2 FABRICATION OF WINDOWS

2.2.1 Form permanent joints by welding or mechanically fastening as specified for each type window. Use joints of strength to maintain structural value of members connected. Weld joints solid, remove excess metal, and dress smooth on exposed and contact surfaces. Closely fit joints formed with mechanical fastenings and make permanently watertight. Assemble frames and sash, including ventilators and thermal breaks, at the plant and ship as a unit with hardware unattached. Provide the following construction:

2.2.1.1 Where fixed window sections adjoin ventilator sections, provide fixed sash, fabricated from similar frame members, and of manufacturer's standard type suitable for the purpose.

2.2.1.2 Roll weathering surfaces integrally to provide two-point parallel-surface contact with overlap at both inside and outside points of closure.

2.2.1.3 Provide drips and weep holes as required to return water to outside.

2.2.1.4 Design glazed windows and rabbets suitable for glass thickness shown on drawings.

2.2.1.5 Use flathead, cross recessed type, exposed head screws and bolts with standard threads on windows, trim and accessories. Screw heads shall finish flush with adjoining surfaces. Self tapping sheet-metal screws are not acceptable.

2.2.1.6 For hot-dipped galvanized windows, use stainless steel or hot-spun galvanized steel fasteners. For windows with painted finish use cadmium plated or electro-galvanized fasteners. Finish exposed heads to match finish of windows.

2.3 FIRE RATED WINDOWS

2.3.1 Provide sash and frame with necessary hardware to conform to the requirements of Underwriters Laboratories Inc. (UL), for class of window indicated. Submit proof of conformance. UL label will be accepted as proof. Labeled window details take precedence over details indicated or specified for nonlabeled windows, except when sections required for nonlabeled windows are heavier than those required by UL. In lieu of UL label, written certification by approved nationally recognized testing agency may be submitted. Certification must state that complete window unit of type provided has been tested and conforms to published standards, including methods of tests, of UL.

2.4 PROVISIONS FOR GLAZING

2.4.1 Design sash for inside or outside glazing as indicated and for securing glass with metal beads or glazing clips and glazing compound. Where insulating glass is indicated, use rabbets of adequate weight and depth to receive and properly support glass and glazing accessories.

2.5 MULLIONS AND TRANSOM BARS

2.5.1 Provide mullions between multiple window units designed to withstand specified wind load requirements. Provide mullions with a thermal break. Secure mullions and transom bars to adjoining construction and window units in such a manner as to permit expansion and contraction and to form weathertight joint. Anchor mullions between windows requiring window cleaner's bolts to provide safe and adequate support for window cleaner. Where window cleaners' bolts are fastened to mullions, reinforce backs of mullions. Provide mullion covers of manufacturer's stock design on the interior and exterior to completely cover exposed joints and recesses between window units and for neat appearance. Provide special covers over structural supports at mullions where indicated.

2.6 METAL-TO-METAL JOINTS

2.6.1 Set in mastic, using type recommended by window manufacturer to provide weathertight joints. Remove excess mastic before it hardens.

2.7 ACCESSORIES

2.7.1 Provide windows with hardware, clips, fins, anchors, glazing beads, and fastenings, necessary for complete installation and operation of ventilators.

2.7.1.1 Anchors

a. Use hot-dip galvanized steel anchors. Secure anchors and fastenings to heads, jambs, and sills of openings, and fasten securely to windows or frames. Use anchors recommended by window manufacturer for specific type of construction and conceal. Anchor each frame at jambs with minimum of three adjustable steel anchors. Provide perforated anchor stems for mortar keying with anchor flanges of sufficient width to provide sliding friction fit inside frames. Extend perforated stems not less than 4 inches into masonry. For anchorage at concrete walls and prepared openings, equip frames with manufacturer's standard bent-clips located approximately 6 inches from each end and at midpoint.

2.7.1.2 Weatherstripping

a. Provide on all operable windows so that, when tested before leaving factory, in accordance with ASTM E 283, do not exceed a maximum air infiltration of one half cubic foot per minute per foot of crack length when subjected to static pressure of 1.56 pounds per square foot equivalent to wind velocity of 25 mph.

2.7.1.3 Hardware

a. Equip all operable sash with latching device which can be secured from inside. The item, type, and function of hardware required are specified under individual window type. Attach hardware securely to windows with corrosion resisting bolts or machine screws; do not use sheet metal screws. At fixed screens, adapt hardware to permit operation of ventilators. Fit and test hardware for each window at factory to ensure satisfactory operation and security.

(1) Material and Finish

(a) Provide non-magnetic type stainless steel exposed hardware with satin finish. Use steel or malleable iron hinges, with nonferrous pins, or with steel pins and non-ferrous bushings or washers.

2.7.1.4 Fasteners

a. Fabricated from 100 percent re-melted steel. Stainless steel or aluminum materials; zinc-coated or cadmium plated steel elsewhere as shown on drawing. Prime exposed heads of coated or plated fasteners and finish to match adjacent material.

2.7.1.5 Metal Sub-frames and Stools

a. Manufacturer's standard type designed to suit the particular window. Match exposed surfaces to windows.

2.8 WINDOW FINISH

2.8.1 Shop Primed Finish

2.8.1.1 After fabrication, clean all surfaces of windows, fins, mullions, cover plates, and screen frames and provide a hot-dip galvanized, phosphate-treated and shop primed finish. Conform to SWI SWS for the methods of cleaning, chemical treatment, galvanizing, and painting.

2.8.2 Factory Finish

2.8.2.1 In lieu of shop primed finish, factory finish may be provided using the following method, in which case finish field painting will not be required:

a. Chemically clean and bonderize windows. Apply dip coat of epoxy primer baked on for not less than 15 minutes at not less than 300 degrees F, followed by finish coat of alkyd-amine enamel of not less than one mil thickness, baked on for 15 minutes at not less than 300 degrees F.

b. Finish color coating to be selected from manufacturer's standard color chart.

c. Touch up abraded surfaces with enamel as specified for factory finish.

2.9 WINDOW TYPES

2.9.1 Conform to SWI SWS. Provide combinations, types and sizes indicated. Each window shall consist of a unit including subframe if applicable, frame, sash, hardware, mullions, trim, casing, insect screen, and anchors. Design windows indicated to have screen to accommodate items to be furnished.

2.9.1.1 Fixed Windows

a. Heavy Intermediate windows.

2.9.1.2 Security Windows

a. SWI SWS. Provide ventilators with manufacturer's standard hardware of iron, steel or zinc. Equip ventilators having locking rails more than 6 feet above floor with hardware designed for pole operation.

PART 3 EXECUTION

3.1 INSTALLATION

3.1.1 Install in accordance with window manufacturer's printed instructions and details. Coordinate installation with commissioning. Install fire rated windows in accordance with NFPA 80 and NFPA 101. Build in windows as work progresses or install without forcing into prepared window openings. Set at proper elevation, location, and reveal; plumb, square, level, and in alignment. Brace and stay to prevent distortion and misalignment. Protect ventilators and operating parts against dirt and building materials by keeping closed and locked to frame. Bed screws or bolts in sill members, joints at mullions, contacts of windows with sills, built-in fins, and subframes in mastic sealant recommended by window manufacturer. Install and seal windows in a manner that will prevent entrance of water and wind. Fasten insect screens securely in place.

3.2 ANCHORS AND FASTENINGS

3.2.1 Make provision for securing units to each other and to adjoining construction. Design head and jamb members to enter into masonry not less than 7/16 inch where windows are installed in direct contact with masonry. Where windows are set in prepared masonry openings, build in anchors and fastenings to jambs of openings and fasten securely to windows or frames and to adjoining construction. Space anchors not more than 18 inches apart on jambs and sills, and install a minimum of three anchors on each side of each opening. Anchors and fastenings shall have sufficient strength to hold member firmly in position. Where type, size, or spacing of anchors is not shown or specified, use expansion or toggle bolts or screws as best suited to construction material. Provide expansion shield and bolt assemblies of type designed to give holding power beyond tensile and shearing strength of bolt. Minimum fastener penetration shall be not less than that recommended by manufacturer for type fastener and wall material involved.

3.3 WEATHERSTRIPPING

3.3.1 Use bronze, spring-brass, or stainless steel and secure with non-ferrous screws. Secure weatherstripping or rubbing-blocks to parting-strip and each end of meeting-rails. For solid bar stock windows, use manufacturer's standard weatherstripping inserted into groove.

3.4 CLEANING

3.4.1 Clean interior and exterior surfaces of window units of mortar, plaster, paint spattering spots, and other foreign matter to present a neat appearance and to prevent fouling of weathering surfaces and weatherstripping, or interference with operation of hardware. Clean and touch up abraded surfaces. Replace with new windows any stained, discolored, or abraded windows that cannot be restored to original condition.

3.5 WASTE MANAGEMENT

3.5.1 Separate protective materials and corrugated cardboard in accordance with the Waste Management Plan and place in designated areas for reuse or recycling. Place materials defined as hazardous or toxic waste in designated containers. Close and seal tightly all partly used sealant containers and store protected in well ventilated fire-safe area at moderate temperature. Place used sealant tubes and containers in areas designated for hazardous materials.

END OF SECTION 08 51 23

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QSEU 09-0402

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