RFI__58_-_085653.pdf

02-01-16

512-173 08 56 53 - 1

SECTION 08 56 53

BLAST RESISTANT WINDOWS

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

Prefabricated fixed aluminum, blast resistant exterior window units.

Provide BR rated units for all exterior windows in the Community

Living Center.

1.2 RELATED REQUIREMENTS

A. Window Color: Section 09 06 00, SCHEDULE FOR FINISHES.

B. Glazing: Section 08 80 00, GLAZING.

1.3 APPLICABLE PUBLICATIONS

A. Comply with references to extent specified in this Section.

B. American Architectural Manufacturers Association (AAMA):

1. AAMA/WDMA/CSA 101/I.S.2/A440-11 Windows, Doors, and Skylights.

C. American Welding Society (AWS):

1. D1.1/D1.1M-15 - Structural Welding Code - Steel.

2. D1.3/D1.3M-08 - Structural Welding Code - Sheet Steel.

3. D1.6/D1.6M-07 - Structural Welding Code - Stainless Steel.

D. ASTM International (ASTM):

1. A36/A36M-14 - Carbon Structural Steel.

2. A123/A123M-15- Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel

Products.

3. A320/A320M-15a - Alloy-Steel and Stainless Steel Bolting Materials for Low-Temperature Service.

4. A666-15 - Annealed or Cold-Worked Austenitic Stainless Steel Sheet, Strip, Plate and Flat Bar.

5. B221-14 - Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes.

6. B221M-13 - Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes.

7. E283-04(2012) - Standard Test Method for Determining Rate of Air

Leakage Through Exterior Windows, Curtain Walls, and Doors Under

Specified Pressure Differences Across the Specimen.

8. E331-00(2009) - Standard Test Method for Water Penetration of

Exterior Windows, Skylights, Doors, and Curtain Walls by Uniform

Static Air Pressure Difference.

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9. F1233-08(2013) - Standard Test Method for Security Glazing Materials and Systems.

10. F1642-12 - Standard Test Method for Glazing and Glazing Systems

Subject to Airblast Loadings.

E. National Association of Architectural Metal Manufactures (NAAMM):

1. AMP 500-06 - Metal Finishes Manual.

F. Unified Facilities Criteria (UFC):

1. 4-010-01-2012 - DOD Minimum Antiterrorism Standards for Buildings.

1.4 PREINSTALLATION MEETINGS

A. Conduct preinstallation meeting at project site minimum 30 days before beginning Work of this Section.

1. Required Participants:

a. Contracting Officer's Representative.

b. Contractor.

c. Installer.

d. Manufacturer's field representative.

2. Meeting Agenda: Distribute agenda to participants minimum 3 days before meeting.

a. Installation schedule.

b. Installation sequence.

c. Preparatory work.

d. Protection before, during, and after installation.

e. Installation.

f. Transitions and connections to other work.

g. Inspecting and testing.

h. Other items affecting successful completion.

3. Document and distribute meeting minutes to participants to record decisions affecting installation.

1.5 SUBMITTALS

A. Submittal Procedures: Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA AND

SAMPLES.

B. Submittal Drawings:

1. Show dimensioned details of window units, including intended metal and glazing materials. 1: 20 (Three quarter inch equals 1 foot) scaled elevations showing interior and exterior. Indicated how window units can be replaced or removed, including replacement of glazing.

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2. Show detailed sections at 1: 5 (3 inch equal 1 foot) scale for members; indicating construction, size, and thickness of components, together with connections, fasteners, and means of separating dissimilar metals.

3. Provide final submittal drawings as DWG AutoCAD files.

C. Manufacturer's Literature and Data:

1. Description of each product, metal, and alloy when applicable.

2. Indicate manufacturer's recommendations for fasteners, welding, applied finishes, hardware and accessories.

3. Installation instructions.

4. Standard color chart.

D. Sustainable Construction Submittals:

1. Recycled Content: Identify post-consumer and pre-consumer recycled content percentage by weight.

E. Certificates: Indicate each product complies with specifications.

1. Window blast resistance.

F. Calculations: Prepared by qualified blast consultant verifying window and glazing assembly including anchors comply with specified blast resistance performance.

G. Qualifications: Substantiate qualifications comply with specifications.

1. Manufacturer with project experience list.

2. Installer with project experience list.

3. Welders and welding procedures.

1.6 QUALITY ASSURANCE

A. Manufacturer and Installer Qualifications:

1. Regularly manufactures and installs specified products.

2. Manufactured and installed specified products with satisfactory service on five similar installations for minimum five years.

a. Provide contact names and addresses for completed projects when requested by Contracting Officer's Representative.

B. Welders and Welding Procedures Qualifications:

1. Stainless Steel: AWS D1.6/D1.6M.

2. Steel: AWS D1.1/D1.1M.

3. Sheet Steel: AWS D1.3/D1.3M.

1.7 DELIVERY

A. Deliver prefabricated unit in manufacturer's original sealed packaging.

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B. Mark packaging, legibly. Indicate manufacturer's name or brand, unit type, and manufacture date.

C. Before installation, return or dispose of products within distorted, damaged, wet, or opened packaging.

1.8 STORAGE AND HANDLING

A. Store products indoors in dry, weathertight facility.

B. Protect products from damage during handling and construction operations.

1.9 FIELD CONDITIONS

A. Field Measurements: Verify field conditions affecting window fabrication and installation. Show field measurements on Submittal

Drawings.

1. Coordinate field measurement and fabrication schedule to avoid delay.

1.10 WARRANTY

A. Construction Warranty: FAR clause 52.246-21, "Warranty of

Construction."

PART 2 - PRODUCTS

2.1 SYSTEM PERFORMANCE

A. Design windows complying with specified performance:

1. Comply with UFC 4-010-01, ASTM F1642 Low Hazard, Provide indicated levels of resistance for blast resistant window assemblies.

Resistance level applies to anchorages, interfaces with adjoining substrates, glass retention, and hardware.

B. Blast Resistant (BR) Assemblies: Manufacturer's window unit assembled with panels, inserts, glazing and framing. Provide BR rated units for all exterior windows in the Community Living Center.

C. Thermal Movement: Assembly capable of withstanding thermal movements resulting from ambient range of 67 degrees C (150 degrees F) to

82 degrees C (180 degrees F)

D. Design Performance: Comply with structural performance, air infiltration, and water penetration requirements indicated in

AAMA/WDMA/CSA 101/I.S.2/A440 for AW Class.

1. Wind Load Resistance: ASCE/SEI 7; Design criteria as indicated on

Drawings.

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2. Water Infiltration: ASTM E331; no uncontrolled penetration at 300 Pa

(6.2 psf), minimum, pressure differential.

3. Air Infiltration: ASTM E283; Maximum 6 L/s/sq. m (0.1 cu.

Ft./min./sq. ft.) at static pressure difference of 300 Pa

(6.2 psf).

E. Blast Hazard Mitigation Design Criteria and Structural Performance:

1. General:

a. The glazed aluminum windows including connections shall be designed, fabricated, and installed to resist the required directly applied blast loads.

b. Design of mullions may be performed using inelastic dynamic structural analysis methods. If this approach is used, a linearly decaying load shall be applied to the window area and the resulting dynamic window edge reactions should be applied to the resisting mullion.

c. As an alternative to the inelastic dynamic structural analysis approach, the load may be applied to the tributary area of the mullion; however this method may result in an overly conservative design.

d. Dynamic blast loads shall be considered as an independent load case; however, designing to meet the blast requirements does not eliminate the need to design the framing members to meet all other applicable loading conditions within limits and under conditions indicated in the respective sections.

2. Blast Loads: Linearly decaying peak pressure of GP1.

a. The magnitude of GP1 are defined in the Physical Security Design Standards Data Definitions, a document separate from this Manual. It is provided on a need-to-know basis to the blast/structural engineers performing analysis and design of VA projects. Authorized users can contact the Office of Construction and Facilities Management (CFM) in VA to request the document.

3. Performance Criteria:

a. Glazing: Design, fabricate, and install glass units to comply with the GSA condition 3B - ASTM F1642-12 Low Hazard. After glass breakage occurs in response to full design blast loading, glass fragments that enter space shall land on the floor no further than 10 feet from the framing systems.

b. Glazed Aluminum Windows: Window and window frame blast loads shall be computed as the Glass Maximum Capacity specified in the Blast Loads section above, but not less than the actual design blast load.

1) Glass Maximum Capacity: The highest dynamic load at which the glass cracks but is retained by the frame. The glass maximum capacity is associated with the rupture strength of the laminated glass interlayer. The dynamic Glass Maximum Capacity load shall utilize the same time duration as the specified blast load.

c. Design, fabricate, and install windows to comply with the following:

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1) Rotation: Rotation of mullion ends shall not exceed 4 degrees (L/30) at Glass Maximum Capacity.

2) Ductility: Ductility of mullions shall not to exceed 10 at Glass Maximum Capacity.

4. Anchorage Design: The glazed window systems' connections shall be designed, fabricated, and installed to resist the blast loads specified in this Section within limits and under condition indicated.

a. Reaction Forces: Connections and anchorages to the structure shall be engineered for the direct and rebound maximum capacity of the window and framing members to ensure that connections and anchorages are never the weak link of the system. The maximum capacity of each framing member shall be calculated to account for the actual provided member section and material properties.

b. Design anchorages and connections to fully develop the calculated reaction forces following the procedures outlined in the latest versions of AISC Allowable Stress Design (ASD) or Load and Resistance Factor Design (LRFD) manuals for metal-to-metal connections/attachments and the latest version of ACI-318 for anchorage to concrete.

When using LRFD-based ACI-318 apply a load factor of 1.0 to the blast-induced window frame reactions obtained from dynamic analyses. When using the ASD manual to design connections/attachments for blast, allowable stresses can be increased by a factor of 1.7.

5. Aluminum Framing Members:

a. Minimum aluminum yield strength shall be as shown on Drawings but no less than 172 MPa (25,000 psi).

b. Snap on elements or other aluminum extrusions that are not structurally connected together to act as a single composite member shall not be considered in determining the structural capacity of the mullion.

c. The aluminum mullions shall be positively fastened to adequately transfer the blast end reaction forces across the connection between adjacent framing members.

6. Steel Framing Members:

a. Minimum steel yield strength shall be 248 MPa (36,000 psi) for steel bars used to reinforce vertical mullions of the windows and curtain walls, if determined necessary by calculation.

b. A dynamic enhancement factor of 1.2 may be applied to the yield stress for steel members, to account for strain rate effects.

c. The reinforcing steel bars and the aluminum mullions shall be sufficiently structurally connected to transfer the collected blast loads across the interface between the members.

d. Composite section properties of mullion components may only be used if calculations demonstrate strain compatibility across the interface.

e. Combined section properties of mullion components may be used if calculations demonstrate deformation

08 56 53 - 7 compatibility between the aluminum and steel components.

2.2 MATERIALS

A. Stainless Steel: ASTM A666, Type 304; formed stainless steel members.

B. Aluminum Extrusions: ASTM B221.

1. Framing Members: Alloy 6063-T5, -T6, or -T52, or alloy 6061-T6; 5 mm

(3/16 inch) minimum thickness.

2. Trim and Stops not exposed to forced entry attack: Alloy

6063-T5, -T6, or -T52; 1.5 mm (1/16 inch) minimum thickness.

C. Steel Shapes/Plates/Bars: ASTM A36/A36M, except where another designation is indicated.

D. Bolts and Fasteners: ASTM A320/A320M; Type 300-series stainless steel screws, bolts, nuts, and washers. Non-removable type where accessible from attack side.

E. Window Cleaner's Bolts: Nonmagnetic stainless steel, complying with safety regulations for window cleaning equipment.

F. Glazing Materials: Rated laminated assembly as specified in Section

08 80 00, GLAZING.

2.3 PRODUCTS - GENERAL

A. Provide blast resistant windows from one manufacturer.

B. Sustainable Construction Requirements:

1. Steel Recycled Content: 30 percent total recycled content, minimum.

2. Stainless Steel Recycled Content: 70 percent total recycled content, minimum.

3. Aluminum Recycled Content: 80 total recycled content, minimum.

2.4 FABRICATION

A. Assemblies: Shop fabricate matching profiles indicated on Drawings.

Make welds that comply with AWS standards; exposed welds ground smooth. Provide welded-in-place reinforcements and anchorage devices.

1. Removable Glazing Stops: Applied to room side of window.

a. Miter and weld removable stops at corners.

b. Secure removable stops to frames with countersunk screws, spaced as required for specified performance requirements.

2. New Building: Frame system with inner frame, outer frame, and fasteners to connect frames together.

a. Fabricate continuous outer frame for masonry embedment as exterior wall is constructed.

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b. Preassemble inner frame with glazing for bolting to outer frame.

c. Provide both frames shall be supplied by one manufacturer.

d. Anchorage: Provide anchors to provide the following:

1) Yield strength: 900 MPa (130,000 psi).

2) Tensile strength: 1033 MPa (150,000 psi).

B. Unit Anchorages: Fabricate metal anchorage system complying with performance requirements.

C. Unit Glazing: Laminated glass assembly meeting UFC 4-010-01 and tested according to ASTM F1642, as specified in Section 08 80 00, GLAZING.

2.5 FINISHES

A. General: Finish fabricated units including framing, sub-framing, hardware, and accessories.

1. Color: Refer to Section 09 06 00, SCHEDULE FOR FINISHES.

B. Steel Surfaces: ASTM A123/A123M galvanized.

C. Stainless Steel: NAAMM AMP 500; No. 4 polished finish, except retain manufacturer's standard mill finish on exposed fasteners and similar devices.

D. Blend welds to match adjacent finish.

E. Aluminum Anodized Finish: NAAMM AMP 500.

1. Color Anodized Finish: AA-C22A42 or AA-C22A44; Class I

Architectural, 0.018 mm (0.7 mil) thick.

2.6 ACCESSORIES

A. Bituminous Paint: SSPC Paint 12 (cold-applied asphalt mastic).

B. Welding Materials: Type to suit application for color match, strength and compatibility in fabricated item.

1. Stainless Steel: AWS D1.6/D1.6M, TIG using rods made from alloyed

Type 308 stainless steel.

2. Steel: D1.1/D1.1M.

3. Steel Sheet: D1.3/D1.3M-08.

C. Galvanizing Repair Paint: MPI No. 18.

PART 3 - EXECUTION

3.1 PREPARATION

A. Examine and verify substrate suitability for product installation.

1. Verify opening is correctly sized and located.

2. Verify substrate is prepared to receive frame anchors.

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B. Protect existing construction and completed work from damage.

C. Apply bituminous coating approximately 30 mils dry film thickness, or other suitable permanent separator, on surfaces of dissimilar metals, and metal surfaces in contact with concrete.

1. Where the metals are exposed to view, provide a plastic or neoprene separator between dissimilar metals.

3.2 INSTALLATION

A. Install products according to manufacturer's instructions and approved submittal drawings.

B. Install window units according to manufacturer's installation instructions.

C. Set units accurately, plumb, and level.

D. Securely anchor to partition framing as shown on approved submittal drawings to withstand specified performance.

E. Touch up damaged factory finishes.

1. Repair galvanized surfaces with galvanized repair paint.

3.3 CLEANING

A. Clean exposed window surfaces. Remove temporary labels, contaminants, and stains.

B. Clean glazing according to Section 08 80 00, GLAZING.

3.4 PROTECTION

A. Protect window units from construction operations.

B. Remove protective materials immediately before acceptance.

C. Repair damage.

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