AmendNo02Final.pdf

OMB Approval 2700‐0042

1. CONTRACT ID CODE PAGE OF PAGES

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT 1 2

2. AMENDMENT/MODIFICATION NO. 3. EFFECTIVE DATE 4. REQUISITION/PURCHASE REQ. NO. 5. PROJECT NO. (If applicable)

02 02/19/2010

6. ISSUED BY CODE 7. ADMINISTERED BY (If other than Item 6) CODE

U.S. Department of Agriculture, ARS FD, Facilities Contracts Branch, Darleen Masten 5601 Sunnyside Ave., Mail Stop 5124, RM. 4‐1252B Beltsville, MD 20705‐5124 Phone: 301‐504‐1183 E‐mail: darleen.masten@ars.usda.gov

Same as Block 7

8. NAME AND ADDRESS OF CONTRACTOR (No. Street, county, State and ZIP: Code) (�) 9A. AMENDMENT OF SOLICITATION NO.

AG‐3K15‐S‐09‐0019

X 9B. DATED (SEE ITEM 11)

01/29/2010

10A. MODIFICATION OF CONTRACT/ORDER NO.

10B. DATED (SEE ITEM 13)

CODE FACILITY CODE

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers is extended, is not extended.

Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended, by one of the following methods:

(a) By completing Items 8 and 15, and returning one (1) copy of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted; or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATA SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and data specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS,

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

(�) A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO

THE AUTHORITY OF FAR 43.103(b).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER Specify type of modification and authority)

E. IMPORTANT: Contractor is not, __ is required to sign this document and return copies to the issuing office.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

Amendment No. 02 to the reference Solicitation provides the following:

01. The date for receipt of all proposals is extended from Friday, March 5, 2010, to Thursday, March 18, 2010. Proposals are due no later than 2pm, local time. Proposals are to be mailed or hand‐carried to the following address:

U.S. Department of Agriculture, ARS, Facilities Division, FCB ATTN: Darleen Masten, George Washington Carver Center (GWCC) 5601 Sunnyside Avenue, MAIL STOP 5124, Room 4‐1252B Beltsville, Maryland 20705‐5124

Continued … Except at provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15A. NAME AND TITLE OF SIGNER (Type or print) 16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

15B. CONTRACTOR/OFFEROR 15C. DATE SIGNED 16B. UNITED STATES OF AMERICA 16C. DATE SIGNED

(Signature of person authorized to sign)

BY _____________________________________________

(Signature of Contracting Officer)

NSN 7540‐01‐152‐8070 30‐105 STANDARD FORM 30 (REV. 10‐83)

PREVIOUS EDITION UNUSABLE Computer Generated Prescribed by GSA

FAR (48 CFR) 53.24

SOLICIATION NO. AG-3K15-S-09-0019

AMENDMENT NO. 02

Amendment No. 02 to the reference Solicitation provides the following:

02. The date for receipt of Questions is extended from February 19, 2010, to March 9, 2010, 2pm, local time.

All questions must be E-Mailed to Contract Specialist Darleen Masten via E-Mail at darleen.masten@ars.usda.gov.

03. A second Site Visit will be held on March 4, 2010, at 10am. This will be another walk-thru tour only. We will meet in the lobby of the Administration Building of the U.S. National Arboretum. There is an alternative entrance into the Arboretum on R Street if the New York Avenue entrance is closed/blocked. Please pre-register with Contract Specialist Darleen Masten via E-Mail at darleen.masten@ars.usda.gov.

04. (a) SF-1442, Page 1 of the solicitation, Block 13, change “… original and 4 copies …” to read “… original and 5 copies …”

(b) Section L.12(a) (4) B, page 65, revise to read “B. One Original and 5 copies of the technical proposal.”

05. Attachments C, D, and E are the Options 04A and 04B, Windows Replacement drawings and specifications.

06. List of Attachments:

o Questions Received from Industry (Attachment A) o Pre-Proposal Conference/Site Visit Sign-In Sheets for 2/18/2010 and Handout (Attachment B) o List of Changes to Specifications & Drawings (Attachment C) o Changes to Specifications (Attachment D) o Changes to Drawings (Attachment E)

ATTACHMENT “A”

Questions Received from Industry

Please note that only answers provided via an amendment are the official answers to any questions. Additional questions are pending and will be answered in a separate amendment.

No. QUESTION ANSWER

01 “Can proposals be hand delivered?” Yes, proposals can be hand delivered, but must be delivered by the deadline to Contract Specialist Darleen Masten at the address listed in Block 7 of the SF-1442, in Beltsville, Maryland. Proposals will not be accepted at the Arboretum. If hand delivering a proposal, please go to the rear loading dock of the George Washington Carver Center. Please be sure to give the delivery person the name of Darleen Masten at (301) 504-1183 so he/she can have the guard call Ms. Masten.

02 “Where can I purchase/pick-up copies of the drawings or specifications?”

The drawings and specifications are posted on FedBizOpps. Please print them out or save to a USB flash drive and have a local printing firm print them for you.

03 “My bonding company just sent me an email and wants to know which is the correct Solicitation number to put on the bond. Is it AG-3K15-S-09- 0019A or AG-3K15-S-09-0019? The solicitation package has the number without the letter at the end and on FBO.gov is has the letter at the end.

They just want to be sure which number they are supposed to reference on our bid bond. I appreciate your help.”

The solicitation number is AG-3K15-S-09-0019.

04 Where will a contractor and his employees be allowed to park for the job?

There is parking at the loading dock of the Administration Building in the rear. If needed, there is additional parking by the New York Avenue entrance and contractors can car pool employees to the building. This area can also be used if needed for staging/storage. We do not want contractor employees parking in the visitors lot.

ATTACHMENT “B”

Pre-Proposal Conference/Site Visit Sign-In Sheets for 2/18/2010 and Handout

ATTACHMENT “C”

List of Changes to Specifications & Drawings

AMENDMENT 02

Solicitation No. AG-3K15-S-09-0019A Administration Building Renovation

USNA, Washington, DC 2-17-2010

The following changes are required.

1. Changes to Specifications:

a. Modify Specification Section 08710, Door Hardware, Paragraph 3.3 Hardware Sets.

Change Set HW-12 to read:

HW-12 Doors G24A and G24B

Base Bid:

Existing doors. No new hardware required.

Additive Bid Alternate No. 4A:

New aluminum and glass doors to receive:

1 set Offset Pivots, C07172 x 3/4-inch Offset or as required by Aluminum Door and Frame Supplier x 710 1 ea. Offset Pivot, C07321 x 3/4-inch Offset or as required by Aluminum Door and Frame Supplier x 710 1 ea. Exit Devices, Type 4, x Narrow Stile Push Pad Type, Function 08 - Grade 1 x Lever Handle x Cylinder Dogging x 626 1 ea. Closer, C02021 x PT-4F x Spring Cushioned Stop Arm x 689 1 ea. Threshold, J36130 x 5-inches wide x 1/2-inch maximum height x 628 1 set Weather Stripping, as specified in Section 08120

b. Modify Section 08710, Door Hardware, Paragraph 3.3 Hardware Sets.

Change Set HW-23 to read:

HW-23 Existing Doors G22B and G31A

Existing doors, each to receive:

1 ea. Electric Exit Device, (L221)(A156.3)(4)(8), Push Pad Type x Lever Handle x 24 VDC x 626

1 ea. Power Transfer Cable, 4 wire x 626 or 630 1 ea. Power Supply for Exit Devices, 120 VAC x 24 VDC - Mount in concealed, accessible, interior location near door served.

1 ea. Card Reader specified in Electronic Security System Specifications - Mount on exterior wall or curtain wall mullion as indicated at 34-inches above finish sidewalk elevation.

Additive Bid Alternate No. 4A – Pair of Doors G22B:

2 sets Offset Pivots, C07172 x 3/4-inch Offset or as required by Aluminum Door and Frame Supplier x 710 2 ea. Offset Pivot, C07321 x 3/4-inch Offset or as required by Aluminum Door and Frame Supplier x 710 1 ea. Electric Exit Device, (L221)(A156.3)(5)(8), Push Pad Type x Lever Handle x 24 VDC x 626 1 ea. Power Transfer Cable, 4 wire x 626 or 630 1 ea. Power Supply for Exit Devices, 120 VAC x 24 VDC - Mount in concealed, accessible, interior location near door served.

1 ea. Closer, C02021 x PT-4F x Spring Cushioned Stop Arm x 689 1 ea. Threshold, J36130 x 5-inches wide x 1/2-inch maximum height x 628 1 set Weather Stripping, as specified in Section 08120 1 ea. Card Reader specified in Electronic Security System Specifications - Mount

Additive Bid Alternate No. 4B –Door G31A:

and Frame Supplier x 710 1 ea. Offset Pivot, C07321 x 3/4-inch Offset or as required by Aluminum Door and Frame Supplier x 710 1 ea. Electric Exit Device, (L221)(A156.3)(4)(8), Push Pad Type x Lever Handle x 24 VDC x 626 1 ea. Power Transfer Cable, 4 wire x 626 or 630 1 ea. Power Supply for Exit Devices, 120 VAC x 24 VDC - Mount in concealed, accessible, interior location near door served.

1 ea. Closer, C02021 x PT-4F x Spring Cushioned Stop Arm x 689 1 ea. Threshold, J36130 x 5-inches wide x 1/2-inch maximum height x 628 1 set Weather Stripping, as specified in Section 08120 1 ea. Card Reader specified in Electronic Security System Specifications - Mount

c. Modify Section 08710, Door Hardware, Paragraph 3.3 Hardware Sets.

Change Set HW-38 to read:

HW-38 Doors 101B, 108A and 108B

Existing doors. No new hardware required.

Additive Bid Alternate No. 4A:

New Aluminum and Glass Doors, each to have:

and Frame Supplier x 710 2 ea. Offset Pivot, C07321 x 3/4-inch Offset or as required by Aluminum Door and Frame Supplier x 710 1 ea. Exit Devices, Type 4, x Narrow Stile Push Pad Type, Function 08 - Grade 1 x Lever Handle x Cylinder Dogging x 626 1 ea. Closer, C02021 x PT-4F x Spring Cushioned Stop Arm x 689 1 ea. Threshold, J36130 x 5-inches wide x 1/2-inch maximum height x 628 1 set Weather Stripping, as specified in Section 08120

d. Modify Section 08800, Glazing, in its entirety as provided in attached specification section.

e. Modify Section 08900, Glazed Curtain Wall, in its entirety as provided in attached specification section.

f. Add Section 12490, Window Treatments, provided in attached specification section.

2. Changes to Drawings:

a. Modify all Drawings. Change the total sequence number in lower right hand corner of title block from “161” to read “188”.

b. Add the following Drawings provided as listed in the following table

162 AD1.01A

DEMOLITION GROUND FLOOR PLAN - AREA 'A', ADDITIVE

BID ALTERNATE NO. 4A

163 AD1.02A

DEMOLITION FIRST FLOOR PLAN - AREA 'A', ADDITIVE BID

ALTERNATE NO. 4A

164 AD1.03A

DEMOLITION GROUND ANG FIRST FLOOR PLAN - AREA 'B',

ADDITIVE BID ALTERNATE NO. 4B

165 AD1.04A

DEMOLITION MEZZANINE FLOOR PLAN - AREA 'A',

ADDITIVE BID ALTERNATE NO. 4A

166 AD4.01A

DEMOLITION ELEVATONS, ADDITIVE BID ALTERNATE NO.

4A

167 AD4.02A

DEMOLITION ELEVATONS, ADDITIVE BID ALTERNATES NO.

4A AND 4B

168 A1.03A

GROUND FLOOR PLAN - AREA 'A', ADDITIVE BID

ALTERNATE NO. 4A

169 A1.04A

FIRST FLOOR PLAN - AREA 'A', ADDITIVE BID ALTERNATE

NO. 4A

170 A1.05A

GROUND FLOOR AND FIRST FLOOR PLAN - AREA 'B',

ADDITIVE BID ALTERNATE NO. 4B

171 A1.06A

MEZZANINE PLAN , AREA 'A', ADDITIVE BID ALTERNATE

NO. 4A

172 A4.01A BUILDING ELEVATIONS, ADDITIVE BID ALTERNATE NO. 4A

173 A4.02A

BUILDING ELEVATIONS, ADDITIVE BID ALTERNATES NO. 4A

AND 4B

174 A6.03A GROUND FLOOR - AREA 'A' WINDOW COVERINGS PLAN

175 A6.04A FIRST FLOOR - AREA 'A' WINDOW COVERINGS PLAN

176 A6.05A

GROUND FLOOR AND FIRST FLOOR - AREA 'B' WINDOW

COVERINGS PLANS

177 A6.06A

ELEVATIONS OF EXISTING CURTAIN WALL TYPES WITH

WINDOW SHADES

178 A6.07A

ELEVATIONS OF EXISTING CURTAIN WALL TYPES WITH

WINDOW SHADES

179 A7.01A

DOOR SCHEDULE, DOOR TYPES AND FRAME TYPES,

ADDITIVE BID ALTERNATES NO. 4A AND 4B

180 A7.02A DOOR SCHEDULE, ADDITIVE BID ALTERNATE NO. 4A

181 A10.01A

EXTERIOR CURTAIN WALL ELEVATIONS, ADDITIVE BID

ALTERNATE NO. 4A

182 A10.02A

EXTERIOR CURTAIN WALL ELEVATIONS, ADDITIVE BID

ALTERNATE NO. 4B

183 A10.03A

EXTERIOR CURTAIN WALL ELEVATIONS, ADDITIVE BID

ALTERNATE NO. 4A

184 A11.01A

GLAZED CURTAIN WALL DETAILS, ADDITIVE BID

ALTERNATE NO. 4A

185 A11.02A

GLAZED CURTAIN WALL DETAILS, ADDITIVE BID

ALTERNATES NO. 4A AND 4B

186 A11.03A

GLAZED CURTAIN WALL DETAILS, ADDITIVE BID

ALTERNATES NO. 4A AND 4B

187 A11.04A

GLAZED CURTAIN WALL DEMO DETAILS, ADDITIVE BID

ALTERNATE NO. 4A

188 A11.05A

GLAZED CURTAIN WALL DETAILS, ADDITIVE BID

ALTERNATE NO. 4A

c. Modify Sheet AD1.01, DEMOLITION GROUND FLOOR PLAN - AREA 'A', Sequence

No. 18:

Add General Note 14 to read: “REMOVE EXISTING WINDOW BLINDS WHERE

THEY OCCUR.”

d. Modify Sheet AD1.01, DEMOLITION GROUND FLOOR PLAN - AREA 'A', Sequence

Add the following to Floor Plan Demolition Flag Note 6: “REFER TO DEMOLITION

ELEVATON 1/A11.04A”.

e. Modify Sheet AD1.01, DEMOLITION GROUND FLOOR PLAN - AREA 'A', Sequence

Delete Floor Plan Demolition Flag Note 12 and add note clarifying status of existing masonry wall between Mounting B017 and Electrical B018, as indicated on attached drawing, “PARTIAL DEMOLITION GROUND FLOOR PLAN – AREA ‘A’.

f. Modify Sheet AD1.03, DEMOLITION GROUND AND FIRST FLOOR PLAN – AREA ‘B’, Sequence No. 20:

Add Floor Plan Demolition Flag Note 29 for existing window blinds at curtain wall at east and west sides of building wing at Ground Floor Plan – Area ‘B’ to read:

LEAVE EXISTING VERTICAL WINDOW BLINDS IN PLACE DURING

DEMOLITION AND CONSTRUCTION ON THIS FLOOR, AREA ‘B’.

REMOVE BLINDS UPON COMPLETION OF CONSTRUCTION, JUST PRIOR

TO INSTALLATION OF NEW WINDOW COVERINGS UNDER BASE BID OR

NEW VENEER CURTAIN WALL UNDER ADDITIVE BID ALTERNATE NO.

4B.

g. Modify Sheet A1.04, FIRST FLOOR PLAN – AREA ‘A’, Sequence No. 37:

On First Floor Plan – Area ‘A’, at grid location 7.7-O, delete reference to wall section 1/A8.04.

h. Modify Sheet A1.05, GROUND FLOOR AND FIRST FLOOR PLAN – AREA ‘B’, Sequence No. 38:

On First Floor Plan – Area ‘B’, delete graphic depiction of casework along west wall of Herbarium Compactor 161.

i. Modify Sheet A1.05, GROUND FLOOR AND FIRST FLOOR PLAN – AREA ‘B’, Sequence No. 38:

On Ground Floor Plan – Area ‘B’, add Flag Note 24 for wall recess at recessed wall heater at south wall of Stair #3 G031 to read:

PROVIDE 1-HOUR FIRE RESISTIVE RATED CONSTRUCTION IN RECESS

FOR RECESSED WALL TYPE UNIT HEATER. REFER TO MECHANICAL

DRAWINGS FOR HEATER.

j. Modify Sheet A7.01, DOOR SCHEDULE, DOOR TYPES AND FRAME TYPES, Sequence No. 56:

On Door Schedule, change Hardware Group for door G22B to read “HW-23” and delete Hardware Group for door G22C.

k. Sheet A3.02, ROOF DETAILS, Sequence No. 45:

Add 4” thick rigid insulation behind new spandrel glass which is being installed in existing curtain wall system. Fit between steel tube framing with aluminum covers, extend from sill to roof, and seal joints where insulation meets steel tube framing.

l. Sheet A11.02, GLAZED CURTAIN WALL DETAILS, Sequence No. 70:

On Detail 14, change lower note, “NEW TERRAZZO FLOORING WITH UNDERBED - MATCH EXISTING TERRAZZO” to read: “EXISTING

STRUCTURAL CONCRETE FLOOR SLAB”.

ADMINISTRATION BUILDING RENOVATION

USNA, WASHINGTON, DC

18-AD1.01 - PARTIAL DEMOLITION

GROUND FLOOR PLAN - AREA 'A'

MERRICK & COMPANY

17 FEBRUARY 2010

bhuston Callout

MASONRY WALL

TO REMAIN

bhuston Line bhuston Line bhuston Polygon bhuston Polygon

ATTACHMENT “D”

Changes to Specifications

U.S. NATIONAL ARBORETUM 109145A

ADMINISTRATION BUILDING RENOVATION, WASHINGTON D.C.

SECTION 08800

GLAZING

10/03

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI)

ANSI Z97.1 (1984; R 1994) Safety Glazing Materials Used in Buildings

ASTM INTERNATIONAL (ASTM)

ASTM C 1036 (2001) Flat Glass

ASTM C 1048 (2004) Heat-Treated Flat Glass - Kind HS, Kind FT Coated and Uncoated Glass

ASTM C 1184 (2000ae1) Structural Silicone Sealants

ASTM C 509 (2000) Elastomeric Cellular Preformed Gasket and Sealing Material

ASTM C 864 (1999) Dense Elastomeric Compression Seal Gaskets, Setting Blocks, and Spacers

ASTM C 920 (2002) Elastomeric Joint Sealants

ASTM D 395 (2003) Rubber Property - Compression Set

ASTM E 119 (2000a) Fire Tests of Building Construction and Materials

ASTM E 1300 (2004e1) Determining Load Resistance of Glass in Buildings

ASTM E 773 (2001) Accelerated Weathering of Sealed Insulating Glass Units

ASTM E 774 (1997) Classification of the Durability of Sealed Insulating Glass Units

GLASS ASSOCIATION OF NORTH AMERICA (GANA)

GANA Glazing Manual (2004) Glazing Manual

GANA Sealant Manual (1990) Sealant Manual

GANA Standards Manual (2001) Tempering Division's Engineering Standards Manual

SECTION 08800 Page 1

17 FEBRUARY 10

INSULATING GLASS MANUFACTURERS ALLIANCE (IGMA)

SIGMA A1202 (1983) Commercial Insulating Glass Dimensional Tolerances

U.S. NATIONAL ARCHIVES AND RECORDS ADMINISTRATION (NARA)

16 CFR 1201 Safety Standard for Architectural Glazing Materials

1.2 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for Contractor Quality Control approval.. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government.

The following shall be submitted in accordance with Section 01330 SUBMITTAL

PROCEDURES:

SD-02 Shop Drawings

Installation; G

Drawings showing complete details of the proposed setting methods, mullion details, edge blocking, size of openings, frame details, materials, and types and thickness of glass.

SD-03 Product Data

Glazing Accessories

Manufacturer's descriptive product data, handling and storage recommendations, installation instructions, and cleaning instructions.

SD-04 Samples

Insulating Glass (Additive Bid Alternates No. 4A and 4B); G

Glazing Compound

Glazing Tape

Sealant

Two 8 x 10 inch samples of each of the following: Spandrel glass and insulating glass units.

Three samples of each indicated material

SD-07 Certificates

Insulating Glass (Additive Bid Alternates No. 4A and 4B)

Glazing Accessories

Certificates from the manufacturer attesting that the units meet the luminous and solar radiant transmission requirements for heat absorbing glass.

SECTION 08800 Page 2

SD-08 Manufacturer's Instructions

Setting and sealing materials

Glass setting

Submit glass manufacturer's recommendations for setting and sealing materials and for installation of each type of glazing material specified.

1.3 SYSTEM DESCRIPTION

Glazing systems shall be fabricated and installed watertight and airtight to withstand thermal movement and wind loading without glass breakage, gasket failure, deterioration of glazing accessories, and defects in the work. Glazed panels shall comply with the safety standards, as indicated in accordance with ANSI Z97.1. Glazed panels shall comply with indicated wind/snow loading in accordance with ASTM E 1300.

1.4 DELIVERY, STORAGE, AND HANDLING

Deliver products to the site in unopened containers, labeled plainly with manufacturers' names and brands. Store glass and setting materials in safe, enclosed dry locations and do not unpack until needed for installation.

Handle and install materials in a manner that will protect them from damage.

1.5 ENVIRONMENTAL REQUIREMENTS

Do not start glazing work until the outdoor temperature is above 40 degrees F and rising, unless procedures recommended by the glass manufacturer and approved by the Contracting Officer are made to warm the glass and rabbet surfaces. Provide ventilation to prevent condensation of moisture on glazing work during installation. Do not perform glazing work during damp or rainy weather.

1.6 WARRANTY

1.6.1 Warranty for Insulating Glass Units for Additive Bid Alterenates No.

4A and 4B

Warranty insulating glass units against development of material obstruction to vision (such as dust, fogging, or film formation on the inner glass surfaces) caused by failure of the hermetic seal, other than through glass breakage, for a 10-year period following acceptance of the work. Provide new units for any units failing to comply with terms of this warranty within 45 working days after receipt of notice from the Government.

1.6.2 Monolithic Opacified Spandrel

Manufacturer shall warrant the opacifier film on the spandrel to be free of peeling for a period of five years after Date of Substantial Completion.

Warranty shall be signed by manufacturer.

PART 2 PRODUCTS

2.1 GLASS

ASTM C 1036, unless specified otherwise. All glazing in doors, sidelights, SECTION 08800 Page 3 window wall and curtain wall shall be certified subject to human impact as safety glazing material conforming to 16 CFR 1201.

2.1.1 Clear Glass

Type I, Class 1 (clear), Quality q3 (A). Provide for glazing openings not indicated or specified otherwise. Use minimum 1/4 inch float glass.

2.1.2 Annealed Glass for Interior Use

Annealed glass shall be Type I transparent flat type, Class 1 - clear, Quality q3 - glazing select, 1/4 inch thick, conforming to ASTM C 1036.

2.1.3 Tempered Glass

2.1.3.1 Clear - For Interior Use

ASTM C 1048, Kind FT (fully tempered), Condition A (uncoated), Type I, Class 1 (clear), Quality q3 (A), 1/4 inch thick, 89 percent light transmittance, 0.94 shading coefficient conforming to ASTM C 1048 and GANA Standards Manual.

2.1.3.2 Tinted - For Exterior Doors

ASTM C 1048, Kind FT (fully tempered), Condition A (uncoated), Type I, Class 2 (tinted heat absorbing), Quality q3, (A) 1/4 inch thick, 44 percent light transmittance, 0.67 shading coefficient conforming to ASTM C 1048 and GANA Standards Manual. Color shall be gray.

2.1.4 Heat-Strengthened Glass

ASTM C 1048, Kind HS (heat strengthened), Condition A (uncoated), Type I, Class 2 (tinted heat absorbing), Quality q4 (A), 1/4 inch thick.

2.1.5 Spandrel Glass

2.1.5.1 Ceramic-Opacified Spandrel Glass

Ceramic-opacified spandrel glass shall be Kind HS (heat-strengthened), Type I, transparent flat type, Condition B, coated with a colored ceramic material on No. 2 surface, Quality q3 - glazing select, 1/4 inch thick, conforming to ASTM C 1048. Color shall be selected from full range of industry colors.

Where indicated or required for conformance with 16 CFR 1201 safety glazing requirements, glass for interior and exterior panes shall be ASTM C 1048, Kind FT (fully tempered).

2.1.6 Fire/Safety Rated Glass

Fire/safety rated glass shall be laminated Type I transparent flat type, Class 1-clear. Glass shall have a 45 minute rating when tested in accordance with ASTM E 119. Glass shall be permanently labeled with appropriate markings.

2.2 INSULATING GLASS UNITS

Two panes of glass separated by a dehydrated airspace and hermetically sealed. Dimensional tolerances shall be as specified in SIGMA A1202. The

SECTION 08800 Page 4 units shall conform to ASTM E 773 and ASTM E 774, Class A. Spacer shall be roll-formed, dark bronze color, with bent or tightly welded or keyed and sealed joints to completely seal the spacer periphery and eliminate moisture and hydrocarbon vapor transmission into airspace through the corners. Primary seal shall be compressed polyisobutylene and the secondary seal shall be a specially formulated silicone compatible with structural silicone butt-glazed application. Provide 1/2 inch air space.

2.2.1 Low Emissivity Insulating Vision Glass

Interior glass pane for Low-E insulating vision glass units shall be ASTM C 1048, Kind HS (heat strengthened), Condition A (uncoated), Type I, Class 1 (clear), Quality q3 - glazing select, 1/4 inch thick. Exterior glass pane shall be ASTM C 1048, Kind HS (heat strengthened), Type I, Class 2 (tinted heat absorbing) with anti-reflective low-emissivity coating on No. 2 surface (inside surface of exterior pane), Quality q3-glazing select, color gray. Glass performance shall be U-Value 0.29, visible light transmittance 31 percent, solar heat gain coefficient of 0.19. Where indicated or required for conformance with 16 CFR 1201 safety glazing requirements, glass for interior and exterior panes shall be ASTM C 1048, Kind FT (fully tempered).

2.2.2 Low Emissivity Insulating Spandrel Glass

Interior glass pane for Low-E insulating spandrel glass units shall be ASTM C 1048, Kind HS (heat strengthened), Condition B (coated with a colored ceramic material on No. 4 Surface), Type I, Class 1 (clear), Quality q3 - glazing select, 1/4 inch thick. Color of ceramic material shall be gray, selected from full range of industry colors. Exterior glass pane shall be ASTM C 1048, Kind HS (heat strengthened), Type I, Class 2 (tinted heat absorbing) with anti-reflective low-emissivity coating on No.

2 surface (inside surface of exterior pane), Quality q3-glazing select, color gray to match vision glass exterior glass pane. Where indicated or required for conformance with 16 CFR 1201 safety glazing requirements, glass for interior and exterior panes shall be ASTM C 1048, Kind FT (fully tempered).

2.3 SETTING AND SEALING MATERIALS

Provide as specified in the GANA Glazing Manual and manufacturer's recommendations, unless specified otherwise herein. Do not use metal sash putty, nonskinning compounds, nonresilient preformed sealers, or impregnated preformed gaskets. Materials exposed to view and unpainted shall be gray or neutral color, unless specified otherwise below.

2.3.1 Sealants

Provide elastomeric and structural sealants.

2.3.1.1 Elastomeric Sealant

ASTM C 920, Type S or M, Grade NS, Class 12.5, Use G. Use for channel or stop glazing metal sash. Sealant shall be chemically compatible with setting blocks, edge blocks, and sealing tapes, with sealants used in manufacture of insulating glass units. Color of sealant shall match aluminum frame finish. At structural silicone butt-glazed joints, color of sealant for weather seal shall be black.

SECTION 08800 Page 5

2.3.1.2 Structural Sealant

ASTM C 1184, black color.

2.3.2 Preformed Channels

Neoprene, vinyl, or rubber, as recommended by the glass manufacturer for the particular condition.

2.3.3 Sealing Tapes

Preformed, semisolid, polymeric-based material or proper size and compressibility for the particular condition. Use only where glazing rabbet is designed for tape and tape is recommended by the glass or sealant manufacturer. Provide spacer shims for use with compressible tapes. Tapes shall be chemically compatible with the product being set.

2.3.4 Setting Blocks and Edge Blocks

Neoprene setting blocks shall be dense extruded type conforming to ASTM D 395, Method B, Shore A durometer between 70 and 90. Edge blocking shall be Shore A durometer of 50 (+ or - 5). Silicone setting blocks shall be required when blocks are in contact with silicone sealant. Profiles, lengths and locations shall be as required and recommended in writing by glass manufacturer.

2.3.5 Glazing Gaskets

Glazing gaskets shall be extruded with continuous integral locking projection designed to engage into metal glass holding members to provide a watertight seal during dynamic loading, building movements and thermal movements. Glazing gaskets for a single glazed opening shall be continuous one-piece units with factory-fabricated injection-molded corners free of flashing and burrs. Glazing gaskets shall be in lengths or units recommended by manufacturer to ensure against pull-back at corners.

Glazing gasket profiles shall be as indicated on drawings.

2.3.5.1 Fixed Glazing Gaskets

Fixed glazing gaskets shall be closed-cell (sponge) smooth extruded compression gaskets of cured elastomeric virgin neoprene compounds conforming to ASTM C 509, Type 2, Option 1.

2.3.5.2 Wedge Glazing Gaskets

Wedge glazing gaskets shall be high-quality extrusions of cured elastomeric virgin neoprene compounds, ozone resistant, conforming to ASTM C 864, Option 1, Shore A durometer between 65 and 75.

2.3.5.3 Aluminum Framing Glazing Gaskets

Glazing gaskets for aluminum framing shall be permanent, elastic, non-shrinking, non-migrating, watertight and weathertight.

2.3.6 Accessories

Provide as required for a complete installation, including glazing points, clips, shims, angles, beads, and spacer strips. Provide noncorroding metal accessories. Provide primer-sealers and cleaners as recommended by the

SECTION 08800 Page 6 glass and sealant manufacturers.

PART 3 EXECUTION

3.1 PREPARATION

Preparation, unless otherwise specified or approved, shall conform to applicable recommendations in the GANA Glazing Manual, GANA Sealant Manual and manufacturer's recommendations. Determine the sizes to provide the required edge clearances by measuring the actual opening to receive the glass. Grind smooth in the shop glass edges that will be exposed in finish work. Leave labels in place until the installation is approved. Securely fix movable items or keep in a closed and locked position until glazing compound has thoroughly set.

3.2 GLASS SETTING

Shop glaze or field glaze items to be glazed using glass of the quality and thickness specified or indicated. Glazing, unless otherwise specified or approved, shall conform to applicable recommendations in the GANA Glazing Manual, GANA Sealant Manual, and manufacturer's recommendations. Aluminum windows, wood doors, and wood windows may be glazed in conformance with one of the glazing methods described in the standards under which they are produced, except that face puttying with no bedding will not be permitted. Handle and install glazing materials in accordance with manufacturer's instructions. Use beads or stops which are furnished with items to be glazed to secure the glass in place.

3.2.1 Sheet Glass

Cut and set with the visible lines or waves horizontal.

3.2.2 Installation of Laminated Glass

Sashes which are to receive laminated glass shall be weeped to the outside to allow water drainage into the channel.

3.3 CLEANING

Clean glass surfaces and remove labels, paint spots, putty, and other defacement as required to prevent staining. Glass shall be clean at the time the work is accepted.

3.4 PROTECTION

Glass work shall be protected immediately after installation. Glazed openings shall be identified with suitable warning tapes, cloth or paper flags, attached with non-staining adhesives. Protective material shall be placed far enough away from the coated glass to allow air to circulate to reduce heat buildup and moisture accumulation on the glass. Glass units which are broken, chipped, cracked, abraded, or otherwise damaged during construction activities shall be removed and replaced with new units.

-- End of Section --

SECTION 08800 Page 7

SECTION 08900

GLAZED CURTAIN WALL

09/99

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ALUMINUM ASSOCIATION (AA)

AA ASD1 (2003) Aluminum Standards and Data

AMERICAN ARCHITECTURAL MANUFACTURERS ASSOCIATION (AAMA)

AAMA 501 (1994) Methods of Test for Exterior Walls

AAMA 609/610 (2002) Cleaning and Maintenance Guide for Architecturally Finished Aluminum

AAMA 611 (1998) Voluntary Specification for Anodized Architectural Aluminum; includes 604.2, 606.1, 607.1 and 608.1 (which are no longer available as separate documents)

AAMA 800 (1992) Voluntary Specifications and Test Methods for Sealants

AAMA CW-10 (1997) Care and Handling of Architectural Aluminum from Shop to Site

AAMA MCWM-1 (1989) Metal Curtain Wall Manual

AMERICAN WELDING SOCIETY (AWS)

AWS A5.10/A5.10M (1999) Bare Aluminum and Aluminum Alloy Welding Electrodes and Rods

AWS D1.1/D1.1M (2004) Structural Welding Code - Steel

ASTM INTERNATIONAL (ASTM)

ASTM A 123/A 123M (2002) Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products

ASTM A 153/A 153M (2004) Zinc Coating (Hot-Dip) on Iron and Steel Hardware

ASTM A 167 (2004) Stainless and Heat-Resisting Chromium-Nickel Steel Plate, Sheet, and Strip

ASTM A 36/A 36M (2004) Carbon Structural Steel

SECTION 08900 Page 1

ASTM A 570/A 570M (1998) Steel, Sheet and Strip, Carbon, Hot-Rolled

ASTM A 572/A 572M (2003a) High-Strength Low-Alloy Columbium-Vanadium Structural Steel

ASTM A 611 (1997) Structural Steel (SS), Sheet, Carbon, Cold-Rolled

ASTM A 653/A 653M (2004a) Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process

ASTM B 108 (2003a) Aluminum-Alloy Permanent Mold Castings

ASTM B 136 (1984; R 2003) Measurement of Stain Resistance of Anodic Coatings on Aluminum

ASTM B 137 (1995; R 2004) Measurement of Coating Mass Per Unit Area on Anodically Coated Aluminum

ASTM B 209 (2004) Aluminum and Aluminum-Alloy Sheet and Plate

ASTM B 221 (2004a) Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes

ASTM B 244 (1997; R 2002) Measurement of Thickness of Anodic Coatings on Aluminum and of Other Nonconductive Coatings on Nonmagnetic Basis Metals with Eddy-Current Instruments

ASTM B 26/B 26M (2003) Aluminum-Alloy Sand Castings

ASTM B 85 (2003) Aluminum-Alloy Die Castings

ASTM C 1048 (2004) Heat-Treated Flat Glass - Kind HS, Kind FT Coated and Uncoated Glass

ASTM C 236 (1989; R 1993e1) Steady-State Thermal Performance of Building Assemblies by Means of a Guarded Hot Box

ASTM C 612 (2004) Mineral Fiber Block and Board Thermal Insulation

ASTM C 665 (2001e1) Mineral-Fiber Blanket Thermal Insulation for Light Frame Construction and Manufactured Housing

ASTM C 864 (1999) Dense Elastomeric Compression Seal Gaskets, Setting Blocks, and Spacers

ASTM C 920 (2002) Elastomeric Joint Sealants

ASTM E 119 (2000a) Fire Tests of Building Construction and Materials

SECTION 08900 Page 2

ASTM E 136 (2004) Behavior of Materials in a Vertical Tube Furnace at 750 Degrees C

ASTM E 283 (2004) Determining the Rate of Air Leakage Through Exterior Windows, Curtain Walls, and Doors Under Specified Pressure Differences Across the Specimen

ASTM E 330 (2002) Structural Performance of Exterior Windows, Doors, Skylights and Curtain Walls by Uniform Static Air Pressure Difference

ASTM E 331 (2000) Water Penetration of Exterior Windows, Skylights, Doors, and Curtain Walls by Uniform Static Air Pressure Difference

ASTM E 34 (1994; R 2002) Chemical Analysis of Aluminum and Aluminum-Base Alloys

ASTM E 546 (1988; R 1999e1) Frost Point of Sealed Insulating Glass Units

ASTM E 576 (1988; R 1999e1) Frost Point of Sealed Insulating Glass Units in the Vertical Position

ASTM E 84 (2004) Surface Burning Characteristics of Building Materials

NATIONAL ASSOCIATION OF ARCHITECTURAL METAL MANUFACTURERS (NAAMM)

NAAMM MFM (1988)Metal Finishes Manual

1.2 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for Contractor Quality Control approval. The following shall be submitted in accordance with Section 01330

SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Glazed curtain wall system

Submit for curtain wall system, accessories. Drawings shall indicate in detail all system parts including elevations, full-size sections, framing, jointing, panels, types and thickness of metal, flashing details, field connections, weep and drainage system, finishes, sealing methods, glazing, glass sizes and details, insulation materials, and erection details.

For Additive Bid Alternates No. 4A and 4B, in addition to shop drawings for curtain wall system, accessories, submit shop drawings for mock-up. Tentative approval of shop drawings for the complete curtain wall assembly shall be received before fabrication of mock-up. Final approval of drawings for the

SECTION 08900 Page 3 complete assembly will be deferred pending approval of mock-up and accessories.

SD-03 Product Data

Glazed curtain wall system

Include descriptive literature, detailed specifications, and available performance test data.

SD-05 Design Data

Calculations

SD-08 Manufacturer's Instructions

Glazed curtain wall system

Insulating glass

1.3 REQUIREMENT FOR DESIGN DATA

For Base Bid submit structural calculations for new mullions. For Additive Bid Alternates No. 4A and 4B, submit structural and thermal calculations for the complete curtain wall assembly.

1.4 QUALITY ASSURANCE

1.4.1 Testing Requirements

The components listed below shall have been tested in accordance with the requirements below, and shall meet performance requirements specified.

a. Joint and Glazing Sealants: Perform tests as required by applicable publications referenced.

b. Preformed Compression Gaskets and Seals: ASTM C 864.

c. Spandrel Glass: Fallout resistance test, ASTM C 1048.

d. Anodized Finishes: Stain resistance, coating weight, and coating thickness tests, ASTM B 136, ASTM B 137, and ASTM B 244, respectively.

e. Insulating Glass for Additive Bid Alternates No. 4A and 4B:

ASTM E 546 or ASTM E 576 at minus 20 degrees F, no frost or dew point.

1.4.2 Mockup

1.4.2.1 Construction

Construct at job site on existing steel framed back-up full size typical wall unit which incorporates horizontal and vertical joints, framing, spandrel glass, panels, glazing, and other accessories as detailed and specified. Mock-up wall unit size shall be a nominal 19 feet-4 inches wide by 12 feet-11 inches high at the north face of Area 'A' for Additive Bid Alternate No. 4A (Curtain Wall Elevation G), and a nominal 19 feet-4 inches wide by two stories high at east side of Area 'B' for Additive Bid

SECTION 08900 Page 4

Alternate No. 4B.

1.4.2.2 Performance Test

Conduct after approval of visual aspects has been obtained. Finished work shall match approved mock-up.

1.4.2.3 Approved Mock-Up

After completion and approval of test results approved in-place mock-up shall remain as part of the work and shall be used for reference during construction.

1.4.3 Factory Tests

Perform the following tests except that where a curtain wall system or component of similar type, size, and design as specified for this project has been previously tested, under the conditions specified herein, the resulting test reports may be submitted in lieu of testing the components listed below:

a. Deflections and Structural tests.

1.4.3.1 Deflection and Structural Tests

No curtain wall framing member shall deflect, in a direction normal to the plane of the wall, more than 1/175 of its clear span or 3/4 inch, whichever is less, when tested in accordance with ASTM E 330, except that when a plastered surface will be affected the deflection shall not exceed 1/360 of the span. No framing member shall have a permanent deformation in excess of 0.2 percent of its clear span when tested in accordance with ASTM E 330 for a minimum test period of 10 seconds at 1.5 times the design wind pressures specified.

1.4.3.2 Water Penetration Test

No water penetration shall occur when the wall is tested in accordance with ASTM E 331 at a differential static test pressure of 20 percent of the inward acting design wind pressure as specified, but not less than 4 psf.

Make provision in the wall construction for adequate drainage to the outside of water leakage or condensation that occurs within the outer face of the wall. Leave drainage and weep openings in members and wall open during test.

1.4.3.3 Air Infiltration Test

Air infiltration through the wall, when tested in accordance with ASTM E 283, shall not exceed 0.06 cfm per square foot of fixed wall area, plus the permissible allowance specified for operable windows within the test area.

1.4.3.4 Thermal Conductance Tests

The thermal transmittance of opaque panels shall not exceed specified U-value, when tested in accordance with ASTM C 236. The average calculated thermal transmittance of the complete wall assembly including panels, windows, and all other components shall not exceed a U-value of 0.49.

Determine U-values of components in accordance with ASTM C 236.

SECTION 08900 Page 5

1.4.3.5 Fire Resistance Tests

Insulation provided in the curtain wall system or field applied in conjunction with the curtain wall system shall have a flame spread rating not exceeding 75 and a smoke developed rating not exceeding 150 when tested in accordance with ASTM E 84, except as specified otherwise herein.

a. Insulation: Insulation contained entirely within panel assemblies which meets the flame spread and smoke developed ratings of 75 and 150 respectively is not required to comply with the flame spread and smoke developed ratings specified.

b. Curtain Wall Systems: Material for firestopping the opening between the edge of the floor slab and back of the curtain wall system, shall have not less than the flame spread and smoke developed ratings specified for insulation which is neither isolated from the building interior nor encased in masonry cores.

c. Firestopping Materials and Devices: Firestopping material and attachment devices shall be an effective barrier against the spread of fire, smoke, and gases for a period of 1 hour when exposed to the conditions of the standard ASTM E 119 time-temperature curve for a period equivalent to the fire rating of the floor system and shall also be rated noncombustible when tested in accordance with ASTM E 136.

1.5 GLAZED CURTAIN WALL SYSTEM REQUIREMENTS

Provide framing, mullions, trim, panels, glass, glazing, sealants, insulation, fasteners, anchors, accessories, concealed auxiliary members, and attachment devices for modification of the existing curtain wall under the Base Bid and securing the components to the existing structural back-up for Additive Bid Alternates No. 4A and 4B, as specified or indicated.

1.5.1 Source

Curtain wall system components shall be furnished by one manufacturer or fabricator; however, all components need not be products of the same manufacturer.

1.5.2 Design

1.5.2.1 Base Bid

Stick system and veneer curtain wall system with mullions and single pane spandrel glass panels. Fully coordinate system accessories directly incorporated, and adjacent to contiguous related work and insure materials compatibility, deflection limitations, thermal movements, and clearances and tolerances as indicated or specified.

1.5.2.2 Additive Bid Alternates No. 4A and 4B

Stick System and veneer curtain wall system with mullions, horizontal rails, insulated vision glass, insulated spandrel glass, and single pane spandrel glass panels. Fully coordinate system accessories directly incorporated, and adjacent to contiguous related work and insure materials compatibility, deflection limitations, thermal movement, and clearances and tolerances as indicated or specified.

SECTION 08900 Page 6

1.5.3 Thermal Movement

Fabricate, assemble, and erect system with adequate allowances for expansion and contraction of components and fastenings to prevent buckling damage, joint seal failure, glass breakage, undue stress on fastenings or other detrimental effects. For design purposes, base provisions for thermal movement on assumed ambient temperature range of from -10 degrees F to 110 degrees F.

1.5.4 Tolerances

Design and erect wall system to accommodate tolerances in building frame and other contiguous work as indicated or specified. Provide with the following tolerances:

a. Maximum variation from plane or location shown on approved shop drawings: 1/8 inch per 12 feet of length up to not more than 1/2 inch in any total length.

b. For Additive Bid Alternates No. 4A and 4B, the maximum offset from true alignment between two identical members abutting end to end in line: 1/16 inch.

1.5.5 Structural Requirements

No member shall deflect in a direction parallel to the plane of the wall, when carrying its full design load, more than an amount which will reduce the edge cover or glass bite below 75 percent of the design dimension. No member after deflection under full design load, shall have a clearance between itself and the top of the panel, glass, or other part immediately below it less than 1/8 inch; the clearance between the member and an operable window or door shall be minimum 1/16 inch. Design entire system to withstand the indicated wind and concentrated loads, and the following wind loads acting normal to the plane of the wall:

a. On all stories above grade 20 psf acting inward, and the same load acting outward.

b. On corner areas, extending 12 feet from the building corners on the all stories, on all facades, the outward-acting (negative) design load shall be increased to 25 pounds per square foot.

1.6 QUALIFICATION OF WELDERS

Welding shall be performed by certified welders qualified in accordance with AWS D1.1/D1.1M using procedures, materials, and equipment of the type required for the work.

1.7 DELIVERY AND STORAGE

Inspect materials delivered to the site for damage; unload and store with a minimum of handling in accordance with recommendations contained in AAMA CW-10. Storage spaces shall be dry locations with adequate ventilation, free from heavy dust, not subject to combustion products or sources of water, and shall permit easy access for inspection and handling.

Deliver calking and sealing compounds to the job site in sealed containers labeled to show the designated name, formula or specifications number; lot number; color; date of manufacturer; shelf life; and curing time when applicable.

SECTION 08900 Page 7

1.7.1 Protective Covering

Prior to shipment from the factory, place knocked-down lineal members in cardboard containers and cover finished surfaces of aluminum with protective covering of adhesive paper, waterproof tape, or strippable plastic. Covering shall not chip, peel, or flake due to temperature or weather, shall protect against discoloration and surface damage from transportation, and storage, and shall be resistant to alkaline mortar and plaster. Do not cover aluminum surfaces that will be in contact with sealants after installation.

1.7.2 Identification

Prior to delivery, mark wall components to correspond with shop and erection drawings placement location and erection.

1.8 PROJECT CONDITIONS

Field Measurements: Verify actual dimensions of existing curtain wall system, openings, and curtain wall system components to receive new glazing, intermediate mullions, and louvers by field measurements before fabrication and indicate measurements on Shop Drawings.

PART 2 PRODUCTS

2.1 MANUFACTURERS

Basis-of-Design Product: The design for glazed aluminum curtain wall and veneer curtain-wall systems is based on the existing low profile veneer curtain wall system components for Base Bid and on EFCO Corporation 5600 Curtain Wall System and low profile veneer curtain wall system components for Additive Bid Alternates No. 4A and 4B. Subject to compliance with requirements, including existing 2 inch wide sight line and low profile exterior trim for new intermediate curtain wall system mullions to be installed, provide the named product or a comparable products by one of the following:

a. EFCO Corporation.

b. Advanced Building Systems, Inc.

c. Arch Aluminum & Glass Co., Inc.

d. Bruce Wall Systems Corp.

e. CMI Architectural Products, Inc.

f. Harmon Glass Co.

g. Kawneer.

h. Regal Manufacturing Co.

i. Tubelite, Inc.

j. United States Aluminum.

k. Vistawall Architectural Products.

l. Waltek & Company Limited.

m. Wausau Window and Wall Systems.

n. YKK AP America, Inc.

2.2 MATERIALS

2.2.1 Aluminum

Shall be free from defects impairing strength or durability of surface finish. Standard alloys shall conform to standards and designations of

SECTION 08900 Page 8

AA ASD1. Special alloys, not covered by the following ASTM specifications, shall conform to standards and designations recommended by the manufacturer for the purpose intended.

2.2.1.1 Wrought Aluminum Alloys

Shall be those which include aluminum alloying elements not exceeding the following maximum limits when tested and additional in accordance with ASTM E 34. These limits apply to both bare products and the core of clad products. The cladding of clad products shall be within the same limits except that the maximum zinc limit may be 2.5 percent in order to assure that the cladding is anodic to the core. Special wrought alloys with a silicon content not more than 7.0 percent will be acceptable for limited structural uses where special appearance is required:

ALLOY PERCENT

Silicon 1.5

Magnesium, Manganese, and Chromium combined 6.0

Iron 1.0

Copper 0.4

Zinc 1.0

Within the chemical composition limits set forth above, wrought aluminum alloys shall conform to the following:

a. Extruded bars, rods, shapes and tubes: ASTM B 221.

b. Sheet and Plate: ASTM B 209.

2.2.1.2 Cast Aluminum Alloys

Provide those in which the alloying elements are silicon, magnesium, manganese, or a combination of these. Other elements shall not exceed the following limits:

ELEMENT PERCENT

Iron 1.2

Copper 0.4

Nickel 0.4

Titanium 0.2

Others (total) 0.5

Within the chemical composition limits set forth above, cast aluminum alloys shall conform to the following:

a. Sand castings: ASTM B 26/B 26M.

b. Die casting: ASTM B 85.

SECTION 08900 Page 9

c. Permanent mold castings: ASTM B 108.

2.2.1.3 Welding Rods and Electrodes

Welding rods and bare electrodes shall conform to AWS A5.10/A5.10M as recommended by the manufacturer of the aluminum base metal alloy being used.

2.2.1.4 Finish

Anodized finish on aluminum surfaces shall match in appearance or fall within the two extremes of color range of the approved samples. The following designation of finishes refer to standard finishes as defined in the NAAMM MFM. Aluminum used for framing shall have a color anodized finish designation AA-M12C22A32/A34 and AA-M12C22A42/A44, meeting the requirements of AAMA 611.

a. Sample colors shall be selected from full range of industry colors and color densities to match…