20190219_Amendment_03.pdf

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 or (c) By separate letter or electronic communication 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 DATE 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 letter or electronic communication, provided each letter or electronic communication makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

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

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT 1. CONTRACT ID CODE

2. AMENDMENT/MODIFICATION NUMBER 3. EFFECTIVE DATE 4. REQUISITION/PURCHASE REQUISITION NUMBER 5. PROJECT NUMBER (If applicable)

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

STANDARD FORM 30 (REV. 11/2016)

Prescribed by GSA FAR (48 CFR) 53.243

FACILITY CODE

9A. AMENDMENT OF SOLICITATION NUMBER

9B. DATED (SEE ITEM 11)

10A. MODIFICATION OF CONTRACT/ORDER NUMBER

10B. DATED (SEE ITEM 13)

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.

12. ACCOUNTING AND APPROPRIATION DATA (If required) copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

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

IT MODIFIES THE CONTRACT/ORDER NUMBER AS DESCRIBED IN ITEM 14.

CHECK ONE A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE CONTRACT ORDER

NUMBER IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation data, 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)

Except as 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.

15C. DATE SIGNED

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

16C. DATE SIGNED

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

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

PAGE OF PAGES

6. ISSUED BY CODE

8. NAME AND ADDRESS OF CONTRACTOR (Number, street, county, State and ZIP Code) (X)

CODE

15B. CONTRACTOR/OFFEROR

(Signature of person authorized to sign)

16B. UNITED STATES OF AMERICA

(Signature of Contracting Officer)

Previous edition unusable

5P1QCC

AMENDMENT 03 to RFP 47PF00-19R-0017 for the Upper Roof Replacement Project at the John W. Peck Federal Building in Cincinnati, OH.

AMENDMENT 03 is being issued to incorporate Addendum No. 3 and all associated attachments, dated 2/18/19, and to provide answers to the attached RFI's. Continued on next page...

5P1QCC

GSA PBS, AMD Southern Contracting Branch S. Illinois/Indiana Contracting Team- Indianapolis 8899 E 56th St. Room: Column 123B Indianapolis, IN 46216-1000

GSA PBS, AMD Southern Contracting Branch S. Illinois/Indiana Contracting Team- Indianapolis 8899 E 56th St. Room: Column 123B Indianapolis, IN 46216-1000

RFP 47PF00-19R-0017

1 20

02/19/2019

01/02/2019

AMENDMENT 03 to RFP 47PF00-19R-0017 for the Upper Roof Replacement Project at the John W. Peck Federal Building in Cincinnati, OH.

Box 14 Continued…

Q1. Can we get a copy of existing structural drawings and exterior elevations? These would help in development of the logistic plan.

A1.Yes. Drawings issued as part of Addendum 03.

Q2. What are the GSA security requirements for buck hoist?

A2. Unknown at this time.

Q3. Is hot work permit needed for torch down modified bitumen roofing?

A3. The systems specified are all cold applied systems.

Q4. Are there any existing warranties of existing roofing system to maintain?

A4. All warranties on the penthouse roof have expired. The warranty on the lower roof is still in effect and should be maintained.

Q5. Who is the manufacturer for the lower roof?

A5. Tremco is the manufacturer for both lower and upper roofs.

Q6. Who was the installer of the lower roof?

A6. The installer is unknown at this time.

Q7. Who is the certificate holder for the lighting protection system?

A7. The certificate holder is unknown at this time.

Q8. Please confirm note 7, sheet A101, new walkway - please provide a specification for this item.

A8. Walkways are specified in each roof system section.

Q9. Please clarify the ladders; detail on 3/A162 calls for guard and specification 05500-62.7B call for chains A9. See reissued Section 055000 and reissued Sheet A162 in Addendum 03.

Q10. Please confirm if the existing cast iron is “no-hub,” or “hub & spigot cast iron?” Also please confirm if a section of the existing cast iron piping is to be replaced, will “no-hub,” be acceptable?

A10. The existing cast iron appears to be “hub and spigot”. “No hub” cast iron will be acceptable with transition connector where required.

Q11. What is the “pipe size” of the existing roof drains? What size is the pipe they are connecting to?

A11. The contractor is to field verify conditions, dimensions, etc. and base their bids on field verified conditions.

Q12. In the replacement of the existing roof drains, how much, if any of the pipe below is to be replaced?

A12. 6’-0”.

Q13. Please confirm the sketch below is what the A/E is envisioning as the design intent for the routing of the new cast iron drainage lines. Proposed drain routing:

A13. The sketch above is the design intent subject to existing field conditions.

Q14. Do we run the overflow pipe straight out the closest wall under the roof to “proposed cow’s tongue,” or scupper, and the rain simply falls onto that roof?

A14. That is the design intent. Final layout to be coordinated with existing conditions.

Q15. Assuming the overflow pipe goes through the walls, how far down from the roof do they want these?

A15. The overflow pipe should be approximately the same distance above the floor as the roof drain pipes.

Q16. Assuming the overflow pipe goes through the walls, is there any abatement associated with the walls?

A16. No abatement within the exterior walls is anticipated.

Q17. Does the overflow piping get insulated like the existing roof drain piping? If so, what is the insulation specification?

A17. The overflow piping should be treated like the piping for the roof drains.

Q18. The solicitation states under terms and conditions, contractor responsibilities the following regarding the possibility of needing to provide design professionals”

“The Contractor shall be responsible for providing professional design services in connection with performance of the Work or portions of the Work only if this responsibility is expressly stated and the Contract Documents provide the performance and design criteria that such services will be required to satisfy. In the performance of such work, the Contractor shall be responsible for retaining licensed design professionals, who shall sign and seal all drawings, calculations, specifications and other submittals that the licensed professional prepares. The Contractor shall be responsible for, and GSA shall be entitled to rely upon, the adequacy and completeness of all professional design services provided under this Contract.”

Can you please confirm exactly if the contractor must provide any design documents and/or drawings from an architect or engineer, for any aspect of the project, either with or without A/E stamps?

A18. This requirement will be stated in the individual specifications section.

Q19. Can you please provide exact detail in regard to how you wish to receive redline, as-built drawings acceptable for the contractors submission?

A19. Redlines are to be submitted digitally. Submissions may be in AutoCAD or in PDF.

Redlines should be neat, legible, and easily distinguishable from the drawing lines. Redlines may be done by hand on the drawings and then scanned in.

Q20. Must redline drawings be turned in to the Government in AutoCAD?

A20. See Answer A19.

Q21. Will the contractor be able to use a copy of the drawings in possession of the Government, and Governments representative, in either PDF or AutoCAD, for redline documentation?

A21. The contractor should make all redlines on the drawing set provided in this bid package.

Q22. Section 070150.19 3.2: Outlines tear-off procedures and indicates wood/concrete decks. Also mentions ceramic tiles when discussing the deck replacement. Other areas of the design documents indicate that the deck is metal. Please confirm that ceramic tile and wood/concrete deck requirements do not apply to this project.

A22. See Addendum 03.

Q23. Please confirm the insulation requirements. It appears that the desire is for 2 layers of 2” inch flat stock insulation applied over the deck, with a tapered system installed over the 4” base layer.

A23. Roof insulation shall be R25 minimum. Insulation shall be applied over temporary roof in two (2) layers of 2.2 inch insulation with horizontal and vertical joints staggered. Tapered system to be installed over flat insulation.

Q24. Please confirm the required tapered insulation system slope. The specifications indicate a 1/8” per 12” inches tapered system, while drawing sheet G002 indicates a 1/4” inch per 12” inches tapered system.

A24. Tapered insulation in the roof field should be 1/4" per 12”.

Q25. Please confirm wind uplift requirements. Drawings have three different uplift pressures for the field, perimeter and corners. Section 075216 indicates 195psf for all three conditions.

A25. See Addendum 03.

Q26. Please provide specifics on the substrate board. No products are called out on the specification.

A26. See Addendum 03.

A revised Attachment B - Past Performance Questionnaire is attached indicating the correct deadline for the questionnaires, to correspond with the RFP.

All other terms and conditions remain unchanged.

Addendum No. 03 Page 1 of 3

ADDENDUM NO. 03

PROJECT: John Weld Peck Upper Roof Replacement PROJECT No.: C-2262

DATE: 2/18/19

PREPARED BY: Kristina Hamill

Elevar Design Group 555 Carr St.

Cincinnati, OH 45203

TO ALL BIDDERS:

This addendum supplements and amends the original Specifications and Drawings and shall be taken into account in preparing proposals and shall become a part of the Contract Documents. Bidders shall indicate receipt of the addendum in their bids.

1. SPECIFICATIONS

1.1 Section 017822 Operation & Maintenance Documentation: Add paragraph 1.3D as follows:

D. Quantity of Submittals:

1. Two (2) sets of hard copies of Operation and Maintenance Manuals.

2. One (1) set electronic copy, PDF format of Operation and Maintenance Manual.

3. One (1) set, full size, electronic as-built drawings.

1.2 Section 055000 Metal Fabrications:

A. This section has been revised and reissued with this addendum (refer to attachments).

1.3 Section 070150.19 Preparation for Re-Roofing

A. Add paragraph 2.2 as follows:

2.2 SUBSTRATE BOARDS

A. Boards: ASTM E136 and ASTM C1177, Type X gypsum board, 5/8 inch thick.

B. Delete paragraphs 3.2G, 3.2H, and 3.2I.

1.4 Section 075113B Cold Process Modified Bitumen Roofing – System B

A. For paragraph 2.03A, revise the subparagraph items as follows:

1. Thickness (avg): 118 mils (3.0mm) (ASTM D 5147)

2. Thickness (min): 114 mils (2.4mm) (ASTM D 5147)

3. Weight (min per 100 ft² of coverage): 84 lb (4.1 kg/m2)

6. Peak Load (avg) @ 73ºF (23ºC): 80 lbf/inch (14.1 kN/m) (ASTM D 5147)

7. Peak Load (avg) @ 0ºF (-18ºC): 150 lbf/inch (26.5 kN/m) (ASTM D 5147)

8. Ultimate Elongation (avg.) @ 73ºF (23ºC): 5% (ASTM D 5147)

13. Design Basis: Siplast Paradiene 20 EG

B. For paragraph 2.03B, revise the subparagraph items as follows:

7. Peak Load (avg) @ 73ºF (23ºC): 80 lbf/inch (14.1 kN/m) (ASTM D 5147)

8. Peak Load (avg) @ 0ºF (-18ºC): 150 lbf/inch (26.5 kN/m) (ASTM D 5147)

16. Design Basis: Siplast Paradiene 30 HT FR

Addendum No. 03 Page 2 of 3

1.5 Section 075113C Cold Process Modified Bitumen Roofing – System C

A. For paragraph 2.03B, revise the subparagraph items as follows:

1. Thickness: 118 mils (3.0 mm)

4. Roll weight: 88 lb (39.9 kg)

5. Net mass per unit area, lb/100 sq ft (g/sq m): 82 lb (3992 g)

6. Peak load @ 0F (-18C), lbf/in (kN/m): MD 185 lbf/in (32.5 kN/m), XMD 165 lbf/in

(28.9 kN/m)

7. Elongation at peak load @ 0F (-18C), lbf/in (kN/m): MD 6%, XMD 6%

8. Peak load @ 73.4F (23C), lbf/in (kN/m): MD 110 lbf/in (19.4 kN/m), XMD 105 lbf/in (18.5 kN/m)

9. Elongation at peak load @ 73.4F (23C), lbf/in (kN/m): MD 10%, XMD 10%

10. Ultimate Elongation @ 73.4F (23C), lbf/in (kN/m): MD 60%, XMD 45%

11. Tear Strength @ 73.4F (23C), lbf (N): MD 180 lbf (801 N), XMD 190 lbf (845 N)

13. Dimensional stability, %:MD/XMD: Less than 0.1%

16. Design Basis: Soprema Elastophene HR FR GR

B. Revise paragraph 2.04A as follows:

A. Base Flashing Ply: SBS-modified bitumen membrane with aluminum foil on top and sanded bottom. High strength glass fiber reinforcement. Meets or exceeds ASTM 6298 per ASTM D 5147 test methods:

C. For paragraph 2.04A, revise the subparagraph items as follows:

1. Thickness: 157 mils (4.0 mm)

4. Roll weight: 95 lb (43.0 kg)

5. Net mass per unit area, lb/100 sq ft (g/sq m): 88 lb (4297 g)

6. Peak load @ 0F (-18C), lbf/in (kN/m): MD 200 lbf/in (35.2 kN/m), XMD 175 lbf/in (30.8 kN/m)

7. Elongation at peak load @ 0F (-18C), lbf/in (kN/m): MD 10%, XMD 10%

8. Peak load @ 73.4F (23C), lbf/in (kN/m): MD 95 lbf/in (16.7 kN/m), XMD 95 lbf/in (16.7 kN/m)

9. Elongation at peak load @ 73.4F (23C), lbf/in (kN/m): MD 20%, XMD 20%

10. Ultimate Elongation @ 73.4F (23C), lbf/in (kN/m): MD 50%, XMD 50%

11. Tear Strength @ 73.4F (23C), lbf (N): MD 195 lbf (845 N), XMD 205 lbf (912 N)

13. Dimensional stability, %:MD/XMD: Less than 0.2%

14. Compound stability, F (C): MD/XMD: 230F (110C)

15. Design Basis: Soprema SOPRALAST 50 TV ALU SANDED

1.6 Section 075216, paragraph 1.4B. Revise as follows:

1. Corner Uplift Pressure: See wind uplift diagram on the Drawings.

2. Perimeter Uplift Pressure: See wind uplift diagram on the Drawings.

3. Field-of-Roof Uplift Pressure: See wind uplift diagram on the Drawings.

2. DRAWINGS

2.1 Sheet A162:

A. This sheet has been revised and reissued with this addendum (refer to attachments).

2.2 Sheet A202 Exterior Elevations, dated 08/09/2005.

A. For reference only (refer to attachments).

2.3 Sheet 7-10 Penthouse Framing Plan, dated 02/01/1961.

Addendum No. 03 Page 3 of 3

A. For reference only (refer to attachments).

3. ATTACHMENTS

3.1 Specifications:

A. Section 055000 Metal Fabrications - reissued.

3.2 Drawings:

A. Sheet A162 – reissued.

B. Sheet A202 Exterior Elevations, dated 08/09/2005.

C. Sheet 7-10 Penthouse Framing Plan, dated 02/01/1961.

END OF ADDENDUM

John Weld Peck Upper Roof Replacement PBS Region 5 John W. Peck Federal Building, Cincinnati, OH ROH11072

METAL FABRICATIONS

PROPERTY OF THE UNITED STATES GOVERNMENT

FOR OFFICIAL USE ONLY

Do not remove this notice

Properly destroy documents when no longer needed

055000 - 1

SECTION 055000 - METAL FABRICATIONS

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawing and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

1.2 SUMMARY

A. Section Includes:

1. Miscellaneous steel framing and supports.

2. New steel ladder.

B. Related Sections include the following:

1. Division 06 Section "Miscellaneous Rough Carpentry" for metal framing anchors.

2. Division 09 Section “Exterior/Interior Painting”.

1.3 PERFORMANCE REQUIREMENTS

A. Delegated Design: Design work platforms, including comprehensive engineering analysis by a qualified professional engineer, using performance requirements and design criteria indicated.

B. Delegated Design: Design Ladder, including comprehensive engineering analysis by a qualified professional engineer, using performance requirements and design criteria indicated.

C. Thermal Movements: Provide exterior metal fabrications that allow for thermal movements resulting from the following maximum change (range) in ambient and surface temperatures by preventing buckling, opening of joints, overstressing of components, failure of connections, and other detrimental effects. Base engineering calculation on surface temperatures of materials due to both solar heat gain and nighttime-sky heat loss.

1. Temperature Change: 120 deg F, ambient; 180 deg F, material surfaces.

1.4 SUBMITTALS

A. Shop Drawings: Show fabrication and installation details for metal fabrications.

FOR OFFICIAL USE ONLY

055000 - 2

1. Include plans, elevations, sections, and details of metal fabrications and their connections. Show anchorage and accessory items.

2. Provide templates for anchors and bolts specified for installation under other Sections.

1.5 QUALITY ASSURANCE

A. Welding: Qualify procedures and personnel according to the following:

1. AWS D1.1, "Structural Welding Code--Steel."

2. The welder working on the project must have a current welding certification from the American Welding Society and carry on his/her person a card indicating their certification is up to date must be able to produce the card upon request.

1.6 PROJECT CONDITIONS

A. Field Measurements: Verify actual locations of walls, roofs, and other construction contiguous with metal fabrications by field measurements before fabrication and indicate measurements on Shop Drawings.

1. Provide allowance for trimming and fitting at site.

1.7 COORDINATION

A. Coordinate installation of anchorages for metal fabrications. Furnish setting drawings, templates, and directions for installing anchorages, including sleeves, concrete inserts, anchor bolts, and items with integral anchors, that are to be embedded in concrete or masonry. Deliver such items to Project site in time for installation.

B. Coordinate installation of steel weld plates and angles for casting into concrete that are specified in this Section but required for work of another Section. Deliver such items to Project site in time for installation.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. In other Part 2 articles where titles below introduce lists, the following requirements apply to product selection:

1. Available Products: Subject to compliance with requirements, products that may be incorporated into the Work include, but are not limited to, products specified.

FOR OFFICIAL USE ONLY

055000 - 3

2.2 METALS, GENERAL

A. Metal Surfaces, General: Provide materials with smooth, flat surfaces unless otherwise indicated. For metal fabrications exposed to view in the completed Work, provide materials without seam marks, roller marks, rolled trade names, or blemishes.

2.3 FERROUS METALS

A. Steel Plates, Shapes, and Bars: ASTM A 36/A 36M.

B. Steel Tubing: ASTM A 500, cold-formed steel tubing.

C. Steel Pipe: ASTM A 53/A 53M, standard weight (Schedule 40), unless another weight is indicated or required by structural loads.

2.4 FASTENERS

A. General: Unless otherwise indicated, provide Type 316 stainless-steel fasteners for exterior use and zinc-plated fasteners with coating complying with ASTM B 633, Class Fe/Zn 5, at exterior walls. Provide stainless-steel fasteners for fastening aluminum. Select fasteners for type, grade, and class required.

B. Steel Bolts and Nuts: Regular hexagon-head bolts, ASTM A 307, Grade A; with hex nuts, ASTM A 563; and, where indicated, flat washers.

C. Stainless-Steel Bolts and Nuts: Regular hexagon-head annealed stainless-steel bolts, nuts and, where indicated, flat washers; ASTM F 593 for bolts and ASTM F 594 for nuts, Alloy Group 2.

D. Anchor Bolts: ASTM F 1554, Grade 36.

1. Provide hot-dip or mechanically deposited, zinc-coated anchor bolts where item being fastened is indicated to be galvanized.

E. Eyebolts: ASTM A 489.

F. Machine Screws: ASME B18.6.3.

G. Lag Bolts: ASME B18.2.1.

H. Wood Screws: Flat head, ASME B18.6.1.

I. Plain Washers: Round, ASME B18.22.1.

J. Lock Washers: Helical, spring type, ASME B18.21.1.

FOR OFFICIAL USE ONLY

055000 - 4

K. Expansion Anchors: Anchor bolt and sleeve assembly with capability to sustain, without failure, a load equal to six times the load imposed when installed in unit masonry and four times the load imposed when installed in concrete, as determined by testing according to ASTM E 488, conducted by a qualified independent testing agency.

1. Material for Anchors in Interior Locations: Carbon-steel components zinc-plated to comply with ASTM B 633, Class Fe/Zn 5.

2. Material for Anchors in Exterior Locations: Alloy Group 2 stainless-steel bolts complying with ASTM F 593 and nuts complying with ASTM F 594.

2.5 MISCELLANEOUS MATERIALS

A. Welding Rods and Bare Electrodes: Select according to AWS specifications for metal alloy welded.

B. Universal Shop Primer: Fast-curing, lead- and chromate-free, universal modified-alkyd primer complying with MPI

1. Use primer with a VOC content of 420 g/L (3.5 lb/gal.) or less when calculated according to 40 CFR 59, Subpart D (EPA Method 24).

2. Use primer containing pigments that make it easily distinguishable from zinc-rich primer.

C. Zinc-Rich Primer: Complying with SSPC-Paint 20 or SSPC-Paint 29 and compatible with topcoat.

1. Use primer with a VOC content of 420 g/L (3.5 lb/gal.) or less when calculated according to 40 CFR 59, Subpart D (EPA Method 24).

2. Available Products:

a. Benjamin Moore & Co.; Epoxy Zinc-Rich Primer CM18/19.

b. Carboline Company; Carbozinc 621.

c. ICI Devoe Coatings; Catha-Coat 313.

d. International Coatings Limited; Interzinc 315 Epoxy Zinc-Rich Primer.

e. PPG Architectural Finishes, Inc.; Aquapon Zinc-Rich Primer 97-670.

f. Sherwin-Williams Company (The); Corothane I GalvaPac Zinc Primer.

g. Tnemec Company, Inc.; Tneme-Zinc 90-97.

D. Galvanizing Repair Paint: High-zinc-dust-content paint for regalvanizing welds in steel, complying with SSPC-Paint 20.

E. Exterior Primer and Finish Coats:

1. Exterior Galvanized Metal Primer:

a. Basis of Design: PPG: 97946 SERIES PRIMER: All Weather DTR epoxy primer. Applied at a dry film thickness of not less than 6 mils.

FOR OFFICIAL USE ONLY

055000 - 5

2. Exterior Urethane Gloss 2nd and Top Coat:

a. Basis of Design: PPG Paints: 95850 Series Gloss-35: Urthane applied at a dry film thickness of not less than 4 mils.

3. Color: To be selected from manufacturer’s standard range of colors.

2.6 FABRICATION, GENERAL

A. Products: Subject to compliance with requirements, available products that may be incorporated into the Work include, but are not limited to, the following:

1. IKG Industries, a division of Harsco Corporation; Mebac.

2. SlipNOT Metal Safety Flooring, a W. S. Molnar company; SlipNOT.

B. Shop Assembly: Preassemble items in the shop to greatest extent possible.

Disassemble units only as necessary for shipping and handling limitations. Use connections that maintain structural value of joined pieces. Clearly mark units for reassembly and coordinated installation.

C. Cut, drill, and punch metals cleanly and accurately. Remove burrs and ease edges to a radius of approximately 1/32 inch, unless otherwise indicated. Remove sharp or rough areas on exposed surfaces.

D. Form bent-metal corners to smallest radius possible without causing grain separation or otherwise impairing work.

E. Form exposed work true to line and level with accurate angles and surfaces and straight edges.

F. Weld corners and seams continuously to comply with the following:

1. Use materials and methods that minimize distortion and develop strength and corrosion resistance of base metals.

2. Obtain fusion without undercut or overlap.

3. Remove welding flux immediately.

4. At exposed connections, finish exposed welds and surfaces smooth and blended so no roughness shows after finishing and contour of welded surface matches that of adjacent surface.

G. Form exposed connections with hairline joints, flush and smooth, using concealed fasteners where possible. Where exposed fasteners are required, use Phillips flat-head (countersunk) screws or bolts, unless otherwise indicated. Locate joints where least conspicuous.

H. Fabricate seams and other connections that will be exposed to weather in a manner to exclude water. Provide weep holes where water may accumulate.

I. Cut, reinforce, drill, and tap metal fabrications as indicated to receive finish hardware, screws, and similar items.

FOR OFFICIAL USE ONLY

055000 - 6

J. Provide for anchorage of type indicated; coordinate with supporting structure. Space anchoring devices to secure metal fabrications rigidly in place and to support indicated loads.

1. Where units are indicated to be cast into concrete or built into masonry, equip with integrally welded steel strap anchors, 1/8 by 1-1/2 inches, with a minimum 6-inch embedment and 2-inch hook, not less than 8 inches from ends and corners of units and 24 inches o.c., unless otherwise indicated.

2.7 METAL LADDERS

A. General:

1. Comply with ANSI A14.3, unless otherwise indicated.

B. Products: Subject to compliance with requirements, available products that may be incorporated into the Work include, but are not limited to, the following:

1. Diversified Fall Protection.

2. Fall Protection Systems.

C. Ladders:

1. Space siderails 24 inches apart unless otherwise indicated.

2. Siderails: Continuous 1/2 by 2-1/2 inch steel flat bars with eased edges.

3. Rungs: 3/4-inch-diameter steel bars.

4. Fit rungs in centerline of siderails; plug-weld and grind smooth on outer rail faces.

5. Provide nonslip surfaces on top of each rung by coating with abrasive material metallically bonded to rung.

6. Support each ladder at top and bottom and not more than 48 inches o.c. with welded or bolted steel brackets.

7. Shop prime exterior ladders, including brackets and fasteners, with zinc-rich primer. Touch up in field.

8. Field paint with exterior galvanized metal primer and exterior gloss urethane finish coats.

9. Fall protection system: Provide cable system with top bracket, bottom bracket, cable lifeline and guides, safety sleeve and all accessories. System to accommodate two operators.

2.8 MISCELLANEOUS FRAMING AND SUPPORTS

A. General: Provide steel framing and supports not specified in other Sections as needed to complete the Work.

B. Fabricate units from steel shapes, plates, and bars of welded construction unless otherwise indicated. Fabricate to sizes, shapes, and profiles indicated and as

FOR OFFICIAL USE ONLY

055000 - 7 necessary to receive adjacent construction retained by framing and supports. Cut, drill, and tap units to receive hardware, hangers, and similar items.

1. Fabricate units from slotted channel framing where indicated.

2. Furnish inserts if units are installed after concrete is placed.

C. Galvanize miscellaneous framing and supports where indicated.

D. Prime miscellaneous framing and supports with zinc-rich primer where indicated.

2.9 FINISHES, GENERAL

A. Comply with NAAMM's "Metal Finishes Manual for Architectural and Metal Products" for recommendations for applying and designating finishes.

B. Finish metal fabrications after assembly.

2.10 STEEL AND IRON FINISHES

A. Galvanizing where noted: Hot-dip galvanize items as indicated to comply with applicable standard listed below:

1. ASTM A 123/A 123M, for galvanizing steel and iron products.

2. ASTM A 153/A 153M, for galvanizing steel and iron hardware.

3. Galvanized metal to be painted in the field is not to be given chromate passivation treatment.

B. Preparation for Shop Priming: Prepare uncoated ferrous-metal surfaces to comply with minimum requirements indicated below for SSPC surface preparation specifications and environmental exposure conditions of installed metal fabrications:

1. Exterior Items: (SSPC Zone 1B) and Items Indicated to Receive Zinc-Rich Primer: SSPC-SP 6/NACE No. 3, "Commercial Blast Cleaning."

2. Interiors (SSPC Zone 1A): SSPC-SP 3, "Power Tool Cleaning."

C. Shop Priming: Apply shop primer to uncoated surfaces of metal fabrications, except those with galvanized finishes and those to be embedded in concrete, sprayed-on fireproofing, or masonry, unless otherwise indicated. Comply with SSPC-PA 1, "Paint Application Specification No. 1: Shop, Field, and Maintenance Painting of Steel," for shop painting.

1. Stripe paint corners, crevices, bolts, welds, and sharp edges.

FOR OFFICIAL USE ONLY

055000 - 8

PART 3 - EXECUTION

3.1 INSTALLATION, GENERAL

A. Cutting, Fitting, and Placement: Perform cutting, drilling, and fitting required for installing metal fabrications. Set metal fabrications accurately in location, alignment, and elevation; with edges and surfaces level, plumb, true, and free of rack; and measured from established lines and levels.

B. Fit exposed connections accurately together to form hairline joints. Weld connections that are not to be left as exposed joints but cannot be shop welded because of shipping size limitations. Do not weld, cut, or abrade surfaces of exterior units that have been hot-dip galvanized after fabrication and are for bolted or screwed field connections.

C. Field Welding: Comply with the following requirements:

1. Use materials and methods that minimize distortion and develop strength and corrosion resistance of base metals.

2. Obtain fusion without undercut or overlap.

3. Remove welding flux immediately.

4. At exposed connections, finish exposed welds and surfaces smooth and blended so no roughness shows after finishing and contour of welded surface matches that of adjacent surface.

D. Fastening to In-Place Construction: Provide anchorage devices and fasteners where metal fabrications are required to be fastened to in-place construction. Provide threaded fasteners for use with concrete and masonry inserts, toggle bolts, through bolts, lag bolts, wood screws, and other connectors.

E. Provide temporary bracing or anchors in formwork for items that are to be built into concrete, masonry, or similar construction.

3.2 ADJUSTING AND CLEANING

A. Touchup Painting: Immediately after erection, clean field welds, bolted connections, and abraded areas. Paint uncoated and abraded areas with the same material as used for shop painting to comply with SSPC-PA 1 for touching up shop-painted surfaces.

1. Apply by brush or spray to provide a minimum 2.0-mil dry film thickness.

B. Galvanized Surfaces: Clean field welds, bolted connections, and abraded areas and repair galvanizing to comply with ASTM A 780/A 780M.

C. Field Painting: Comply with the following requirements

FOR OFFICIAL USE ONLY

055000 - 9

1. Apply paint according to manufacturer’s written instructions. Use applicators and techniques best suited for substrate and type of material being applied.

2. Allow sufficient time between successive coats to permit proper drying. Do not re-coat surfaces until paint has dried to where it feels firm, and does not deform or feel sticky under moderate thumb pressure, and until application of another coat of paint does not cause undercoat to lift or lose adhesion.

3. Minimum Coating Thickness: Apply paint materials no thinner than manufacturer's recommended spreading rate to achieve dry film thickness indicated. Provide total dry film thickness of the entire system as recommended by manufacturer.

4. Protection: Protect work of other trades and existing elements, whether being painted or not, against damage from painting. Correct damage by cleaning, repairing or replacing, and repainting, as approved by Architect. Provide “Wet Paint” sign to protect newly painted finishes. After completing painting operations, remove temporary protective wrappings provided by others to protect their work. After work of other trades is complete, touch up and restore damaged or defaced painted surfaces. Comply with procedures specified in PDCA P1.

END OF SECTION 055000