ADDENDUM No. 1 June 24, ELEVATED WATER STORAGE TANK Charter Township of Orion

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1 ADDENDUM No. 1 June 24, 2010 ELEVATED WATER STORAGE TANK Charter Township of Orion The following changes, additions, and/or clarifications to the Contract Documents shall be incorporated in said documents and shall be allowed for in the unit price bid by the Contractor such that the unit prices indicated in the Bid Form shall represent the conditions as set forth in the Contract Documents and this addendum. The bidder shall acknowledge the receipt of this addendum on the BID FORM, Section , Page 1, of the Bid Form. Refer to for addendum, bid tab and plan holders list information. The Bidder shall also return, via facsimile, the acknowledgment sheet located on page X of this addendum. This Addendum contains 5 pages. Attachment No. 1 consisting of 5 pages Attachment No. 2 consisting of 20 pages Attachment No. 3 consisting of 8 pages Total Number of pages: 38 pages ADDITIONS AND CHANGES TO THE APPENDICES 1. Add Attachment No. 2 to Appendix A GEOTECHNICAL INVESTIGATION of the Appendices. Attachment No. 2 is included herein as part of this Addendum No. 1. ADDITIONS AND CHANGES TO THE BIDDING REQUIREMENTS 2. Section INSTRUCTIONS TO BIDDERS, page 7, Add the following: ARTICLE 23 PERMITS The following permits will be required for project construction. The Contractor is required to comply with all terms and conditions of the permit as incidental to the contract bid price and no extra compensaition will be allowed. a) MDNRE Permit for Water Supply Systems Permitting Agency: Michigan Department of Natural Resources and Environment Contact at Agency: Laura Verona Date of Application: To be submitted Individual Responsible for Acquiring the Permit: OWNER June 24, 2010 Addendum No. 1 Project No Page 1 of 5

2 b) Right-of-Way Permit Permitting Agency: Road Commission of Oakland County Permit Fee: By Township Individual Responsible for Acquiring the Permit: OWNER c) Soil Erosion & Sedimentation Control Permit Permitting Agency: Orion Township Permit Fee: By Township Individual Responsible for Acquiring the Permit: OWNER d) Building Department General Review Permitting Agency: Orion Township Permit Fee: By Township Individual Responsible for Acquiring the Permit: OWNER e) Building Department Plumbing, Mechanical and Plumbing Permits Permitting Agency: Orion Township Contact at Agency: Tom Berger, Building Official Phone Number: Permit Fee: Contact Agency Individual Responsible for Acquiring the Permit: CONTRACTOR 3. Section INSTRUCTIONS TO BIDDERS, page 7, Add the following: ARTICLE 24 ELECTRONIC FILES Electronic copies of the bidding documents have been uploaded to the OHM Bid Page under the header Add Section BID FORM. Remove and replace this section with revised Bid Form, included with this addendum as Attachment No Section AGREEMENT. Page 2, add the following note following Article 5.02.F: G. Allowance No. 6: Lump Sum Allowance for Tower Logo Painting in the amount of $20,000. ADDITIONS AND CHANGES TO THE TECHNICAL SPECIFICATIONS 7. Section METAL STAIRS. Add this specification section included as Attachment No. 3 with this addendum Section EXTERIOR AND INTERIOR PAINTING. Paragraph 2.4.A.2. Remove and replace with the following: 2. Tnemec Series 94H20/20/20 or equal has been selected as the coating standard. Paragraph 2.4.A.3. Remove and replace with the following: June 24, 2010 Addendum No. 1 Project No Page 2 of 5

3 Coat Tnemec Series Minimum D.F.T Maximum D.F.T Primer 942H mils 3.5 mils Intermediate mils 4.5 mils Topcoat 20-15BL 4.0 mils 5.0 mils TOTAL 10.0 mils 13.0 mils Paragraph 2.4.B.2. Remove and replace with the following: 2. Tnemec Series N140/66 or equal has been selected as the coating standard. Paragraph 2.4.B.3. Remove and replace with the following: Coat Tnemec Series Minimum D.F.T Maximum D.F.T Primer N mils 5.0 mils Topcoat 20-16BL 4.0 mils 6.0 mils TOTAL 7.0 mils 10.0 mils* * The total minimums add, but the maximums do not. The maximum cannot be achieved on every coat. Paragraph 2.4.C.2. Remove and replace with the following: 3. Tnemec Series 94H20/66/74/1074U or equal has been selected as the coating standard. Paragraph 2.4.C.3. Remove and replace with the following: Coat Tnemec Series Minimum D.F.T Maximum D.F.T Primer 942H mils 3.5 mils Intermediate mils 3.0 mils First Topcoat mils 3.0 mils Second Topcoat 1074U 2.0 mils 3.0 mils TOTAL 8.5 mils 12.5 mils* * The total minimums add, but the maximums do not. The maximum cannot be achieved on every coat. 10. Section HEAT TRACING FOR PIPING, Remove and replace item 2.4 with the following: June 24, 2010 Addendum No. 1 Project No Page 3 of 5

4 2.4 INSULATION A. Urethane Rigid Cellular Insulation: 1. Manufacturers: a. Dow Chemical Trymer 1800 b. General Plastics c. or as approved 2. Insulation: Rigid Urethane, Rigid. Non-combustible. a. K-Value: ASTM C518, 0.19 at 75 degrees F. b. Minimum Service Temperature: -20 degrees F. c. Maximum Service Temperature: 850 degrees F. d. Maximum Moisture Absorption: Less than 0.7 percent by volume. 11. Section COMPOSITE ELEVATED WATER STORAGE TANK, Revise the following: Under Item 2.5.B. delete except that plate used as a membrane over the structural concrete floor shall have a minimum thickness of 3/16 in. Under Item 2.6.I. remove and replace this paragraph with the following: A 42-inch high roof handrail shall be provided to enclose all centrally located roof accessories. The diameter of the roof railing shall be 25 feet. ADDITIONS AND CHANGES TO THE DRAWINGS 12. Sheet C-2. Tank Overflow and Inlet Box, Plan and Section A. Revise the following: Revise the Overflow pipe and 45 degree bend from 18 to 12. Delete references to Flap Valve and replace with Tideflex Model 35-1 Valve. 13. Sheet C-4. Make the following modifications: Note that the Overflow Drain Pipe is 27-inch Class IV RCP per detail shown on Sheet C- 2. Under Notes, add the following: 5. The existing 24-inch water main is pre-stressed concrete pipe. 14. Sheet P-2. On the SECTION view, revise diameter of reinforced concrete support wall from to 52 to 60. June 24, 2010 Addendum No. 1 Project No Page 4 of 5

5 ACKNOWLEDGEMENT of RECEIPT OF ADDENDUM ATTENTION: Please complete this form and return immediately by facsimile to Orchard, Hiltz & McCliment, Inc. at Our firm: has received from Orchard, Hiltz, & McCliment, Inc. Addendum No. 1 for: Elevated Water Storage Tank Charter Township of Orion, Michigan Today, (date) at (time) a.m. / p.m. (circle one) Signature of receiver: Printed name of receiver: Company name: June 24, 2010 Addendum No. 1 Project No Page 5 of 5

6 BID FORM CHARTER TOWNSHIP OF ORION ELEVATED WATER STORAGE TANK OHM Project # Charter Township of Orion 2525 Joslyn Road Lake Orion, MI ARTICLE 1 BID RECIPIENT 1.01 This Bid is submitted to: Charter Township of Orion, 2525 Joslyn Road, Lake Orion, MI The undersigned Bidder proposes and agrees, if this Bid is accepted, to enter into an Agreement with Owner in the form included in the Bidding Documents to perform all Work as specified or indicated in the Bidding Documents for the prices and within the times indicated in this Bid and in accordance with the other terms and conditions of the Bidding Documents. ARTICLE 2 BIDDER S ACKNOWLEDGEMENTS 2.01 Bidder accepts all of the terms and conditions of the Instructions to Bidders, including without limitation those dealing with the disposition of Bid security. This Bid will remain subject to acceptance for 60 days after the Bid opening, or for such longer period of time that Bidder may agree to in writing upon request of Owner. ARTICLE 3 BIDDER S REPRESENTATIONS 3.01 In submitting this Bid, Bidder represents that: A. Bidder has examined and carefully studied the Bidding Documents, the other related data identified in the Bidding Documents, and the following Addenda, receipt of which is hereby acknowledged. Addendum No. Addendum Date B. Bidder has visited the Site and become familiar with and is satisfied as to the general, local and Site conditions that may affect cost, progress, and performance of the Work. C. Bidder is familiar with and is satisfied as to all federal, state and local Laws and Regulations that may affect cost, progress and performance of the Work. D. Bidder has carefully studied all: (1) reports of explorations and tests of subsurface conditions at or contiguous to the Site and all drawings of physical conditions in or relating to existing surface or subsurface structures at or contiguous to the Site (except Underground Facilities) which have BID FORM Page 1 of 5 OHM Project # Elevated Water Storage Tank 06/24/10 Attachment No. 1 Addendum No. 1

7 been identified in SC-4.02, and (2) reports and drawings of Hazardous Environmental Conditions that have been identified in SC E. Bidder has obtained and carefully studied (or accepts the consequences for not doing so) all additional or supplementary examinations, investigations, explorations, tests, studies and data concerning conditions (surface, subsurface and Underground Facilities) at or contiguous to the Site which may affect cost, progress, or performance of the Work or which relate to any aspect of the means, methods, techniques, sequences, and procedures of construction to be employed by Bidder, including applying the specific means, methods, techniques, sequences, and procedures of construction expressly required by the Bidding Documents to be employed by Bidder, and safety precautions and programs incident thereto. F. Bidder does not consider that any further examinations, investigations, explorations, tests, studies, or data are necessary for the determination of this Bid for performance of the Work at the price(s) bid and within the times and in accordance with the other terms and conditions of the Bidding Documents. G. Bidder is aware of the general nature of work to be performed by Owner and others at the Site that relates to the Work as indicated in the Bidding Documents. H. Bidder has correlated the information known to Bidder, information and observations obtained from visits to the Site, reports and drawings identified in the Bidding Documents, and all additional examinations, investigations, explorations, tests, studies, and data with the Bidding Documents. I. Bidder has given Engineer written notice of all conflicts, errors, ambiguities, or discrepancies that Bidder has discovered in the Bidding Documents, and the written resolution thereof by Engineer is acceptable to Bidder. J. The Bidding Documents are generally sufficient to indicate and convey understanding of all terms and conditions for the performance of the Work for which this Bid is submitted. K. Bidder will submit written evidence of its authority to do business in the state where the Project is located not later than the date of its execution of the Agreement. ARTICLE 4 FURTHER REPRESENTATIONS 4.01 Bidder further represents that: A. this Bid is genuine and not made in the interest of or on behalf of any undisclosed individual or entity and is not submitted in conformity with any agreement or rules of any group, association, organization or corporation; B. Bidder has not directly or indirectly induced or solicited any other Bidder to submit a false or sham Bid; C. Bidder has not solicited or induced any individual or entity to refrain from bidding; and D. Bidder has not sought by collusion to obtain for itself any advantage over any other Bidder or over Owner. BID FORM Page 2 of 5 OHM Project # Elevated Water Storage Tank 06/24/10 Attachment No. 1 Addendum No. 1

8 ARTICLE 5 BASIS OF BID 5.01 Bidder will complete the Work in accordance with the Contract Documents for the following price(s): Lump Sum ($ ) Base Bid Price (words) (numerals) All specified cash allowances are included in the price(s) set forth above and have been computed in accordance with Paragraph of the General Conditions. Cash allowances included in the Bid Price are listed below: A. Allowance No. 1: Lump Sum Allowance for Gas Service in the amount of $10,000. B. Allowance No. 2: Lump Sum Allowance for Electrical Service in the amount of $20,000. C. Allowance No. 3 Lump Sum Allowance for Water Tower Inspection in the amount of $35,000. D. Allowance No. 4 Lump Sum Allowance for Materials Testing in the amount of $25,000. E. Allowance No.5: Lump Sum Allowance for Landscaping in the amount of $8,000. F. Allowance No. 6: Lump Sum Allowance for Tower Logo Painting in the amount of $20, Owner has identified Alternates that are desirable for the project. Bidder may elect to complete the Work in accordance with the Contract Documents for the following price(s). Alternate A (add) ($ ) Tank Upper Knuckle (words) (numerals) Alternate B (add) Alternate Access Drive (words) ($ ) (numerals) ARTICLE 6 TIME OF COMPLETION 6.01 Bidder agrees that the Work will be substantially complete and will be completed and ready for final payment in accordance with Paragraph B of the General Conditions on or before the dates or within the number of calendar days indicated in the Agreement Bidder accepts the provisions of the Agreement as to liquidated damages in the event of failure to complete the Work within the Contract Times. ARTICLE 7 ATTACHMENTS TO THIS BID 7.01 The following documents are attached to and made a condition of this Bid: A. Required Bid security in the form of Bid Bond. B. Required Bidder Qualification Statement with Supporting Data BID FORM Page 3 of 5 OHM Project # Elevated Water Storage Tank 06/24/10 Attachment No. 1 Addendum No. 1

9 ARTICLE 8 DEFINED TERMS 8.01 The terms used in this Bid with initial capital letters have the meanings stated in the Instructions to Bidders, the General Conditions, and the Supplementary Conditions. ARTICLE 9 BID SUBMITTAL 9.01 This Bid submitted by: If Bidder is: An Individual A Partnership A Corporation A Joint Venture Name (typed or printed): By: (SEAL) (Individual s signature) Doing business as: Partnership Name: (SEAL) By: (Signature of general partner attach evidence of authority to sign) Name (typed or printed): Corporation Name: (SEAL) State of Incorporation: Type (General Business, Professional, Service, Limited Liability): By: (Signature attach evidence of authority to sign) Name (typed or printed): Title: (CORPORATE SEAL) Attest: (Signature of Corporate Secretary) Date of Qualification to do business in [State Where Project is Located] is \ \. Name of Joint Venturer: First Joint Venturer Name: (SEAL) BID FORM Page 4 of 5 OHM Project # Elevated Water Storage Tank 06/24/10 Attachment No. 1 Addendum No. 1

10 By: (Signature of first joint venture partner attach evidence of authority to sign) Name (typed or printed): Title: Second Joint Venturer Name: (SEAL) By: (Signature of second joint venture partner attach evidence of authority to sign) Name (typed or printed): Title: (Each joint venturer must sign. The manner of signing for each individual, partnership, and corporation that is a party to the joint venture should be in the manner indicated above.) Bidder s Business address: Phone: Facsimile: Submitted on, 20. State Contractor License No.. (If applicable) BID FORM Page 5 of 5 OHM Project # Elevated Water Storage Tank 06/24/10 Attachment No. 1 Addendum No. 1

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31 SECTION METAL STAIRS PART 1 - GENERAL 1.1 SUMMARY A. Section Includes: 1. Industrial-type stairs with steel grating treads. 2. Steel tube railings attached to metal stairs. 1.2 PERFORMANCE REQUIREMENTS A. Delegated Design: Design metal stairs, including comprehensive engineering analysis by a qualified professional engineer, using performance requirements and design criteria indicated. B. Structural Performance of Stairs: Metal stairs shall withstand the effects of gravity loads and the following loads and stresses within limits and under conditions indicated. 1. Uniform Load: 100 lbf/sq. ft. 2. Concentrated Load: 300 lbf applied on an area of 4 sq. in. 3. Uniform and concentrated loads need not be assumed to act concurrently. 4. Stair Framing: Capable of withstanding stresses resulting from railing loads in addition to loads specified above. 5. Limit deflection of treads, platforms, and framing members to L/240 or 1/4 inch, whichever is less. C. Structural Performance of Railings: Railings shall withstand the effects of gravity loads and the following loads and stresses within limits and under conditions indicated. 1. Handrails and Top Rails of Guards: a. Uniform load of 50 lbf/ ft. applied in any direction. b. Concentrated load of 200 lbf applied in any direction. c. Uniform and concentrated loads need not be assumed to act concurrently. D. Seismic Performance: Metal stairs shall withstand the effects of earthquake motions determined according to ASCE/SEI ACTION SUBMITTALS A. Product Data: For metal stairs and the following: 1. Metal floor plate treads. 2. Paint products. 3. Grout. METAL STAIRS Page 1 of 8 OHM Project # Elevated Water Storage Tank 06/24/10 ATTACHMENT NO. 3 ADDENDUM NO. 1

32 B. Shop Drawings: Include plans, elevations, sections, details, and attachments to other work. C. Samples for Initial Selection: For products involving selection of coating, texture, or design. D. Delegated-Design Submittal: For installed products indicated to comply with performance requirements and design criteria, including analysis data signed and sealed by the qualified professional engineer responsible for their preparation. 1.4 INFORMATIONAL SUBMITTALS A. Qualification Data: For qualified testing agency. B. Welding certificates. C. Product Test Reports: Based on evaluation of comprehensive tests performed by a qualified testing agency, for stairs and railings. 1. Test railings according ASTM E 894 and ASTM E QUALITY ASSURANCE A. Installer Qualifications: Fabricator of products. B. NAAMM Stair Standard: Comply with "Recommended Voluntary Minimum Standards for Fixed Metal Stairs" in NAAMM AMP 510, "Metal Stairs Manual," for class of stair designated, unless more stringent requirements are indicated. 1. Industrial-Type Stairs: Industrial class. C. Welding Qualifications: Qualify procedures and personnel according to AWS D1.1/D1.1M, "Structural Welding Code - Steel." D. Welding Qualifications: Qualify procedures and personnel according to the following: 1. AWS D1.1/D1.1M, "Structural Welding Code - Steel." 1.6 COORDINATION A. Coordinate selection of shop primers with topcoats to be applied over them. Comply with paint and coating manufacturers' written recommendations to ensure that shop primers and topcoats are compatible with one another. B. Coordinate installation of anchorages for metal stairs. 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. METAL STAIRS Page 2 of 8 OHM Project # Elevated Water Storage Tank 06/24/10 ATTACHMENT NO. 3 ADDENDUM NO. 1

33 1.7 Coordinate locations of hanger rods and struts with other work so that they will not encroach on required stair width and will be within the fire-resistance-rated stair enclosure.quality ASSURANCE PART 2 - PRODUCTS 2.1 MANUFACTURERS A. Subject to compliance with requirements, provide one of the following: 1. IKG Industries, a division of Harsco Corporation; Mebac. 2. SlipNOT Metal Safety Flooring, a W.S. Molnar company; Sl;ipNOT. 3. Engineer Approved Equivalent 2.2 METALS A. Metal Surfaces, General: Provide materials with smooth, flat surfaces unless otherwise indicated. For components exposed to view in the completed Work, provide materials without seam marks, roller marks, rolled trade names, or blemishes. B. Steel Plates, Shapes, and Bars: ASTM A 36/A 36M. C. Steel Tubing: ASTM A 500 (cold formed). D. Steel Bars for Grating Treads: ASTM A 36/A 36M or steel strip, ASTM A 1011/A 1011M or ASTM A 1018/A 1018M. E. Wire Rod for Grating Crossbars: ASTM A 510. F. Cast Iron: Either gray iron, ASTM A 48/A 48M, or malleable iron, ASTM A 47/A 47M, unless otherwise indicated. 2.3 MISCELLANEOUS MATERIALS A. Welding Rods and Bare Electrodes: Select according to AWS specifications for metal alloy welded. B. Galvanized Repair Paint: High zinc-dust-content paint complying with SSPC-Paint 20 and compatible with paints specified to be used over it. C. Bituminous Paint: Cold-applied asphalt emulsion complying with ASTM D METAL STAIRS Page 3 of 8 OHM Project # Elevated Water Storage Tank 06/24/10 ATTACHMENT NO. 3 ADDENDUM NO. 1

34 D. Nonshrink, Nonmetallic Grout: Factory-packaged, nonstaining, noncorrosive, nongaseous grout complying with ASTM C Provide grout specifically recommended by manufacturer for interior and exterior applications. 2.4 FASTENERS A. General: Provide zinc-plated fasteners with coating complying with ASTM B 633 or ASTM F 1941, Class Fe/Zn 12 for exterior use, and Class Fe/Zn 5 where built into exterior walls. Select fasteners for type, grade, and class required. B. Bolts and Nuts: Regular hexagon-head bolts, ASTM A 307, Grade A; with hex nuts, and, where indicated, flat washers. C. Anchor Bolts: ASTM F 1554, Grade 36, of dimensions indicated; with nuts, ASTM A 563 and, where indicated, flat washers. 1. Provide mechanically deposited or hot-dip, zinc-coated anchor bolts for stairs indicated to be galvanized. D. Machine Screws: ASME B E. Lag Screws: ASME B F. Plain Washers: Round, ASME B G. Lock Washers: Helical, spring type, ASME B H. Post-Installed Anchors: Torque-controlled expansion anchors OR chemical anchors capable of sustaining, 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 Interior Locations: Carbon-steel components zinc plated to comply with ASTM B 633, Class Fe/Zn 5, unless otherwise indicated. 2.5 FABRICATION, GENERAL A. Provide complete stair assemblies, including metal framing, hangers, struts, railings, clips, brackets, bearing plates, and other components necessary to support and anchor stairs and platforms on supporting structure. 1. Join components by welding unless otherwise indicated. 2. Use connections that maintain structural value of joined pieces. 3. Fabricate treads and platforms of exterior stairs so finished walking surfaces slope to drain. B. Preassembled Stairs: Assemble stairs in shop to greatest extent possible. Disassemble units only as necessary for shipping and handling limitations. Clearly mark units for reassembly and coordinated installation. METAL STAIRS Page 4 of 8 OHM Project # Elevated Water Storage Tank 06/24/10 ATTACHMENT NO. 3 ADDENDUM NO. 1

35 C. Cut, drill, and punch metals cleanly and accurately. Remove burrs and ease edges to a radius of 1-32 inch unless otherwise noted. Remove sharp or rough areas on exposed surfaces. D. Form bent-metal corners to smallest radius possible without impairing work. E. Form exposed work with accurate angels and surfaces and straight edges. F. Weld connections 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. Weld exposed corners and seams continuously unless otherwise indicated. 5. At exposed connections, finish exposed welds to comply with NOMMA's "Voluntary Joint Finish Standards" for Type 2 welds: completely sanded joint, some undercutting and pinholes okay. G. Form exposed connections with hairline joints, flush and smooth, using concealed fasteners where possible. Locate joints where least conspicuous. 2.6 STEEL-FRAMED STAIRS A. Manufacturers: Subject to compliance with requirements, provide products by one of the following: 1. Alfab, Inc. 2. American Stair, Inc. 3. Sharon Companies Ltd. (The). 4. Engineer approved equivalent. B. Stair Framing: 1. Fabricate stringers of steel channels. 2. Construct platforms of steel channel headers and miscellaneous framing members as needed to comply with performance requirements. 3. Weld stringers to headers; weld framing members to stringers and headers. C. Metal Bar-Grating Stairs: Comply with NAAMM MBG 531, "Metal Bar Grating Manual." 1. Fabricate treads and platforms from welded steel grating with 1-1/4-by-3/16-inch bearing bars at 15/16 inch and crossbars at 4 inches o.c. 2. Fabricate treads and platforms from welded steel grating with openings no more than 5/16 inch in least dimension. 3. Surface: Serrated 4. Finish: Galvanized 5. Fabricate grating treads with rolled-steel floor plate nosing and with steel angle or steel plate carrier at each end for stringer connections. Secure treads to stringers with bolts. METAL STAIRS Page 5 of 8 OHM Project # Elevated Water Storage Tank 06/24/10 ATTACHMENT NO. 3 ADDENDUM NO. 1

36 6. Fabricate grating platforms with nosing matching that on grating treads. Provide toeplates at open-sided edges of grating platforms. Weld grating to platform framing. 2.7 STAIR RAILINGS A. General 1. Fabricate newels of square steel tubing and provide newel caps of pressed steel as shown. 2. Rails may be bent at corners, rail returns, and wall returns, instead of using prefabricated fittings. 3. Connect posts to stair framing by direct welding unless otherwise indicated. B. Steel Tube Railings: Fabricate railings to comply with requirements indicated for design, dimensions, details, finish, and member sizes, including wall thickness of tube, post spacings, and anchorage, but not less than that needed to withstand indicated loads. 1. Rails and Posts: 1-5/8-inch diameter top and bottom rails and 1-1/2-inch square posts. C. Welded Connections: Fabricate railings with welded connections. Cope components at connections to provide close fit, or use fittings designed for this purpose. Weld all around at connections, including at fittings. 1. Finish welds to comply with NOMMA's "Voluntary Joint Finish Standards" for Type 2 welds: completely sanded joint, some undercutting and pinholes okay. D. Form changes in direction of railings as follows: 1. As detailed. 2. By bending or by inserting prefabricated elbow fittings. E. Form simple and compound curves by bending members in jigs to produce uniform curvature for each repetitive configuration required; maintain cross section of member throughout entire bend without buckling, twisting, cracking, or otherwise deforming exposed surfaces of components. F. Close exposed ends of railing members with prefabricated end fittings. G. Provide wall returns at ends of wall-mounted handrails unless otherwise indicated. Close ends of returns unless clearance between end of rail and wall is 1/4 inch or less. H. Brackets, Flanges, Fittings, and Anchors: Provide wall brackets, end closures, flanges, miscellaneous fittings, and anchors for interconnecting components and for attaching to other work. Furnish inserts and other anchorage devices for connecting to concrete or masonry work. 1. Connect posts to stair framing by direct welding unless otherwise indicated. METAL STAIRS Page 6 of 8 OHM Project # Elevated Water Storage Tank 06/24/10 ATTACHMENT NO. 3 ADDENDUM NO. 1

37 2. For galvanized railings, provide galvanized fittings, brackets, fasteners, sleeves, and other ferrous-metal components. I. Fillers: Provide fillers made from steel plate, or other suitably crush-resistant material, where needed to transfer wall bracket loads through wall finishes to structural supports. Size fillers to suit wall finish thicknesses and to produce adequate bearing area to prevent bracket rotation and overstressing of substrate. 2.8 FINISHES A. Comply with NAAMM's "Metal Finishes Manual for Architectural and Metal Products" for recommendations for applying and designating finishes. B. Galvanizing: Hot-dip galvanize items as indicated to comply with ASTM A 153/A 153M for steel and iron hardware and with ASTM A 123/A 123M for other steel and iron products. PART 3 - EXECUTION 3.1 INSTALLATION A. Fastening to In-Place Construction: Provide anchorage devices and fasteners where necessary for securing metal stairs to in-place construction. Include threaded fasteners for concrete and masonry inserts, through-bolts, lag bolts, and other connectors. B. Cutting, Fitting, and Placement: Perform cutting, drilling, and fitting required for installing metal stairs. Set units accurately in location, alignment, and elevation, measured from established lines and levels and free of rack. C. Install metal stairs by welding stair framing to steel structure or to weld plates cast into concrete unless otherwise indicated. D. Provide temporary bracing or anchors in formwork for items that are to be built into concrete, masonry, or similar construction. E. 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. F. Field Welding: Comply with requirements for welding in "Fabrication, General" Article. 3.2 INSTALLING METAL STAIRS WITH GROUTED BASEPLATES A. Clean concrete and masonry bearing surfaces of bond-reducing materials, and roughen to improve bond to surfaces. Clean bottom surface of baseplates. METAL STAIRS Page 7 of 8 OHM Project # Elevated Water Storage Tank 06/24/10 ATTACHMENT NO. 3 ADDENDUM NO. 1

38 B. Set steel stair baseplates on wedges, shims, or leveling nuts. After stairs have been positioned and aligned, tighten anchor bolts. Do not remove wedges or shims but, if protruding, cut off flush with edge of bearing plate before packing with grout. 1. Use nonmetallic, nonshrink grout unless otherwise indicated. 2. Pack grout solidly between bearing surfaces and plates to ensure that no voids remain. 3.3 INSTALLING RAILINGS A. Adjust railing systems before anchoring to ensure matching alignment at abutting joints. Space posts at spacing indicated or, if not indicated, as required by design loads. Plumb posts in each direction. Secure posts and rail ends to building construction as follows: 1. Anchor posts to steel by welding directly to steel supporting members. 2. Anchor handrail ends to concrete and masonry with steel round flanges welded to rail ends and anchored with postinstalled anchors and bolts. 3.4 ADJUSTING AND CLEANING A. Galvanized Surfaces: Clean field welds, bolted connections, and abraded areas and repair galvanizing to comply with ASTM A 780. END OF SECTION METAL STAIRS Page 8 of 8 OHM Project # Elevated Water Storage Tank 06/24/10 ATTACHMENT NO. 3 ADDENDUM NO. 1