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Home My WebLink AboutWTR-27-4102 Addendum No. 1 Maplewood WTP Roof Replacement ADDENDUM NO. 1 WTR-27-4102 Addendum No. 1\ Page 1 of 2 July 21, 2021 MAPLEWOOD WATER TREATMENT PLANT ROOF REPLACEMENT Project No. WTR-27-4102 ADDENDUM No. 1 Date of Addendum Issue: July 21, 2021 Due Date for Bids: 2:00 pm on August 3, 2021 (no change) Date of Bid Opening: 3:00 pm on August 3, 2021 (no change) To: ALL PLAN HOLDERS AND/OR PROSPECTIVE BIDDERS The following changes, additions, and/or deletions are hereby made a part of the project bid documents for the Maplewood Water Treatment Plant Roof Replacement Project and shall have the same effect as if set forth therein. Bidders shall acknowledge receipt and acceptance of this Addendum No. 1 by signing this addendum and submitting with the bid. Failure to acknowledge receipt of this Addendum may result in your bid proposal being disqualified. TECHNICAL SPECIFICATIONS 1. DELETE Technical Specification Section 11 81 29 FALL PROTECTION and REPLACE with the revised Technical Specification Section 11 81 29 FALL PROTECTION included as an attachment to this addendum. NOTE: The changes shown in the attachment are presented in “Tracked Changes” for the convenience of the Bidders. All text in “strikethrough” format is to be deleted and is not a part of the revision. This Addendum consists of two (2) pages and has one (1) attachment totaling six (6) pages (addendum and attachments). ALL OTHER REQUIREMENTS OF THE CONTRACT DOCUMENTS REMAIN IN EFFECT Maplewood WTP Roof Replacement ADDENDUM NO. 1 WTR-27-4102 Addendum No. 1\ Page 2 of 2 July 21, 2021 Sincerely, Michael Mitchell, P.E. Civil Engineer III (Project Manager) City of Renton All Bidders must sign this Addendum No. 1 in the space provided below and attach the signed Addendum No. 1 to the Formal Bid Proposal. Signature: __________________________________ Title:_______________________ Company: __________________________________ Date:_______________________ MAPLEWOOD WATER TREATMENT PLANT ROOF REPLACEMENT FALL PROTECTION 11 81 29 - 1 SECTION 11 81 29 FALL PROTECTION PART 1 - GENERAL 1.1 SUMMARY A. Section includes fall protection equipment including delegated design. 1.2 REFERENCES A. ANSI/IWCA 1-14.1: Window Cleaning Safety Standard. B.A. ANSI/ASSE Z359: Safety Requirements for Fall Arrest Systems, Subsystems and Components. B. OSHA – Reference 29 CFR 1926 Subparts E & M, Standard Interpretation. C. OSHA 29 Appendix C: Safety and Health Regulations for personal Fall Arrest Systems. 1. Include as part of each alternate, miscellaneous devices, accessory objects, and similar items incidental to or required for a complete installation whether or notwhether or not indicated as part of alternate. 1.3 ADMINISTRATIVE REQUIREMENTS A. Coordinate with selected roofing material adjacent to anchorages. The roofing warranty shall be maintained. Flexible boots are required at roofing penetrations to allow for temporary deflection during testing and use. 1.4 SUBMITTALS A. Submit under provisions of Section 01 25 00 “Substitution Procedures and Form”. B. Product Data: Manufacturer’s data sheet on each product to be used, including: 1. Preparation instructions and recommendations. 2. Installation methods. C. Shop Drawings 1. Manufacturer's Engineering Services: Manufacturer shall provide product information in appropriate file format to facilitate the design process and incorporate system solutions into project documents. 2. Provide project specific, scaled, engineered stamped shop drawings and calculations including layout, dimensions, loading and structural requirements. Issued with Addendum No. 1July 21, 2021 MAPLEWOOD WATER TREATMENT PLANT ROOF REPLACEMENT FALL PROTECTION 11 81 29 - 2 3. Include analytical structural calculations of the connection and the supporting structure's capacity including service / fatigue design, testing, and ultimate / failure load combinations for each type of anchorage. 4. Roof plans with maintenance drop locations showing routing of temporary equipment supplied by the maintenance contractor such as ropes and counterweight beams. 5. Elevations indicating intermittent stabilization anchors. 6.4. Sections at each attachment to the primary structural system. 7.5. Details of each fastener. 8.6. Include applicable information of adjacent supporting structure. D. Certifications: 1. Include a letter certified by an engineer registered in the project's state noting that the primary structural system has adequate capacity to support the transient equipment loading when combined with the applicable dead and live loads. 2. Manufacturer Insurance Certificate(s): Include product liability specifically for suspended maintenance and fall arrest and protection equipment. 3. Installer Insurance Certificate(s): Include workmen's compensation, comprehensive general liability, and comprehensive automobile liability. PART 2 - PRODUCTS 2.1 GENERAL A. Product: 1. Acceptable Manufacturer: Subject to compliance with requirements, provide: a. Super Anchor. a.b. Rooftop Anchor. b.c. Refer to Section 01 25 00 for “Substitution Procedures and Form”. 2.2 SYSTEM DESIGN REQUIREMENTS A. Design and anchorage layout to comply with OSHA and, ANSI, IWCA, applicable state regulatory requirements, and other project requirementsrequirements, as necessary. B. Provide graphical design indicating areas of the building to be serviced. Provide complete coverage for the type of service required and service methods. C. Fall Protection Anchorages: 1. Capable of sustaining a minimum ultimate load of 5,000-pound force in any direction the load may be applied for fall arrest. Issued with Addendum No. 1July 21, 2021 MAPLEWOOD WATER TREATMENT PLANT ROOF REPLACEMENT FALL PROTECTION 11 81 29 - 3 PART 3 - EXECUTION 3.1 EXAMINATION A. Verify existing substrates match the recommendations of the manufacturer. B. Verify bearing surfaces are even, plumb, and true. Uneven bearing surfaces may lead to loosening of anchorages during load testing and rejection of anchorage. C. Do not begin installation until substrates have been properly prepared. 3.2 INSTALLATION A. Sequence and coordinate with other ongoing work, allowing appropriate notice to other trades and inspectors B. Install anchors and fasteners in strict accordance towith manufacturer requirements. C. Torque fasteners with a calibrated torque wrench in strict accordance towith manufacturer requirements. D. Fasteners shall be vibration proof through the use of permanent thread locking compound, deformed thread nuts, or damaged threads. Split ring lock washers are not acceptable without additional retention as noted. E. Coordinate installation with the Roofing Contractor and General Contractor to verify installation will result in a warrantable building envelope. F.E. Coordinate installation with the Roofing Contractor to verify installation will result in a warrantable building envelope. G.F. Coordinate installation with the General Contractor to verify installation will result in a warrantable building envelope. H.G. Prevent galvanic action and other forms of corrosion by insulating metals from direct contact with incompatible materials. 3.3 FIELD QUALITY CONTROL A. Load test, 100 percent of adhesive anchors shall be tensioned tested to an equivalent of the maximum anchor test load with a calibrated scale or calibrated hydraulic test apparatus. B. Equipment shall be initially load tested under the direct supervision of a licensed engineer in accordance with ANSI, and OSHA, and IWCA requirements. C. Each anchor shall be inspected for conformance to manufacturer requirements, building envelope, looseness, and signs of permanent deflection during load testing. Issued with Addendum No. 1July 21, 2021 MAPLEWOOD WATER TREATMENT PLANT ROOF REPLACEMENT FALL PROTECTION 11 81 29 - 4 D. OSHA and ANSI/IWCA I-14.1 require that anchors first be certified and subsequently inspected on an annual basis. Coordinate with the Owner, manufacturer and local inspectors as required to maintain compliance. END OF SECTION 11 81 29 Issued with Addendum No. 1July 21, 2021