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HomeMy WebLinkAboutSF ADD 1_5-6-2020CORNELL UNIVERSITY GRUMMAN HALL FIRST & SECOND FACILITIES CONTRACTS FLOOR RENOVATION – PHASE 1 121 HUMPHREYS SERVICE BUILDING ITHACA, NEW YORK 14853-3701 ADDENDUM NO. 1 May 6, 2020 This Addendum contains changes to the requirements of the Contract Documents and Specifications. Such changes are to be incorporated into the Construction Documents and shall apply to the work with the same meaning and force as if they had been included in the original document. Wherever this Addendum modifies a portion of a paragraph of the specifications or a portion of any Drawing, the remainder of the Paragraph or Drawing shall remain in force. NOTE: Provisions of all Contract Documents apply. Item 1. BID PROPOSAL CERTIFICATE FORM, Item 3., a., i. DELETE “Work shall be completed within twelve (12) weeks from the commencement…” REPLACE with “Work shall be completed within eleven (11) weeks from the commencement…” Item 2. Section 01 11 00 Summary of Work: Part 1.4.A, SCHEDULE OF OWNER FURNISHED ITEMS: DELETE “…over to the Contractor for installation with an anticipated delivery date of mid-June.” REPLACE with “…over to the Contractor. Installation shall be by the casework manufacturer with supervision by the Contractor. Casework has an anticipated delivery date of late-June.” Item 3. Section 01 21 00 Allowances: Part 3.3 SCHEDULE OF ALLOWANCES, A. Allowance No. 1 DELETE “…to provide fire rated construction, as specified on Drawing DM-102 ($1,000).” REPLACE with “…to provide fire rated construction, ($10,000).” Item 4. Section 01 21 00 Allowances: Part 3.3.B, SCHEDULE OF ALLOWANCES, B. Allowance No. 2 DELETE “…fasteners and/or appurtenances, as specified on Drawing DM-102 ($500).” REPLACE with “…fasteners and/or appurtenances, ($7,500).” Item 5. Section 01 21 00 Allowances: Part 3.3.C, SCHEDULE OF ALLOWANCES, Allowance No. 3: DELETE “…finish floor installation, as specified on Drawing DM-102 ($1,000).” REPLACE with “…finish floor installation, ($1,500).” Grumman Hall First and Second Floor Renovation Phase 1 Addendum No. 1 May 6, 2020 Page 2 Item 6. Section 096519 Resilient Tile Floor DELETE in its entirety. Item 7. ADD Section 096543 Linoleum Flooring, attached. Item 8. Drawing T-102 DELETE in its entirety. REPLACE with revised Drawing T-102, attached. Item 9. Drawing DA-102 DELETE in its entirety. REPLACE with revised Drawing DA-102, attached. Item 10. Drawing A-102 DELETE in its entirety. REPLACE with revised Drawing A-102, attached. Item 11. Drawing A-112 DELETE in its entirety. REPLACE with revised Drawing A-112, attached. Item 12. Drawing A-113 DELETE in its entirety. REPLACE with revised Drawing A-113, attached. Item 13. Drawing A-121 DELETE in its entirety. REPLACE with revised Drawing A-121, attached. Item 14. Drawing A-142 DELETE in its entirety. REPLACE with revised Drawing A-142, attached. Grumman Hall First and Second Floor Renovation Phase 1 Addendum No. 1 May 6, 2020 Page 3 Item 15. Drawing A-602 DELETE in its entirety. REPLACE with revised Drawing A-602, attached. Item 16. Drawing A-603 DELETE in its entirety. REPLACE with revised Drawing A-603, attached. Item 17. Drawing S-100 DELETE in its entirety. REPLACE with revised Drawing S-100, attached. Item 18. Drawing M-001 DELETE in its entirety. REPLACE with revised Drawing M-001, attached. Item 19. Drawing DM-102 DELETE in its entirety. REPLACE with revised Drawing DM-102, attached. Item 20. Drawing DM-103 DELETE in its entirety. REPLACE with revised Drawing DM-103, attached. Item 21. Drawing DM-104 DELETE in its entirety. REPLACE with revised Drawing DM-103, attached. Item 22. Drawing M-102 DELETE in its entirety. REPLACE with revised Drawing M-102, attached. Grumman Hall First and Second Floor Renovation Phase 1 Addendum No. 1 May 6, 2020 Page 4 Item 23. Drawing M-103 DELETE in its entirety. REPLACE with revised Drawing M-103, attached. Item 24. Drawing M-112 DELETE in its entirety. REPLACE with revised Drawing M-112, attached. Item 25. Drawing M-301 DELETE in its entirety. REPLACE with revised Drawing M-301, attached. Item 26. Drawing M-400 DELETE in its entirety. REPLACE with revised Drawing M-400, attached. Item 27. Drawing M-401 DELETE in its entirety. REPLACE with revised Drawing M-401, attached. Item 28. Drawing M-402 DELETE in its entirety. REPLACE with revised Drawing M-402, attached. Item 29. Drawing P-102 DELETE in its entirety. REPLACE with revised Drawing P-102, attached. Item 30. Drawing P-300 DELETE in its entirety. REPLACE with revised Drawing P-300, attached. Grumman Hall First and Second Floor Renovation Phase 1 Addendum No. 1 May 6, 2020 Page 5 Item 31. Drawing P-301 DELETE in its entirety. REPLACE with revised Drawing P-301, attached. Item 32. Drawing E-001 DELETE in its entirety. REPLACE with revised Drawing E-001, attached. Item 33. Drawing E-003 DELETE in its entirety. REPLACE with revised Drawing E-003, attached. Item 34. Section 230700 Insulation DELETE in its entirety. REPLACE with revised Section 230700 Insulation, attached. Item 35. RFI Questions and Clarifications See attached RFI Log (Items 1-29) Attachments: Section 096543 Linoleum Flooring Section 230700 Insulation Revise Drawings: Drawing T-102 Drawing DA-102 Drawing A-102 Drawing A-112 Drawing A-113 Drawing A-121 Drawing A-142 Drawing A-602 Drawing A-603 Drawing S-100 Drawing M-001 Drawing DM-102 Drawing DM-103 Drawing DM-104 Drawing M-102 Drawing M-103 Drawing M-112 Drawing M-301 Drawing M-400 Drawing M-401 Drawing M-402 Drawing P-102 Drawing P-300 Drawing P-301 Drawing E-001 Drawing E-003 RFI Log (Items 1-29) ****END OF ADDENDUM**** Grumman Hall First and Second Floor Renovation Phase 1 May 6, 2020 Addednum No 1 LINOLEUM FLOORING 096543 - 1 SECTION 096543 LINOLEUM FLOORING PART 1 - GENERAL 1.1 SUMMARY A. Work of this Section includes all labor, materials, equipment, and services necessary to complete the flooring as shown on the drawings and/or specified herein, including, but not limited to, the following: 1. Linoleum sheet flooring. 1.2 ACTION SUBMITTALS A. Product Data: For each type of product, including full range of mfr. pattern and color options. B. Samples: For each exposed product and for each color and pattern selected from mfr. standard options, minimum size 12”x12”. 1.3 CLOSEOUT SUBMITTALS A. Maintenance data. B. Warranty: Submit mfr. warranty covering product for minimum 5 years. 1.4 QUALITY ASSURANCE A. Installer Qualifications: An entity that employs installers and supervisors who are competent in techniques required by manufacturer for flooring installation and seaming methods indicated. 1. Engage an installer who employs workers for this Project who are trained or certified by flooring manufacturer for installation techniques required. PART 2 - PRODUCTS 2.1 PERFORMANCE REQUIREMENTS A. Fire-Test-Response Characteristics: For linoleum flooring, as determined by testing identical products according to ASTM E648 or NFPA 253 by a qualified testing agency. 1. Critical Radiant Flux Classification: Class I, not less than 0.45 W/sq. cm. Grumman Hall First and Second Floor Renovation Phase 1 May 6, 2020 Addednum No 1 LINOLEUM FLOORING 096543 - 2 B. Meets ASTM F 2034: Type 1 performance standards for sheet linoleum floor covering C. Static coefficient of friction (ASTM D 2047): > 0.6 D. Heat Stability by Color Change (ASTM F 1514): ΔE < 8 E. Light Stability by Color Change (ASTM F 1515): ΔE < 8 F. Static Load Limit (ASTM F 970): Passes required with 150 psi with a result of less than 0.005 inch residual indentation G. Fire Performance Flooring Radiant Panel (ASTM E 648): Class 1 2.2 LINOLEUM SHEET FLOORING (RES-1 and RES-2) A. Provide Linoleum Sheet Flooring: Harmonium xf by Johnsonite, Inc. B. Linoleum Sheet Flooring: ASTM F2034, Type I, linoleum sheet with backing 1. Roll Size: In manufacturer's standard length, but not less than 6’6”. C. Thickness: 0.10 inch (2.5 mm) D. Heat-Welding Bead: For seamless installation, solid-strand product of linoleum flooring manufacturer. 1. Colors: Match linoleum flooring E. Integral-Flash-Cove-Base Accessories: 1. Cove Strip: 1-inch (25.4-mm) radius, provided or approved by manufacturer. 2. Cove-Base Cap Strip: Square metal provided or approved by manufacturer. F. Colors and Patterns: As selected by Architect from manufacturers full range. 2.3 INSTALLATION MATERIALS A. Trowelable Leveling and Patching Compounds: Latex-modified, portland-cement-based or blended hydraulic-cement-based formulation provided or approved by linoleum flooring manufacturer for applications indicated. B. Adhesives: Water-resistant type recommended by flooring and adhesive manufacturers to suit products and substrate conditions indicated. C. Floor Polish: Provide protective, liquid floor-polish products recommended by linoleum flooring manufacturer. Grumman Hall First and Second Floor Renovation Phase 1 May 6, 2020 Addednum No 1 LINOLEUM FLOORING 096543 - 3 PART 3 - EXECUTION 3.1 PREPARATION A. Prepare substrates according to linoleum flooring manufacturer's written instructions to ensure adhesion of flooring. B. Concrete Substrates: Prepare according to ASTM F710. 1. Verify that substrates are dry and free of curing compounds, sealers, and hardeners. 2. Remove substrate coatings and other substances that are incompatible with flooring adhesives and that contain soap, wax, oil, or silicone, using mechanical methods recommended by linoleum flooring manufacturer. Do not use solvents. This includes foreign materials such as dust, paint, grease, oils, solvents, curing and hardening compounds, sealers, asphalt, and old adhesive residue. 3. Alkalinity and Adhesion Testing: Perform tests recommended by linoleum flooring manufacturer. Proceed with installation only after substrate alkalinity falls within range on pH scale recommended by manufacturer in writing, but not less than 7 or more than 9 pH. 4. Moisture Testing: Test shall be conducted in accoradance with ASTM F2170. Perform tests so that each test area does not exceed 1000 sq. ft. and perform no fewer than three tests in each installation area and with test areas evenly spaced in installation areas. a. Anhydrous Calcium Chloride Test: ASTM F1869. Proceed with installation only after substrates have maximum moisture-vapor-emission rate of 3 lb of water/1000 sq. ft. in 24 hours. b. Relative Humidity Test: Using in-situ probes, ASTM F2170. Proceed with installation only after substrates have a maximum 80 percent relative humidity level measurement. 5. An adhesive bond test should be performed using the actual flooring materials and adhesive to be installed. The test areas should be a minimum of 36" x 36" and remain in place for at least 72 hours and then evaluated for bond strength to the concrete. C. Fill cracks, holes, and depressions in substrates with trowelable leveling and patching compound; remove bumps and ridges to produce a uniform and smooth substrate. Floors shall be smooth prior to installation. D. Do not install flooring until materials are the same temperature as space where they are to be installed. 1. At least 72 hours in advance of installation, move flooring and installation materials into spaces where they will be installed. E. Immediately before installation, sweep and vacuum clean substrates to be covered by flooring. Grumman Hall First and Second Floor Renovation Phase 1 May 6, 2020 Addednum No 1 LINOLEUM FLOORING 096543 - 4 3.2 INSTALLATION, GENERAL A. Comply with manufacturer's written instructions for installing flooring. B. Scribe and cut flooring to butt neatly and tightly to vertical surfaces and permanent fixtures, including built-in furniture, cabinets, pipes, outlets, edgings, thresholds, door frames, and nosings. C. Extend flooring into toe spaces, door reveals, closets, and similar openings. D. Maintain reference markers, holes, and openings that are in place or marked for future cutting by repeating on flooring as marked on substrates. Use chalk or other nonpermanent marking device. E. Install flooring on covers for telephone and electrical ducts and similar items in installation areas. Maintain overall continuity of color and pattern between pieces of flooring installed on covers and adjoining flooring. Tightly adhere flooring edges to substrates that abut covers and to cover perimeters. F. Adhere flooring to substrates using a full spread of adhesive applied to substrate to produce a completed installation without open cracks, voids, raising and puckering at joints, telegraphing of adhesive spreader marks, and other surface imperfections. G. Heat-Welded Seams: For seamless installation, comply with ASTM F1516. Rout joints and heat weld with welding bead to fuse sections permanently into a seamless flooring installation. Prepare, weld, and finish seams to produce surfaces flush with adjoining flooring surfaces. 3.3 LINOLEUM SHEET FLOORING INSTALLATION A. Unroll linoleum sheet flooring and allow it to stabilize before cutting and fitting. B. Lay out linoleum sheet flooring as follows: 1. Maintain uniformity of flooring direction. 2. Minimize number of seams; place seams in inconspicuous and low-traffic areas, at least 6 inches (152 mm) away from parallel joints in flooring substrates. 3. Match edges of flooring for color shading at seams. 4. Avoid cross seams. 5. Eliminate deformations that result from hanging method used during drying process (stove bar marks). C. Integral-Flash-Cove Base: Cove flooring 6 inches (152 mm) up vertical surfaces. Support flooring at horizontal and vertical junction with cove strip. Butt at top against cap strip. Grumman Hall First and Second Floor Renovation Phase 1 May 6, 2020 Addednum No 1 LINOLEUM FLOORING 096543 - 5 3.4 CLEANING AND PROTECTION A. Floor Polish: Remove soil, adhesive, and blemishes from linoleum flooring surfaces before applying liquid floor polish. 1. Apply three coats. B. After allowing drying room film (yellow film caused by linseed oil oxidation) to disappear, cover linoleum flooring until Substantial Completion. END OF SECTION 096543 GRUMMAN HALL FIRST AND SECOND FLOOR RENOVATION PHASE 1 ADDENDUM NO. 1 Cornell University, Ithaca, NY May 6, 2020 Insulation 230700 - 1 SECTION 230700 INSULATION PART 1 - GENERAL 1.1 RELATED DOCUMENTS A. Drawings and applicable provisions of the Contract, including General and Supplementary Conditions, Division 1 - General Requirements, and the General Provisions, Section 230000, govern the work of this Division. B. Requirements given herein may be affected by other related requirements of the project specification. Correlation of the contract requirements is the responsibility of the contractor. 1.2 REFERENCES A. Perform the work in accordance with the requirements of Section 230000, General Provisions, and with the provisions of all applicable codes and laws. B. Conform to applicable performance standards, listings or approvals of the following organizations. 1.National Fire Protection Association (NFPA) 2.Underwriters Laboratories (UL) C. All insulating materials shall comply with the following ratings: 1.Flamespread -25 2.Smoke Developed -50 3.Fuel Contributed -50 1.3 SUBMITTALS A. Procedure: Prepare and make the submissions listed below and in Section 230000 in accordance with the procedure specified in Section 230000. B. Shop Drawings 1.Insulating materials and jackets. 2.Insulating cements, mastics and adhesives. 3.Methods of installation. 4.Pump enclosure details. 5.Pipe shields. 6.Schedule of insulation (system, material, thickness, cover, method of installation). 1.4 SYSTEM TESTING A. Perform operating tests and instruct Owner's personnel as specified in Section 230000. GRUMMAN HALL FIRST AND SECOND FLOOR RENOVATION PHASE 1 ADDENDUM NO. 1 Cornell University, Ithaca, NY May 6, 2020 Insulation 230700 - 2 PART 2 - PRODUCTS 2.1 INSULATION MATERIALS A. Type A - Fiberglass Insulation 1.The insulation should be sectional pipe jacketed with an embossed barrier laminate. 3.5 pound density insulation with a maximum thermal conductivity(k) of 0.29 Btu-in/hr-ft2-OF and rated to 850OF, composed of glass fibers bonded with a thermosetting resin. Insulation to be faced with vapor barrier of white flame-resistant UL rated Kraft paper bonded to reinforced aluminum foil. Vapor barrier to have a maximum permeance of 0.02 perms. 2.Indoor Piping Service Pipe Size Thickness Fitting Type Hydronic Heating 1-1/4” & below 1.5"F (141 oF - 200oF)1-1/2” and above 2” Chilled Water 1-1/4” & below 1"G (40oF - 60oF)1-1/2” and above 1” Condensate Drains All Sizes 1"G Domestic Water 6” & below 1"G Above 6”1” 3.Manufacturers: Owens-Corning, SSL II Johns Manville - Micro-Lok HP Knauf 1000o Pipe Insulation B. Type B – Not Used. C. Type C – Not Used D. Type D – Not Used. E. Type E – Not Used F. Type F - Fiberglass insulation for valves/fittings/flanges (other than vapor seal insulation). 1.Molded factory-formed fibrous glass with 3.5 PCF minimum density, max. K = .3 at 200OF, mean, rated to 450OF. 2.Finish with white 0.020”, 25/50 rated PVC jacket, as manufactured by Proto LoSMOKE, Zeston (for use with fiberglass Hamfab inserts) or approved equal. Fitting covers and jacketing to be precurled. 3.Service:Thickness: Hot Water Same as Piping GRUMMAN HALL FIRST AND SECOND FLOOR RENOVATION PHASE 1 ADDENDUM NO. 1 Cornell University, Ithaca, NY May 6, 2020 Insulation 230700 - 3 4.Manufacturers: Fibrous Glass Products, Inc. Insulcoustic Corp. Hamfab G. Type G - Fiberglass insulation for valves, fittings, flanges (vapor seal insulation). 1.Molded, factory-formed fibrous glass with 3.5 PCF minimum density, max. barrier adhesive and wrapped with glass mesh tape. Each fitting to be finished with two coats of Benjamin Foster 30-36 vapor seal. 2.Finish with white 0.020”, 25/50 rated PVC jacket, as manufactured by Proto LoSMOKE, Zeston (for use with fiberglass Hamfab inserts) or approved equal. All joints between PVC jacket and pipe covering shall be sealed with vapor barrier tape. Fitting covers and jacketing to be precurled. 3.Service:Thickness: Chilled Water Same as piping Domestic Water Same as piping Roof Drains Same as piping 4.Manufacturers: Fibrous Glass Products, Inc. Insulcoustic Corp. Hamfab H. Type H - Blanket/wrap 1.0.75 pound density formaldehyde free insulation with a maximum thermal conductivity (k) of 0.27Btu-in/hr-ft2-oF at 75oF and minimum R-value of 5, composed of glass fibers bonded with a thermosetting resin. Insulation to be faced with vapor barrier of reinforced aluminum foil bonded to flame resistant UL rated Kraft paper. Vapor barrier to have a maximum permeance of 0.02 perms. 2.Service: Thickness: Concealed Ductwork Supply Air 1-1/2" Return Air 1-1/2" Exhaust Air downstream 1-1/2" & 5’ upstream of motorized damper. 3.Manufacturers: CertainTeed Soft Touch duct wrap with FSK facing. Johns Manville Microlite XG duct wrap with FSK facing. Knauf – Duct Wrap with FSK jacket. Owens-Corning Fiberglass – Type 100 all service duct wrap. GRUMMAN HALL FIRST AND SECOND FLOOR RENOVATION PHASE 1 ADDENDUM NO. 1 Cornell University, Ithaca, NY May 6, 2020 Insulation 230700 - 4 I.Type I - Duct Board 1.Six (6) pound density insulation with a maximum thermal conductivity (k) of 0.23Btu-in/hr- ft2-oF at 75oF, composed of glass fibers bonded with a thermosetting resin. Insulation to be faced with vapor barrier of reinforced aluminum foil bonded to flame resistant UL rated Kraft paper. Vapor barrier to have a maximum permeance of 0.02 perms. 2.Service:Thickness: Exposed ductwork Supply Air (loading dock only)1-1/2" Return Air (loading dock only)1-1/2" Outside Air (loading dock only)1-1/2" 3.Manufacturers: Certainteed – CertaPro Commercial Board. Johns Manville – Spin-Glas Board Knauf - Insulation Board J.Type J – Reflective Bubble Duct Insulation 1.Double layer polyethylene bubble, bonded to and sandwiched between two radiant barrier sheets. Installation method shall achieve a thermal resistance of R-4.2. Insulation shall be classified as Class 1/Class A in accordance with the ASTM E84- 09 fire test standard. 2.Service:Thickness: Exposed ductwork Supply Air 5/16” 3.Manufacturers: rFoil 2260 Ecofoil Reflectix K. Type K – Not Used L.Type L - Not Used M. Type M - Fire Resistive Duct Wrap 1.Flexible fire-resistant wrap consisting of a non-asbestos inorganic fiber blanket fully encapsulated with a scrim-reinforced foil. The product shall be 1-1/2" thick, 6 pcf density, used to fire rate commercial kitchen grease ducts. 2.Product shall provide zero clearance to combustible construction throughout the entire enclosure system (per ICC-ES ESR-1255), and manufacturer shall offer products to be used in combination with flexible fire-resistant wrap to firestop the duct when the duct penetrates fire-rated floor or wall assemblies. Manufacturer of flexible fire-resistant wrap shall provide a firestop solution where a T-rating is required for penetrations located outside wall cavities or outside fire-resistance rated shaft enclosures. 3.Two-layer grease duct applications: Flexible fire-resistant wrap shall meet the criteria of ASTM E 2336 Standard Test Methods for Fire Resistive Grease Duct Enclosure Systems. GRUMMAN HALL FIRST AND SECOND FLOOR RENOVATION PHASE 1 ADDENDUM NO. 1 Cornell University, Ithaca, NY May 6, 2020 Insulation 230700 - 5 4.T-rating for metallic through-penetrating items: Flexible fire-resistant wrap shall be used in conjunction with manufacturer’s standard offer sealants to achieve up to 2-hour equal F & T-ratings in ASTM E 814 (UL 1479) tested through-penetrations. 5.Service:Thickness: Kitchen exhaust ductwork 1-1/2" layer with multiple layers as necessary for a two- hour fire-resistive rating. 6.Manufacturer: 3M™ Fire Barrier Duct Wrap 616+ FireMaster® FastWrap® XL FyreWrap® Elite® 1.5 PART 3 - EXECUTION 3.1 INSULATION - GENERAL A. All insulating materials shall be applied only by experienced workmen, in accordance with the best covering practice. All piping, duct or equipment shall be blown out, cleaned, tested and painted prior to the application of any covering. B. At all openings insulation, insulate edges neatly and protect with sheet metal frames. C. All items below described in general indicate the type of covering required, however, all piping, ductwork or equipment that transmits heat or will form condensation shall be insulated. D. Insulation shall be provided throughout the length of equipment and piping, including fittings, valves and specialties (valves, flanges, unions and temperature/pressure test ports; strainers, including the whole body and blowdown valve; Steam PRV stations; Heads/bodies on steam to hot water convertors and water to water heat exchangers; Steam traps; Control valves, including actuators and gear boxes; Low point drain valves; Pumps; Expansion/compression tahnks; Air separators). E. Insulate all piping, valves, fittings, and accessories that are part of the piping systems specified to be insulated in specification section 230700. Insulate valves and strainers to permit removal of bonnets or baskets without damage to insulation on valve or strainer bodies. F. Where existing insulation is damaged by requirements of the work, replace all damaged insulation to match existing insulation’s thermal value. G. All insulation at duct access doors shall be set in sheet metal double-pan construction. H. Except for removable covers on pumps, insulation shall be permanently installed on piping specialties such as steam PRV stations, strainers and unions. A label shall be provided identifying the location of the pipe specialty. I.Chilled water pumps shall be enclosed in a removable, insulated aluminum box that allows access to the pump with no disruption of piping or electrical connections, or with minimum1-inch thick, flexible elastomeric insulation (25/50 flame spread/smoke developed index). J.No piping, ductwork, or equipment shall be insulated until tested and approved for tightness. All piping and ducts shall be dry when covered. GRUMMAN HALL FIRST AND SECOND FLOOR RENOVATION PHASE 1 ADDENDUM NO. 1 Cornell University, Ithaca, NY May 6, 2020 Insulation 230700 - 6 3.2 APPLICATION - PIPE INSULATION (TYPE A & TYPE M) A. Vapor barrier jacket: Seal longitudinal joints with vapor barrier adhesive, transverse joints sealed with vapor barrier strips and adhesive. Ends of pipe insulation sealed off with vapor barrier adhesive at all flanges, valves and fittings, and at not more than 20 feet on continuous runs of pipe. B. Finish for concealed pipe insulation: Secure all concealed pipe insulation with staples and vapor seal adhesive at longitudinal; standard all service jacket pasted on lap. C. Finish for exposed pipe insulation: Type M PVC fitting covers and jackets. 3.3 APPLICATION - INSULATION AT PIPE HANGERS A. Provide pipe hangers insulation protection saddles and shields. B. Fill each pipe covering protection saddle with same insulation as specified for respective pipe or with suitable insulating cement. C. Where shields are specified at hangers on piping with fibrous glass covering, provide for load bearing calcium silicate between shields and piping as follows: 1.For pipe covering without vapor barrier jacket, furnish at each shield 18" long calcium silicate section with canvas jacket continuous between shield and insulation. 2.For pipe covering with vapor barrier jacket, remove bottom half section of fibrous glass and replace with half section of calcium silicate. Make vapor barrier jacket continuous between shield and insulation. 3.4 APPLICATION - DUCT INSULATION (TYPE H) A. Install duct wrap over clean, dry sheet metal ducts. All duct joints and seams must be sealed to prevent air leakage from the duct. B. Duct wrap shall be cut to stretch-out dimensions. 2” piece of insulation is removed from the facing at the longitudinal and circumferential ends of the piece to form an overlap. Wrap the insulation around the perimeter of the duct with the facing out. Duct wrap shall be compressed a maximum of 25% in order to maintain thermal efficiency. Adjacent sections of insulation shall be tightly butted with the 2” overlapping. Staple seams on 6” centers. C. Minimize compression of the insulation to assure maximum thermal performance. Longitudinal seam of the vapor barrier must be overlapped a minimum of 2". D. All seams should be finished with appropriate pressure sensitive tape or glass fabric and mastic. E. Pressure sensitive tapes should be a minimum 3" wide and be applied with moving pressure using an appropriate sealing tool. F. Closure systems should have a 25/50 F.H.C. per UL 723. G. For rectangular ducts over 18" wide, the duct wrap should be secured to the duct with mechanical fasteners spaced on 18" centers to reduce sag. Care should be taken to avoid overcompressing the insulation with the retaining washer. GRUMMAN HALL FIRST AND SECOND FLOOR RENOVATION PHASE 1 ADDENDUM NO. 1 Cornell University, Ithaca, NY May 6, 2020 Insulation 230700 - 7 H. Unfaced duct wrap should be overlapped a minimum of 2" and fastened with 4" to 6" nails or skewers spaced 4" apart, or secured with a wire or banding system. I.Where vapor barrier performance is necessary, all seams, joints, penetrations, washers and damage to the facing should be repaired with a minimum 2" overlap of tape prior to system startup. 3.5 APPLICATION - DUCT INSULATION (TYPE I) A. Fasten insulation in place with wed pins and washers or equivalent mechanical fastening method, as approved. B. Seal all joints with vapor barrier adhesive to provide continuous vapor barrier. C. All edges, corners, penetrations, and joints shall be reinforced and sealed with vapor barrier adhesive tape to provide continuous vapor barrier. Tape shall be 4" wide, of type, and applied in strict conformance with manufacturer's recommendations. Tape shall be applied over insulation support washers. 3.02 APPLICATION - DUCT INSULATION (TYPE J) A. Install insulation per manufacturer’s instructions to achieve the specified R-value. Insulation shall be vapor sealed to prevent condensation on both duct and insulation surfaces. 3.6 APPLICATION - FIRE RESISTIVE DUCT WRAP (TYPE L) A. Install in accordance with manufacturer's installation guidelines to achieve 2-hour fire-resistive rating. B. Encircle the duct with continuous layers of insulation material. The material shall overlap by a minimum of three inches in the perpendicular direction. Subsequent layers of material shall be applied with a minimum three inch overlap in the longitudinal direction. Apply multiple layers as necessary to achieve a two hour zero clearance fire resistance rating. C. Secure insulation with 304 carbon steel banding (two hour rating) not less than 1/2 inches wide and 0.015 inches thick. Provide pins in addition to bands for ducts over 24” wide, per manufacturer’s installation instructions. D. Seal edges of insulation with high performance aluminum tape, 3 inches wide, E. Access doors shall be covered by three layers of insulation secured by 10 gauge pins, 4" to 5" long steel or copper coated steel, secured by 1-1/2" x 1-1/2" galvanized clips. Insulation shall be applied in three layers; each successive layer shall be 2" larger than the previously applied layer. Seal edges of exposed insulation with three inch wide aluminum tape. Access door shall be secured by 1/4" diameter threaded rods with hollow steel tubes and 1/4" wing nuts, minimum of one per corner, and 12 inches on center around the perimeter of the access door. F. Seal floor penetrations with manufacturer’s standard offering silicone sealant over packing material duct wrap. G. Extend the duct wrap 5" onto the hood in accordance with the manufacturer's recommendations. Secure the insulation with a continuous, minimum two (2) inch wide by 1/8" thick steel bar stock, fastened to the hood 4" on centers. For grease hoods, insulate the entire top of the hood to a thickness of 1-1/2". GRUMMAN HALL FIRST AND SECOND FLOOR RENOVATION PHASE 1 ADDENDUM NO. 1 Cornell University, Ithaca, NY May 6, 2020 Insulation 230700 - 8 H. Insulate all hanger rods directly in contact with the duct, with 8" of ductwrap closest to the point of contact. END OF SECTION 230700 PROJECT: CORNELL - GRUMMAN HALL FIRST & SECOND FLOOR RENOVATION - PHASE 1 Date: May 6, 2020 RFI Form RFI/Page/ Response Dwg./Spec./Rep.Section/Design Team Index Number Paragraph/Topic RFI Response 1 DA-102, DM-102 & Spec section 012100 3.3 A, B & C Allowances Please refer to drawing DA-102, "General Floor Preparation" note 6, A,B & C. All three notes indicate "as specified on drawing DM-102". I don't see any reference to this work on drawing DM-102, please clarify. Also, referring to specification section 012100, 3.3 A, B & C are the dollar amounts indicated the amounts we are to include for these allowances? See Addendum No. 1, Item 9. Notes are updated on the revised drawing. See Addendum No. 1, Items 3, 4 and 5 and note the revised Allowance amounts. The dollar amounts listed are estimates and the Contractor shall include pricing for each allowance in their bid. 2 Owner Furnished - Contractor Installed Casework Since laboratory casework suppliers typically install their own products can you provide the name of the supplier you're obtaining the casework from so we can solicit a price to install it? See Addendum No. 1, Item 2.The casework will be purchased and installed by Spencer-Virnoche. 3 19.a.1 Project duration Instruction to bidders- 19.a.1 states completion is 11 weeks from commencement of work on site. But under bid proposal form- 3. Milestone Dates a.i. states completion is 12 weeks from commencement of work onsite. Please clarify what is the duration of the project, See Addendum No. 1, Item 1. 4 Instructions to Bidders, paragraph 19.a.1 Bid Proposal Form, paragraph 3.a.1 Section 01 11 00 Summary of Work, paragraph 1.3.a Project Schedule The Instructions to Bidders, paragraph 19.a.1. indicates the work shall be completed within 11 weeks. The Bid Proposal Form, paragraph 3.a.1. indicates the work shall be completed within 12 weeks. Section 01 11 00 Summary of Work, paragraph 1.3.A. indicates the renovated space is being constructed for a new faculty hire who starts on July 1, 2020. Please clarify the completion date. See Addendum No. 1, Item 1. The Instruction to Bidders is correct at eleven (11) weeks. 5 A-602 Will the large W1 window fit in the space as one unit? Will it be able to be brought in in one piece? See Addendum No. 1, Item 15. It is not expected to fit. 6 T-102 Is there a dumpster location nearby?Yes, see Addendum No. 1, Item 8. 7 T-102 Do we know how close the dumpster is to the building, is there a long travel distance? Yes, see Addendum No. 1, Item 8. 8 DA-102 Does all the black mastic on the floor need to be removed for the new flooring? See Addendum No. 1, Item 9. The existing surface needs to be prepared for the installation of the new flooring as specified. Remove mastic per General Floor Preparation Note 2, drawing DA-102. 9 A-112, A-113, & A-121 Acoustical Panels Attached to Ceiling Referring to the reflected ceiling plans, Construction Note 6, There appears to be no specification or indication in the Room Finish Schedule for the acoustic panels attached directly to the existing ceiling. Can you please provide information for this material? See Addendum No. 1, Item 13. Information is added to the drawings. 10 Roofing Work Just to confirm, there is no roofing spec but even though there are mechanical units on the roof I assume there is absolutely no roofing work or patching on this project? There is no roofing work required for the project. 11 A-603 Flooring Print A-603 Room Finish Schedule/Material Schedule CPT-1 / Broadloom Carpet by Mohawk. Need to at the very least provide some spec Guidelines, face weight for example, or provide an allowance. There are several products to select from in various price ranges! See Addendum No. 1, Item 16. 12 A-121 & A-603 Flooring Print A-603 Room Finish Schedule/Material Schedule RES-1 Chemical Resistant Resilient Sheet Flooring - Altro-Dolce is a TILE not Sheet Flooring. Are we to assume that architect wants Tile and not Sheet Flooring? See Addendum No. 1, Items 6, 13, & 16. The finishes are updated on the drawings and in the specifications. RFI/Page/ Response Dwg./Spec./Rep.Section/Design Team Index Number Paragraph/Topic RFI Response 13 A-603 & Spec section 096519 Flooring Print A-603 Room Finish Schedule/Material Schedule RES-2 Linoleum - Do we follow Material Schedule "Harmonium XF Sheet Linoleum" or are we to quote Forbo - MCT 13"x13" tile as shown in Spec Section 096519 Resilient Tile Floor Part 2.2 A ? See Addendum No. 1, Items 7, 13 and 16. The finishes are updated on the drawings and in the specifications. 14 A-102 New Wall Shelves Construction Keynote 1 states that the Casework is to be OFCI. Construction Keynote 2 indicates New Wall Shelves. Are these also to be OFCI? See Addendum No. 1, Items 2 and 14. 15 DA-102 Floor Mastic The video walk through showed existing mastic where the abatement contractor had removed the flooring. There is no reference to this on the plans. Are we to include removal of the mastic in our proposal? See Addendum No. 1, Item 9. The existing surface needs to be prepared for the installation of the new flooring as specified. Remove mastic per General Floor Preparation Note 2, drawing DA-102. 16 A-112, A-113 & A-603 Acoustical Panels Reflected Ceiling Plan Keynote 6 calls for acoustical panels attached to ceiling. Plan sheet A-603 does not show these on the Room Finish Schedule or on the Material Schedule. Please provide specifications for these panels. See Addendum No. 1, Items 11, 12 and 16. Information is added to the drawings. 17 Spec section 104416 Fire Extinguishers And Cabinets Specification Section 104416 calls for Fire Extinguishers and Cabinets. I did not find any shown on the drawings. Please indicate where they are required. See Addednum No. 1, Item 10. 18 A-112 & A-113 Acoustical Panel On A-112 and A-113 Note 6 Calls for “Acoustical Panels Attached to Ceiling”. What kind of acoustical panels are these? The only acoustical panel on the finish schedule is a 2'x2' ceiling tile with grid. Are these the same as the ones called out on note 6? If not please provide spec and details on how these are attached. See Addendum No. 1, Item 13. Information is added to the drawings. 19 A-102 & A-603 2 Hour Fire Rated Partition Partition Type B/2 is shown at the pipe chase on plan sheet A- 102. Since this is a chase, should this be a shaft wall partition in lieu of the partition type shown on A-603? See Addendon No. 1, Item 16 for reference to revised wall type. 20 A-112 Acoustical Panels Attached to Ceiling Note 6/A-112 shows Acoustical Panels attached to the ceilings in the labs. With the duct work shown, it is difficult to determine the limits of these panels. Please provide reflected ceiling view without duct work and full exposure of Acoustical Panels. See Addendum No. 1, Item 13. Information is added to the drawings. 21 A-142 & Plumbing drawings Gas Cylinder Cabinets Drawing A-142 indicates 2 gas cylinder cabinets. Equipment items 13 and 27. The plumbing drawings only show 1 gas cylinder cabinet, piping etc. Can someone please clarify how many are required? See Addendum No. 1, Item 14 for clarification. 22 A-121 ACT There are different kinds of Armstrong Ultima ceiling tiles. Spec is vague on what is wanted. Please advise on what kind is needed. See Addendum No. 1, Item 16, Material Schedule. 23 A-102, DM-102, & M- 102 Radiator Covers Architectural drawings states to remove radiator covers, paint and reinstall existing. Mechanical drawings state to provide new and match existing. Please advise on if we are to reuse existing or provide new. If providing new, please provide a spec, See Addendum No. 1, Item 22 for clarification. Re- use existing radiators. New are only provided at location of demolished wall. 24 S-100 Structural Drawings Detail 2 on S100 has a note pointing to the expansion bolts that reads "See 2/S001. There is no page S001. Please provide sheet or provide detail. See Addendum No. 1, Item 17. Detail is updated. 25 P-102 Mechanical Insulation Specs mention that the sanitary and storm piping to be wrapped with sound lag - is this correct? See Addendum No. 1, Item 29 for clarification. The specidfied sound lag shall be installed on the existing vertical strom pipe in 182. No other sound lag is required. 26 Spec Section 230700 Insulation Mechanical Insulation Does the exposed ductwork all get insulated or is it considered in a conditioned space and not get insulated? If it does get insulated does it require 6# Fiberglass board as specified and with an ASJ or FSK Jacket? See Addendum No. 1, Item 34. The exposed return and exhaust ductwork does not require insulation. The exposed supply ducts shall be insulated with foil- back bublle wrap insulation similar to R-Foil. RFI/Page/ Response Dwg./Spec./Rep.Section/Design Team Index Number Paragraph/Topic RFI Response 27 Spec Section 230700 Insulation Mechanical Does all of the exposed piping get a PVC Jacket where there are no ceilings? See Addendum No. 1, Item 34. PVC jackets shall be installed on all exposed insulated piping. 28 Spec Section 230700 Insulation Mechanical There is mention of Hamfab inserts - Cornell does not use these inserts - are the Hamfab fittings required on the project? See Addendum No 1, Item 34. Altieri: PVC fittings with fiberglass inserts similar to Proto may be used in lieu of Hamfab fittings. Additional fiberglass shall be used to ensure fittings are sufficiantly full with no air gaps. 29 E-001, E-112, E-113 Electrical Symbol Please clarify what the symbol with the letters "PA" shown on plan sheets E-112 & E-113 stands for. This symbol is not shown on the legend. See Addedum No 1, Item 32. PA refers to 0-10V dimming control.