Specifications - City of Montpelier, Vermont

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Title:Montpelier District HeatingCity of Montpelier, VT15891 – Metal Ductwork & AccessoriesIssue Date:September 28, 2012Page #:5 of 19D. Duct Sealant, Two Part System: Twopart system consisting of an adhesiveactivator and a gypsum impregnated fiber tape. Materials shall be suitable for useoutdoors, and shall be listed by UL Laboratories to have a flame spread andsmoke developed ratings of less than 25, wet of dry.1. Hardcast: DT5300 tape and RTA50 adhesive2. United McGill: UnicastE. Duct Sealant, Flange Type: Continuous butyl rubber extrusion specificallydesigned for use in flanged duct joints. Product shall be listed by ULLaboratories to have a flame spread and smoke developed ratings of less than 25,wet of dry.1. Hardcast: Flange Grip #1902FRF. Ductwork Support Materials: Except as otherwise indicated, provide hotdippedgalvanized steel fasteners, anchors, rods, straps, trim and angles for support ofductwork.1. For stainless steel, aluminum or copper ductwork, provide supportmaterials compatible with the materials being supported.2.3 RECTANGULAR DUCT FABRICATIONA. General: Except as otherwise indicated, fabricate rectangular ducts withgalvanized sheet steel, in accordance with SMACNA “HVAC Duct ConstructionStandards, Third Edition (2005)” Tables 21 through 249, including associateddetails. Fabricate rectangular ducts with aluminum sheet, in accordance withSMACNA “HVAC Duct Construction Standards, Third Edition (2005) Tables 21through 252, including associated details. Conform to the requirements in thereferenced standard for metal thickness, reinforcing types and intervals, tie rodapplications, and joint types and intervals.B. Fabricate rectangular ducts in lengths appropriate to reinforcement and rigidityclass required for pressure classification.C. Provide materials that are free from visual imperfections such as pitting, seammarks, roller marks, stains, and discoloration.D. Cross Breaking or Cross Beading: Cross break or bead duct sides that are 11" andMETAL DUCTWORK AND ACCESSORIES 15891 5
Title:Montpelier District HeatingCity of Montpelier, VT15891 – Metal Ductwork & AccessoriesIssue Date:September 28, 2012Page #:6 of 19larger and are 20 gauge or less, with more than 4 sq. ft. of unbraced panel area, asindicated in SMACNA “HVAC Duct Construction Standard,” Figure 29,regardless of insulation.E. Fabricate elbows, transitions, offsets, branch connections, and other ductconstruction in accordance with SMACNA “HVAC Metal Duct ConstructionStandard, Third Edition (2005)”, Figures 41 through 49, with the followingmodifications:1. Figure 42a. Type RE1 – Square throat is not permitted.b. Types RE4, 6, 7, 8, 9, & 10 are not permitted.2. Figure 43a. Use single thickness vanes with trailing ends, SP=1½”.3. Figure 47a. Offset types 1& 2 are not allowed.b. Minimum bell mouth radius shall be 1½”.4. Figure 48a. Figures A & C are not allowed.F. Fabricate duct fittings to match adjoining ducts, and to comply with ductrequirements as applicable to fittings. Limit angular tapers to 30° for contractingtapers and 20° for expanding tapers.G. Fabricate ductwork with accessories installed during fabrication to the greatestextent possible.H. Duct joining system shall be Ductmate, Nexus, Quicduc, Transverse DuctConnection (TDC), or PyramidLok for all ducts with longest side over 24".Above systems are optional for smaller duct systems. Above systems are to beused with galvanized sheet steel and aluminum sheet. Ducts fabricated ofstainless steel shall have welded joints.I. Button punch snap lock (figure 22, type L2) and internal standing seam joints(figure 27) are not allowed.METAL DUCTWORK AND ACCESSORIES 15891 6
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Title:Project ManualMontpelier Dist
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CONSTRUCTION of a DISTRICT HEATING
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The City also reserves the right to
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NOTICE OF AWARDTO:_________________
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successors, and assigns.IN WITNESS
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ATTEST:____________________________
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Witness as to Principal____________
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CHANGE ORDER # _________CHANGE ORDE
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PAYMENT REQUEST FORMMontpelier Dist
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1.17. PROJECT 3 The undertaking to
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9. PATENTSof the PROJECT will resul
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creditors, or if a trustee or recei
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21.3.2.4. Personal Injury Liability
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26.3. The CONTRACTOR shall be fully
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• Install piping and fittings (in
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The only items to be excluded from
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Materials:• Purchase, shipment, f
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price per linear foot of trench. Pa
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Description:This item consists of a
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This item consists of all work nece
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Materials shall meet the requiremen
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Materials:Materials shall meet the
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Materials:• Shipping, transport,
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2) of the type specified will be pa
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Products.Method of Measurement:The
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Materials:• Extra pipe materials
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Bid Item 51 - Pre
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Materials shall meet the requiremen
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B. MaterialsMaterials shall meet th
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shall be made to the CONTRACTOR for
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Measurement shall be on an each bas
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use of crushed stone); taking and r
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B. MaterialsMaterials shall meet th
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Bid Item 75^ - In
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16. The Contractor shall be respons
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02511, Hot Mix Asphalt Paving and t
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The Contractor is hereby informed t
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BASE BIDNo Item Description UnitEst
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44 Pre9insulated Underground Hot Wa
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SERVICE LATERALS AND SPURS BIDNo It
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[13] Remove and Reset Granite Curb
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________________________ __________
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Montpelier District HeatingPROJECT
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DEEE0003071/003SPECIAL TERMS AND CO
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DEEE0003071/003a. Method of Payment
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DEEE0003071/003a. Requirements. The
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DEEE0003071/003applicable sections
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DEEE0003071/00321. NATIONAL ENVIRON
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DEEE0003071/003The Government has n
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DEEE0003071/003F. Protecting State
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DEEE0003071/003L. CertificationsWit
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DEEE0003071/003(C) Quantity;(D) Cos
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DEEE0003071/003(4) An Agreement bet
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DEEE0003071/003(D) Cost;(E) Time of
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DEEE0003071/003(c) Recipients agree
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DEEE0003071/003(a) Davis Bacon Act(
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DEEE0003071/003of Labor withhold or
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DEEE0003071/003submission of the
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DEEE0003071/003(6) Contracts and Su
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DEEE0003071/003this award. On behal
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DEEE0003071/003are federal governme
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Title:Montpelier District HeatingCi
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Title:Montpelier District Heating01
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Title:01340 - SubmittalsMontpelier
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Montpelier District HeatingCity of
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Title:02200 - EarthworkMontpelier D
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Title:15100 - ValvesMontpelier Dist
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Title:16110 - RacewaysMontpelier Di
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Title:16450 $ GroundingMontpelier D
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Specifications - City of Montpelier, Vermont

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