Specifications - City of Montpelier, Vermont

Title:Montpelier District HeatingCity of Montpelier, VT03050 – Concrete and Utility StructuresIssue Date:September 28, 2012Page #:4 of 86. No Action: Where the submittal is marked “No Action” or “No ActionTaken”, no review was made of this item, see comments noted onsubmittal and take appropriate action.7. MultiAction: Where the submittal is marked “MultiAction”, separatedispositions were made for the items submitted, see the review commentsfor the disposition of each item submitted.C. Any precast or castinplace concrete utility structures constructed partially or inits entirety prior to the submittal and subsequent review of shop drawings may berejected at the discretion of the OWNER, and shall be replaced by theCONTRACTOR with no additional compensation.D. The CONTRACTOR shall submit all concrete mix designs used for castinplacestructures to the OWNER for approval.PART 2– PRODUCTS2.1 STRUCTURESA. The CONTRACTOR shall be responsible for furnishing and installing allconcrete structures.B. The CONTRACTOR shall furnish and install all necessary materials required toconstruct subbase, footings, install filter fabric, drain rock, and drain pipes to thestorm sewer as specified in the plans. Structures shall be assembled inaccordance with the structure manufacturer’s recommendations.C. Precast and castinplace structures shall conform to the dimension requirementsas outlined in the Plans and the following1. Be designed by a Professional Engineer licensed in the State of Vermont tohave wall, floor, and top slabs able to sustain an HS25 loading.2. Precast sections shall have tongue and groove or shiplap joints with a butylmastic sealant conforming to ASTM C990.3. Cement used for concrete utility structures shall be Type IIA (airentrained),Type III (highearly strength), or Type IIIA (airentrained highearly strength)Portland cement conforming to ASTM C150 or equal as approved by theOWNER.4. All sections shall be cured by an approved method. Precast sections shall notbe shipped until the concrete has attained a compressive strength of 4,000 psior until 5 days after fabrication and/or repair, whichever is longer.CONCRETE AND UTILITY STRUCTURES030504