Specifications - City of Montpelier, Vermont

Title:Montpelier District HeatingCity of Montpelier, VT02665 – Water SystemsL. Place blanket material in accordance with the Trenching Section.Issue Date:September 28, 2012Page #:5 of 7M. Warning tape shall be placed above pipe, approximately 2’ below the finished grade and shallbe clearly imprinted with “CautionBuried Water Pipe”. Trace lines shall be installed 1’above the water pipe and shall be connected to each valve box.N. After placement of the blanket material, the pipe shall be checked for alignment and grade. Ifthe pipe has been properly installed, the CONTRACTOR may refill or backfill the remainderof the trench in conformance with the Trenching Section and Details shown on the Drawings.O. At the end of each day’s work or at other intervals, the Engineer, with the Contractor, willinspect the pipe installation. Unsatisfactory work shall be dug up and reinstalled to meet therequirements on the Contract Documents with no additional time allowed for completion ofthe Work and at no additional cost to the Owner.P. When cutting of pipe is required, the cutting shall be done by machine (power cutter) withoutdamage to the pipe or cement lining. Cut ends shall be smooth and at right angles to the axisof the pipe. Pipe ends to be used with a rubber gasket joint shall be beveled and filed orground smoothly to conform to a manufactured spigot end.Q. Install concrete thrust blocks at all fittings and other locations, as indicated on the places or asdirected by the Engineer. Minimum bearing area shall be as shown on the Drawings. Jointsshall be protected by 4mil. Plastic prior to placing concrete. Place concrete againstundisturbed material, and do not cover joints, bolts or nuts, or place concrete so as itinterferes with the subsequent removal of any fittings. Provide wooden side forms for thrustblocks.R. Valve and hydrant tees shall be utilized at all hydrant installations. Hydrant and valve teesshall have an integrally attached, rotatable gland, which, after bolting to valve or adjoiningfitting, the joint is effectively restrained from separation. All restraints shall be Grip Ring orapproved equal.3. 4 JOINTING MECHANICAL JOINT FITTINGSA. Mechanical joints at valves, fitting and where designated, shall be in accordance with ANSIA21.11/AWWA C111 Appendix A – Notes on Installation of Mechanical Joints and theinstruction of the manufacturer. TO assemble the joints in the field, thoroughly clean thejoint surfaces and rubber gasket with soapy water before tightening the bolts. Tighteningtorque for bolts shall be 7590 ft.lbs. Under no condition shall extension wrenches or pipeover handle or ordinarily ratchet wrenches be used to secure greater leverage. Afterinstallation, apply a bituminous coating to bolts and nuts. A retainer gland instead of acommon follower gland shall be used whenever mechanical joints are used.3.5 FLANGED JOINTSTighten bolts in flanged joints alternately and evenly as specified for mechanical joints. Apply abituminous coating to bolts and nuts for buried joints.WATER SYSTEMS 02665 5