Specifications - City of Montpelier, Vermont

Title:Montpelier District Heating15241 – Vibration ControlCity of Montpelier, VTIssue Date:September 28, 2012Page #:6 of 8of the longest dimension of base, but not less than 6" deep. Size so that theweight of frame plus concrete fill will be greater than operating weight ofequipment supported. Provide steel reinforcing both ways with both ends ofreinforcing buttwelded to base framing. Provide welded support brackets forconnection to spring isolator units.L. Roof Curb Isolators (Type D): Fabricated frame units sized to match roof curbs,formed with isolation springs between extruded aluminum upper and lowersections, which are shaped and positioned to prevent metal to metal contact.Provide continuous airtight and waterproof seal between upper and lowerextrusions. Include provisions for anchorage of frame unit to roof curb, and foranchorage of equipment to unit.M. Flexible Pipe Connectors:1. For nonferrous piping, provide bronze hose covered with bronze wirebraid with copper tube ends or bronze flanged ends, brazewelded to hose.2. For ferrous piping, provide stainless steel hose covered with stainless steelwire braid with NPT steel nipples or 150 psi ANSI flanges, welded tohose.3. Flexible Pipe Connectors: Provide neoprene or EDPM constructionconsisting of multiple plies of nylon tire cord fabric and elastomer moldedand cured in hydraulic rubber presses. Provide straight or elbowconnector as indicated, rated at 125 psi at 220°F.PART 3– EXECUTION3.1 INSPECTIONA. Examine areas and conditions under which vibration control units are to beinstalled. Do not proceed with work until unsatisfactory conditions have beencorrected in manner acceptable to Installer.3.2 PERFORMANCE OF ISOLATORSA. General: Comply with minimum static deflections recommended by ASHRAE,for selection and application of vibration isolation materials and units asindicated.VIBRATION CONTROL152416