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Southern Human Services Center Smith Sinnett /2020072 <br />HVAC and Roof Renovations Orange County,North Carolina <br />Vibration and Seismic Controls for HVAC <br /> 23 05 48 - 2 <br />1.Vibration Isolators: <br />a.Kinetics Noise Control,Inc <br />b.Mason Industries <br />c.Vibration Eliminator Company,Inc <br />d.The VMC Group/Amber Booth <br />e.Or Approved Equal <br />2.Source Limitations: Furnish vibration-isolators and associated accessories produced by a <br />single manufacturer and obtained from a single supplier. <br />B.General Requirements: <br />1.Resilient Materials for Vibration Isolators: Oil,ozone,and oxidant resistant. <br />2.Spring Elements for Spring Isolators: <br />a.Color code or otherwise identify springs to indicate load capacity. <br />b.Lateral Stability: Minimum lateral stiffness to vertical stiffness ratio of 0.8. <br />c.Designed to operate in the linear portion of their load versus deflection curve over <br />deflection range of not less than 50 percent above specified deflection. <br />d.Designed to provide additional travel to solid of not less than 50 percent of rated <br />deflection at rated load. <br />e.Selected to provide designed deflection of not less than 75 percent of specified <br />deflection. <br />f.Selected to function without undue stress or overloading. <br />C.Vibration Isolators for Nonseismic Applications: <br />1.Resilient Material Isolator Pads: <br />a.Description: Single or multiple layer pads utilizing elastomeric (e.g.neoprene,rubber) <br />isolator material. <br />b.Pad Thickness: As required for specified minimum static deflection;minimum 0.25 inch <br />thickness. <br />c.Multiple Layer Pads: Provide bonded,galvanized sheet metal separation plate between <br />each layer. <br />2.Housed Spring Isolators: <br />a.Description: Isolator assembly consisting of single or multiple free-standing,laterally <br />stable steel spring(s)within a metal housing. <br />b.Furnished with integral elastomeric snubbing elements,adjustable type,for limiting <br />equipment movement and preventing metal-to-metal contact between housing elements. <br />c.Bottom Load Plate: Steel with nonskid,elastomeric isolator pad with provisions for <br />bolting to supporting structure as required. <br />d.Furnished with integral leveling device for positioning and securing supported <br />equipment. <br />3.Restrained Spring Isolators,Nonseismic: <br />a.Description: Isolator assembly consisting of single or multiple free-standing,laterally <br />stable steel spring(s)within a metal housing designed to prevent movement of supported <br />equipment above an adjustable vertical limit stop. <br />b.Bottom Load Plate: Steel with nonskid elastomeric isolator pad with provisions for <br />bolting to supporting structure as required. <br />c.Furnished with integral leveling device for positioning and securing supported <br />equipment. <br />d.Provides constant free and operating height. <br />4.Resilient Material Isolator Hangers,Nonseismic: <br />a.Description: Isolator assembly designed for installation in hanger rod suspension <br />system utilizing elastomeric (e.g.neoprene,rubber)isolator material for the lower hanger <br />rod connection. <br />5.Spring Isolator Hangers,Nonseismic: <br />a.Description: Isolator assembly designed for installation in hanger rod suspension <br />system utilizing single or multiple free-standing,laterally stable steel spring(s)in series <br />with an elastomeric element for the lower hanger rod connection. <br />DocuSign Envelope ID: 94E7997D-4F29-42F6-A9B4-0A160438D2A6