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DocuSign Envelope ID: B94F2D40-3B3C-47A7-86C2-6F1 B4F92C62C <br /> Orange County Emergency Services Building Construction Documents <br /> a. Description: Isolator assembly designed for installation in hanger rod suspension system <br /> utilizing elastomeric (e.g. neoprene, rubber) isolator material for the lower hanger rod <br /> connection. <br /> 7. Spring Isolator Hangers, Non-Seismic: <br /> a. Description: Isolator assembly designed for installation in hanger rod suspension system <br /> utilizing single or multiple free-standing, laterally stable steel spring(s) in series with an <br /> elastomeric element for the lower hanger rod connection. <br /> b. Designed to accommodate misalignment of bottom hanger rod up to 30 degrees <br /> (plus/minus 15 degrees)without short circuiting of isolation. <br /> 8. Combination Resilient Material/Spring Isolator Hangers, Non-Seismic: <br /> a. Description: Isolator assembly designed for installation in hanger rod suspension system <br /> utilizing single or multiple free-standing, laterally stable steel spring(s)for the lower <br /> hanger rod connection and elastomeric (e.g. neoprene, rubber) isolator material for the <br /> upper hanger rod connection. <br /> b. Designed to accommodate misalignment of bottom hanger rod up to 30 degrees <br /> (plus/minus 15 degrees)without short circuiting of isolation. <br /> 9. Thrust Restraints: <br /> a. Description: Assembly utilizing free-standing, laterally stable steel spring designed for <br /> resisting horizontal motion due to thrust (e.g. air pressure from a fan), and intended for <br /> installation in pairs. <br /> PART 3 EXECUTION <br /> 3.01 EXAMINATION <br /> A. Verify that field measurements areas shown on the drawings. <br /> B. Verify that mounting surfaces are ready to receive vibration isolation and/or seismic control <br /> components and associated attachments. <br /> C. Verify that conditions are satisfactory for installation prior to starting work. <br /> 3.02 INSTALLATION <br /> A. Install products in accordance with manufacturer's instructions. <br /> B. Install anchors and fasteners in accordance with ICC Evaluation Services, LLC (ICC-ES) evaluation <br /> report conditions of use where applicable. <br /> C. Secure fasteners according to manufacturer's recommended torque settings. <br /> D. Install flexible piping connections to provide sufficient slack for vibration isolation and/or seismic <br /> relative displacements as indicated or as required. <br /> E. Vibration Isolation Systems: <br /> 1. Spring Isolators: <br /> a. Position equipment at operating height; provide temporary blocking as required. <br /> b. Lift equipment free of isolators prior to lateral repositioning to avoid damage to isolators. <br /> c. Level equipment by adjusting isolators gradually in sequence to raise equipment <br /> uniformly such that excessive weight or stress is not placed on any single isolator. <br /> 2. Isolator Hangers: <br /> a. Use precompressed isolator hangers where required to facilitate installation and prevent <br /> damage to equipment utility connection provisions. <br /> b. Locate isolator hangers at top of hanger rods in accordance with manufacturer's <br /> instructions. <br /> 3. Thrust Restraints: <br /> a. Adjust restraint movement under normal operating static pressure. <br /> 4. Clean debris from beneath vibration-isolated equipment that could cause short circuiting of <br /> isolation. <br /> 5. Use elastomeric grommets for attachments where required to prevent short circuiting of <br /> isolation. <br /> 6. Adjust isolators to be free of isolation short circuits during normal operation. <br /> 7. Do not overtighten fasteners such that resilient material isolator pads are compressed beyond <br /> manufacturer's maximum recommended deflection. <br /> PDC Project 18102 VIBRATION AND SEISMIC 23 05 48- 3 <br /> 12/17/2018 CONTROLS FOR HVAC <br />