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title: Vibration Isolation and Seismic Restraint
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When to use: Vibration isolation and seismic restraint of mechanical, electrical, and plumbing (MEP) equipment, piping, ductwork, and conduit in commercial, institutional, healthcare, and industrial buildings. Covers isolator selection by required static deflection against equipment disturbing frequency; neoprene and rubber-in-shear mounts and pads, open and restrained spring isolators, spring and combination hangers, and air springs; inertia and structural-steel bases; flexible pipe connectors, flexible conduit, and thrust restraints; and the restraint of nonstructural components and their attachments per ASCE/SEI 7 Chapter 13 and the IBC — including cable and rigid bracing of distribution systems, equipment snubbers, restrained (seismic) spring isolators, anchorage to housekeeping pads and structure, special seismic certification of active equipment, and special inspection.
− Not intended for: Structural (building) seismic design and the seismic-force-resisting system, which are the work of the structural engineer of record; the manufacturer's internal vibration isolation furnished within packaged equipment; selection and rating of the supported equipment itself (see the equipment standards, e.g. [[syncs/hvac-fans]], [[syncs/hvac-pumps]]); pipe and duct hanger and support design for gravity loads (see [[syncs/hydronic-piping]] and [[syncs/hvac-ductwork]]); and testing, adjusting, and balancing of the supported systems (see [[syncs/testing-adjusting-and-balancing]]).
+ Not intended for: Structural (building) seismic design and the seismic-force-resisting system, which are the work of the structural engineer of record; the manufacturer's internal vibration isolation furnished within packaged equipment; selection and rating of the supported equipment itself (see the equipment standards, e.g. [[sync/hvac-fans]], [[sync/hvac-pumps]]); pipe and duct hanger and support design for gravity loads (see [[sync/hydronic-piping]] and [[sync/hvac-ductwork]]); and testing, adjusting, and balancing of the supported systems (see [[sync/testing-adjusting-and-balancing]]).
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## Coordination with Other Standards {toc}
−### Equipment selection, weights, and operating speeds shall be obtained from the equipment standards and schedules, including [[syncs/hvac-fans]] and [[syncs/hvac-pumps]].
+### Equipment selection, weights, and operating speeds shall be obtained from the equipment standards and schedules, including [[sync/hvac-fans]] and [[sync/hvac-pumps]].
−### Housekeeping pad dimensions, reinforcement, and embedded anchorage shall be coordinated with [[syncs/concrete-pads]].
+### Housekeeping pad dimensions, reinforcement, and embedded anchorage shall be coordinated with [[sync/concrete-pads]].
−### Pipe and duct gravity supports and the seismic bracing of piping and ductwork shall be coordinated with [[syncs/hydronic-piping]] and [[syncs/hvac-ductwork]].
+### Pipe and duct gravity supports and the seismic bracing of piping and ductwork shall be coordinated with [[sync/hydronic-piping]] and [[sync/hvac-ductwork]].
−### Raceway and conduit support and bracing shall be coordinated with [[syncs/raceways-and-conduit]].
+### Raceway and conduit support and bracing shall be coordinated with [[sync/raceways-and-conduit]].
# Referenced Standards {toc}
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### A control rod or thrust restraint shall be provided across flexible connectors where the unrestrained pressure thrust would over-extend the connector or impose thrust on the equipment nozzle. {note}
−### Piping shall be independently supported and, where required, isolated for the first several hangers away from isolated equipment so that the piping does not transmit equipment vibration through the building or load the equipment nozzle; refer to [[syncs/hydronic-piping]] for the isolated-pipe-support detail. {note}
+### Piping shall be independently supported and, where required, isolated for the first several hangers away from isolated equipment so that the piping does not transmit equipment vibration through the building or load the equipment nozzle; refer to [[sync/hydronic-piping]] for the isolated-pipe-support detail. {note}
### Flexible pipe connector datasheet {toc}
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## Flexible Conduit and Duct Connections {toc}
−### Electrical connections to isolated equipment shall be made with a length of flexible conduit looped to accommodate the equipment's isolated motion without transmitting vibration into the raceway system; refer to [[syncs/raceways-and-conduit]].
+### Electrical connections to isolated equipment shall be made with a length of flexible conduit looped to accommodate the equipment's isolated motion without transmitting vibration into the raceway system; refer to [[sync/raceways-and-conduit]].
−### Ducted connections to isolated air-handling equipment shall include a flexible duct connector at the equipment so that fan vibration is not transmitted into the ductwork; refer to [[syncs/hvac-ductwork]].
+### Ducted connections to isolated air-handling equipment shall include a flexible duct connector at the equipment so that fan vibration is not transmitted into the ductwork; refer to [[sync/hvac-ductwork]].
## Thrust Restraints {toc}
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### Insufficient edge distance is the most common post-installed anchor deficiency near the edge of a housekeeping pad; the pad shall be sized so that every anchor meets the edge distance its evaluation report requires, which is why pads are extended beyond the equipment footprint. {note}
−### Housekeeping pad dimensions and embedded anchorage shall be coordinated with [[syncs/concrete-pads]].
+### Housekeeping pad dimensions and embedded anchorage shall be coordinated with [[sync/concrete-pads]].
### Anchor type datasheet {toc}
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## Spare parts shall be delivered to the Owner in original packaging, each tagged with the corresponding equipment tag, component model, and date of delivery.