CIB-H Inertia Base Frame

CIB-H Inertia Base Frame


Model CIB-H inertia base frames, when filled with concrete and supported by proper noise and vibration isolators, provide outstanding equipment isolation, support, anchorage, and vibration amplitude control.

Model CIB-H inertia base frames incorporate welded structural steel channel perimeter frames of sizes and depths specified. Also included are steel isolator brackets, welded-in steel reinforcing rods, and equipment anchor bolts, if required.

Standard Model CIB-H inertia base frames are available in thicknesses of 6 in (152 mm), 8 in (203 mm), 10 in (254 mm) and 12 in (305 mm), and include height saving isolator mounting brackets for use with high deflection springs.

Standard steel reinforcing rods are 1/2 in (13 mm) diameter and located on 8 in (203 mm) centers each way. Pre-located equipment anchor bolts (optional) are fixed into proper location.

Model CIB-H inertia base frames minimize installation time and job site labor by arriving at the job site completely assembled and ready to fill with concrete.


Model CIB-H inertia base frames are specifically designed and engineered to receive poured concrete, and support mechanical equipment requiring a reinforced concrete inertia base.

Inertia bases are used to support mechanical equipment, reduce vibration amplitude, provide for attachment of vibration isolators, prevent differential movement between driving and driven members, reduce rocking by lowering equipment center of gravity, reduce motion of equipment during start-up and shut-down, act to reduce reaction movement due to operating loads on equipment, and act as a partial noise barrier.

Typically, Model CIB-H inertia base frames are used with poured concrete, and supported by noise and vibration isolators for reciprocating air and refrigeration compressors, chillers, heat pumps, close-coupled pumps, base-mounted pumps, centrifugal fans, internal combustion engines and similar types of equipment.

CIB-H inertia base frames are specified for projects requiring base sizes not covered by CIB-L inertia base frames.