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5.1WIB6 – Welded Inertia Base

WIB6 - Heavy-duty Welded Inertia Bases are commonly used in the industry to reduce the amplitude of mechanical vibrations, lower the center of gravity, and lessen the equipment’s movement during operations. WIB6, when filled with concrete and supported by Vibrasystems’ spring mounts, provides excellent vibration isolation. WIB6 - Welded Inertia Bases are designed according to ASHRAE guidelines. Made from structural steel C Channels and reinforced with welded steel square bars each WIB6 has welded brackets to install spring mounts under them. Welded Inertia Bases are finished with a rustproof primer and a topcoat paint. 

Recommended for:

HVAC equipment such as air compressors, vacuum pumps, close-coupled pumps, inline pumps, end suction pumps, double suction pumps, package pump systems, axial fans, plenum fans, centrifugal fans, engine-driven generators, packaged Air Handler Unit, packaged Air Conditioner Unit, industrial centrifuges, etc.

Welded-in reinforcing bars provide rigidity to the welded structural steel perimeter frame.
Rustproof Primer + topcoat paint provide good corrosion resistance.
Templates with anchor bolts are optional.
Seismic Restrained Spring Mounts are supplied with the WIB6 - Inertia Base and available in 1” & 2” deflection springs.
Inertia Base’s height must be a minimum of 1/10 of the longest span between spring isolators, but not less than 6”.
Inertia Base’s weight (frame + concrete) should be 2 times the total installed equipment’s weight.
Concrete minimum 3,000 psi strength and density of 150 lb/cub. ft (concrete by others).
After WIB6’s installation is complete, the frame should have a minimum operating clearance of 1” to the floor.

Click Here for Seismic Restrained Spring Mounts:

Related Products
Please contact us for larger volume orders as further discounts may apply.
ModelDimensions in inches (in)Approximate Weight in Pounds (lbs)Price
ModelWidth (in)Length (in)Height (in)Frame (lbs)Concrete (lbs)Frame + Concrete (lbs)PriceQuantityTotal
WIB6 - Welded Inertia Base
WIB6 24X4824486135550685      
WIB6 24X6024606155700855      
WIB6 30X5430546160780940      
WIB6 30X60306061708801,050      
WIB6 36X60366061901,0501,240      
WIB6 36X72367262151,2801,495      
WIB6 48X60486062201,4001,620      
WIB6 48X72487262501,7001,950      
Note: When product price is not shown, please call our office for technical consultation prior to place an order


a) Custom sizes can be supplied upon request. 
b) Concrete’s weight - assuming minimum 3,000 psi strength and density of 150 lb/cub.ft (concrete by others).
c) Please see submittal drawing and Installation Instructions for more information.