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ACI 351.3R-04
Chapters 1 to 3 have been excerpted for use
with the ACI CEU Online Program.
Foundations for Dynamic Equipment
Reported by ACI Committee 351
James P. Lee*
Yelena S. Golod*
William L. Bounds*
Fred G. Louis
Abdul Hai Sheikh
William D. Brant
Jack Moll
Anthony J. Smalley
Shu-jin Fang
Ira W. Pearce
Shraddhakar Harsh
Andrew Rossi
Charles S. Hughes
Robert L. Rowan, Jr.‡
Erick Larson
William E. Rushing, Jr.
Members of the editorial subcommittee.

Chair of subcommittee that prepared this
‡Past chair.
Philip A. Smith
W. Tod Sutton†
F. Alan Wiley
This report presents to industry practitioners the various design criteria
and methods and procedures of analysis, design, and construction applied
to dynamic equipment foundations.
Keywords: amplitude; concrete; foundation; reinforcement; vibration.
Chapter 1—Introduction, p. 351.3R-2
Chapter 2—Foundation and machine types,
p. 351.3R-4
2.1—General considerations
ACI Committee Reports, Guides, Standard Practices, and
Commentaries are intended for guidance in planning,
designing, executing, and inspecting construction. This
document is intended for the use of individuals who are
competent to evaluate the significance and limitations of its
content and recommendations and who will accept
responsibility for the application of the material it contains.
The American Concrete Institute disclaims any and all
responsibility for the stated principles. The Institute shall not
be liable for any loss or damage arising therefrom.
Reference to this document shall not be made in contract
documents. If items found in this document are desired by the
Architect/Engineer to be a part of the contract documents, they
shall be restated in mandatory language for incorporation by
the Architect/Engineer.
It is the responsibility of the user of this document to
establish health and safety practices appropriate to the specific
circumstances involved with its use. ACI does not make any
representations with regard to health and safety issues and the
use of this document. The user must determine the
applicability of all regulatory limitations before applying the
document and must comply with all applicable laws and
regulations, including but not limited to, United States
Occupational Safety and Health Administration (OSHA)
health and safety standards.
2.2—Machine types
2.3—Foundation types
Chapter 3—Design criteria, p. 351.3R-7
3.1—Overview of design criteria
3.2—Foundation and equipment loads
3.3—Dynamic soil properties
3.4—Vibration performance criteria
3.5—Concrete performance criteria
3.6—Performance criteria for machine-mounting systems
3.7—Method for estimating inertia forces from multicylinder machines
Chapter 4—Design methods and materials,
p. 351.3R-26
4.1—Overview of design methods
4.2—Impedance provided by the supporting media
4.3—Vibration analysis
4.4—Structural foundation design and materials
4.5—Use of isolation systems
4.6—Repairing and upgrading foundations
4.7—Sample impedance calculations
Chapter 5—Construction considerations,
p. 351.3R-53
5.1—Subsurface preparation and improvement
5.2—Foundation placement tolerances
5.3—Forms and shores
5.4—Sequence of construction and construction joints
5.5—Equipment installation and setting
5.7—Concrete materials
5.8—Quality control