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ANSI B11.0‐2020, Safety of Machinery is considered the center piece for machine safety and risk assessments. It is one of more than 30 standards and technical reports for metal working machinery published by ANSI and B11 Standards, Inc., known as the B11 series. In the absence of machine‐specific standards, ANSI B11.0, along with ANSI B11.19‐2019, Performance Requirements for Risk Reduction Measures: Safeguarding and other Means of Reducing Risk combine to form the foundation for the B11 series of machine‐specific (Type‐C) standards, and for other industrial machinery lacking a machine‐specific safety standard. The B11 standards and technical reports are organized with the ISO A‐B‐C level structure briefly summarized below:

 Type‐A standards (basis standards) provide basic concepts, principles for design, and general aspects that can be applied to machinery.

 Type‐B standards (generic safety standards) address one or more safety aspects or one or more types of safeguards that can be used across a range of machinery.

 Type‐C standards (machinery‐specific safety standards) address detailed safety requirements for a particular machine or group of machines.

Since it applies to an array of machines and contains general requirements, ANSI B11.0 is considered a Type‐A standard. Its applies to new, existing, modified, and rebuilt power‐driven stationary machines used to shape or form materials through cutting, impact, pressure, electrical, and other processing methods. ANSI B11.0 also states that machinery suppliers and users are responsible for defining and achieving acceptable risk and that any risks associated with the operation, maintenance, dismantling, and disposal of machinery shall be reduced to an acceptable level. The standard includes a formal method to conduct and document the risk‐assessment process, and also identifies some preparations that must be made before a risk assessment begins. The standard presents the basic risk‐assessment process in a step‐by‐step approach to assist in achieving this goal.

The ANSI B11.TR3‐2000 (R2015), Risk assessment and risk reduction – A guide to estimate, evaluate and reduce risks associated with machine tools is an ANSI Technical Report. As part of the ANSI B11 series of technical reports and standards, TR3 pertains to the design, construction, care, and use of machine tools. The report defines a method for identifying hazards associated with a particular machine or system when used as intended, and provides a procedure to estimate, evaluate, and reduce the risks of harm to individuals associated with these hazards under the various conditions of use of that machine or system. Examples of tasks and machine hazards, as well as risk‐reduction methods are included in the technical report.

In addition, ANSI has adopted ISO 12100, Safety of Machinery – General Principles for Design – Risk Assessment and Risk Reduction. This standard specifies the basic terminology, principles, and a methodology for achieving safety in the design or machinery. It specifies principles of risk assessment and risk reduction to help designers in achieving this objective. While this is an international standard, it is an ISO standard that safety professionals in the United States should be aware of even if they do not have international responsibilities or involvement.