ANSI B11.0

Safety of Machinery: General Requirements & Risk Assessment

This standard applies to new, modified or rebuilt power driven machines, not portable by hand, used to shape and/or form metal or other materials by cutting, impact, pressure, electrical or other processing techniques, or a combination of these processes.  This can be a single machine, a machine tool or a machine tool system(s).

Other industry sectors may benefit from applying this standard.  Where a machine-specific standard exists and the requirements of that standard conflict with the requirements in this standard, the requirements of the machine-specific standard shall apply.

ANSI B11.0 presents an excellent discussion of the elements and various techniques of risk assessment. It also does the following:

  • Presents a simple means of conducting risk assessment
  • Offers a good review and discussion of the Hierarchy of Control
  • Provides a reintroduction of the ISO 14121 list of Hazards that should be used by anyone conducting risk assessment

What is Considered Tolerable Risk?

In the discussion of risk reduction, the topic of tolerable risk is addressed. Any organization seriously considering risk assessment and trying to determine how to define tolerable risk should look at this document in detail. Tolerable risk gets a lot of discussion and many users don’t know where to start. Consider using this document to get good grounding in Risk Assessment.

Following are the B11.0 considerations for tolerable risk:

  • Risk-reduction benefit;
  • Technological feasibility;
  • Economic impact;
  • Ergonomic impact;
  • Productivity;
  • Durability and maintainability;
  • Usability.

ANSI B11.0 was published in December 2010 and essentially replaces TR3. TR3 is still a document that can be used for Risk Assessment.

If you have further questions regarding ANSI B11.0, contact us today for help.