I am the chair of B11.0 and I'd like to share a bit of its storyB11 refers to the machine tool community.  ANSI B11.1 was the original B11 standard and was first published in 1913.  Currently there are over 30 standards and technical reports published by the B11 community. The most recent addition to the B.11 standards collection is ANSI B11.0 and pertains to the safety of machinery. 

The genesis of the current document can be traced back to late 1995 and the first meeting of what became ANSI B11 Technical Report #3 or more commonly known as B11 TR3.  This meeting kicked off the development of a technical report on risk assessment. This effort was a direct result of the pending publication of EN 1050 on risk assessment in the EU. The purpose of TR3 was to form a single committee to write a US based risk assessment guide that could be used and referenced by the more than twenty B11 standards committees.  This precluded each individual standard committee writing its own requirements.