Safety Requirements for Large MachinesB11.25-2015.pdfv . Foreword (This Foreword is not part of the requirements of American National Standard B11.25-2015) Automated machines are made

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ANSI B11.25–2015

American National Standard for Machines –

Safety Requirements for Large Machines

Secretariat and Accredited Standards Developer: B11 Standards, Inc. POB 690905 Houston, TX 77269 Approved: 7 APRIL 2015 by the American National Standards Institute

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AMERICAN NATIONAL STANDARDS By approving this American National Standard, the ANSI Board of Standards Review confirms that the requirements for due process, consensus, balance and openness have been met by B11 Standards, Inc. (the ANSI-accredited standards developing organization). American National Standards are developed through a consensus process. Consensus is established when substantial agreement has been reached by directly and materially affected interests. Substantial agreement means much more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that a concerted effort be made toward resolution. This process brings together volunteers and/or seeks out the views of persons who have an interest in the topic covered by this publication. While B11 Standards, Inc. administers the process and establishes procedures to promote fairness in the development of consensus, it does not write the document and it does not independently test, evaluate or verify the accuracy or completeness of any information or the soundness of any judgments contained in its standards or guidelines. American National Standards are promulgated through ANSI for voluntary use; their existence does not in any respect preclude anyone, whether they have approved the standards or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the standards. However, users, distributors, regulatory bodies, certification agencies and others concerned may apply American National Standards as mandatory requirements in commerce and industry. The American National Standards Institute does not develop standards and will in no circumstances give an interpretation of an American National Standard. Moreover, no person shall have the right or authority to issue an interpretation of an American National Standard in the name of the American National Standards Institute. Requests for interpretations should be addressed to the Secretariat (B11 Standards, Inc.). B11 STANDARDS, INC. MAKES NO WARRANTY, EITHER EXPRESSED OR IMPLIED AS TO THE FITNESS OF MERCHANTABILITY OR ACCURACY OF THE INFORMATION CONTAINED WITHIN THIS STANDARD, AND DISCLAIMS AND MAKES NO WARRANTY THAT THE INFORMATION IN THIS DOCUMENT WILL FULFILL ANY OF YOUR PARTICULAR PURPOSES OR NEEDS. B11 STANDARDS, INC. DISCLAIMS LIABILITY FOR ANY PERSONAL INJURY, PROPERTY OR OTHER DAMAGES OF ANY NATURE WHATSOEVER, WHETHER SPECIAL, INDIRECT, CONSEQUENTIAL OR COMPENSATORY, DIRECTLY OR INDIRECTLY RESULTING FROM THE PUBLICATION, USE OF, APPLICATION OR RELIANCE ON THIS DOCUMENT. B11 STANDARDS, INC. DOES NOT UNDERTAKE TO GUARANTEE THE PERFORMANCE OF ANY INDIVIDUAL MANUFACTURER OR SELLER’S PRODUCTS OR SERVICES BY VIRTUE OF THIS STANDARD OR GUIDE, NOR DOES IT TAKE ANY POSITION WITH RESPECT TO THE VALIDITY OF ANY PATENT RIGHTS ASSERTED IN CONNECTION WITH THE ITEMS WHICH ARE MENTIONED IN OR ARE THE SUBJECT OF THIS DOCUMENT, AND B11 STANDARDS, INC. DISCLAIMS LIABILITY FOR THE INFRINGEMENT OF ANY PATENT RESULTING FROM THE USE OF OR RELIANCE ON THIS DOCUMENT. USERS OF THIS DOCUMENT ARE EXPRESSLY ADVISED THAT DETERMINATION OF THE VALIDITY OF ANY SUCH PATENT RIGHTS, AND THE RISK OF INFRINGEMENT OF SUCH RIGHTS, IS ENTIRELY THEIR OWN RESPONSIBILITY. In publishing or making this document available, B11 Standards, Inc. is not undertaking to render professional or other services for or on behalf of any person or entity, nor is B11 Standards, Inc. undertaking to perform any duty owed by any person or entity to someone else. Anyone using this document should rely on his or her own independent judgment, or as appropriate, seek the advice of a competent professional in determining the exercise of reasonable care in any given circumstances. B11 Standards, Inc. has no power, nor does it undertake to police or enforce conformance to the requirements of this document. B11 Standards, Inc. does not certify, test or inspect products, designs, or installations for safety or health purposes. Any certification or other statement of conformance to any health or safety-related information in this document shall not be attributable to B11 Standards, Inc. and is solely the responsibility of the certifier or maker of the statement. NOTICE: This American National Standard may be revised or withdrawn at any time. The procedures of the American National Standards Institute require that action be taken periodically to reaffirm, revise, or withdraw this standard. You may contact the Secretariat for current status information on this, or other B11 standards.

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Table of Contents Page

Contents

FOREWORD ............................................................................................................................................................................ V

INTRODUCTION .................................................................................................................................................................. IX

1 SCOPE .............................................................................................................................................................................. 10

1.1 EXCLUSIONS ............................................................................................................................................................... 10

2 NORMATIVE REFERENCES ...................................................................................................................................... 11

3 DEFINITIONS ................................................................................................................................................................. 13

4 RESPONSIBILITY ......................................................................................................................................................... 13

4.1 SUPPLIER RESPONSIBILITIES ....................................................................................................................................... 13 4.2 USER RESPONSIBILITIES .............................................................................................................................................. 14 4.3 MODIFIER RESPONSIBILITIES ...................................................................................................................................... 14 4.4 PERSONNEL RESPONSIBILITIES .................................................................................................................................... 14

5 RISK ASSESSMENT PROCESS ................................................................................................................................... 14

5.1 GENERAL .................................................................................................................................................................... 14 5.2 TASKS ......................................................................................................................................................................... 16 5.3 POTENTIAL HAZARDS ................................................................................................................................................. 17

5.3.1 Reasonably foreseeable hazards ........................................................................................................................ 17 5.3.2 Hazards not associated with tasks ..................................................................................................................... 18

6 DESIGN, CONSTRUCTION, RECONSTRUCTION, AND MODIFICATION ....................................................... 19

6.1 GENERAL REQUIREMENTS FOR LARGE MACHINES ....................................................................................................... 19 6.2 RISK REDUCTION MEASURES ...................................................................................................................................... 20

6.2.1 Hydraulic / pneumatic aspects ........................................................................................................................... 20 6.2.2 Troubleshooting, set-up or maintenance ........................................................................................................... 21 6.2.3 Entrapment ........................................................................................................................................................ 21 6.2.4 Tripping hazards ................................................................................................................................................ 21 6.2.5 Lighting .............................................................................................................................................................. 22 6.2.6 Concurrent tool changes .................................................................................................................................... 22 6.2.7 Stopping time / distance ..................................................................................................................................... 22 6.2.8 Part transfer....................................................................................................................................................... 22 6.2.9 Moving work station .......................................................................................................................................... 22

6.3 LADDERS, WORK PLATFORMS, AND WALKWAYS ......................................................................................................... 22 6.4 ENTERING THE WORKING ENVELOPE .......................................................................................................................... 24 6.5 TOTALLY ENCLOSED LARGE MACHINES ...................................................................................................................... 25

6.5.1 Risk reduction measures .................................................................................................................................... 25 6.6 LAYOUT DESIGN REQUIREMENTS ................................................................................................................................ 25 6.7 ELECTRICAL EQUIPMENT REQUIREMENTS ................................................................................................................... 26

6.7.1 Grounding and shielding ................................................................................................................................... 26 6.7.2 Interferences ...................................................................................................................................................... 26 6.7.3 Fluctuation or interruption of power sources .................................................................................................... 26

6.8 MODES OF OPERATION ................................................................................................................................................ 26 6.8.1 Automatic mode(s) ............................................................................................................................................. 26 6.8.2 Manual mode(s) ................................................................................................................................................. 27 6.8.3 Mode design ....................................................................................................................................................... 27 6.8.4 Mode selection ................................................................................................................................................... 27 6.8.5 Process observation ........................................................................................................................................... 28

6.9 LOCAL CONTROL ........................................................................................................................................................ 28



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6.10 ISOLATION OF POWER SOURCES .................................................................................................................................. 29 6.11 STORED ENERGY ......................................................................................................................................................... 29 6.12 CONTROL OF GRAVITY INDUCED MOTION ................................................................................................................... 30 6.13 EMERGENCY MOVEMENT ............................................................................................................................................ 30 6.14 PERFORMANCE OF THE SAFETY–RELATED PARTS OF THE CONTROL SYSTEM............................................................... 30 6.15 CONTROL SYSTEM RESET ............................................................................................................................................ 30 6.16 SYSTEM STARTING/RESTARTING ................................................................................................................................. 31 6.17 EMERGENCY STOP ...................................................................................................................................................... 31

6.17.1 Emergency stop function .................................................................................................................................... 31 6.17.2 Emergency stop devices ..................................................................................................................................... 32 6.17.3 Recovery from emergency stop .......................................................................................................................... 32

6.18 FLUID IMPACT ON OPERATING ENVIRONMENT AND EQUIPMENT ................................................................................. 32 6.18.1 Slip hazard ......................................................................................................................................................... 32

6.19 MECHANICAL EQUIPMENT REQUIREMENTS ................................................................................................................. 33 6.19.1 Power transmission components ........................................................................................................................ 33 6.19.2 Powered moving parts ....................................................................................................................................... 33 6.19.3 Broken or falling machine components or equipment ....................................................................................... 33 6.19.4 Contact with high-temperature surfaces or components ................................................................................... 33 6.19.5 Contact with sharp edges, corners, and projections .......................................................................................... 33

6.20 SAFEGUARDING DESIGN REQUIREMENTS .................................................................................................................... 34 6.21 EJECTED PARTS OR FLUIDS ......................................................................................................................................... 34 6.22 VIEWING PANELS/WINDOWS ....................................................................................................................................... 35 6.23 STRUCTURAL INTEGRITY ............................................................................................................................................ 35 6.24 NOISE ......................................................................................................................................................................... 35 6.25 ERGONOMIC CONSIDERATIONS ................................................................................................................................... 36 6.26 LOCATION OF AWARENESS DEVICES ........................................................................................................................... 36 6.27 ERRORS OF FITTING .................................................................................................................................................... 36 6.28 MACHINE STABILITY .................................................................................................................................................. 36 6.29 DOCUMENTATION REQUIREMENTS ............................................................................................................................. 36 6.30 REQUIREMENTS FOR REBUILD OR MODIFICATIONS ..................................................................................................... 37

7 LAYOUT, INSTALLATION, TESTING & START-UP ............................................................................................. 38

7.1 LAYOUT ...................................................................................................................................................................... 38 7.2 LIFTING OF SYSTEM COMPONENTS .............................................................................................................................. 39 7.3 INSTALLATION ............................................................................................................................................................ 40

7.3.1 Installation personnel ........................................................................................................................................ 40 7.3.2 Transport into and through a facility ................................................................................................................. 41 7.3.3 Floor loading ..................................................................................................................................................... 41 7.3.4 Machine mounting ............................................................................................................................................. 41 7.3.5 Electrical requirements for installation ............................................................................................................. 41 7.3.6 Isolation of power sources ................................................................................................................................. 41 7.3.7 Lighting .............................................................................................................................................................. 42 7.3.8 Lockout / tagout / verify during installation ...................................................................................................... 42

7.4 TESTING AND START-UP ............................................................................................................................................. 42

8 SAFEGUARDING ........................................................................................................................................................... 43

8.1 GENERAL .................................................................................................................................................................... 43 8.1.1 Point of operation .............................................................................................................................................. 43 8.1.2 Unexpected release of energy ............................................................................................................................ 43 8.1.3 Moving hazard zone ........................................................................................................................................... 43 8.1.4 Points of entry .................................................................................................................................................... 43 8.1.5 Suitability for application .................................................................................................................................. 44 8.1.6 Safe distance safeguarding ................................................................................................................................ 44 8.1.7 Operator control station location(s) .................................................................................................................. 44 8.1.8 Entrapment ........................................................................................................................................................ 44 8.1.9 Elevation changes .............................................................................................................................................. 44 8.1.10 Slips and falls ..................................................................................................................................................... 44

8.2 VIEWING PANELS / TRANSPARENT GUARDS ................................................................................................................ 45 8.3 ACTIVATION OF SAFETY CONTROL SYSTEM ................................................................................................................ 45



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8.4 OPERATOR LOCATION ................................................................................................................................................. 46 8.5 PENDANT CONTROL .................................................................................................................................................... 46 8.6 SUSPENSION OF SAFEGUARD ....................................................................................................................................... 46 8.7 CLEARING THE MACHINE ENVELOPE ........................................................................................................................... 46 8.8 NOISE ......................................................................................................................................................................... 46 8.9 FIRE SUPPRESSION / ATMOSPHERE DIFFERENTIALS / CONFINED SPACE ........................................................................ 46 8.10 SAFEGUARDING AT THE PERIMETER............................................................................................................................ 47 8.11 SAFETY-RELATED SPAN OF CONTROL ......................................................................................................................... 47 8.12 SAFETY-RELATED SYSTEM RESET ............................................................................................................................... 47

9 SET-UP, OPERATION AND MAINTENANCE .......................................................................................................... 49

9.1 GENERAL .................................................................................................................................................................... 49 9.2 MACHINE SET-UP PROCEDURES .................................................................................................................................. 49 9.3 OPERATION................................................................................................................................................................. 50 9.4 MAINTENANCE ........................................................................................................................................................... 51

9.4.1 Maintenance procedures .................................................................................................................................... 51 9.4.2 Maintenance inspections .................................................................................................................................... 52

9.5 SUPERVISION .............................................................................................................................................................. 53 9.6 CONTROL OF HAZARDOUS ENERGY ............................................................................................................................. 53

9.6.1 Isolation of power sources ................................................................................................................................. 54 9.6.2 Routine servicing and maintenance ................................................................................................................... 54 9.6.3 Non-routine servicing and maintenance ............................................................................................................ 55

9.7 INITIATION OF PRODUCTION OPERATIONS ................................................................................................................... 55 9.8 SAFETY SIGNS ............................................................................................................................................................. 55 9.9 PERSONAL PROTECTIVE EQUIPMENT (PPE) ................................................................................................................. 55

10 TRAINING ................................................................................................................................................................... 56

10.1 GENERAL .................................................................................................................................................................... 56 10.2 TRAINING ELEMENTS .................................................................................................................................................. 56

10.2.1 Training program(s) .......................................................................................................................................... 57 10.2.2 Trainer qualifications ........................................................................................................................................ 58

10.3 OPERATOR TRAINING .................................................................................................................................................. 59 10.4 MAINTENANCE PERSONNEL TRAINING ........................................................................................................................ 59 10.5 SUPERVISOR TRAINING ............................................................................................................................................... 59 10.6 RETRAINING ............................................................................................................................................................... 60

ANNEX A – LARGE MACHINES AND OSHA .................................................................................................................. 61

ANNEX B – GENERAL GUIDELINES FOR OPERATOR TRAINING .......................................................................... 62

ANNEX C – SOME EXAMPLE LARGE MACHINES....................................................................................................... 65



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Foreword (This Foreword is not part of the requirements of American National Standard B11.25-2015) Automated machines are made in many sizes and configurations. As machines and machining centers increase in size, function and capacity, new hazards arise and new risks are introduced. In particular, personnel are typically required to enter into the work envelope of large machines. Many machines have a work envelope of 1 m3 (meter of travel) or less and often are fully enclosed. The probability that personnel could enter the enclosure with the machine in operation is very low. Machines with a 2 m3 work envelope (travel envelope) have a somewhat increased risk of personnel entering the work envelope. Machines larger than a 2 m3 work envelope are often not enclosed and in many cases, there is an actual or perceived need that entry into the work envelope is required to perform certain tasks. Risk reduction measures developed and applied for smaller machines typically focus on prohibiting machining processes and hazardous motions when personnel are in the work envelope. However, such approaches may not be practicable or effective for larger machines. For example, perimeter fencing with safety interlocked access gates, light curtains, and/or area laser scanners to stop machining processes are often used in robotic and machining cells. These approaches applied to larger machines will likely be defeated as tasks are required to be performed within the machine work envelope and in some cases can be performed concurrent with machining with minimal risk of harm. Large machines typically require much higher levels of, and greater reliance on, training and administrative controls than similar smaller machines. Due to the dependence on proper procedures for the safety of personnel and equipment, operators of large machines tend to require additional training (more than what would be considered ‘typical’), greater discipline, and more experience with machinery in general. The fundamental problems with large machinery are keeping people out of the machine when there is a risk of significant harm, and keeping components, parts, tooling and swarf from being ejected. A further complication with large machines is that often the machining application involves unique or particular hazards that are not easily addressed in a standard separate from the context specific application concerns. This standard addresses these concerns. HISTORY This is the first edition of this B11.25 standard, which would be generally considered as a Type-B standard, but could potentially be considered by some as a Type-C standard. It has been developed to integrate with the broader B11.0 (Type-A) standard on general safety/risk assessment and the B11.19 (Type-B) standard on safeguarding. The B11 series of standards for machines began with safety requirements for power presses in 1922. Since that time, safety standards/requirements for a variety of machines have been developed and continually updated and revised to become a series of some three dozen B11 standards and technical reports. This series contains Type-A standards such as B11.0 and ANSI/ISO 12100 on broad/general safety requirements, Type-B standards such as B11.19 and all of the B11 technical reports dealing with broad safety aspects such as safeguarding, ergonomics, lean/safety integration and noise, and Type-C standards addressing specific machine types or groups or like machines. Correlation to ISO standards At the date of publication, there is no known ISO standard that specifically applies to the general classification of large machines. There may be one or more ISO C-level standards that apply to specific machines that include large sizes, but there is no general ISO standard for large machines. EFFECTIVE DATE The following information on effective dates is informative guidance only, and not a normative part of this standard. The B11.25 subcommittee recognizes that some period of time after the approval date on the title page of this document is necessary for suppliers and users to develop new designs, or modify existing designs or manufacturing processes in order to incorporate the new or revised requirements of this standard into their product development or production system.



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This subcommittee recommends that suppliers complete and implement design changes for new machines and machinery systems within 30 months of the approval of this standard. The B11.25 subcommittee recommends that users evaluate whether existing machinery and machinery systems have acceptable risk within 30 months of the approval date of this standard using generally recognized risk assessment methods. If the risk assessment shows that modification(s) is necessary, refer to the requirements of this standard to implement risk reduction measures (risk reduction measures) for appropriate risk reduction. Explanation of the format, and ANSI B11 conventions

The standard uses a two-column format to provide supporting information for requirements. The material in the left column is confined to “Standards Requirements” only, and is so captioned. The right column, captioned "Explanatory Information" contains information that the writing Subcommittee believed would help to clarify the requirements contained in the standard. This column should not be construed as being a part of the requirements of this American National Standard. Operating rules (safe practices) are not included in either column of this standard unless they are of such nature as to be vital safety requirements, equal in weight to other requirements, or guides to assist in compliance with the standard. As in all American National Standards, the term “SHALL” denotes a requirement that is to be strictly followed in order to conform to this standard; no deviation is permitted. The term “SHOULD” denotes a recommendation, a practice or condition among several alternatives, or a preferred method or course of action. Similarly, the term “CAN” denotes a possibility, ability or capability, whether physical or causal, and the term “MAY” denotes a permissible course of action within the limits of the standard. B11 conventions: Operating rules (safe practices) are not included in either column of this standard unless they are of such nature as to be vital safety requirements, equal in weight to other requirements, or guides to assist in conformance with the standard. The B11 standards generally use the term “OR” as an inclusive disjunction, meaning one or the other or both, but on occasion will use the term “and/or” to emphasize the fact that both are fully intended in cases where the Subcommittee believed it was imperative to make that clear. A distinction between the terms “individual” and “personnel” is drawn. Individual includes personnel (employees, subcontractors, consultants, or other contract workers under the indirect control of the supplier or user) but also encompasses persons who are not under the direct or indirect control of the supplier or user (e.g., visitors, vendors, etc.).



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DEVELOPMENT This standard was prepared by the B11.25 Subcommittee, processed and submitted for ANSI approval by the B11 Accredited Standards Committee on Safety Standards for Machines. Committee approval of this standard does not necessarily imply that all committee members voted for its approval. At the time this standard was approved as an American National Standard, the ANSI B11 Accredited Standards Committee was composed of the following Members: Alan Metelsky, Chairman Barry Boggs, Vice-Chairman David Felinski, Secretary Organizations Represented Name of Representative Delegate Alternate Aluminum Extruders Council Melvin Mitchell Scott Burkett American Society of Safety Engineers Bruce Main, PE, CSP George Karosas, PE, CSP Association For Manufacturing Technology Russell Bensman Alan Metelsky The Boeing Company Don Nelson Will Wood Canadian Standards Association Jill Collins Walter Veugen Deere & Co. Gary Kopps Scott Fowler FDR Safety Michael Taubitz Flavius Brown General Motors Corporation Michael Douglas Graham Parr Komatsu America Industries George Schreck James Landowski Liberty Mutual Stanford Brubaker John Russell, PE, CSP Metal Powder Industries Federation Dennis R. Cloutier, CSP Teresa Stillman National Institute for Occupational Safety & Health Richard Current, PE James Harris, PhD, PE Occupational Safety & Health Administration Kenneth Stevanus Robert Bell Omron Scientific Technologies Incorporated Frank Webster Tina Hull Packaging Machinery Manufacturers Institute Charles (Fred) Hayes Maria Ferrante Pilz Automation Safety, LP Michael Beerman Lee Burk Precision Metalforming Association James Barrett, Jr. PhD Bill Gaskin / Christen Carmigiano Presence-sensing Device Manufacturers Association James V. Kirton Michael Carlson Robotic Industries Association Pat Davison Jeffrey Fryman Rockwell Automation Patrick Barry Michael Miller Safe-T-Sense Chris Gerges Douglas Rable SICK, Inc. Chris Soranno Mark Nehrkorn Sheet Metal & Air Conditioning Contractors Nat’l. Assn. Michael McCullion Roy Brown Society of the Plastics Industry David Palmer Stan Glover Toyota Motor Manufacturing North America Barry Boggs Todd Mills



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At the time this standard was approved, the ANSI B11.25 Large Machines Subcommittee had the following members who participated in the development of this standard:

Name

Organization

Willard Wood, Chairman Boeing Bruce Main, Vice-Chairman design safety engineering David Felinski, Secretary B11 Standards Barry Boggs Toyota Lance Chandler Boeing Sam Dobbs Boeing George Karosas ESI Heinz Knackstedt C&E Sales, Inc. Alan Metelsky Gleason Don Nelson Boeing Ted Sberna Applied Engineering Concepts Chris Soranno SICK Michael Taubitz FDR Safety



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Introduction The primary purpose of every machine tool is to process parts. This is accomplished by the machine imparting process energy onto the workpiece. Inadvertent interference with, or accidental misdirection of the released energy during production, maintenance, commissioning and de-commissioning may result in injury. The purpose of the ANSI B11 series of machine tool safety standards is to devise and propose ways to minimize risks of the potential hazards. This can be accomplished by an appropriate machine design, by restricting personnel or other individuals’ access to hazard areas, and by devising work procedures to minimize personnel exposure to hazardous situations. This is the essence of the ANSI B11 series of safety standards. The responsibility for the alleviation of these risks is divided between the equipment supplier, its user and its operating personnel, as follows (numbers in parentheses refer to the clause numbers in these standards which address that responsibility):



AMERICAN NATIONAL STANDARD B11.25–2015

STANDARD REQUIREMENTS EXPLANATORY INFORMATION

10 © 2015 B11 Standards, Inc.

American National Standard for Machine Tools –

Safety Requirements for Large Machines STANDARD REQUIREMENTS EXPLANATORY INFORMATION

(This column is not part of the requirements of this American National Standard for Machine Tools – Safety Requirements for Large Machines, ANSI B11.25-2015).

1 Scope E1 This standard applies to machines with a work envelope equal to or greater than two cubic meters (2 m3) or two meters of linear axis travel, or where personnel are regularly required to enter into the working envelope to perform work or tasks.

Entering into the “working envelope” typically means walking or stepping into the envelope, as opposed to accessing the area with a hand or arm.

The requirements in this standard apply to all large machines, unless they are specifically covered in or by another standard. This document is intended to be used with both ANSI B11.0 and ANSI B11.19 to execute the risk assessment process and the safeguarding of machinery respectively.

This standard may be used for machines that are purposely excluded from other standards due to size, e.g., ANSI B11.22 or B11.23, or large machines for which there is no type-C, machine specific standard. This could include machines purposely exempted from other standards, or large machines for which there are no type-C standards.

Examples may include stretch presses, measurement machines, water jets, laser cutting machines and specialty machines. Additional requirements for machine types of smaller size contained in other standards may also apply, such as B11.22 and B11.23.

1.1 Exclusions E1.1 The requirements of this standard do not apply to machines with a work envelope less than two cubic meters (2 m3) or two meters of linear axis travel. Exception: See explanatory note regarding B11.23.

Until B11.23 is amended to include up to two cubic meters work envelope this standard will apply to work envelopes greater than 1 cubic meter and 1 meter of linear axis travel.

The requirements of this standard do not apply to turning machines and turning centers designed to accept work holding devices less than 500 mm (20 inches) outside diameter and with a distance between centers less than 2 meters (80 inches).

See also, ANSI B11.22.



Documents

Safety Requirements for Large MachinesB11.25-2015.pdfv . Foreword (This Foreword is not part of the requirements of American National Standard B11.25-2015) Automated machines are made