BHMA Proposes New Standard for Auxiliary Locks

Feb. 17, 2011

The Builders Hardware Manufacturers Association (BHMA) announces the publication of ANSI/BHMA A156.36 - 2010 American National Standard for Auxiliary Locks.

This standard establishes requirements for auxiliary locks including commercial and residential deadbolts and includes dimensional criteria and five classifications of tests: operational, cycle, strength, security and finishes. This standard was formerly part of ANSI/BHMA A.156.5 for Auxiliary Locks and Associated Products.

Changes to the proposed edition of A156.36-2010 are:

  • New standard resulting from dedicating A156.5 to cylinders, and moving auxiliary locks to their own standard.
  • Revised lock/cylinder interface tests 12.4 through 12.7 and developed corresponding test fixtures based on revising A156.5 to fully evaluate cylinders.
  • The test equipment section was laid out to be consistent with other standards.
  • Warped door test wording was revised to be consistent with the latest standards.
  • Replaced the torque/keybow equation with a torque limit of 33 lbs-in. for all key bows, similarly for turns. Appendix note was added to explain logic for change.
  • Corrected ASTM F476 references throughout.
  • Updated reference standards and test applicability chart.
  • Updated UV test criteria.
  • Created suffix D for use with drill resistant cylinders.

For specifying and purchasing quality Auxiliary Locks which meet the rigorous performance requirements of this standard, refer to the BHMA Certified Products Directory.

For more information, or to purchase additional copies of this or any other standards, please visit BHMA’s bookstore at You can also order standards by phone by calling 800-699-9277. (Purchased standards are available as printed documents or electronic files (PDF) for immediate download.)

About BHMA

The Builders Hardware Manufacturers Association (BHMA) is an industry leader in building safety and security. BHMA is the only organization accredited by the American National Standards Institute (ANSI) to develop and maintain performance standards for locks, closers, exit devices and other builders hardware. The widely known ANSI/BHMA A156 series of standards describes and establishes the features and criteria for specific types of hardware products. In addition, BHMA sponsors third-party certification of hardware products, which is a requirement for a product to bear the “BHMA Certified” mark — ensuring that the product meets the ANSI/BHMA standard. For more information on BHMA, please write to BHMA, 355 Lexington Avenue, Suite 15th Floor, New York, NY, 10017 or visit the Web site at

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