BHMA A156-12:2018 pdf download.INTERCONNECTED LOCKS
3. GENERAL
3.1 Cylinders and Input Devices for Locks Cylinders supplied or mated with locks shall meet the performance requirements for the appropriate cylinder types and grade level found in the ANSI/BHMA Standard A 156.5-2014 for Cylinders and Input Devices for the lock to retain its grade listing. Assemblies take the grade level of the lowest graded component. Other mechanisms are permitted to be used in lieu of cylinders providing the performance and security criteria are equivalent to that of cylinders. Suffix D shall be indicated in the certified products directory for locks to he used only with drill resistance cylinders as evaluated in A 156.5 -2014.
3.2 Tolerances Where only minus tolerances are given, the dimensions are permitted to be exceeded at the option of the manufacturers. All values which do not carry specific tolerances or are not marked maximum or minimum shall have the following tolerances: Linear dimensions shall be ± 1/16 in. (1.6 mm). Weight or force shall be ± 2%. Angles shall be ± 2 degrees.
3.3 Door and Frame Preparation The lock models described in this standard shall lit the door and frame preparations described in the ANSIJBHMA A 156.115 Series. Other configurations are permitted to fit special opening templating requirements. See manufacturers’ instructions for details.
3.4 Operating Trim Where levers are referenced, knobs, paddles, or handlesets are permitted to he used, except for tests which apply to specific trim.
3.5 Trim Roses, escutcheons, knobs, levers, turns, paddles, and cylinder guards shall cover all door preparation openings.
3.6 No lock can provide complete security by itself. Locks may be defeated by forcible or technical means, or evaded by entry elsewhere on the property. No lock can substitute for caution, awareness of your environment, and common sense. Builders hardware is available in multiple performance grades to suit the application. In order to enhance security and reduce risk, consult a qualified locksmith or other security professional. For applications where pick resistance and other higher security protections are required users should consider locks meeting UL 437 or ANSI/BHMA A 156.30-2014 for High Security Cylinders.
3.7 Reference to other Standards Referenced standards are available from www.buildershardware.com. www.ansi.org. www.astm.org. and www.ul.com.
3.8 Values Required values in this Standard are given in US units. The SI (metric) equivalents are approximate.
3.9 Dead Latching When any function of a lock combines a dead bolt and auxiliary dead latch, the auxiliary dead latch shall be effective whenever the dead bolt is projected or the outside lever or knob is locked.
3.10 Building Codes Certain lock functions described in this standard arc not permitted on doors within a means of egress. Consult local authority having jurisdiction. When locks and latches are used in fire door assemblies, they shall have been tested and listed for use in fire doors by a Nationally Recognized Testing Laboratory (NRTL) and shall be under an in-plant follow-up inspection service.BHMA A156-12 pdf download.