1、ANSI/BHMA A156.24-2012 Revision of BHMA A156.24 - 2003 STANDARD FOR DELAYED EGRESS LOCKING SYSTEMS SPONSOR BUILDERS HARDWARE MANUFACTURERS ASSOCIATION, INC. AMERICAN NATIONAL STANDARDS INSTITUTE Approved December 12, 2012 2 AMERICAN NATIONAL STANDARD An American National Standard implies a consensus
2、 of those substantially concerned with its scope and provisions. An American National Standard is intended as a guide to aid the manufacturer, the consumer and the general public. The existence of an American National Standard does not in any respect preclude anyone, whether they have approved the S
3、tandard or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the Standard. American National Standards are subject to periodic review and users are cautioned to obtain the latest editions. CAUTION NOTICE: This American National Standard may
4、 be revised or withdrawn at any time. The procedures of the American National Standards Institute require that action be taken to reaffirm, revise, or withdraw this standard no later than five years from the date of publication. Purchasers of American National Standards may receive current informati
5、on on all standards by calling or writing The American National Standards Institute. Published by BUILDERS HARDWARE MANUFACTURERS ASSOCIATION, INC. 355 Lexington Avenue, New York, New York, 10017 Copyright 2012 by the Builders Hardware Manufacturers Association, Inc. Not to be reproduced without spe
6、cific authorization from BHMA Printed in the USA 3 This Standard was developed by the Builders Hardware Manufacturers Association, Inc. It was approved by ANSI under the canvass method. BHMA was accredited on 21 March 1983 as a sponsor using the Canvass Method. FOREWORD (This Foreword is not a part
7、of ANSI/BHMA A156.24) The general classification of builders hardware includes a wide variety of items which are divided into several categories. To recognize this diversity, a sectional classification system has been established. This Standard is the result of the collective efforts of members of t
8、he Builders Hardware Manufacturers Association, Inc. (BHMA) who manufacture these products. The total Product Standards effort is therefore, a collection of sections, each covering a specific category of items. Strength, cycle, and operational tests have been established to insure safety and stabili
9、ty to which the public is entitled. There are no restrictions on design. This Standard is not intended to obstruct but rather to encourage the development of improved products, methods and materials. BHMA recognizes that errors will be found, items will become obsolete, and new products and methods
10、will be developed. With this in mind the Association plans to update, correct and revise these Standards on a regular basis. It shall also be the responsibility of manufacturers to request such appropriate revisions. The BHMA numbers that indicate functions of delayed egress locking systems do not i
11、dentify size of design and are not intended to be used without necessary supplementary information. Individual manufacturers catalogs should be consulted. 4 TABLE OF CONTENTS 1. SCOPE 5 2. DEFINITIONS 5 3. GENERAL . 6 4. TEST METHODS . 7 5. TESTS . 7 APPENDIX (NOT A PART OF ANSI/BHMA A156.24) 9 5 1.
12、 SCOPE 1.1 This standard covers products used in connection with conventional exit devices or locks causing the doors to remain locked after releasing actuation for a predetermined length of time. Performance criteria are included for functional, cycle, operational, fail-safe and overload requiremen
13、ts. 1.2 Tests described in this Standard are performed under laboratory conditions. In actual usage, results vary because of installation, maintenance, and environmental conditions. 2. DEFINITIONS 2.1 Delayed Egress Locking Systems A delayed egress locking system consists of a device or combination
14、of devices arranged to be locked in the direction of egress for a predetermined time after the normal releasing process has been initiated. After the predetermined time, the door allows egress. 2.2 Loss of Power Electrical power failure or voltage drop in the building or at the delayed egress lockin
15、g system to the extent that the lock will release. 2.3 Nuisance Delay It is the period of time before the delayed egress cycle begins. It deters initiating the irreversible process of delayed egress in the event of accidental bumping of the door or actuating device. 2.4 Rated Line Voltage. The opera
16、ting voltage specified by the manufacturer of a delayed egress locking system for that lock. 6 3. GENERAL 3.1 When a force, not to exceed 15 lbf (67 N), is continuously applied on the door or release device, an irreversible process shall be initiated after the nuisance delay, that will allow the doo
17、r to be opened after not more than 15 seconds, or 30 seconds as permitted by the AHJ. After the nuisance delay, an audible signal shall be activated in the vicinity of the door equipped with the delayed egress locking system to indicate to the user of the door that the system is operative. 3.2 Delay
18、ed egress locking systems are subject to building, fire, and life safety code requirements. Consult applicable codes for values in effect for nuisance delay duration,release delay duration and other specific requirements. 3.3 Some codes require that when a door equipped with a delayed egress locking
19、 system is opened during unauthorized egress, the delay feature must be reset manually at the door when the door closes. 3.4 The releasing mechanism of delayed egress locking systems shall require only one motion to initiate the irreversible process of opening, and the method of operation shall be o
20、bvious in all lighting conditions. 3.5 Upon loss of power, the time delay feature shall become inoperative and the lock shall allow egress without the delay. Battery back-up systems where permitted, shall not interfere with required emergency release systems. 3.6 Force to operate latch releasing tri
21、m shall be in compliance with the respective BHMA A156 series hardware standard. 3.7 Exit devices, locks or auxiliary locks equipped with a delayed egress feature shall meet the requirements of ANSI/BHMA Standards A156.3-2008 for Exit Devices, A156.5-2010 for Auxiliary Locks, or A156.23-2010 for Ele
22、ctromagnetic Locks as applicable. Component manufacturers using locks or exit devices made by others are permitted to qualify their delayed egress system by testing with a single manufacturers lock. Upon qualification, any manufacturers lock of the same type, and providing it meets the applicable AN
23、SI/BHMA Standard, may be used. 7 3.8 American National Standards referenced in this Standard are available from the American National Standards Institute, 1430 Broadway, New York, NY 10018 or . 3.9 Delayed egress locking systems shall be labeled or listed by a nationally recognized independent testi
24、ng laboratory, and be under the follow-up inspection service of the certifying laboratory. 4. TEST METHODS 4.1 The cycle test shall be performed on a 3 ft by 7 ft by 1 3/4 inch (915 x 2130 x 45 mm) minimum single door of wood or metal with a metal frame. The door and frame shall be rigid enough to h
25、old hardware firmly and to withstand the tests outlined. Provisions shall be made for mounting appropriate measuring devices. A combined calibration and reading accuracy within 5% shall be required for all values. 4.2 Doors shall be hung on heavy-duty anti-friction bearing hinges or pivots. 4.3 A si
26、ze 3 hydraulic door closer shall be applied. 4.4 The delayed egress locking system to be tested shall be as described in 3.9 with an added optional nuisance delay feature, and shall be installed in accordance with the manufacturers published instructions. 4.5 One, same, sample shall be subjected to
27、all of the tests. 5. TESTS 5.1 Cycle Test The door shall be opened by actuating the lock equipped with a 15 second maximum delay feature including a zero to three second pre-delay as described in 3.1. The door shall be allowed to close by action of the door closer. Electrically re-lock the system so
28、 that the time delay is operative. This constitutes one cycle. Repeat for 10,000 cycles. Failure occurs if more than a 15 lbf (67 N) force on the door or release device is required prior to and at the completion of the cycle test or if the lock cannot be released at the end of the 15 second period a
29、t any point during the cycling period. 8 5.2 Operational Voltage Test Test the delayed egress locking system including electrical components at 15% of the rated line voltage to verify the operation. 5.3 Strength Test Apply and maintain 400 lbf. to the door approximately 3 in. (76mm) from the latch e
30、dge and 40 in. (1020 mm) from the floor in the direction of door swing and then actuate the delayed egress locking system. The load shall be maintained for a minimum of five seconds. All latching mechanisms shall be disengaged unless the latching mechanisms are an integral part of the delayed egress
31、 locking system. The load shall be applied until the 15 or 30 second delay period has completed. The load shall then be removed and the door shall not open and the device shall function normally after release of the force. 5.4 Test to Release Under Load With the door closed and the delayed egress lo
32、cking system in the armed state, actuate the delay period. Maintain 250 lbf. for a minimum ten seconds in the direction of door swing, until the delay period ends. For exit devices, the force shall be applied at the center of the actuating surface; for all other types of hardware, release any latchi
33、ng and apply the force approximately 3 in. (76mm) from the latch edge and 40 in. (1020 mm) from the floor. Failure occurs if the door opens prior to the expiration of the delay period or, does not open under load upon expiration of the delay period. 5.5 Immunity Requirements (ESD) All system compone
34、nts which are subject to contact during normal operation shall meet the requirements of IEC 61000-4-2, level 4. 9 APPENDIX (NOT A PART OF ANSI/BHMA A156.24) A-1 Delayed egress locking systems should be used only in buildings protected throughout by an approved automatic fire detection system or an a
35、pproved sprinkler system. Upon the initiation of such systems, the time delay feature should become inoperative and the releasing mechanism of the lock shall operate without the delay. A-2 Signage and emergency lighting are required by the applicable building, life safety, and fire codes adopted by
36、the jurisdiction to be installed on or adjacent to the device. This signage is usually supplied by the delayed egress locking system manufacturer and reads “Push Until Alarm Sounds. Door Can Be Opened in 15 (30) Seconds.“ or similar language. A-3 The maximum time delay period permitted by the applic
37、able building, life safety, and fire codes is seconds with 30 seconds permitted.when approved and adopted by the jurisdiction A-4 Labeling procedures for a delayed egress locking system require a reexamination or engineering evaluation by the laboratory for previously investigated components used in
38、 other assemblies. A-5 Conformance Criteria. Certification that products offered meets the requirements of this Standard and conform to the individual manufacturers drawings, specifications, standards and quality assurance practices are available and in some circumstances are required. Buyer require
39、ments determine the need for proofs of conformance such as first article inspection, test laboratory reports, or listings. Specifiers requiring assertions of conformance utilize statements of conformance by individual manufacturers, or test reports acceptable to the buyer. A-6 Preservation, Packagin
40、g and Packing. Unless other arrangements between buyer and seller are made, preservation, packaging and packing shall be sufficient to protect containers and their contents under normal shipping and handling conditions from the source of supply to the destination point. A-7 Marking. Unless other arr
41、angements between buyer and seller are made, marking shall be in accordance with the individual manufacturers standard practice. 10 A-8 Conformance to Other Standards. This Standard contains a requirement for products to be listed or labeled by nationally recognized independent testing laboratories. Such laboratories require conformance to other standards in addition to ANSI/BHMA A156.24.
