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American National Standard for Multipoint Locks
This Standard establishes performance requirements for Multipoint Locks and includes operational tests, strength tests, cycle tests, strength tests, and security tests. For further information, consult the full standard, ANSI/BHMA A156.37 STANDARD FOR MULTIPOINT LOCKS.
BHMA has created this series of Hardware Highlights to provide useful, accessible information about builders hardware for anyone with an interest in devices that hang, control, secure, and trim the doors. BHMA is the trade association which represents almost all of the North American manufacturers of builders hardware. One of its main activities since 1983 has been the development and maintenance of ANSI-approved standards for many separate product categories.
Product Performance: Purchasers of hardware certified to A156.37 (https://buildershardware.com/CertificationProgram/Certified-Products-Directory) can be assured products will perform to their expectations.
Below are an explanation and some examples of the evaluations conducted for certification:
The required force or torque to open and close the door considers both primary and secondary latching. Requirements vary by trim type. For example, Grade 1 lever-operated locks with no load on the latching must open with a maximum torque of 28 in-lbf.
Building products are expected to last, and builders hardware is no exception. Grade 1 multipoint locks must pass a rigorous test of one million cycles of opening and closing, with a 10-pound axial load simulating a door closer. This total includes cycles on both the primary and secondary latches.
Multipoint locks must provide reliable operation for authorized users while ensuring strong protection from unauthorized access. Several rigorous tests verify performance, including a 1350-pound Grade 1 bolt strength test with all latching points engaged.
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Builders hardware provides several attributes that are essential to building safety and performance, including egress and fire protection.
There are various types of trim which meet the ADA and A117.1 requirements for operable parts to be “operable with one hand and shall not require tight grasping, pinching or twisting of the wrist.”
Resistance to corrosion is evaluated through a salt spray test to ASTM B117 providing confidence to be aesthetically attractive and stay that way.
The reliable closing and sealing of openings can also contribute to energy conservation. BHMA has developed Product Category Rules, which will further define sustainability requirements.
PRODUCT DESCRIPTION AND CATEGORIZATION: Multipoint locks are only categorized by Grade levels: 1, 2, and 3, with Grade 1 representing the highest performance level. Locks that require a drill-resistant cylinder are identified with the Suffix “D”. Consult the manufacturer for guidance on product selection, operation by inside and outside trim, availability of electrical options, finishes, and specific features.
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