A156.1 — Butts and Hinges
Covers performance requirements for full mortise, half mortise, full surface, and half surface hinges. Defines grades (1, 2, 3) based on cycle testing, weight capacity, and material thickness.
A156.2 — Bored and Preassembled Locks
Covers cylindrical (bored) locks and lever sets. Defines grades based on cycle testing (Grade 1: 800,000 cycles), strength tests (torque, impact), and security tests (forced entry resistance).
A156.3 — Exit Devices
Covers panic hardware and fire exit hardware. Defines cycle testing, force requirements (15 lb max to release), and endurance standards. Exit devices on fire-rated doors must also carry UL or WHI fire listing.
A156.4 — Door Controls (Closers)
Covers surface-mounted, concealed, and floor closers. Defines closing force ranges, backcheck, and cycle testing by grade. Grade 1 closers are tested to 2,000,000 cycles.
A156.5 — Auxiliary Locks
Covers deadbolts, auxiliary deadlatches, and interconnected locks. Defines grades based on bolt throw, cycle testing, and forced entry resistance.
A156.13 — Mortise Locks
Covers mortise lock bodies, cylinders, and trim. Grades are based on cycle testing, strength, and function testing for each lock function (classroom, storeroom, entrance, etc.).
A156.15 — Closer Holders
Covers overhead stops and holders. Defines hold-open force, stop impact absorption, and cycle testing.