Guide to ANSI Codes
ANSI/BHMA Standard A156.2:
Locks and Latches, Series 4000 Bored Lever Handle and Knob Sets
| Product | Grade | Remarks |
|---|---|---|
Lever Lock and latch sets |
||
| T-Zone 11 Line | 1 | Meets and greatly exceeds standard |
| 10 Line | 1 | |
| 7 Line | 2 | Meets and greatly exceeds standard |
| 6500 Line | 2 | |
| GX 3 Line | 2 | |
Knob Lock and latch sets |
||
| 8 Line | 1 | |
| 6 Line | 2 | Meets and greatly exceeds standard |
| 5 line | 2 |
Testing Criteria
Listed below are only some of the tests and criteria covered in this standard. For simplification, all tests and details of tests are not elaborated on. For exact and complete details of tests, etc. refer to the complete ANSI/BHMA standard.
1. Cycle test
One cycle consists of the knob or lever handle to be turned to completely retract the latch bolt allowing the test door to be opened. The knob or lever handle is then released allowing the test door to relatch. The turning direction of the knob is alternated every 100,000 cycles.
Performance tests are conducted for compliance at various intervals during and at the end of the cycle test.
| Grade | Cycles |
|---|---|
| Grade 1 | 800,000 |
| Grade 2 | 400,000 |
| Grade 3 | 200,000 |
2. Latch bolt projection
Locksets with deadlocking (guarded) latchbolts.
All grades – 1/2 inch.
Locksets with latch bolts that are not deadlatching (unguarded).
Grade 1 and 2 – 1/2 inch.
Grade 3 – 3/8 inch.
3. Dead Latch and Strike Impact Test
The number of hits or blows by various weights that can be struck.
| Grade | Blows/Foot Pounds |
|---|---|
| Grade 1 | 2 blows of 60 foot pounds |
| 2 blows of 90 foot pounds | |
| 2 blows of 120 foot pounds | |
| Grade 2 | 2 blows of 60 foot pounds |
| 2 blows of 90 foot pounds | |
| Grade 3 | 2 blows of 60 foot pounds |
4. Abusive Locked Lever Test
Outside locked levers of Grade 1 locks shall be subjected to a torque of 1,000 pound inches. After the torque is applied, failure shall occur if access is gained.
Note: Key Cylinders
All keyed cylinders used in these locks shall be of the pin tumbler type and shall have five or more pin tumbler cavities. The keyways shall have longitudinal ribs. Modification of these requirements to provide greater security are permitted.
Refer to ANSI/BHMA Standard A156.5 for other key cylinder requirements.