BHMA A156-9:2003 pdf download.AMERICAN NATIONAL STANDARD FOR CABINET HARDWARE
4.4 Test 3 Self Closing Hinge Closing Force Test and Over-Opening Test
4.4.1 In addition to the Hinge Permanent Set Test 1 and the Hinge Operating Life Test 2, self closing hinges shall meet the Closing Force Test 3. Frame and frameless concealed hinges shall also meet the Over-Opening Test described in 4.4.4.
4.4.2 At the start of the Hinge Operating Life Test 2, two self closing hinges when mounted on the test door shall produce a minimum closing force (not the force to open) when the door is in the closed position of 4 ounces(1.1 N) 14 inches (356 mm) from the test fixture as specified in Figure 1.
4.4.3 After the Operating Life Test 2, the hinges shall hold the door in the closed position and the hinges shall cause the door to automatically close from not less than 10 degrees open position while the door is being moved slowly toward the closed position.
4.4.4 Using a test fixture as described in 4.1 and shown in Figure 3, open the door to the fully open position. Apply a force in the opening direction at a point 12 in. (305mm) out from the inside edge and halfway down the length of the door. Apply the force increasingly at a constant rate up to the required value and then release. The hinges shall then be fully functional and hold the door in a closed position.The hinges shall cause the door to automatically close from a minimum of a 10 degree open position while the door is being moved slowly toward the closed position.
4.6.2 Operational Tests
4.6.2.1 Force to latch test The force required to close the door to engage the latch shall be measured at a point on the door 1 in. (25.4 mm) from the latch edge of the door and on the centerline of the latch. This force shall not exceed a 4.5 lbf (20 N) maximum.
4.6.2.2 Force to unlatch test The force required to operate the latch to release the strike shall not exceed an 8 lbf (35.6 N) maximum or 12 lbf-in. (1.4 Nm) maximum. This force shall be measured at the release actuator or in the case of touch latches at a point 1 in. (25.4 mm) from the edge of the door and on the centerline of the latch.
4.6.2.3 Holding Force Test The latch shall hold the door in the closed position when a 10 lbf (44.5 N) is applied against the door. This force shall be applied 1 in. (25.4 mm) from the free swinging edge of the door and on the centerline of the latch.
4.6.2.4 Child resistant latches, when mounted according to the manufacturers' instructions,shall require two or more separate actions before the door is opened more than 1 1/4 in. (31.8 mm); or simultaneous actuation of two or more latch elements separated by a distance of at least 3 in. (76.2 mm) before the door is opened more than 1/4 in. (31.8 mm).
4.6.2.5 Child resistant latches, when mounted according to the manufacturers' instructions,shall require more than 15 lbf (66.7 N) pull or 25 lbf(111.2 N) push at the free edge of the door to open the door over 1 1/4 in. (31 .8 mm) from its latched position.BHMA A156-9 pdf download.