CAN/CGSB-69.20-M90

This National Standard of Canada is equivalent to American National Standard ANSI/BHMA A156.4-1986. 1.1 This standard contains requirements for door closers surface mounted, concealed in the door, overhead concealed and concealed in the floor. Also included are pivots and thresholds for floor closers. Criteria for conformance include cycle, operational, closing force and finish tests. Optional tests which must be specified separately are also included. 1.2 Tests in this Standard are performed under laboratory conditions. In actual usage results may vary because of installation, maintenance, and environmental conditions.