600 (Doors Not Exceeding 900mm Wide) 601 (Doors Not Exceeding 1200mm Wide)
Suitable for single door sizes not exceeding 900mm wide and 2440mm in height. For single doors not exceeding 1200mm wide specify IDC 601.
For busy entrance and exit doors where access, if required via an Outside Access Device, is projected as frequent. Where floor and frame detail prevent two point locking or where it is not acceptable for vertical rods to be visible.
Where the specification calls for the additional security of an anti thrust latch bolt.
Where the dogging device facility, activated by allen key, retaining the latch bolt in the withdrawn position allowing free access until reset, is viewed as advantageous.