(a) The following provisions apply to multiple dwellings.
1. Every building entrance door or other exterior door permitting access to two or more units of
dwelling space shall be equipped with heavy duty dead latching locksets (series 161, FF-H-106c,
minimum, with a minimum 7/8 inch by 5/8 inch with 1/2 inch minimum throw latch bolt with automatic
dead-locking plunger, or ANSI/BHMA A156.2 Grade 1). Outside cylinders of main entrance door locks
shall be operated by the tenant's key, which shall not be keyed to also open the tenant's dwelling unit
entrance door.
2. All exit and exitway doors shall be freely openable from the inside at all times.
3. All exterior entrance doors to common basement, cellar or storage areas shall be self-closing and
lockable.
4. All entrance doors to dwelling units shall be equipped with a medium duty dead latching lockset
(series 160, FF-H-106c, minimum, with a minimum 11/16 inch by 1/2 inch with 1/2 inch minimum throw
latch bolt with automatic dead-locking plunger, or ANSI/BHMA A156.2 Grade 2) or with a dead bolt lock
separate from the latch set.
5. All entrance doors to each dwelling unit shall be equipped with a chain door guard so as to permit
partial opening of the door, and a viewing device installed on the designated main entrance door to the
dwelling unit, located so to enable a person on the inside of the entrance door to view a person
immediately outside.
6. All openable windows, sliding doors, basement windows and windows opening onto exterior
stairways, fire escapes, porches, terraces, balconies or other areas affording easy access to the
premises shall be equipped with a locking device of some kind.
7. Grilles lockable from the inside only may be placed on the inside or outside of windows only if the
windows do not serve to