Article 2 - EXISTING BUILDINGS-FIRE EXTINGUISHING EQUIPMENT

Section 27-930

Section 27-930

  §  27-930  Existing standpipes. Standpipe systems existing on December
sixth, nineteen hundred sixty-eight shall not be required to be  altered
to conform to the provisions of this subchapter, except as follows:
  (a)  The  existing  installation  shall  meet  the  following  minimum
requirements:
  (1) WATER SUPPLIES. There shall be a reserve of at  least  twenty-five
hundred gallons of water in a gravity or pressure tank for exclusive use
of  the  standpipe; or there shall be a direct connection to a city main
meeting the requirements of section 27-945  of  article  three  of  this
subchapter.
  (2) GRAVITY TANKS. The gravity tank or tanks shall be filled by direct
city water connection or by an automatic fill pump at a rate of at least
forty-five  gpm;  and  the  bottom of the tank shall be located at least
eleven feet six inches above the highest  hose  outlet  under  the  main
roof.
  (3)  HOSE  AND  HOSE  VALVES.  Hose  and  hose valves shall be in good
serviceable condition. Hose valve wheel handles shall be within six feet
six inches of the floors or stair landings or the wheel  handle  may  be
within  two  feet  horizontally  from a stair tread and no more than six
feet six inches vertically above the tread. Such  hose  may  be  omitted
from  hose  racks  in existing buildings in occupancy group J-2 provided
that the provisions of paragraph five  of  subdivision  (c)  of  section
27-942 of article three of this subchapter are complied with.
  (4)  FIRE DEPARTMENT CONNECTIONS. There shall be a three inch by three
inch siamese hose connection with approved caps, painted red.  The  word
"Standpipe"  shall  be  cast in the body of the siamese connection or on
metal plates that are secured to  the  riser  or  to  the  face  of  the
building behind the siamese connection.
  (5)  NOZZLES.  A  five-eighths  inch  smooth  bore nozzle with two and
one-half inch hose shall be provided where the hydrostatic  pressure  at
the hose valve is less than ten psig.
  (6)  PROTECTION  FROM FREEZING. All parts of the standpipe system that
are exposed to freezing  shall  be  protected  in  accordance  with  the
requirements  of  subdivision  (a) of section 27-949 of article three of
this subchapter.
  (7) PRESSURE  REDUCING  VALVES.  Pressure  reducing  valves  shall  be
provided  as  required  by  section  27-944  of  article  three  of this
subchapter.
  (8) DRIP VALVES. Drip valves shall be  provided  between  the  siamese
connection and the check valve.
  (b) When the building requires additional standpipe protection because
of  extension in height or in area, or the occupancy is changed to a use
requiring additional protection, the new or altered part of  the  system
shall comply with this subchapter.

Section 27-931

Section 27-931

  §  27-931  Existing  sprinklers.  (a)  Required  sprinklers. Sprinkler
systems  and  devices  existing  on  December  sixth,  nineteen  hundred
sixty-eight  shall  not  be  required  to  be  altered to conform to the
provisions of this subchapter, except that when additional protection is
required for a change in occupancy or for a building addition,  the  new
or  altered  part  of  the  system  shall  comply  with this subchapter.
Sprinklers in any extension or alteration  shall  be  connected  to,  or
extended  from,  the  existing  system  or  a  separate  water supply as
provided  in  section  27-962  of  article  four  of  this   subchapter.
Additional heads shall not be connected to existing undersized piping.
  (b)  Voluntary  sprinklers.  Sprinkler systems and devices existing on
December sixth, nineteen hundred sixty-eight, but which are not required
by this code, need not conform to the  provisions  of  this  subchapter,
except  that  when a siamese hose connection is installed in the system,
the siamese connection shall be installed and the entire system pressure
tested as required by this subchapter.