Article 3 - OCCUPANCY GROUP A-HIGH HAZARD

Section 27-243

Section 27-243

  §  27-243  Classification. Buildings and spaces shall be classified in
the high  hazard  occupancy  group  when  they  are  used  for  storing,
manufacturing,   or   processing   potentially-explosive   products   or
materials,  or  highly-combustible  or  highly-flammable   products   or
materials that are likely to burn with extreme rapidity. The high hazard
group  shall  also  include:  uses  that involve storing, processing, or
handling any materials that produce explosive dust, or  that  result  in
the  division  of  matter  into  fine  particles  subject to spontaneous
ignition; uses that employ solids or substances that ignite  or  produce
flammable  gases  on  contact  with  water;  and  any  other  uses  that
constitute a high fire hazard because of the form, character, or  volume
of the materials involved.
  (a)  Typical material contents. Acetylene gas and gases under pressure
of fifteen psig or more  and  in  quantities  greater  than  twenty-five
hundred  cubic  feet, including hydrogen, illuminating gas, natural gas,
and all other gases subject to explosion; gas piping at pressure  levels
above  fifteen  psig  regardless of the quantities of gas; celluloid and
celluloid products; cotton batting; kerosene; fuel or other oils  having
a  flash  point  under 200°F (tag closed cup), except five hundred fifty
gallons or less in one- and two-family dwellings; refrigerating  systems
using high hazard refrigerants as defined in subchapter thirteen of this
chapter, and except that in buildings lawfully occupied as garages prior
to  December  sixth,  nineteen  hundred  sixty-eight the storage of tank
trucks or other vehicles, approved by  the  fire  commissioner  for  the
transportation  of products having a flash point of over 100°F (tag open
cup), and where the product contained in the cargo space of the vehicles
is pending delivery, shall only  be  considered  to  constitute  a  high
hazard  occupancy  when the product is stored in quantities greater than
forty-five thousand gallons.
  (b)  Typical  occupant  activities.  Artifical  flower  and  synthetic
leather  manufacture; ammunition, explosives, and fireworks manufacture,
sales or storage; dry cleaning or dyeing; using or storing  gasoline  or
other  combustible  solvents  as  outlined  in article six of subchapter
seven of this chapter; feather  renovating;  fruit  ripening  processes;
hydrogenation  processes; match manufacture or storage; metal enamelling
or japanning; paint and varnish manufacture; paint spraying or  dipping,
as  specified  in  article  three  of  subchapter seven of this chapter;
derivation of petroleum products by application of heat;  processing  of
paper  or  cardboard  in  loose form; pyroxylin products manufacture and
storage; rag sorting and storage; shoe polish manufacture;  straw  goods
manufacture  or  broom  corn  storage;  tar, pitch, or resin processing;
waste  paper  sorting,  shredding,  storage,  or  baling;  cotton  waste
processes.

Section 27-244

Section 27-244

  § 27-244 Location restrictions. No space classified in the high hazard
occupancy  group shall be located above the second story of any building
or building section classified in construction  group  II  containing  a
space classified in occupancy group J-1 or J-2.