The Detroit times., 1911-02-21

than eight (s) Inches Icenters. one
CD end OF each bar projecting into
the wall OF Chimney and the other
Joists. with a niiing above the bars
OF not less than two CD courses or
brick laid In cement mortar. Wood
centering under arches shall be re-
moved before piastering ceiling un-
Sec 10. FIREPLAcEs. The
backs and the sides or all, fireplaces
shall not be less than eight (s)
inches thick and o. brick, stone.
concrete or other incombustible ma
terials and shall have an iron. terra
Gotta or hrebrick lining where used
for CRATES or open fires.
Sec. 1r FRAMING. Wood franz
ing around chimneys and hearths,
shall not be built into any hearth.
nor within two CD inches OF the out
or lining or any nue.
ARrICLE XVIII.
Hot Air steam and Hot water
Section i. HOT AIR PIPES. All
hot air pipes or flues shall be
made or tin or other sheet metal.
and when built In masonry shall
be enclosed on all sides by walls
not less than four 90 inches thick.
Hot air pipes In wood or stud par-
titions shall have double walls with
not less than one-Quarter (Al Inch
air space between. and shall have
air tight Joints.
Horizontal hot air pipes shall he
at least six CO. inches below any
lath or plaster or wood ceiling, un-
less such ceiling Is protected by
a metal shield or asbestos mill
pipe.
Sec. 2. REGISTER BOXES Reg
lister boxes placed in wood or other
combustible floor or wall construc-
tion shall be made OF metal, doubled
and perfectly isolated from contact
with such construction.
Sec. 8. COLD AIR BOXES. Cold
air boxes or ducts connecting to
hot air furnaces shall be made or
metal, brick or other incombustible
material. but shall not be carried
under the basement floor.
Sec. Z. VENTILATION FLUES.
Ventilation nues or ducts for the
removal OF foul or vitiated air.
shall be constructed OF sheet iron
or other incombustible material.
and isolated from wood or other
combustible material Such duets
In school rooms shall be covered
on all exposed sides with metal
lath or other incombustible ma
tertal and two coats OF plaster.
Sec. s. STEAM OR HOT WATER
ing pipes shall not be placed In
contact with any timber or wood
work. and shall be protected by .
metal shield or other incombustibls
material. When they pass through
ioors or esilinss Of isth or p las-
they shall pass through metal
tubes. one-half inch larger In d.
ameter than the pipes.
Sec. 8. STEAM COILS. Boxes
enclosing steam or hot water coils
or indirect surface shall be made
of metal or other incombustible ma
terial. They may be covered on
the outside with wood lined with
Sec. Z. COVERING OF PIPES.
All hot water and low pressure
inner layer OF incombustible ma
terial at least ons-eighth (h)
inch In thickness. with O total
thickness not less than one-hnlf
(h) inch. High pressure steam
bustible material not less than one
Cd inch in thickness. All pipe
coverings must be protected from
contact with smoke pipes or other
heated surfaces.
ARTICLE XIX.
Heating Appliances.
Section ]. FLUE CONNECTIONS.
All boilsrs. furnaces. fireplaces.
ovens, Kitchen ranges and gas
BIONe8,t AnQ 0LuoI nS4LAuk aQNaE-
atua shall be connected with a
nue. chimney or stack. an directly
and within the shortest distance
Sec. .. HEATING BOILERS. All
boilers. In rssidsncea used for heat,
in no case shall this pressure exceed
twelve (l2) pounds per square inch.
Heating systems connected with
high pressure boilers. must have
In such \ manner as will prevent
a higher pressure than twelve (l2)
pounds. on any part OF the heating
Sec. .. FURNACE CONSTITUTE
TON Brick; sot furnaces must Dc
up with hard brick and mortar and
with an air space between these.
The tops Of such furnaces shall
be protected either with brick
arches properly anchored with tie
rods and buckstays with the top
and launches Of arch filled with
sand or by metal shields securely
fastened and nlled with not less
than two inchos Of sand over
crown OF arch or highest point or
metal shield.
Portable furnaces shall be en-.
closed with double castings with at
least one-inch air space between
or with one outside casing lined
with asbestos paper and tin. The
castings shall be of galvanized iron
the furnaces shall have top pro-
tected by metal shields and sand.
Sec. A. NO DRICK-SET BOIL
Frs, FURNACES OR OVENS ON
WOOD. Brick-set boilers. fur
naces. and ovens shall not be sup
ported on beams or moor construc-
tion of wood or other combustible
Sec. 5. FLOOR PROTECTION
UNDER PORTABLE BOILERS.
FURNACES. OVENS, ETC. Port
able boilers. hot air Furnaces, cof-
fee roasters and other similar APP
pliances, when not brick-set. may
be supported on beams or moor
construction made OF wood or other
combustibIe material. but In any
such case the floor shall be pro-
tected by q covering not less
than four (4) inches thick OF con-
crete, or brick laid In cement NOR
tar. Such covering shall be laid
on a continuous sheet metal plate.
not less than one-eighth (h) inch
thick. having all joints riveted. and
the edges turned up four inches
on all sides.
The floor covering and plate
shall extend under the entire APP
and two CD feet on each or the
Sec. 8. CLEAEANCE AND PRO-
lection. The distance from the
top OF any boiler. furnace. oven.
coffee roaster or other appliance
In which similar nres are main
tanned, to a ceiling OF wood or
other uncomfortable material shall
be not less than two CD feet.
For furnaces or boilers In resi-
uences this distance may be re-
duced to ten (10) inches provided
oatlInu ovar thu furnace
boiler and twenty (2ol inches all
around II covered with asbestos
mill board and sheet metal, kept
at least one I'D inch below the