The Detroit times., 1911-02-20
81, ,han IN. width OF the Mantel.

less than the width OF the Mantei
Hearths shall be supported by
trimmer arches or brick, stone. terra
Gotta freproonng or concrete. or py
heavy metal bars. placed not less
than eight 90 inches centers. one
ID end OF each bar projecting into
the wall OF Chimney and the other
end securely fastened TO the trimmer
Joists. with a filiiug above the bars
or not less than two CD courses or
brick, laid In cement mortar. Wood
centering under arches shall be re-
moved before plastering ceiling un-
Sec. 10. FIREPLAcEs The
backs and the sides OF all hreplaces
shall not be less than eight (O
inches thick and OF brick, stone.
concrete or other incombustible ma
tarials and shall have an iron. terra
Gotta or firebrick lining where used
for CRATES or open nres.
Sec. IL. FRAMING. Wood franz
shall not be built into any hearth.
nor within two (2) inches OF the out
er lining OF any nue
ARTICLE XVIII.
Hot Air, steam and Hot Water
Section /. HOT AIR PIPES. All
hot air pipes or fiuss shall be
made OF tin or other sheet metal,
and when built In masonry shall
be enclosed on all sides by walls
not less than four (4) inches thick.
Hot air pipes In wood or stud par
titions shall have double walls with
not less than one-quaFter NJ 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
metal shield or asbestos mill
pipe.
Sec. 2. REGISTER BOXES Reg
lister boxes placed in wood or other
combusttble floor or wall construc-
ton shall be made OF metal. doubled
and perfectly isolated from contact
with such construction.
Sec. 3. COLD AIR BOXES. Cold
air boxes or ducts connecting TO
hot air furnaces shall be made or
metal, brick or other incombustiole
material. but shall not be carried
under the basement floor.
Sec. 4. VENTILATION FLUES.
Ventilation fiues' or ducts for the
removal OF foul or vitiated air.
shall be constructed OF sheet iron
or other tncombustible material
and Isolated from wood or other
combustible material. Such ducts
III rNnOOA bG
on all exposed sides with metal
lath or other incombustible ma
terial and two coats OF plaster.
Sec. s. STEAM OR HOT WATER
PIPES. Steam or hot water heat
ing pipes shall not be placed In
contact with any timber or wood
work. and shall be protected by q
metal shield or other incombustible
material. When they pass through
floors or ceilings Of lath or plas-
ter. In addition to the metal shield,
they shall pass through metal
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
steam pipe covering shall have an
inner layer OF incombustible ma
terial at least one-eighth< @)
inch In thickness. with total
thickness not less, than one-half
pipe covering must be OF incom-
bustible material not less than one
"a 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 boilers, furnaces. fireplaces.
ovens. kitchen ranges and gas
stoves, and other heating appar-
atus, shall be connected with a
fius. chimney or stacit. az directly
and within the SHORTEST distance
Sec. q HEATING BOILERS. All
boilers. In residences used for heat.
Ing only shall hall bs low prs.sus r. and
twelve (12J pounds per square inch.
Heating systems connected with
high pressure boilers, must have
positive reducing valves attached
In such q manner as will prevent
higher pressure than twelve tlal
pounds. on any part OF the heating
Sec. 8. FURNACE coNsTRUC-
TON BrIck-sot furnaces must be
enclosed with double walls. laid
up with hard brick and mortar and
with an air space between these.
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 flled 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
OF not less than No. % gauge and
the furnaces shall have top pro-
tected by metal shields and sand
Sec. 4. NO DRICK-SET BOIL.
ERS, FURNACES OR OVENS ON
WOOD. Brick-set boilers. fur
naces, and ovens shall not be sup
ported on beams or floor construc-
ton of wood or other combustible
Sec s. FLOOR PROTECTION
UNDER PORTABLE BOILERS.
FURNACES, OVENS, ETC. Port
able boilers. hot air furnaces, cof-
fee roasters and other similar APP
piiances, 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 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 (k) 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
pliance and four "a feet In front
and two (2) feet on each OF the
Sec. 6. cLEAE.ANcE AND PRO-
LECTION The distance from the
ton of any boiler. furnace. oven.
coffee roaster or other appliance
in which similar fires are main
tanned, to ceiling OF wood or
other .ncombustible material shall
be not less than two CD feet.
For furnaces or boilers In resi-
dences this distance may be re-
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