The Detroit times., 1911-02-20

heavy metal bars. placed not less
than eight 80 inches centers. one
% end OF each bar projecting Into
end securely fastened to the trimmer
Joists. with n filling above the bars
OF not less than two 90 courses OF
brick, laid In cement mortar Wood
centering under arches shall be re-
moved before plastsring- ceiling un-
Sec. 10. FIREPLAcEs. The
backs and the sides OF all frepiaces
shall not be less than eight (O
inches thick and OF brick, stone.
concrete or other incombustible ma
tsrisls and shall have an iron. terra
Gotta or nrebrick lining where used
for CRATES or open fres
Sec IL. FRAMING. Wood franz
ing around chimneys and hearths.
shall not be built into any hearth.
nor within two ca inches or the out
er lining OF any fiue.
ARTICLE XVIII.
Hot Air, steam and Not Water
Section /. HOT AIR PIPES. All
hot air pipes or fiues shall be
made OF tin or other sheet metal.
be enclosed on all sides by walls
not less than four ca inches thick.
Hot air pipes In wood or stud par
titions shall have double walls with
not less than one-quarter (L) 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 IL protected by
a metal shield or asbestos mill
board separate from the hot air
pipe.
Sec. 2. REGISTER BOXES. Reg
lister boxes placed in wood or other
combustible moor or wall construc-
ton shall be made Of metal doubled
and perfectly isolated from contact
with such construction.
Sec. .. 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 moor.
Sec. 4. VENTILATION FLUES.
Ventilation fiues 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
combusttble material Such ducts
In school rooms shall be covered
on all exposed sides with metal
lath or other incombustible ma
tertal and two coats OF plaster.
Sec. 8. 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 a
metal shield or other incombustible
floors or ceilings OF iath or pias-
ter. in addition to the metal shield,
they shall pass through metal
Tubes. one-half inch larger In d.
smeter than the pipes.
Sec 6. STEAM COILS. Boxes
AAe Antl
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 I. COVERING OF PIPES.
steam pipe covering shall have an
inner layer OF incombustible ma
terial at least one-eighth (h)
inch in thickness. with total
thickness not less than one-half
(h) inch. High pressure steam
bustible material not less than one
ID 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
hue. chimney or stack. as directly
and within the shortest distance
Sec. 2. HEATING BOILERS. All
boilers, In residences used for heat
ing only shall be low pressure and
In no case shall this pressure exceed
twelve Q0 pounds per square inch.
Heating systems connected with
high pressure boilers, must have
positive reducing valves attached
In such a manner as Will prevent
a higher pressure than twelve (l2l
pounds. on any part OF the heating
Sec. 8. FURNACE coNsTRUC-
TON. Brick-sct furnaces must be
enclosed with double walls. laid
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 haunckps OF arch filled with
sand or by metal shields securely
fastened and filled with not less
than two inches 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. 70 gauge and
the furnaces shall have top pro-
tected by metal shields and sand.
Sec. I; NO pRI oB SEN BOX;
WOOD. Brick-set boilers. fur
naces. and ovens shall not be sup
ported on beams or floor construc-
ton OF wood or other combusti5ie
Sec 5. FLOOR PROTECTION
FURNACES. OVENS ETC. Port
able boilers. hot abr furnaces. cof-
fee roasters and other similar APP
planes. when not brfck-set. may
he supported on beams or floor
construction made Of wood or other
combustible material. but In any
such case the floor shall be pro-
tected by q covering not less
than four 90 !nches 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
pliance and four (4) feet in front
and two (2) feet on each or the
sides and rear.
Sec. g. CLEAEANCE AND PRO-
lection The distance from the
top OF any boiler. furnace. oven,
coffee roaster or other appliance
in which similar fires are main
tanned. to a ceiling OF wood or
other Incombustible material shall
be not less than two CD feet
For furnaces or boilers In resi-
dences this distance may be re-
duced TO ten (10) inches provided
the ceiling over the furnace or
boiler and twenty GOD inches all
around Is covered with asbestos
mill board and sheet metal, kept
al Iaast one Id inch below the