The Detroit times., 1911-02-21

isss than the width OF the Mkntsl
Hearfhs shall be supported BY
trimmer arches OF brick. stone. terra
Gotta nreproonnx or concrete. or py
than eight CO. inches centers. one
Cd end OF each bar projecting into
the wall OF Chimney and the other
end securely fastened to the trimmer
Joists. with a fliing above the bars
brick. laid IN cement mortar Wood
centering under arches shall be re-
moved before piastering ceiling un-
Sec. 10. FIREPLAcEs. The
shall not be less than eight go
inches thick and or brick, stone.
concrete or other incombustibis ma
terials and shall have an iron. terra
Gotta or frebrick lining where used
for crates or open ,> nres
ing around chimneys and hearths.
shall not be built into any hearth.
nor within two (2) inches OF the out
or lining OF any fiue.
ARTTCLE XVIII.
Hot AIR, steam and Hot Water
Section I. HOT AIR PIPES. All
hot air pipes or fues 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 ca inches thick.
Hot air pipes In wood or stud par
titions shall have double walls with
not less than one-quarter (h) inch
air space between. and shall have
air tight Joints.
Horizontal hot air pipes shall he
at least six (el inches below any
lath or plaster Or wood ceiling. UNI
less such ceiling IL protected by
metal shield or asbestos mill
board separate from the hot air
Sec. Q. REGISTER BOXES. Reg
lister boxes placed In wood or other
combustible floor or wall construc-
ton shall be made OF metal. doubled
and perfectly isolated from contact
with such construction.
Sec. s. COLD AIR BOXES. Cold
air boxes or ducts connecting TO
hot air furnaces shall be made or
material. but shall not be carried
under the basement floor.
Sec. 4. VENTILATION FLUES.
Ventilation nues or ducts for the
removal OF foul or vitiated air.
shall be constructed OF sheet iron
and isolated from wood or other
combustible material Such ducts
In school rooms shall be covered
on all exposed sides with metal
lath or other incombustible ma
tss s.1 and two sSa tn Of plss Wxrrp
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 incombustibls
material. When they pass through
ter. In addition to the metal shield,
they shall pass through metal
tubes. one-half inch larger In d.
amster than the pipes.
Sec. .. STEAM COILS. Boxes
enclosing steam or hot water coils
OF metal or other incombustibie ma
terial. They may be covered on
the outside with wood lined with
Sec Z. COVERING OF PIPES
Steam not 1D wa ssr. sns !Ss s~. ss
inner layer OF incombustible ma
terial at least ons-eighth (h)
inch In thickness. with q total
thickness not less than one-hnlf
(h) inch. High pressure steam
pipe covering must be Of incom-
bustibie 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. nreplaces.
ovens. kitchen ranges and gas
stoves. and other heating appar-
fue. chimney or stack. 40 directly
and within the shortest distance
Sec. !. HEATING BOILERS All
boilers, In residences used for heat
ing ony snail % shs sse as
twelve CAD pounds per square inch.
Heating systems connected with
high pressure boilers, must have
positive reducing valves attached
In such . manner az wiz prevent
pounds. on any part OF the heating
Sec 3. FURNACE coNsrRUc-
TON Brick-sot 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 launches Of arch filled with
fastened and nilsd with not less
than two inches Of sand over
crown Of arch or highest point Of
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. 26 gauge and
the furnaces shall have top pro-
tsetsd By metal net n ssiela. s ana fand
ERS, FURNACES OR OVENS ON
WOOD Brick-set boilers. fur
naces, and ovens shall not be sup
ported on beams or floor construc-
tion OF wood or other combustiois
Sec 5. FLOOR PROTECTION
UNDER PORTABLE BOILERS.
FURNACES OVENS, ETC. Port
able boilers. hot air furnaces. cof-
fee roasters and other similar APP
be 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 covering not less
than four CD 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
pliance and four 90 feet In front
and two CD feet on each OF 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 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-
uences this distance may be re-