The Detroit times., 1910-12-07

, terial.
Floor beams shall be covered on
top with AZ least one and three
quarters pa.) inches OF solid wood
sub-fioor, having on IL one layer OF
one and one-half ui.) pounds per
, yard asbestos paper and seven
cights C5s) inch finished wood floor
IL the sub floor be less than Three
and 'ono-half t3ie) inches thick. II
shall he splined or tongued And
grooved
ON floor joists. one % thickness
OF seven-eights 80 inch iooring
be used In place OF the one and
three-quarters tAl inches OF
solid asbestos paper.
Floors ceilings and roofs. con
structed or wooden beams and )oists.
shall he covered on the underside
with at least one Cd inch OF fire
proof material and at least one In
coat of plaster.
Metal iath and plaster shall not
he deemed sufficient for the one
, I'D Inch OF fireproofing.
Where beams are used as in mill
construction, and the underside OF
the flooring on the beams serves as
the ceiling. this enc III inch OF Are
PROBING and plaster must be applied
10 the sides and bottom OF the beams
and 10 the underside OF the floor.
On the top or ceilings. one Cd inch
OF mortar or similar and approved
fire protection. provided all exposed
upper parts OF such ceilings. with
beams. etc, are So protected.
No wood shall bee used for any
carrying partition or post.
Non-carrying partitions may have
WOOD studs. but all wood studs must
be covered with metal lath and ce-
ment plaster. also the soiiI or stairs;
Wood Turing for walls or wood
lath Will not be allowed
Aa.. Mill. CON
STRUCTION. This type OF con
struction shall be applied 10 all
buildings in which enclosing walls
and the roof coverings are 10 be
made OF incombustible material and
all interior walls Of brick or con-
crete and having columns and grid
ers. Floors. ceilings and roofs shall
be constructed with either metal or
wood girders and beams.
Beams and Orders shall be Gov
cred on top with at least one and
three-quarters GSp inches OF solid
wood sub-fioor. having on IL at least
one % layer OF one and one-haf
li2) pounds per yard asbestos paper
cor two 90 inches OF mortarl and
; seven-eights "a inch finished wood
, floor. n the sub-ioor be less
than three and one-half (3is) inches
thick. IL shall be splined. or tongued
and grooved
The columns. II OF wood. shall
have "A sectional area OF not less
than sixty 900 square inches.
The Orders and beams II OF wood.
shall have a sectional area OF not
less than fifty-six $50 square inches.
Columns. Orders and beams. II Of
metal. shall be covered as In Pro
tected Construction"
Stair and Elevator enclosures shall
be made entirely OF incombustible
material. at least four ca inches
thick
II such buildings are four ID or
more stories In height. the stair and
elevator enclosures shall have self
closing. standard fire doors. and the
windows In interior walls shall have
metal frames and wire glass.
Wood Turing for walls shall not
be allowed.
Wood posts shall have metal caps
forming base for the post above
cured TO the cap In such a manner
as to be self-releasing.
Wood beams and girders having
cross section less than eighty
tSO) square inches. shall be in solid
pieces and where two CD or more
pieces are used 10 form a beam. they
shall be bolted together at intervals
OF not over thirty-six $3.50 inches and
with bolts not less than one-half
usl Inch In diameter.
The ends Of all wood beams and
Orders resting in walls shall be cut
on bevel so that the top edge OF
beams and Orders shall not extend
ins Sec the IS wall TYPE i. ORDINARY
, CoNsTRUcrioN. This type OF con.
struction shall be applied TO all
{ buildings In which the enclosing
walls are TO be OF incombustlble ma
terial. but iE which the interior
timber and iron structural parts are
not protected with Are resisting COW
. ering.
Sec. 10 TYPE 5. FRAME con-
struction. This type OF construc-
; ton. shall be applied to all buildings
in which enclosing and interior walls.
floors. etc. are TO be constructed
entirely OF wood
Wood frames covered with brick.
stone or cement veneer. shall be
. CONSTRUCTION. BY this term
shall be meant all buildings In
which all Internal loads and
external loads and strains are
transmitted to the founda-
framework Sns Ky of lron nAs'e or steel ei
or reinforced concrete. Such build
ing may be hreproof or pro-
mill construction floors and all
skeleton construction buildings must
be governed by the requirements as
set forth for these types.
building. the steel Orders and beams
must be riveted or bolted together
at their respective junction points.
and riveted or bolted to the columns
, Each successive column must be
rfveted or bolted to the one below IL.
Where columns are OF cast iron
they must have brackets or vertical
Tugs cast on columns and the ends
or the girders and beams must be
bolted to these brackets or lugs or
mr. If.f
be otherwise connected by wrought
iron or steel straps. passed across
. or through the columns In such u
manner as to rigidly connect the
beams and girders In the direction
OF their length. These straps must
be riveted or bolted TO the sirders
and beams.
In all skeleton construction
building. the parts OF such steel
construction, contained In walls
must have these walls anchored TO
the skeleton.
Sec. 2l. EXPLANATION OF
TERMS The terms "Flreproof Con-
struction," Protected Construction. :"
MIL Construction" Ordinary Con-
struction" or Frame CONSTRUCTION"
when used. mean that the whole or
any part OF a building or structure
referred TO. shall be constructed In
accordance with the conditions pre-
scrlbed for the respective classes OF
buildings as set forth In this Ordi-
nance.
Sec. 22. DIFFERENT TYPES IN
ONE BUILDING. When any build
ings shall be erected with different
parts OF different types Of construc-
ton. IL shall be considered as a
building OF the lowest type. unless
such different parts are separated
by regular fire wallis and floors. and
all openings I'm these fire walls and
floors are fully protected by standard
fire doors and windows.
In this case the different parts
shall be considered as different
buildings. each OF Its own type.
Sec. 20. CLASSES OF BUILD
1NGS. For the purposes OF this
Ordinance. buildings shall be
divided into Glasses" In accord
ance with their uses, as follows