The Detroit times., 1910-12-07

roofs ana ceiiings may De naue vi
wood protected with hreproof ma
: Floor beams shall be covered on
top with at least one and three
quarters $50 inches OF solid Wood
snb-hoor. havins on IL one layer ~
one and onc-half ti3l pounds per
ward asbestos paper and a seven
eights tsl inch finished wood foor.
10 the sub floor he less than three
and one-half t3isl inches thick. II
shall he Splined or tongued and
On floor Joists. one 81 thickness
OF seNen-eights Ga inch noorlng
with two CD inches OF mortar may
he used I'm place Of the one and
thr,es-auarters us.p inches OF
Floors ceilings and roofs, con-
structed OF wooden beams and jotsts.
shall be covered on the underside
With at least one tD inch OF ire
proof material and at least one CIV
coat OF plaster.
Metal hath and plaster shall not
he deemed sufficient for the one
q inch of fireproohng.
Where beams are used. as I'm mill
construction. and the underside Of
the nooring on the beams serves as
the ceiling. this one Cd inch of ire
proonng and plaster must be applied
70 the sides and bottom of the beams
and to the underside OF the floor.
vi oto TOP tf CtiilnSr, one w iitl
or mortar or similar and approved
material will he deemed SUFFICIENT
nre protection. provided all exposed
upper parts OF such ceilings. with
beams. etc, are so protected
No wood shall be used for any
carrying partition or post
Non-carrying partitions may have
wood studs. but all wood studs must
be covered with metal Hath and ce-
ment plaster. also the soffit OF stairs;
Wood Turing for walls or wood
lath will not be allowed.
Sec. II, TYPE .. MILL con
struetion shall be applied 10 ali
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 ls.) inches or solid
wood sub-fioor. having on II at least
one % layer OF one and one-haf
Qi.) pounds per yard asbestos paper
tor two CD inches OF mortar) and
seven-eights 90 inch finished wood
floor. X the su6-fioor be less
than three and one-half t3l2) 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 600 square inches.
The girders and beams II OF wood.
shall have sectional area or not
less than ttfty-six (56) square inches.
Columns, girders 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.
IL such buildings are four ca or
more stories In height, the stair and
elevator enclosures shall have self
closing. standard fire doors. and the
windows I'm 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
and the ends of Orders shall be Sc
cured 10 the cap In such a manner
as 10 be self-releasing.
Wood beams and girders having
cross section less than eighty
500 square inches. shall be in solid
pieces and where two (2) or more
pieces are used to form a beam. they
shall be bolted together at intervals
OF not over thirty-six 1861 inches and
with bolts not less than one-half
~. inch In diameter.
he cIluS VI ali WOOu DttllS anu
girders resting in walls shall be cut
on bevel Sc that the top edge OF
beams and girders shall not extend
into the wall
c6 Sec Is TYPE TYPE 4 ORDINARY
struction shall be applied TO all
buildings In which the enclosing
walls are to be OF incombustible ma
terial. but iE which the interior
timber and iron structural parts are
ed wwrtt -
ering.
Sec. 10. TYPE 8. 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
Wood frames covered with brick.
stone or cement veneer. shall be
classed in this type.
co sss; e; T9SE ~ SKELETON ,sI! TON;
which all internal loads and
strains. or both internal and
external loads and strains are
transmitted to the founda-
f lShs Sy OF iron nke'e oP s,e or
or reinforced concrete. Such build
ing may be freproof or pro-
tected construction. or may have
mill construction floors and all
be governed by the requirements as
set forth for these types.
In any skeleton construction
building. the steel Orders and beams
must be riveted or bolted together
at their respective junction points
and rfveted OF bolted to the columns.
Each successive column must he
riveted or bolted TO the one below IT,
Where columns are of cast iron.
they must have brackets or vertical
Ian AT nF.1
Of the Orders and beams must be
bolted TO these brackets or lugs or
to both brackets and Tugs or must
be otherwise connected by wrought
iron or steel straps. passed across
or through the columns In such
manner as to rigidly connect the
beams and Orders In the direction
OF their length. These straps must
be riveted or bolted to the girders
and beams.
In all skeleton construction
building. the parts OF such steel
construction. contained I'm walls
must have these walls anchored to
the skeleton.
TERMS. The terms "Fireproof Con-
struction," Protected Construction. e"
Mill Construction" Ordinary Con-
struction" or Frame Construction. E"
when used. mean that the whole OF
any part OF building or structure
referred to. shall be constructed in
accordance with the conditions pre-
scribed for the respective classes OF
buildings as set forth in this Ordi-
nance.
Sec. % DIFFERENT TYPES IN
ONE BUILDING. When any build
ings shall be erected with different
sparts 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 walls and floors. and
all openings in 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 30 CLASSES OF Build
INGS. For the purposes OF this
Ordinance buildings shall no