The Detroit times. [volume] (Detroit, Mich.) 1903-1920, 1911-02-23


not less than eight go inches deep.
having proper skewbacks and keys.
also shoes TO NJ the metal beams:
Hollow Blocks shall have Webs ana
inches thick. such Floor Blocks
shall be laid In Cement mortar
(c) Reinforced Concrete made
as hereinafter described In Article
Cdj other incombustibie ma:
terials which have been accepted
and approved for moor construction
by the National Board OF Fire I'm
derwriters and by the Department OF
Sec. IA. FILL UNDER FLOORS.
Where wood floors are used over
Fireproof Floor construction the
entire space between the top OF the
floor construction and the underside
OF the finished moor shall be illed
Cinder Concrete made OF one I'D
part Portland Cement and not more
than eight CD parts OF we'll burnt
cinders may be used.
Sec. Is. CEILINGS. Ceilings In
flreproof construction. shall be en-
,irsiy 81 nfSPro ssIlpns oniy ,heS
may be OF light construction. but
must be so constructed that they
bear no weight OF floors or roofs.
Sec. ls. TYPE . PROTECTED
CONSTRUCTING; This type OF con,
buildings in which all enclosing
walls and the roof covering are 10
be made Of incombustible material.
and all interior bearing walls OF
brick Sss or .SS s;rdsf or mSds Of meas
protected with nreproof material. rs
herein described for nreproof con-
struction.
All stairs and elevator enclosures
shall be made entirely OF incom-
bustible material
The floor beams or joists. floors.
roofs and ceilings may be made or
wood protected with fireproof ma
terial.
Floor beams shall be covered on
top with at least one and three.
quarters Q%) inches OF solid WOOD
one and one-haif Q1D pounds per
yard asbestos paper and seven
Fights (t) inch finished wood moor
IL the sub floor be less than three
and and ops-hal n,,n 60 ~ ,neh aensued I ana
grooved.
On fioor joists. one % thickness
OF seven-eights (R) inch nooring
with two CD inches OF mortar may
be used in place OF the one and
soiiS iioor snd asbestos paper
Floors ceilings and roofs. con
structed OF wooden beams and joists.
shall be covered on the underside
with at least one u) inch OF IRE
coat OF plaster.
Metal lath and plaster shall not
be deemed sufficient for the one
Cd inch of fireproofing. -,
Where beams are used. as In mill
construction. and the underside OF
hA hAa
the ceiling. this one Cd inch OF nre-
proofing and plaster must be applied
to the sides and bottom OF the beams
and to the underside OF the Moor.
On the top OF ceilings, one Cd inch
OF mortar or similar and approved
material will be deemed sumcient
fire 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 lath and ce-
ment plaster: also the soflit OF nr stairs snnd
lath will not be allowed.
Sec. II. TYPE 3. MILL con-
STRUCTION. This type or con.
struction shall be applied to all
and the roof coverings are TO be
made Of incombustibie 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 COW
cred on top with at least one and
three-auarters QD inches OF solid
one D fuD layer Of aAt ons and one-haif
QiS pounds per yard asbestos paper
Tor two CD Inches OF mortar) and a
seven-eights Cd inch finished wood
floor. IL the sub floor be less
than three and one-half (3h) inches
thick. 1t shall be splined, or tongued
and grooved.
The columns. IL OF wood. shall
have n sectional area OF not less
than sixty 600 square inches.
The Orders and beams IL Of wood,
shall have a sectional area OF not
less than fifty-six (56) square inches.
Columns, Orders and beams, IL or
metal, shall be covered as In Pro
tected Construction"
Stair and Elevator enclosures shall
be made entirely OF incombustible
material. at least four CD inches
thick
III such buildings are four 90 OF
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
Wood posts shall have metal caps
forming a base for the post above
and the ends OF Orders shall be Sc
cured to the cap I'm such manner
as to be self-releasing.
Wood beams and girders having
a cross section less than eighty
ts0) square inches, shall be I'm solid
pieces and where two CD or more
pieces are used to form a beam, they
shall be bolted together at intervals
OF not over thirty-six (36) inches and
with bolts not less than one-half
az inch in diameter.
The ends of all wood beams and
on bevel so that the top edge OF
beams and girders shall not extend
into the wall.
sss Is T9SE Th,, 3 t1se N cory
struction shall be applied TO all
buildings In which the enclosing
walls are to be OF incombustible ma
terial. but IN which the interior
not protected with fire resisting COW
Sec. 10. TYPE s. FRAME CON-
struction. This type of construc-
ton. shall be applied TO all buildings
in which enclosing and interior walls:
entirely OF wood.
Wood frames covered with brick.
stone or cement veneer, shall be
classed in this type. -
CONSTRUCTION. BY this term
shall be meant all buildings I'm
which all internal loads and
strains, or both internal and
external loads and strains are
tons by a skeleton or
framework of iron or steel
or reinforced concrete. Such build
ing may be hreproof or pro-
tected construction, or may have
mill construction floors and all
skeleton construction buildings must
be governed by the requirements as