The Detroit times., 1911-02-21


Terra Gotta or Cement Floor Blocks.
not less than eight 90 inches deep.
having proper skeWbacks and keys.
also shoes 60 NJ the metal beams;
Hollow Blocks shall have Webs and
ribs not less than nve-elghths lh)
inches thick. Such Floor Blocks
shall be laid I'm Cement mortar
(c) Reinforced Concrete made
as hereinafter described In Article
edj Other uncomfortable ma
terials which have been accepted
and approved for floor construction
by the National Board OF Fire I'M
dcrwriters 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 floor shall be filled
Cinder Concrete made OF one ID
part Portland Cement and not more
than eight (S) parts or well burnt
cindcrs may he used.
Sec. rs. CEILINGS. Ceilings In
hreproof construction. shall be en-
tirely OF fircproof materials and
when used for. ceilings only. they
may be OF light construction. but
must be so constructed that they
bear no weight OF floors or roofs.
Sec. Is. TYPE 2. PROTECTED
CONSTRUCTION. This type OF con.
struction shall be applied TO all
buildings In which all enclosing
walls and the roof covering are 20
be made OF IncomDusttbte mutcrtaf,
and all interior bearing walls or
brick or concrete or having columns;
beams and girders made OF metal
protected with fireproof material. as
herein described for freproof con-
All stairs and elevator enclosures
shall be made entirely or incom-
The floor beams or Joists. floors.
roofs and ceilings may be made or
wood protected with hreproof ma
Floor beams shall be covered on
top with at least one and three.
quarters (i%) inches OF solid wood
sub-fioor. baving on IL one layer or
one and one-half Uh) pounds per
yard asbestos paper and seven
Fights Ga inch finished wood moor.
IL the sub floor be less than three
and one-half $50 inches thick. IL
shall be splined or tonsued ana
grooved.
on moor joists. one % thickness
OF seven-eights CD inch hooring
with two CD inches OF mortar may
be used In place OF the one and
three-quarters U%) inches or
solid floor and asbestos paper.
structed OF wooden beams and toists.
shall be covered on the underside
with at least one ID inch OF nre-
proof material and at least one I'D
coat OF plaster.
Metal iath and plaster shall not
be deemed sufficient for the one
Cd inch OF fireproofng.
Where beams are used. as In mill
construction. and the underside OF
the flooring on the beams serves as
PROBING and plaster must DE applied
10 the sides and bottom OF the beams
and 20 the underside OF the floor.
On the top OF ceilings. one Cd inch
or mortar or similar and approved
material will be deemed sufficient
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 soffit OF stairs.
Wood Turing for walls or wood
Iath viii not be allowed.
Sec. II. TYPE 8. MILL con-
STRUCTION. This type OF con-
struction shall be applied to all
buildings In which enclosing walls
and the roof coverings are 10 be
made OF incombustible material and
all interior walls or 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-quarters QA) inches OF solid
wood sub-fioor. having on II Mt least
one I'D layer OF one and one-half
uiD pounds per yard asbestos paper
Cor two CD Inches OF mortar) and
seven-eights CD Inch finished wood
floor. II the sub-io be less
thick. IL shall be spiined, or tongued
and grooved.
The columns, IL OF wood, shall
have a sectional area OF not less
than sixty 600 square inches.
The girders and beams II 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 az inches
thick.
II such buildings are four az 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
Wood posts shall have metal caps
forming base for the post above
and the ends Of girders shall be Sc
cured TO the cap In such a manner
as TO be self-releasing.
Wood beams and glrders having
a cross section less than eighty
(s0) square inches, shall be in solid
pieces and where two I'D or more
pieces are used to form beam. they
shall be bolted together at intervals
OF not over thirty-six $3.50 inches and
with bolts not less than one-half
"a inch In diameter.
The ends of all wood beams and
gtrders resting in walls shall be cut
beams and Orders shall not extend
into the wall.
Sec: ls: TYPE 9: ORDINARY
CONSTRUCTION. This type of con-
buildings in which the enclosing
walls are TO be OF incombustible ma
terial. but In which the interior
timber and iron structural parts are
not protected with fire resisting COW
ering.
Sec. 10. TYPE s. 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 I'm this type.
Sec 20. TYPE 8. SKELETON
CONSTRUCTION. BY this term
shall be meant all buildings in
which all internal loads and
strains, or both internal and
external loads and strains are
transmitted TO the founda-
lions by a skeleton or
framework of iron or steel
or reinforced concrete. Such build.
ing may be nreproof or pro-
tected construction, or may have
mill construction floors and all
skeleton construction buildings must
be governed by the requirements as
Firth Tor these fNnaa