The Detroit times., 1911-02-21


Terra Gotta or Cement Floor blocks.
not less than eight go inches deep.
having proper skewbacks and keys.
also shoes 10 No the metal beapis:
Hollow Blocks shall have Webs and
ribs not less than fiye-eighths 90
inches thick. Such Floor Blocks
shall be laid I'm Cement mortar.
(c) Reinforced Concrete made
as hereinafter described in Article
1dj other incomhustible ma
teriaisf which have been accepted
and approved for floor construction
by the National Board OF Fire I'm
derwriters and by the Department OF
Sec. IL. FILL UNDER FLOORS.
Where wood floors are used over
Flreproof Floor Construction the
entire space between the top OF the
floor construction and the underside
OF the fnished floor shall be fiiled
Cinder Concrete made OF one uD
part Portland Cement and not moro
than eight 90 parts OF we'll burnt
cinders may be used.
Sec. is. CEILINGS. Ceilings in
fireproof construction. shall be en-
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. 1s. TYPE 2. PROTECTED
, CONSTRUCTION; rhis type OK con,
buildings In which all enclosing
walls and the roof covering are TO
be made OF incombustible material.
and oil interior bearing walls OF
beams and Orders made or metal
protected with fireproof material, as
herein described for hreproof con-
struction.
All stairs and elevator enclosures
shall be made entirely or 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 (1%) inches OF solid wood
sub-hoor, having on II one layer OF
one and one-half ulD pounds per
Fights CD inch finished wood floor.
IL the sub-fioor be less than three
and one-half (SiD inches thick. II
shall be splined or tongued and
grooved.
OF seven lights CID inch ilooring
with two CD inches OF mortar may
be used I'm place OF the one and
three-quarters G&) inches OF
solid floor and asbestos paper.
Floors ceilings and roofs, con-
structed OF wooden beams and toists.
shall be covered on the underside
with at least one I'D inch or nre-
proof material and at least one CD
coat OF plaster.
Metal lath and plaster shall not
be deemed sufficient for the one
I'd inch OF fireproofing.
Where beams are used. az I'm mill
construction. and the underside OF
the flooring on the beams serves as
the ceiling. this one III inch OF fire.
PROBING and plaster must be applied
TO the sides and bottom OF the beams
and to the underside OF the floor.
On the top OF ceilings, one Cd inch
OF 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-
Wood Turing for walls or wood
lath will not be allowed:
Sec. II. TYPE 3. MILL. CON-
STRUCTION. This type OF con-
struction shall be applied to all
buildings In which enclosing walls
and the roof coverings are to be
made or 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 COW
cred on top with at least one and
three-quarters QsD inches OF solid
wood sub-fioor. having on IL at least
one % layer OF one and one-halt
ui0 pounds per yard asbestos paper
Tor two CD inches OF mortar) and a
seven-eights Ga inch finished wood
floor. IL the sub-foor be less
than three and one-half (31k) 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 (5s) 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 (D inches
thick.
II such buildings are four "a or
more stories In height. the stair and
elevator enclosures shall have self
closing, st3ndard fire doors, and the
windows NJ interior walls shall have
metal frames and wire glass.
Wood Turing for walls shall not
be allowed.
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 In such a manner
as TO be self-releasing.
Wood beams and girders having
cross section less than eighty
800 square inches, shall be In solid
pieces and where two (2) or more
pieces are used to form q beam, they
shall be bolted together at intervals
OF not over thirty-six $3.50 inches and
with bolts not less than one-half
ga 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
into the wall.
co sSs; Is T9SE Ts, o tHse ~ e1n
struction shall be applied to all
buildings In which the enclosing
walls are 10 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 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
Wood frames covered with brick.
stone or cement veneer. shall be
'classed In this type.
Sec. 90. TYPE 6. SKELETON
CONSTRUCTIONS. 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-
f flDns Ky Of ,ron nkeie op steel oi
or reinforced concrete. Such build
ing may be fireproof or pro-
tected construction, or may have
mill construction floors and all
skeleton construction buildings must
be governed by the requirements as
set forth for these typeS.