The Detroit times., 1911-02-21
ARTICLE VII.
Classification Of BuillfnKa.

ARTICLE VII.
Classification Of BuildfnEs.
Section 1. TYPES. For the pur-
pose OF this Ordinance, buildings
shall be divided into Types" in
accordance with their construction
as follows:
Type I.-Fireproof Construction.
Type 2.-Protected Construction.
Type 3.-Mill Construction.
Type 4.--Ordinary Construction
Type 6.-Frame Construction.
Type Skeleton Construction.
Sec. ?. TYPE /. FIREPROOF
CONSTRUCTION. This type of coz
struction shall be applied to all
buildings In which all parts that
all stairs. and all stair and elevator
enclosures are to be made entirely
of incombustible material. and In
which all metallic structural men,
bers are to be protected by fre-
proof coverings.
Sec. 5. FIREPRooF MATER
be Considered as fuinliing the re-
quirements OF freproof materials
for walls. are:
1.-Brick.
2.-Stone.
3.-Concrete.
4.-Terra Gotta.
5.-Hollow Burnt Clay Tile.
6.-Cement Block or Tiles.
And for Non-Bearing Parti-
tons
(a) A combination of pure Gypo
sum and fibre not less than
Cb) Cement plaster on metal
lath applied TO metal studding. and
with a total thickness not less than
inches thick.
combining metal lath and metal
studding and with a total thick
ness not less than 2 inches thick.
Combustible material covered
with any so-called hreproof
paint" shall not. be considered az
Sec. {. FiREPRooF COVER
INGS FOR METAL. The materials
and construction OF freproof COW
ering for metallic members shall
be as follows:
Sec. s. BRICK. Brick not less
than four ca inches thick. outside
OF the extreme metal fanges and
all hollow spaces behind the brick
filled solid with fireproof material.
Such brick covering shall be
thoroughly bonded.
Sec. 6. BLOCKS Hollow tile and
burnt clay, porous terra Gotta or
concrete blocks, not less than two
CD inches thick outside or the ex-
treme metal hanges.
All such blocks. II made hollow.
shall have fianges and webs at
least fve-eighths CD inches thick
and webs not more than six (t)
inches apart.
All such blocks are to be applied
TO the metal In q bed or cement
mortar and the hollow spaces be-
hind the blocks shall be filled solid
with fireproof material.
All such covering shall be firm
ly secured TO the metal
Sec. z. CONCRETE. Conerets
applied directly to the metal OF
the constructive members. or on
metal lath. and at least one and
one-half Gh) inches thick out
side OF the extreme metal Ranges
and with hollow spaces behind the
coverings. filled solid with IRE
proof material. All such cover
Ing shall be firmly secured to the
lower fianges of girders and beams
by wire or metal clips.
Sec. s. METAL IN EXTERNAL
WALLS. Metallic Structural Mem
bers. located in External Walls shall
be protected on the outer side by at
least eight 90 inches OF brick or six
fsl inches OF other Fireproof Mate
rial or combination OF any two.
In Skeleton Construction, the
plates and shelves carrying walls or
fireproonng may come within Two
12) inches OF the face OF the wall.
The underside OF spandril beams
shall be protected by covering
at least six (6) inches Of Fireproof
Ms see cINDER CONCRETE.
The use OF Cinder Concrete In the
construction OF floors. ceilings and
roofs. and for Fireproofng Structur-
al Members and also for filling back
OF Fireproof coverings OF metal, II
prS see 10 COLUMNS BOUND. For
aNNFHntIndAH
Eireproof Blocks, these blocks shall
lie securely bound with wire or not
less than number fourteen uD
Column Coverings must ex-
tend from the constructive floor arch
or slab, of story to tho un-
derside Of the arch or slab OF the
story above.
conduits incased within the Fire
proof Coverings OF any Columns.
sec. IL. PLASTER NOT. IN
Fireproof Covering herein called
for. shall be exclusive of any
plaster afterwards applied. Lath
and plaster alone shall not be con-
sidered Fireproof.
sec. IL. GYPSUM. Gypsum
blocks and tiles shall have not more
than six CD per cent by weight OF
fibre and webs not less than one I'D
inch thick and the mortar used shall
be OF the same material or OF Port
See is. FLOOR coNsTRUC-
TIoN. The fioor OF Fireproof Con-
struction shah be made Of.
(a) Brick arches not less than
xt-kt fel inrhaa fhlCE having ann