The Detroit times., 1911-02-20
ARTICLE VII.
Classification OF Buildings.

ARTICLE VII.
Classification OF Buildings.
Section /. 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 S.-Mill Construction.
Type Ordinary Construction.
Type 5.-Frame Construction.
Type Skeleton Construction.
Sec g. TYPE 1. FIREPROOF
CONSTRUCTION. This type OF con-
struction shall be applied to all
buildings In which all parts that
carry weights or resist strains. and
all stairs, and all stair and elevator
enclosures are TO be made entirely
OF incombustible material. and in
which all metallic structural mem-
bers are to be protected by fire-
proof coverings.
Sec. 3. FIREPROOF MATER
IALS. The materials which shall
be considered as fulfilling the re-
quirements OF hreproof materials
for walls. are:
Brick.
2-Stone.
3.-Concrete.
Terra Gotta.
5.-Hollow Burnt Clay Tile.
6-Cement Block or Tiles.
And for Non Bearing Parti-
tons
sum and fibre not less than 2
(b) Cement plaster on metal
lath applied TO metal studding. and
with a total thickness not less than
inches thick.
(c) Cement plaster on a fabric
combining metal lath and metal
studding and with a total thick
ness not less than inches thick.
Combustibie material covered
paint shall not be considered as
freproof material.
Sec. 4. FIREPRoOF COVER
INGS FOR METAL The materials
and construction OF fireproof 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 fianges and
all hollow spaces behind the brick
filled solid with fireproof material.
Such brick covering shall be
thoroughly bonded.
Sec. g. BLOCKS Hollow tile and
burnt clay, porous terra Gotta or
concrete blocks. not less than two
go inches thick outside OF the ex-
treme metal hanges.
All such blocks, II made hollow,
shall have hanges and webs AT
least fve-eighths CD inches thick
and webs not more than six CD
inches apart.
All such blocks are TO be applied
TO the metal In. bed OF cement
mortar and the hollow spaces be.
hind the blocks shall be nlled soiid
with fireproof material.
All such covering shall be frm-
ly secured TO the metal.
Sec. z. CONCRETE. Concrete
applied directly to the metal OF
the constructive members. or on
metal lath. and at least one and
one half 1h) inches thick OUT
side OF the extreme metal flangfs
and with hollow spaces behind the
coverings. filled solid with nre-
proof material. All such cover
ing shall be firmly secured to the
lower Ranges of girders and beams
by wire or metal clips
Sec g. METAL IN EXTERNAL
WALLS. Metallic Structural Mem.
beers. located IN External Walls shall
be protected on the outer side by az
least eight 81 inches OF brick or SIX
1gl Inches OF other Fireproof Mate
rial or combination OF any two.
In Skeleton Construction, the
mates and shelves carrying walls or
fireproohng may come within Two
(2) inches of the face OF the wall.
The underside of spandril beams
ahali be protected by a covering
al least six (6) inches of Fireproof
Sec 3. cINDER CONCRETE.
Tho use OF Cinder Concrete In the
construction OF floors, ceilings and
roofs and for Eireproohng Structur-
al Members and also for filling back
OF Fireproof coverings OF metal. Is
pS sen 10. COLUMNS BOUND. For
Columns entirely surrounded by
Fsireproof Blocks, these blocks shall
he securely bound with wire OF not
less than number fourteen DAD
gauge.
tend from the constructive floor arch
or slab. OF a story to the un-
derslde OF the arch or slab OF the
story above.
There shall be no pipes. wires or
conduits incased within the Fire
proof Coverings or any Columns
Sec. fl. PLASTER NOT IN
CLUDED. The thickness OF the
FIreproof Covering herein called
FOR shall be exclusive of any
plaster afterwards applied. Lath
sidered Fireproof.
sec. IL. GYPSUM. Gypsum
blocks and tiles shall have not more
than six (0 per cent by weight OF
fibre and webs not less than one ID
inch thick and the mortar used shall
be OF the same material or OF Port
land Cement.
Sec. 10. FLOOR CoNsTRUC-
TION. The floor OF Fireproof Con-
struction shall be made OF.
(a) Brick arches not less than
eight (S) inches thick. having am
pie rise, well keyed and laid In ce-
rneut mortar