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

$4,000 square feet OF floor area, IL
the building be but one story In
height. nor more than 10000 square
feet IL more than one story In
height.
ARTICLE VII.
Classification OF Buildings.
Section 1. TYPES. For the pur-
pose OF this Ordinance, buildings
shall be divided into Types" In
accordance with their construction
Type 1.-Fireproof Construction.
Type 2.-Protected Construction.
Type 3.-Mill Construction.
Type ORDINARY Construction.
Type 6.-Frame Construction.
Type 6.-Skeleton Construction.
Sec. 2. TYPE I. FIREPROOF
CONSTRUCTION. This type of corr
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 men,
bers are to be protected by fire-
Sec. 8. FiREPRooF MATER
IALS. The materials which shall
be considered as fulfilling the re-
quirements OF nreproof materials
for walls. are,
1.-Brtck.
2.--Stone.
3.-Concrete.
4.-Terra Gotta.
5.-Hollow Burnt Clay Tile.
s.--Cement Block or Tiles.
7-And for Non Bearing Parti-
Ca) A combination of pure Gyp-
sum and fibre not less ethan
inches thick.
(b) Cement plaster on metal
lath applied to metal studding. and
with a total thickness not less than
(c) Cement plaster on a fabric
combining metal lath and metal
studding and with a total thick
ness not less than inches thick.
Combustible material covered
with any so-calied hreproot
paint shall not be considered as
Sec. 4. FIREPRooF COVER
INGS FOR METAL The materials
and construction OF freproof COW
erlnR for metallic members shall
be as follows:
than four (D inches thick. outside
of the extreme metal Ranges 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
t2) inches thick outside OF the ex-
treme metal fanges:
All such blocks. II made hollow.
shall have fianges and webs at
least fve-eighths CD inches thick
and webs not more than SIX toJ
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 sohd
with fireproof material.
All such covering shall be nrm-
Iy secured to the metal
Sec. Z. CONCRETE. Concrete
applied directly TO the metal or
the constructive members. or on
metal lath. and at least one ana
one-half Gh) inches thick out
side of the extreme metal hanges
and with hollow spaces behind the
Coverings. filed solid with IRE
n1aaf material. All such cover
ing shall be firmly secured TO the
lower Ranges OF girders and beams
by wire or metal Clips.
Sec. s. METAL IN ExTERNAb
WALLS. Metallic Structural Menu
hers. located In External Walls shall
be protected on the outer side by az
least eight (s) inches OF brick or SIX
1s1 inches of other Fireproof Mate
rial. or combination OF any two.
Tn skeleton Construction. the
plates and shelves carrying walls or
dreproofing may come within TWO
1sl inches OF the face OF the wall.
The underside OF spandril beams
.baii be protected by a covering
at least six ts) inches of Fireproof
Material
Sec. O. cINDER CONCRETE.
The use OF Cinder Concrete In tho
Construction OF floors. ceilings and
roofs. and for Fireproofing structur-
nj Members and also for filling back
OF Fireproof coverings OF metal. Is
prS ssn 10 COLUMNS BOUND. For
Columns entirely surrounded by
Fireproof Blocks, these blocks shall
he securely bound with wire of not
less than number fourteen GD
hii Column Coverings must ex-
tend from the constructive floor arch
or slab. Of a story to the un-
derslde OF the arch or slab Of the
story above.
proof Coverings OF any Columns.
Sec. II. PLASTER NOT IN
CLUDED. Tho thickness OF the
Fireproof Covering herein called
for. shall be exclusive OF any
and plaster alone shall not be con-
sidered Fireproof.
Sec. H. GYPSUM. Gypsum
blocks and tiles shall have not more
than six (6) per cent by weight OF
fibre and webs not less than one 1l
inch thick and the mortar used shall
be OF the same material or OF Port
land Cement.
Sec. 10. FLOOR CoNsTRUC-
TON The floor or Fireproof Con-
struction shall be made Of.
(aJ Brick arches not less than
eight (s) inches thick. having am
ment mortar.