The Detroit times. [volume] (Detroit, Mich.) 1903-1920, 1911-02-21

prQonnB purposes snaii De MADE OF
and hsiises not less than fSs-
eighths M inch thick and with
rounded hilets at oil internal inter-
Such tile may be hard burned"
porous" or semi porous."
ias sa NJ or iI%s a stone OF Of o So%-
meree. Any other building stone
saualiy AZ strong and durable may
Stone used In concrete for foun-
dations must be clean and free
from DIRT and dust. and shall be
broken 70 pass through a two I'D
inch diameter ring. III used In fire-
proofing or moor construction the
stone shall be broken for a three
quarter lA) inch ring.
See. 5. SAND. May be either
lake. pit or bank sand free from
organic matter and clean and
Sec: O. LIME. The fresh burned
quickllme of commerce, or frst
quality hydrated lime.
Sec. z. CEMENT. Any natural
cement which In the product OF cal
cination of natural rock. as the
drauic cements
Sec. &. PORTLAND CEMENT.
The standard Portland cement or
-eatnmS reareIthsF domestic for.
eign, which when tested neat. after
one Cd day spent In air, shall be
ture. tensile stress OF two hun
dred t20O) pounds per square inch,
and after one "a day In air and
six cd days In water, be capable OF
sustaining without rupture a ten-
sile stress OF i've hundred (bOO)
pounds per square inch.
For. fireproohng or floor construcs
ton, tho highest grades OF Port
land cement shall be used. IL shall
be of uniform consistency ana OF
such fineness that not more than
ten (10) per cent will be rejected
by n sieve OF twenty-five thousand
t26,00o) meshes per square men,
OF sustaining without rupture a
tensile stress OF at least six hun
dred 5000 pounds per square inch
after one Cd day I'm air and TWEEN
ty-seven (27), days In water. and
all cement shall he subjected TO
such other physical or chemical
tests as may. be required In this
Sec. 3. MoRTARs. CAY Lime
mortar shall be made from one CD
part fresh lime and not more than
four CD parts of sand.
(B) Cement mortar shall be
made from one ul part cement
and not more than three CD par"
(C) Cement and lime mortar
shall be made with equal parts OF
cement and lime. and not more
than three (9 parts OF sand TO
each whole part OF cement ana
Sec. 10. PROPORTIONS OF
CONCRETE. The proportions or
materials for concrete used In
footings, foundations, walls and re-
tanning walls shall be as follows;
Not less than one part or cement
TO three (s) parts OF sand. and hve
(b1 parts of either broken stone.
Stag or gravel, to be thoroughly
mixed with the proper proportions
of clean water.
In quantities OF over nifty (50)
cubic yards, the concrete IL to be
mixed.
All concrete shall be used imme-
diately after mixing, and the ma
terials shall be mixed by measure:
5 Sec. IL. PORTLAND CEMENT
BRICKS. Portland cement bricks
made or Portland cement OF the
same dimensions as common brick,
may be substituted. except for
walls, piers and buttresses sustain,
ing heavy weights. provided said
Portland cement brick shall con-
form to the tests for materials pre-
scribed In this Ordinance.
Sec. IL. ARTIFICIAL STONE.
Artificial stone made OF Portland
cement and incombustible and
material. may be used
stone. But no artificial stone con-
tanning more than fifteen (16) per
cent of lime or crushed limestone,
shall be used as n Intel or bearing
part or any building over four 60
stories high.
the tests for materials prescribed
In this Ordinance.
Sec. Is. WROUGHT IRON. All
wrought iron shall be fibrous.
tough and ductlie. uniform In char
acter and having an ultimate ten
sile, strength OF not less than
thousand (4s,0o0)
pounds per square inch with q
limit Of twenty-sia thousand tss.o
0e0) pounds and an elongation OF
eig hteen us) per cent In eight (O
inches, including fracture when
tested In small specimens.
Sec. "a. CAST IRON. Except
where chilled iron is specified, all
free from injurious cold shuts or
blow holes, true to pattern and
having nm ultimate tensile strength
OF not less than sixteen thousand
(1s,000) pounds per square inch.
Sample pieces one Cd inch
square, cast from the same heat or
metal In sand moulds, shall be
span of four (D feet and eight CD
inches. center load of five hum
dred t0O pounds when tested In
the rough bar.
Sec. Is. STEEL CASTINGS. steel
castings shall be made by the open
hearth or crucible process and shall
be free from injuries, and blow
holes and shall have the following
requirements:
All steel castings shall be an
nealed.
Sample bars to develop at least
an ultimate strength OF seventy
thousand (70.000) pounds per
square inch, with a yield point or
commercial elastic limit OF thirty
one thousand Ave hundred (31, 5000
pounds per square inchs and IN
elongation of eighteen (18) per
cent in two (2) inches, including
five (25) per cent In area.
Sec. 16 STRUCTURAL STEEL
All structural steel including rivets.
shall have their physical and chem
zeal properties I'm accordance with
the Manufacturers Standard steel
as revised to Febru-
AIRY 6, 1908. and as found I'm the
hand books OF steel manufacturers
Sec. II. TESTS. The Depart
ment OF Buildings may require. at
any time, certified copies OF full
from recognized experts.
for any or all materials used In
buildings OF Types / and 2 and no
such materials shall be concealed
or built upon. until the Depart
ment OF Buildings. upon their re-
quest, shall have been furnished
with satisfactory proof that such
materials and workmanship are
fully equal to the standard,
Sec. is. NEW MATERIALS. Be
fore any new materials not. here
tofore employed are used as con-
strHntional parts of buildings or
structures. permission must be OBJ
tanned from the Department or
Buildings, who shall apply such
tests TO the said new materials as
may be necessary to determine the
strength and durability OF such