The Detroit times. [volume] (Detroit, Mich.) 1903-1920, 1911-02-20

sec 81 'ho LOT noor
PROBING purposes shall be made OF
pure clay. we'll burned. with webs
and nanges not less than nVe-
eighths (t) inch thick and with
rounded hiiets at all internal inter-
such tile may be hard burned. /"
porous" or semi porous.
Sec. 4. STONE. Stone herein re-
ferred to 10 good quality OF build
ing sand or lime stone OF COM
merce. Any other building stone
equally as strong and durable may
stone used In concrete for foun-
dations must be clean and free
from dirt and dust. and shall be
broken to pass through a two I'D
inch diameter ring. II used In fire-
PROBING or floor construction the
stone shall be broken for a three
quarter (A) inch ring.
Sec. s. SAND. May be either
lake. pit or bank sand free from
organic matter and clean and
See, 8 LINE N 49,. The fresh burned
quality Migrated lime.
Sec. z. CEMENT. Any natural
cement which is the product OF cal
cination OF natural rock, as the
Akron, Louisville or other hy-
draunc cements.
Sec. 8. PORTLAND CEMENT.
The standard Portland cement OF
commerce. either domestic or for
eign. which when tested neat, after
one ID day spent In air, shall be
capable of sustaining without rup-
ture, a tensile stress OF two hun.
dred t20O pounds per square inch.
and after one Cd day In air and
six l6) days In water. be capable or
sustaining without rupture ten
sile stress OF five hundred (bOO)
pounds per square inch.
For fireprooing or moor construc-
ton. the highest grades OF Port.
be or uniform consistency and OF
such hneness that not more than
ten (l0) per cent will be rejected
by a sieve OF twenty-five thousand
t25, 00oD meshes per square inch,
and In addition IL shall be capable
of sustaining without rupture a
tensile stress OF at least six num-
dred (60O) pounds per square inch
after one Cd day In air and TWEEN
ty-seven (27) days In water. and
all cement shall be subjected TO
such other physical or chemical
tests as may be required In THIS
Sec. 3. MoRTARs. ca Lime
mortar shall be made from one ~
part fresh lime and not more than
four D parts OF sand.
OBJ Cement mortar shall be
made from one ca 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 CD parts OF sand 10
each whole part OF cement and
e. N ppopoprIoNs OF
CONCRETE. The proportions Of
materials for concrete used In
footings, foundations. walls and re-
tanning walls shall be as follows:
Not less than one part OF cement
10 three CD parts OF sand. and nve
Stag or gravel. to be. thoroughly
mixed with the proper proportions
OF clean water.
In quantities OF over nifty (5O)
cubic yards, the concrete Is to be
machine mixed.
diately after mixing, and the ma
terials shall be mixed by measure:
Sec. IL. PORTLAND CEMENT
BRICKS. Portland cement bricks
made of 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
waterproof material. may be used
as a substitute for any natural
stone. But no artificial stone con-
tanning more than fifteen uD per
cent OF lime or crushed limestone.
shall be used as a Intel or bearing
part OF any building over four 60
Artificial stone must conform to
the tests for materials prescribed
In this Ordinance.
Sec. 10. WROUGHT IRON. All
wrought Iron shall be fibrous.
tough and ductile, uniform In char
acter and having. an ultimate ten
forly-eisht Thousand us,oOo1
pounds per square inch with q
yield point or commercial elastic
limit OF twenty-six thousand (26.-
000) pounds and an elongatfon or
eighteen uS per cent in eight (O
inches. including fracture when
Sec. "a. CAST IRON. Except
where chilled iron Is specified, all
castings shall be tough grey iron,
free from Injurious cold shuts or
blow holes, true to pattern and
having an ultimate tensile strength
OF not less than sixteen thousand
Gs,0oo) pounds per square inch.
Sample pieces one Cd inch
square. cast from the same heat OF
metal In sand moulds. shall be
capable OF sustaining on a clear
span OF four ca feet and eight (s)
dred (e00) 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
minimum requirements:
All steel castings shall be an
nealed.
sample bars to develop at least
an ultimate strength or seventy
thousand (70.000) pounds per
square inch, with a yield point or
commercial elastic limit OF thirty
one thousand Ave hundred (3l, 500)
pounds per square inch and IN
elongation OF eighteen 1D per
cent In two CD inches, including
fracture and a reduction OF twenty
'fivs t2S, per sT cent IN area s9 srpr1
All structural steel including rivets.
shall have their physical and chem
ical properties In accordance with
the Manufacturers Standard Steel
Specifications, as revised to Febru-
airy 6, 1908, and as found In the
hand books OF steel manufacturers.
Sec. II. TESTS. The Depart
ment OF Buildings may require. at
any time, certified copies or full
inspection from recognized experts,
for any or all materials used In
buildings OF Types 1 and 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-
structional parts OF buildings or
structures, permission must be OBJ
tanned from the Department OF
Buildings. who shall apply such
tests to the said new materials as
-, 10 nacaaaarv 10 determine the