The Detroit times., 1911-02-20

prOonub purposes shall DC MADE OF
pure clay We'll burned. with webs
and ,hanges not less than fve-
eighths k) inch thick and with
rounded hilets at all internal inter-
SUCH the may be hard burned"
Sec. 4. STONE. Stone herein re-
ferred TO II a good quality OF build
ing sand or lime stone OF COM
msrce. 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 he
broken 20 pass through a two i2)
inch diameter ring. IL used In fire-
stone shall be broken for a three
quarter iA) inch ring.
Sec. s. SAND. May be either
lake. pit or bank sand free from
organic matter and clean and
Sec. 6 LIME. The fresh burned
autcklime of commerce. or first
quality hydrated lime.
Soc. q. CEMENT. Any natural
cement which In the product OF cal
Akron. Louisville or other hy-
Sec. s. PORTLAND CEMENT.
The standard Portland cement OF
eommerce,. either domestic or for
eign. which when tested neat. after
one Cd day spent I'm air, shall be
capable OF sustaining without rup-
ture, a tensile stress OF two hun
dred (200) pounds per square inch.
and after one ca day I'm air and
six te) days In water. be capable OF
sustaining without rupture a ten>
sile stress OF Ave hundred 5000
pounds per square inch.
For fireproohng or moor construc-
ton, the highest grades OF Port
land cement shall be used. IL shall
be OF uniform consistency and OF
such hneness that not more than
ten l10) per cent Will be rejected
by a sieve OF twenty-five thousand
t25, Ooob meshes per square men,
and In addition II shall be capable
OF sustaining without rupture
tensile stress OF at least six hun
dred (600) pounds per square inch
after one ID day In air and TWEEN
ty-seven CID days In water, ana
all cement shall be subjected 10
tests as may be required In this
SEQ. ;. MoRTARs. (A) Lime
mortar shall be made from one Cd
part fresh lime and not more than
four ca parts OF sand.
tB) Cement mortar shall be
made from one Cd part cement
and not more than three CD parts
OF sand.
(c) Cement and limo mortar
cement and lime, and not more
than three CD parts OF sand TO
each whole part OF cement ana
lime,
Sec. 10. PROPORTIONS OF
CONCRETE. The proportions or
footings, foundations. walls and re-
tanning walls shall be as follows:
Not less than one part or cement
to three CD parts OF sand, and nVe
CD 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 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 (15) per
cent of lime or crushed limestone,
shall be used as a Intel or bearing
part OF any building over four CD
stories high.
Artificial stone must conform to
the tests for materials prescribed
IN this Ordinance
Sec. H.. WROUGHT IRON. All
wrought iron shall be fibrous.
tough and ductile. uniform In char
acter and having an ultimate ten
sile strength OF not less than
paagds psr sd fao~sana inch G sD0O
yield point or commercial elastic
limit OF twenty-six thousand (26,-
0o0) pounds and an elongation OF
eighteen (lS) per cent In eight tD
inches, including fracture when
tested in small specimens.
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
of not less than sixteen thousand
(1s.00o) pounds per square inch.
Sample pieces one Q) inch
square. cast from the same heat OF
metal In sand moulds. shall be
capable OF sustaining on a clear
span OF four (4) feet and eight (O
inches, a center load OF five hun
dred O00) 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
mimi Mum ranniTamQnta.
All steel castings shall be an
nealed.
Sample bars to develop at least
an ultimate strength OF seventy
thousand (7o.600) pounds per
square inch, with a yield point or
one thousand Ave hundred (31, 5000
pounds per square inch and On
elongatlon of eighteen 1S) per
cent I'm, two CD inches, including
fracture and a reduction OF twenty
Ave (25) per cent in area.
Sec. 16 STRUCTURAL STEEL.
All structural steel Including rivets.
shall have their physical and chem
zeal properties In accordance with
the Manufacturers Standard Steel
Specifications. as revised to Febru-
AIRY 8, 1908, and as found In the
hand books Of steel manufacturers.
ment. of Buildings may require. at
any time, certified copies of full
inspection from recognized experts,
for any OF 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
may be necessary to determine the
strength and durability OF such
materials