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

work When old bricks are 10 be
ss sh sSsa : sSa be- BE wh sSsou ssls
and well burned
Sec !. TILE. All tile for floor
or wall construction or for fire-
PROBING purposes shall be made OF
s snd Ssn.es not less than ave.
eighths (w) inch thick and with
ropnded hilsts at all internal inter-
such the may be .hard burned"
rsecg T. STONE. Stone herein re-
ferred TO IL good quality OF build
ing sand or lime stone OF COM
msrce. Any other building stone
souaily 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 20 pass through a two iO
proonng or fioor construction the
stone shah be broken for a three
quarter (&) inch ring.
Sec s. SAND. May be either
organic matter and clean and
Sec. 6 LIME. The fresh burned
Quickllme OF commerce. or nrst
quality hydrated lime.
Sec. z. CEMENT. Any natural
cement which IL the product OF cal
cination OF natural rock, as the
Akron Louisville or other hy-
Sec 8. PORTLAND CEMENT.
The standard Portland cement or
commsrce. either domestic or for
eign. which when tested neat, after
one I'D day spent in air, shall be
capable 81 staan,ns %ts t%a sS S
drsd (2o0) pounds per square Inch,
aud after one ca day In air and
six CO. days In water, be capable or
sustaining without rupture ten
sile stress OF Ave hundred lbOO)
pounds pes square inch.
For freprooting or floor construc-
ton. tho highest grades OF Port.
land cement shall be used. IL shaii
be OF uniform consistency ana OF
such fineness that not more tnan
ten (10) per cent will be rejected
by a sieve OF twenty-five thousand
t2500n) rneshes per square men,
and In addition IL shall be capable
sustaining without rupture a
tensile stress OF at least six hum
drsd i(600) pounds per square lnch
after one ~ day In air ana TWEEN,
ty-seven (27) days I'm water, ana
all cement shall be subjected 10
tests as may be required In this
Sec. o.. MoRTARs. (A) Lime
mortar shall be made from one %
four "a parts OF sand.
-(Bb Cement mortar shall be
made from one Cd part cement
and not more than three CD parts
tC) Cement and lime mortar
shall be made with equal parts OF
cement. and lime, and not more
than three CD parts OF sand TO
each whole part OF cement ana
e.. N ppopoRrIoNS OF
CONCRETE. The proportions OF
materials for concrete used In
footings, foundations. walls and re-
tanning walls shall be as follows:
TO three (3) parts OF sand. and Ave
CD parts OF either broken stone,
Stag or gravel. to be Thoroughly
mixed with the proper proportions
In quantities Of. over nifty (5D
cubic yards, the concrete Is to De
machine mixed.
All concrete shall be used imme-
diateIy after mixing, and the ma
See, IL. PORTLAND CEMENT
BRICKS. Portland cement bricks
made OF Portland cement OF the
same dimensions as common brick,
may be substituted, except TOT
walls, piers and buttresses sustain
ing heavy weights. provided said
Portland cement brick shall con-
form to the tests for materials pre-
scrlbed In this Ordinance
Sec. IL. ARTIFICIAL STONE.
Artificial stone made OF Portland
cement and incombustible and
waterproof material, may be used
as q substitute for any natural
stone. But no artificial stone con-
tanning more than fifteen l1O per
cent OF lime or crushed limestone.
shall be used as a Intel or bearing
part Of any building over four (D
stories high.
Artificial stone must conform to
In this Ordinance.
Sec. IL WROUGHT IRON. All
wrought iron shall be flbrous.
tough and ductile. uniform In char
acter and having an ultimate ten
sor s sarsns'n tS 70 aSt less .soeep
pounds per square inch with a
yield point or commercial elastic
limit OF twenty-six thousand t26.-
0oo) pounds and an eiongation of
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 OF
blow holes. true to pattern and
having nm ultimate tensile strength
OF not less than sixteen thousand
15,oOo) pounds per square 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 CD
inches, center load OF Ave hun
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
Sample bars to develop at least
an ultimate strength of seventy
thousand (7o.00o) pounds per
square inch, with a yield point or
one thousand five hundred tS1,5oO
pounds per square inch and IN
eiongation OF eighteen 1S) per
cent In 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
ical properties In accordance with
the Manufacturers Standard Steel
Specifications, as revised to Febru-
airy 6, 1903, and as found In the
hand books of steel manufacturers.
Sec, ~. TESTS. The Depart
ment OF Buildings may require, at
any time, certified copies 'of 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-