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

crete shall Be- thoroushly cIcc
and rou8hsnsd and have opDII0I
Il coating OF cement moFt6r CO
ed I'm the proportion of one (4/
s ssnd. s ss%ss' any y regular Sn esn1s>
The superintendent IN charge q
the work shall mark IN Ink on <11
drawings, the time and the eete q
umns. girders and foor slabs
Sec 10. FREEZING WEAIM~
Err Concrete work shall not ~
permitted when the Temperatures u
. ~ cs se,.s on s are
ken 70 prevent the concrete froM
freezing after having been put
All forms must remain until 81
left the concrsts and Il has Oh
tained It's permanent set.
No frozen material or materials
covered with Ice shall be used
Sec. 20. HOT WEATHER Con
crete laid during hot weather she'll
be thoroughly wet with clean W.
ter twice daily, during the nrDt
week after placing.
The broken stone. Stag or gravel
must be thoroughly wet before place
Sec. ii. CONCRETE COLUMN
PROTECTION. The outer sheIl of
a hoped column or latticed strut-
tural steel column. shall be con-
enis and :; mus, nos Sc inefSS:s
determining the safe load.
In hreproohng structural
steel or cast iron column with
concrete. a reinforcement constgt-
shall be imbedded in the concrsts
Sec ss. TILE AND coNcRErn
FLOOR CONSTRUCTION. Whom
tile and concrete constructicn -
sound. hard-burned tile OF UNI
form size.
The concrete joists shall be
parallel and In perfect line and
not less than four ca inche. wids.
should concrete be needed on
the top OF the tile for compres-
sive stress II must be poured At
the same time as the Joists and IL
must be of the same mixture.
The tile should be thoroughly
the concrete.
Sec. 20. MoNoLITHIc WALLS
AND PIERS. Monolithic concreto
walls. constructed In places with
out reinforcement. shall be the
ordinance for brick walls. and
with steel or iron reinforcsment.
they shall be at least stxty-stx
(se) per cent: OF the thickness re-.
CURED for brick walls.
les. R ;saS snsaaar ssa Pss 3
one I'd per cent: OF the AREA Of
the cross section In each direction
Such concrete shall b
tn .rSsS aSa a. vet xo,a and ALL. properly
Exposed top surfaces shaIl be
thoroughly cleaned and dampened.
before adding the next succeeding
rS ssf; a. AN INSPECTION rs;c9a9osa AND AMI,
performed under the per-
sonal and constant super
vision OF q competent super
inteudent.. who shall be satisfac
tory to the department of build
II loading tests are considered
necessary by the department. OF
buildings the contractor must Dc
prepared within a reasonable time
tests on a panel or panels az may
be directed.
Such tests shall be made after
centering has been removed one
nas month nnr Each rI panel r snai, Ia, e
a uniformly distributed load equal
TO twice the superimposed load
for which the structure has been
designed and under such test the
four-handredth ti-4oc) part OF
the span and the member must re-
turn TO its normal position after
the removal of the load. $500
- The department OF buildings
on all cements used In any rein
forced concrete work. such tests
to have been made by one OF the
Standard Testing Laboratories
The department of buildings
any carload Of cement or any por-
ton thereof or of any other ma
terial intended for reinforced con-
crete work. when the Department.
OF buildings shall have reason 20
fly OF such cement or other ma
terial. All such tests shall pc
made at some acceptable standard
Testing Laboratory. and at the OK
pense OF the owner Of the cement
or s Gteer a %s'er sTR r n CT III II OF
CEMENT BRIoUETTs. The min
imum requirements for tensile
strength Tor briquetts, one Cd
inch square In section. shall be -
follows:
For Neat Cement.
20 hours In moist air. 200 lbs.
days Zone day In air, six In
water). 500 lbs; 2s days Zone day
In air. twenty-seven In watsr).
For One % Part Cement and
Three CD Parts Standard Sand.
days Zone day In air. six I'm
water). It's lbs; 20 days Gone day
In air. twenty-seven In watsr).
ARTICLE XIV.
Concrete Block Constructios.
section /. WHERE ALLoWEp.
AND MATERIALS: Concrete build-
ing blocks may be used for build
where the blocks are approved by
These blocks shall be made OF one
part standard Portland cement to
not more than three parts of clear
crushed rock or other suitable ma.
terial The materials used shall
be free from dirt and other foreign
matter. properly mixed and manip-
AGE OFF HOLLOW SPACE OF
BLOCKS USED FOR DIFFERENT
HEIGHT WALLS. The hollow
spaces OF any block shall not ex-
the total cubic contents of the
block for different heights OF walls
and IN no case shall the thickness
OF any web OF any block be less
than one-.auarter of the height OF
Stories. 1st. End. srd. 4th.
snS ss% tss 4S% IS.
Sec. 8. THICKNESS OF WALLS.
The thickness OF walls for any
building where concrete blocks are
used. shall be the same as that re-
CURED for brick walls.
Sec. 4 FACING OF BLOCKS.
Where the face OF the wall only Is
TO be OF concrete building, blocks
and the backing OF brick. the con-
crete blocks must be strongly bond
ed to the brick with concrete or
brick headers, projecting four ca
inches into the brick work. every
fourth (4th) course being header
course. OF bonded with metal wall
ties. spaced not 10 exceed eighteen
(lS inches In each direction.
aac MORTAR All walls