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

crete that a 90 Or m
crete shall BE- thpr@1r&IV
ana s resahsn e s sn6 se1e {.
ed IN the DroDor(i56 81 CO
sand. before any regular 49,
poured.
drawings, the time and the G1||
the pouring or the di4ef4n1
umns. Eirders ana moor sI9b9
Sec. ~. FREEzINo .WUAI
En- concrete work shall 1e1
% degrees Fahrenheit OF lee.
less sufficient precautions ere
ken to prevent the concroto d
freezing after having been Du1
suranes IL had that All frost
left the concrete and AZ hno 81
tained Its permanent set
No frozen material or matters
eo Seer 20 WIN ao zee w snsIl n 17s
crete laid during hot weather ~
be thoroughly wet with clean ~
ter twice daily during the IN
week after placing.
must be thoroughly wet bsfors -
Sec. II. coNcRErE coEu1
PROTECTION. The outsr shell
hooped column or iatticed stfu<
turat steel column. shah be NJ
only. and must not be inclu6e1 r.
determining the safe load. ~.
In fireproofing q structux
steel or cast iron column WIK
concrete. a reinforcement eonel1
shall be imbedded In the copoS6<1
Sec. II. TILE AND coNcRr1n
FLOOR CONSTRUCTION. when
tile and concrete constructions -
sound, hard-burned tile OF ul1e
The concrete joists shah -
parallel and In perfect line 80
not less than four CD inches yl1o
the top Of the tile for comprooB
sive stress IL must be poured -
the same time as the Joists ana %
must be OF the same mixture. e.
The tile should be thorouU1av
soaked with water before pouFinG
Sec. 20. MoNoLITHIc wAIx1.
AND PIERS. Monolithic conctG1o
walls. constructed In places with
out reinforcement. shall be ~
fun thickness prescribed IN th11
With steel or Iron reinforcsmeqA.
they shall be at least sixfy-okx
t66) per cent. OF the thickness re-
CURED for brick walls. ~
Reinforcement shall not -
i ons tb nan per on cent? of the srss
the cross section In each direction
Such concrete shall ~
thoroughly wet and proptrlY
worked and all voids filled. :
before adding the next succssdlh6
Sec: a.. INSPECTION AND
TESTS. All reinforced con-
s Sssts s0nstr uSss9 t snsii ~
sonai and constant su5Sf-
vision OF a competent suY6f~
inteudent, who shall be satiSfno-
tory to the department OF build
necessary by the department s.
buildings the contractor must -
prepared within q reasonable time
and at his own expense. to make
tests on a panel or panels AZ may
such tests shall be made aftsr
centering has been removed one
"a month. Each panel shall -
loaded over it's entire area with
a uniformly. distributed load equel
TO- tw hssn the he supsrimposSsd b 1ose
designed and under such test the
detection must not exceed ono
four-hundredth u-4o0) part Of
the span and the member must re-
turn to Its normal position afser
The department Of bu1ldtn&n
may require sworn copies of teoto
on all cements used In any rotn~
forced concrete work, such tooto
to have been made by one OF the
Standard Testing Laboratories
The department OF buildino9
may require special tests made o.
any carload OF cement or any por-
ton thereof or of any other ma
teria1 intended for reinforced conf
OF buildings shall have reason 70
question the full strength or quail
ity OF such cement or other ma.
terial. All such tests shall -
made at some acceptable standard
Tssns 81 sss s o ss tss
or. other material to be tested.
CEMENT BRIoUETTs. The mlp-
imum requirements for tensile
strength Tor briquetts. one CD
Lhou squofo ~ ~oSShs S
For Neat Cement.
"a hours In moist air, 400 lbs
days tone day In afr, six IN
water). 500 lbs; IS days Zone day
In air. twenty-seven In watsf)s
For One Cd Part Cement ana
Three CD Parts Standard Sand
z days Zone day In air. six In
water). It's lbs; IS days Zone day
In air. twenty-seven In watsr)s
ARTICLE XIV. Ia
Concrete Block Constructfon. ~
Section 1. WHERE ALLOWEp.
AND MATERIALS. Concrete build
ing blocks may be used for build
where the blocks are approved by
the Department OF Bufldinep-
These blocks shall be made OF one
part standard Portland cement 70
not more than three parts OF cle4F
crushed rock or other suitable ma.
teriai. The materials used shall
be free from dirt and other foreign
matter. properly mixed and manip-
Sec. 2. MAXIMUM PERCENT
AGE OF HOLLOW SPACE or
BLOCKS USED FOR DIFFERENT
HEIGHT WALLS. The hollow
spaces OF any block shall not ex.
coed the following percentages OF
the total cubic contents Of the
block for different heights of walls
and r. no case shall the thickness
OF any web OF any block be less
than one quarter OF the height OF
such block.
Stories 1st. End. ara. eth.
8 and 4 $50 ASH ASS ass
Sec. 8. THICKNESS OF WALLS.
The thickness OF walls for any
building where concrete blocks are
used, shall be the same a. that re-
CURED for brick walls.
Sec. 4 FACING OF BLOCKS
Where the face OF the wall only ~
TO be OF concrete building blocks
and the backing OF brick, the con-
, crete blocks must be strongly bond
ed TO the brick with ccncrete or
brick headers. PROJECTING four go