The Detroit times., 1911-02-23

and rou4hene6 and 49,
coating % ceu4ut
sAnd. before any rsGo1ev ~
The supsrintsndsat ~ eharro
sns Toss , r.. ,In syk ss5 q ~ ~
the pouring Of the dineren> @
Sec Is. rhEEziSo Wa
ER Concrete work shall ~
% degrees Fahrenbsit or le1o. n
less SUFFICIENT precautions 1r1 O.
ken 70 prevent the concro<o U|0
f,eezing after having been pp<
All forms must remain unefI ~
suranee Is had that all frost ~
left the concreto aud u hnn IN
tanned its permanent set
No frozen material Or met1r>n
Sec 90 Hot wExfHER cS1
crete laid during hot weathor ol1oI
be thoroughly wet with c1oan WU<<
ter twice daily, during the n51[
week after placing. 81
The broken stone. Stag o. GrovC||
must be thoroughly wet bsfore plop>
In the mixer. <
Sec. II. CONCRETE coLU1x1
PROTECTION. The outer she'll c.
q hoped column or latticed etruot
tural steel column. shall BE- co.,
only. and must not be included 81
determining the safe load
In hreproofng . structor1I
steel or cast iron column With
concrete. q reinforcsmsnt constee-
shall be imbedded IN the concrelo
Sec. II. TILE AND coNcRnrn
FLOOR CONSTRUCTION. Whon
used for floors. the tile shall b.
sound. hard-burned tile Of uni
form size. W
The concrete joists shall s.
parallel and In perfect line and
not less than four (Sl Inches wido.
should concrete be needed on
the top OF the tile for compress
sive stress IL must be poured ~
the same time as the jofsts and 1t
must be OF the same mixture.
The tile should be thoroughlv
soaked with water before pouring
the concrete. {
Sec. 20. MONOLITHIC WALT
AND PIERS. Monolithic concrete
walls. constructed IN places with
out reinforcement. shall be the
o 9 snassns fos Pprisa was n
with steel or iron reinforcement,
they shall be at least sixty-e1x
t6e) per cent. OF the thickness re-
CURED for brick walls.
Reinforcement shall not Be (
less than one-quarters do q
one Cd per cent: OF the area -
the cross section In each dirsction><
Such concrete shall 20;
worked ana ali voids iiiled &.
Exposed top surfaced shall b.
thoroughly cleaned and dampenod.
before adding the next succssdihG
rh ssS :" All ISss ss'SiYsssa s am,
crete construction shall -
sonal and constant super
vision Of competent super
tory to the department OF build
II loading tests are considere1
necessary by the department. %.
buildings the contractor must be'
and at his own expense. to make
tests on a panel or panels AZ may
such tests shall be made aftss.
centering has been remoIed ope'
loaded over Its entire area with,
a uniformly distributed load equal
to twice the superimposed load
for which the structure has been.
designed and under such test the
four-hundredth (1-400) part o.
the span and the member must re-.
turn TO Its normal position after
the removal OF the load. 4
The department OF buildtu40.
may require sworn copies OF testn
on all cements used In any REIN
forced concrete work, such te9la
to have been made by one OF the.
Standard Testing Laboratories
The department. OF buildin01'
may require special tests made of
any carload Of cement or any por-
ton thereof or of any other ma
tertal intended for reinforced con-
crete work. when the departmsns
question the full strength or quail
ity or such cement or other ma
terial All such tests shall -
made at some acceptable STANDARD
Tssns g ss s n ss s tss
or other material to be tested.
cEMENT I IBRIouETTHs. The min
imum requirements for tensile
str, strength for s srC,S.a :n. enc -
For Neat Cement. 81
"a hours I'm moist air, 200 lbe-s
z days tone day In air. six IN
in air, twenty-seven In watsr).
For One CD Part Cement ana
Three (3) Parts Standard Sand
day. day.. Zone day l an, In air 1:n six an =
In air, twenty-seven in watsr)s
ESQ lbs.
ARTICLE XIV.
Concrete Block Construction.
Section I. WHERE ALLOWED.
AND MATERIALS. Concrete builds
ing blocks may be used for build-s
ings four stories or less In height.
where tthe block. are approysd b.
These blocks shall be made OF one
part standard Portland cement to-
not more than three parts OF ciearg
sharp sand and live parts OF gravel,
crushed rock or other suitable ma,
be free from dirt and other foreign,
matter, properly mixed AND manip-
Sec. 2. MAXIMUM PERcENT-
ACE OF HOLLOW SPACE OF
BLOCKS USED FOR DETERRENT s,,
spaces Of any block shall not az
coed the following percentage or
the total cubic contents OF the
block for different heights OF wallis
and In no case shall the th, ha ,ss
than one-quarter OF the height Of
Stories list End. sra. Atm.
! and and Z ssg .ss .s% .ss.
Sec. 9. THICKNESS OF WALLS.
The thickness OF walls for any
building where concrete blocks are
used, shall be the same as that re-
quired for brick walls.
Sec. 4 FACING OF BLOCKS
Where the face of the wall only a
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 Isl
inches into the brick work. every
fourth (4th) course being q hsader
course, or bonded with metal wall
ties, spaced not TO exceed eighteen
ItcN tnrha. In aarh lirerfi0n