The Detroit times., 1911-02-20

routnene4 en1 u31v
ed In the proportion % 80
sand. before any regular ccuc@
poured
the sn work ssD sssi i e ,ss
drawings, the time and the 14<o @
the pouring OF the diHofeu4 GI
umns. girders and floor slaba
Sec. ls. FREEzfNQ WEA1.
permitted when the Temperatures .
81 degrees Fahrenheit or lea uU<
less sufficient precautions are ~
ken 20 prevent the concrete fFo)@
freezing after having been put q
All forms must remain until ~
sprance' IL had that AL frost ~
left the concrete and II has 81
fained Its permanent set ~. =
.o NO frozen zen material ma ria, Or mstsssex
Sec. 20. HOT WEATHER. Cen
crete laid during hot weather nhoU
be thoroughly wet with clean w.
ter twice daily, during the ART
"s The brock broken 's Stone. Stag or gravS.
must be thoroughly wet before place.
Sec. ii. CONCRETE coLu3qS
PROTECTION. The outer she'll a
hoped column or istticed stru&
sidered as a fireproof coyer1u4
only, and must not be included -
determining the safe load.
In fireproofing structuf4I
steel or cast Iron column y1tA
ing OF wire fabric or wire tioD
shall be Embedded In the concrSte
Sec. "a. TILE AND CONCERTS
FLOOR CONSTRUCTION. When
M - q
used for floors. the tile shall bo
form size. ~
The concrete joists shall b.
not less than four (4l inches wida
Should concrete be needed On
the top OF the tile for compress
sive stress II must be poured ~
the same time as the joists and Il
must be OF the same mixture.
The tile should be thorouehly
soaked with water before pouring
the concrete. .iss -
Sec. %. MoNoLIrHIc -wAI1.b
AND PIERS. Monolithfc concroto
walls. constructed in places With
S a reinforcement shall BE H. H.
ordinance for brick walls. and
with steel or iron reinforcemenl
they shall be at least sixty-sx
(66) per cent. OF the thickness re-
QuiTt0 IOT Dfick Wnlls.
Reinforcement shall not b
less than one-quarters Q-N of
one I'd per cent. OF the ares ~
the cross section in each direction
Such concrete shall -
W nSISSdfs aSd all Ys Soids ana il.dp
Exposed top surfaces shall ~
Thoroughly cleaned and darnpened,
before adding the next succeeding
Sec. a. INSPECTION And
crete construction shall b
performed under the per-
sonal and constant super
vision OF q competent super
inteudent.. who shall be satisfec-
; tory to the department. OF build build
II loading tests are considersd
necessary by the department. az
buildings the contractor must b
prepared within a reasonable ti1e
and at his own expense; to make
such tests shall be made after
centering has been removed one
(1) month. Each panel shall bp
a uniformly distributed load equA
to twice the superimposed load
for which the structure has been
designed and under such test the
DETECTION must not exceed one
four-hundredth d-4ool part "a
turn to its normal position after
the removal OF the load.
The department Of buildings
may require sworn copies or tests
forced concrete work. such tests
to have been made by one or the
Standard Testing Laboratories =
The department OF building.
may require special tests made OF
any carload Of cement or any por-
terial intended for reinforced con-
crete work, when the departments
OF buildings shall have reason TO
question the full strength or quail
ity. of such cement or other ma
terial. All such tests shall 3
made at some acceptable Standard
Testing Laboratory. and at the sx-
pense OF the owner OF the cement
or other material TO be tested.
oE ssss 3 BR1o 3 4 E z The a MIA ia
imum /. requirements for tensile
strength FOR brfquetts, one I'd
inch square In section. shall DO a
For Neat Cement.
- hours in moist air. zoo lbs.
days Zone day In air, six In
water). 500 lbs; Is days Zone day
IN air. twenty-seven In water).
600 lbs. e.
Three days fs ens d sssnS IN air sane
watsr). 175 lbs; 2s days Cone day
I'm air. twenty-seven In water3,
ARTICLE XIV.
Concrete Block Consfructf0n.
Section 1. WHERE ALLOWED.
AND MATERIALS. Concrete build
ing blocks may be used for bufld-
ings four stories or less In height.
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
sharp sand and five parts OF gravel.
crushed rock or other suitable ma
terial. The materials used shall
matter. properly mixed and manip-
Sec. 2. MAXIMUM PERCENT
AGE OF HOLLOW SPACE OF
BLOCKS S2GSg UsEp FOR P PIE ha5iST
spaces OF any block shall not en-
coed the following percentages OF
the total cubic contents OF tire
block for different heights of walls
and In no case shall the thickpess
than one-auarter OF the height Of
Stories 1st End. 3rd. 4th.
J AND AND ! sS% ts% ASK ass
Sec. 3. 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 -
20 be OF concrete building blocks
and the backing OF brick. the con-
crete blocks must be strongly bond
ed 20 the brick with concrete or
brick headers. projecting four Cd
inches into the brick work. every
fourth (4th) course being a header
course. or bonded with metal wan
ties, spaced not TO exceed eighteen
1l0 inches in each direction.
Sec. s. MORTAR. All walls
where concrete blocks are used.
ahalI he laid nn I'm Portland ce-