The Detroit times., 1910-10-05

"a, sroNr. GRAVEL OR eLA0
The stone Skali Be- olsan crvenSq
stone, tres fren art or aust 49,
''; Tss sssssi sA.ii ,. washed
The .lss shsn b clean crushed
All All sSsrsSsts must be Of such
siss a. wan pass through z are
quarter ~ Inch screen ana % re-
tainsd on . ons-0uarssr '*' 'Aea
s's Sec H. MATERIALS PRoHI1-
TIED The foiiowing materials
shail not be used In rsinforced oon-
crete construction; Boiler cin9cre
plaster OF paris. sulphate OF ume
and all similar tnturicS, msssl 1HS
~. Sec; is CT. cE GN,I,Sic ESsinforco3
concrete shall be built on esnssrs
All forms shall be built strong.
unyielding, plumb and true. thor.
oushly 6raced and with tight
joints. so that no appreciate psrt
carry ali Of the usual loads which
may come upon them without
spring or detection.
For columns an opening snail Dc
left at the bottom OF the form. tor
cleaning and s Sd,Tis' nnt be sss closed
until the column 10 TO be poured
Columns over fourteen (lO test
in height. and under eighteen tlS)
inches square, shall have an inter
mediate opening or pocket ana the
Forms Shall be thoroughly cleaned
Immediately before the concrete 10
poured, and all chips. Ice and other
foreign matters removed.
Before removing the shores un-
der any beam or girder. the column
that the column may be examined
IL ample shores are used TO carry
the full weight OF the floor. column
forms may be removed a. soon -
the concrets has Get up hard, pro.
be removed within ssventy-two (1O
hours after pouring.
The sides OF girder and beam
forms. may be removed at the ex-
piration Of six 90 days after pour
inE,. I'm. which mus, .,an.s es.
fore removing the shores under the
girders and beams. Will vary with
the design and the conditione OF
the weather. but In no case shall
they be removed In less than three
ca weeks after pouring -.
shall not be removed In less time
than ten l10) days after pouring.
but this clause IL not intended TO
prevent removing the 1oists and
tagging within q less time. provfd-
ed the slabs are kept properly
Sec IL PLACING OF REIN
FORCEMENTS. All reinforcing
members shall be accurately locat-
ed In the forms and secured nrmly
against displacement They shall
less nass than two esS inches thick for
columns. one and one-half an
inches thick on the bottom and
side Of girders and beams and
three-auarters (k) inch on bottom
The amount of concrete protsc-
ton shall be clear OF the reinforc-
Exposed metal centering or ex-
posed metal OF any kind. shall not
be considered q factor In the
strength of any part OF any con-
Sec Sec is. PLACING OF CON-
CRETE. All concrete Is to be what
IL known a. q wet mixture"
Before pouring concrets. each
ton. and be held there until the
All concrete shall be placed i'm
mediately after mixing and any
sors p pos' BE- used IN
returned to the mixture.
When concreting 10 once started
II shall be carried on a. . contfn-
uous operation. till the pouring OF
the section or panel 10 completed.
II. for any reason the concreting
~ 40
ken to stop the work at such Q
point that the joint formed when
the work Ii resumed VIII not
weaken the member structurally.
All columns are TO be hlled
sufficient time ahead Of the floor
construction, to allow the concrete
In the columns to properly set up.
The pouring Of the colump must be
In one continuous operation TO the
level of the bottom Of the girder
or beam supported by II.
Is to be kept well stirred or pud-
died with a long pole or lamp to
prevent voids and honey combing.
All beams shall be poured so AZ
to be monolithic with the adjacent
from the bottom of the beam to
the top Of the slab.
When a section Of the floor n
once poured. II shall be left en-
tireiy undisturbed until the con-
crete has thoroughly set.
When fresh concrete Joins con-
crete that Is set or partially set.
the exposed surface or the old con-
crete shall be thoroughly cleaned
and roughened and have applied to
II q coating Of cement mortar. mix
ed in the proportion Of one (1l
sand. before any regular concrete
IN poured
The superintendent In charge OF
the work shall mark In ink on the
drawings, the time and the date OF
the pouring OF the different col
Sec 10. FREEZING Wealth
Err. Concrete work shall not be
permitted when the temperature IL
50 degrees Fahrenheit or less. I'M
less sufficient precautions are Ia
ken to prevent the concrete from
All forms must remain until as
surance IL had that all frost has
left the concrete and II has OBJ
tanned its permanent set.
covered with Ice shall be used.
Sec. 20. HOT WEATHER. Con.
crete laid during hot weather shall
be thoroughly wet with clean wa
ter twice daily, during the nrst
week AFTER Placing. :.
The broken stone. Stag or gravei
must be thoroughly wet before be-
Sec. 81. CONCRETE COLUMN
PROJECTION. The outer shell OF
q hoped column or latticed struc-
tural steel column. shall be con-
adhered as q freproof covering
determining the safe load.
In fireproofing structural
steel or cast iron column with
concrete. a reinforcement consist
ing OF wire fabric or wire ties
shall be imbedded In the concrete
Sec. ~. TILE AND CONCRETE
FLOOR CONSTRUCTION. When
tile and concrete construction 10
used for floors, the tile shall be
sound. hard-burned tile Of uni
form size.
The concrete 1oists shall be
parallel and In perfect line and
not less than four az inches wide.
Should concrete be needed on
the top of the tile for compress
sive stress Il must be poured ct