The Detroit times. [volume] (Detroit, Mich.) 1903-1920, 1910-10-05

ssons syss sren dirt - dH6s and
fAe sssvsi shall ~ washed
The slag shall b slsaa srushsd
An AGEEsgats must b Of such
ssinsd SaSs ons-eSsssss txj Inch
Ssc. H. MATERIALS PRoHrs.
TIED The following nnatsriais
ss s: ess 2: SssS N Sass SS Con
platter OF paris. sulphats Of lime
ana all eimilar tn{nrioue mstsviels.
esc. H. CENTERINQ AND
roRMe. All monolithic reinforced
conSrsts shall be built on csntsrs
Ali forms shall be built strong.
oushly bracsd and with tight
Joints. 20 that no apprsciable part
and they shall be supported TO
carry ali Of the usual loads which
may come upon them without
spring or detection.
For columns ;Su nn,,s an op ., shall be
cleaning and adjusting the steel
The opening shall not be closed
until the column 10 to be poured
Columns over fourteen ID feet
inches square, shall have an inter-
pouring started therefrom. The
forms shall be thoroughly cleaned
Immediately before the concrete Is
foreign matters removed.
Before removing the shores un-
oer any beam or gtrder. the column
supporting IL shall be stripped. so
that the column may be examined
II ample shores are used to carry
the full weight OF the Moor. column
forms may be removed AZ soon as
the concrete has set up hard. pro-
vtded that the said forms shall not
be removed within seventy-two (7a)
hours after pouring.
The sides Of girdcr and beam
forms. may be removed at the ex-
piration OF six go days after pour
The time which must eiapse be-
fore removing the shores under the
girders and beams. will vary with
the design and the conditions of
the weather. but in no case shall
tSl weeks after pouring
The supports under Moor slabs
shall not be removed in less time
than ten Ci0) days after pouring.
prevent removing the joists and
tagging within a less time. provfd-
ed the slabs are kept properly
shored up.
Sec; 4 sLAc,Ma on OF , REIN,
members shall be accurately locat-
ed in the forms and secured firmly
against displacement. They shall
have q protection of concrete. not
less than two go inches thick for
inches thick ON the bottom and
= side Of girders and beams and
three-quarters t%) inch on bottom
of floor slabs.
ton shall be clear of the reinforc-
ing members.
Exposed metal centering or ex-
posed metal of any kind. shall not
be considered factor In the
strength Of any part OF any con-
Sec. Is. PLACING OF CON
CRETE All concrete Is to be what
IL known as a wet mixture"
Before pouring concrete. each
ment must be In its proper posi-
ton. and be held there until the
pouring 10 complete.
All concrete shall be placed i'm
mediately after mixing and any
concrete having a partial set be-
fore placing. shall not be used In
any portion OF the work nor be
returned to the mixture.
When concreting IL once started
II shall be carried on as a contin-
nous operation, till the pouring OF
the section or panel is completed.
IL. for any reason the concreting
must be stopped. care must be ia
ken to stop the work at such a
the work Is resumed will not
weaken the member structuraAy.
All columns are TO be stlled
sufficient time ahead Of the door
III 49,
in the columns to properly set up.
The pouring of the column must be
In one continuous operation TO the
level of the bottom OF the gfrdcr
or beam supported by IT,
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 as
to be mono!ithic with the adjacent
from the bottom or the beam TO
the top Of the slab.
When a section of the floor Is
once poured. II shall be left en-
tirely undisturbed until the con-
crete has thoroughly set.
When fresh concrete Joins con-
crete that IL set or partially set.
the exposed surface OF the old con.
crete shall be thoroughly cleaned
and roughened and have applied TO
IL a coating Of cement mortar. mix
ed I'm the proportion of one Cd
part cement to one Cd part
sand. before any regular concrete
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
umns. Orders and floor slabs
Sec. 10. FREEZING Wealth
Err. Concrete work shall not be
permitted when the temperature Is
81 degrees Fahrenheit or less, UNI
less sufficient precautions are Ia
ken to prevent the concrete from
freezing after having been put In
All forms must remain until as
surance Is had that all frost has
left the concrete and 1t has OBJ
tanned Its permanent set
No frozen material or materials
covered with ice shall be used,
Sec. 20. HOT WEATHER Con.
crete laid during hot weather snail
be thoroughly wet with clean wa.
week after placing.
The. broken stone. Stag or gravel
must be thoroughly wet before De,
Sec. 81. CONCRETE COLUMN
, PROTECTION. The outer shell OF
turai steel column. shall be con-
sidered as a freproof covering
only. and must not be included In
I determining the safe load.
) In freproofing a structural
D concrete, a reinforcement consist
ing Of wire fabric or wire ties
2 shall be imbedded in the concrete
eo seer III TILE AND CONCRETE
2 FLOOR CONsTRUCTION. When
8 tile and concrete construction Is
4 used for doors, the tile shall be
5 sound, hard burned tile OF uni
form size.
4 paraIlei and In perfect line and
3 not less than four t4l inches wide
o Should concrete be needed on
/ the top OF the tile for compress
2 sive stress II must be poured al
3 the same time as the toists and II
must be OF the same mixture.
The tile should be thorouRhly