El Paso herald. (El Paso, Tex.) 1901-1931, 1917-04-04
Ell. PASO HERALD

der or Stag concrete may be used only for
when properly reinforced Floor filling o.
solid or hollow burnt clay, bric1 or cShCt { e
| cloth expanded metal. wire strands or
| wrought IRON or steel bars shall have slch
! metal covered with at least two CD inches
Incasine Interior Columns
Section IS All cast-lron- wrought iron o..
rolled steel columns including the Tugs and
brackets on same. used FOR vertical supports
IN the interior OF any flreDroof building or
used 10 support any fireDroof fioor snail De
inebes Of bsrd-burred brickwork terra
Gotta. concrete or other fireDroof material
secu-eiv an3Iied. but no plaster Of paris OF
lime mortar shall be used Tor this PURPOSE.
nor shan any plaster whether or not on
metal lathing. be considered part OF the
No Single block or unit OF Insulating ma
terial used for column covering shall have a
greater vertical dimension than six inches
when placed in position nor shall the
shells and webs Of hollow tile or terra Gotta
land cement mortar. and the said blocks be
suitably tied or anchored together
The extreme outer ecSes OF luKs. nfae5t- :
ana similar supporting metal may project
surface Of the fireproofinE. The fireproof
! covering shall start upon the fireDroof floors
: ceilings or under-side OF the girders above
d and be entirely independent OF any orna-
No DiDes. wires or conduit Of any kind
shall be incased in the fireproofinE sur
steel or iron. but shall be placed outside Of
! Where the foreDroof protection Of columns
IS exposed 10 daInage from The trucking or
.,ann4llI % ii IL i se M ~ g =. O4 y ~ .
the floor with sheet metal. or with vertical
Incasing Exposed. sides and Bottom and Ton
Plates and Flsnges OF Girders
and Beams
Section Sc The exposed sides of wrought
iron or roled-stsel Girders supporting walls.
IRON or steel door beam or supporting
floor arches or floors. shall be entirely en-
Gotta concrete or other fireDrOof material
not less than four inches in thickness and
such girders shall have not less than two
inches in thickness OF such insulating ma
teTiaL Inc bottom ana TOD plates and
flanRes Of all NrOught-irOn OF rolled-steel
floor and roof beams and al exposed Dor
tons OF such beams below the aoutments
OF floor arches Or filling between the floor
beams shall be entirely lneased with hard
other fireprOof material. such incasing ma
terial TO be not less than two inches in
Painting Of Metal structural Work
work come in contact with each other. they
shall be painted before assembling Paint
work which Is TO be thoroughly imbedded
in concrete OF cement grout applied directly
otherwise all such work must be cleaned
Of scales. dust. dirt and rust and thor
suitable paint: after erection all such work
shall he painted A. least one additional
Cd or covered until after inspection by the
Building InspeetoT All iron or steel used
Reinforced Concrete or Concrete-SteeI Con-
structed buildings
Section Il. The term reinforced con-
crete or concrete steel in this section /
shall be understood to mean approved !
concrete mixture Eelnforeed oy steer OF any
shape 50 combined tuaS me steel VIII take !
uD the tensiOnal stresses and assist in the |
Reinforced concrete construction NAV be !
accented Tor fireoroof buildings provided !
rounding the reinforcing members one-ouar- !
ter inch or less IN diameter shall be one !
inch; and for members heavier than one
quarter men the minimum thickness OF pro-
tectinE concrete shall be four diemeters. !
Of other thau circular srs)ss-Section which /
lies in the direction IN which the thickness /.
tecting concrete need De more than two ;
and one-han inches thick FOR bars OF any /.
and Eirders OF reinforced concrete shall have {
at least one inch Of material on all e1- !
for structural PURPOSES. and all beams and I
floor slabs shall have at least three-uuarters !
inch OF such surplus material for fIre-resist- /
ing purposes: but this shall not be con-
strued as increasing the total thickness Of /
protecting concrete as herein specified
All the requirements herein specified for /
poses shall apply to reinforced concrete fill
inR between rolled-steei beams. a. we'll as
to reinforced co1crere beams and to entire
crete structure or the floor fillinE in same.
erected on a permanent fcentering OF sheet
metal or metal IathinE and curved bars !
u a metal ceute-inE OF any other form. must
be strong enough TO carry its loads without J
trom the eentsrinE. unless the
tcring as herein specified for metal REIN
forcement-
Exposed metal centerinE or exposed metal
81 kind Will not be considered a factor
IN the strength Of any part Of any concrete
structure and a plaster finish applied over
the metal shall not be deemed sufficient
All concrete for reinforced concrete con-
s.Tuction whenever used in such buildings.
aust be mixed in machine which mixes
discharges II before another IL introduced
AZ least twenty-five complete revolutions
must be made at sucIl a FaLIf ~ 10 turn J.lc
lcncrste over at least once IN each revolu-
Before PERMISSION 20 erect any concrete
iteei structure Is issued cOmolete drawings
Ind sDecifications shall be flied with the
suiiuinE inspector. showing az ues1l4s %.
he construction. the size anu position OF
~ reinIorelIS roes, st,TIqps' &c, anu
ng tire composition OF the concrete me
.xeeution OF work shall be performed ~
gOrkfneu under the direct supervision OF a
onDcteut foreman or supeiint ellctht
All forms and center1nE Tor concrete
halt oe D1,tl 1lgano - N d So, !
nei.ner with INSIDE surllces sllovlh anu ,
made tight 50 that no PARK % the concrete
racks or holes. and after completion shall
q thoroughly cleaned out removing shaw I
ms. chips. pieces OF wood and other ma
eriai. which should not be permitted IN
ocated in the forms ana secured against
isDlacement while the concrete is being ,
Concrete shall be placed in forms as soon !
: practicable after mixing and IN all cases
ll Immediately after the addition OF water
Whenever fresh concrete IONS concrete
hat IS set. partially set the surface Of
he old concrete shall be rouEhened. cleaned
nd thoroughly slushed with a gr0ut OF
eat cement and water
Concrete shall not b. installed In freezing
leather: such weather shall De- taken 20
Iean a temperature OF thirty-two degrees
ahrenheit or lower. concrete shall not be
lowed TO freeze after being put in place. /
nd. II frozen. shall be removed
The time at which forms and centering
lay safely be removed will vary from
genty-four hours to sixty days. depending
pom temperature and other atmospheric Z
Jnditions Of the weather: the time for such
smoval to be determined by the Building
lspector- 2
The concrete shall be mixed in the Dro- o
ortions Of one OF cement two OF sand and
iur OF other aggregates or the proper [
ons NAV be such that the resistance Of
ie concrete 70 crushing shall not be less II
.an 1900 pounds Der square inch after .
srdening FOR twenty-eight DAYS. but for re- a
forced or plain concrete columns the mix n
ire shall not be leaner than part OF Il
ggreEate IN any case The test to deter
inc this value must be made under the n
rection Of the Building Inspector. The u
ncrete used in coucrete-steel constructions q
ust he what is usually known as wet W
ix-ure.'
The stone used in the concrete shall he o
can. broken stone. OF d size that viii pass a
rough Il three-quarter inch ring. or good ol
avcl. broken hard bricks. terra Gotta fur D.
ice Stag or hard. clean furnace clinkers- w
tirelv free from cOmbust-bie matter. and ri
A similar size NAV he used