The Washington herald., 1909-07-10
CONETTsSTONERsl N0TICE-

be knoEn as Sec s3-A to fcii0T Ser Sc q rhs
present. Building Regulations;
Sec. ga. SPECIFICATION GOVERNING TIE
Use OF REINFORCED CONCRETE
! DEFINITION Reinforced concrete j. a concrete
I IN which stAel = iEabeidsd 81 such a name
that ule two act "a unison 10 resisting stresses
due o. external loaeing.
/ SUPERVISION. Reinforced concrete or cr-u-
biHaton systems n reinforced conorsts vim o-ber
structural material any EyEtem & aat sreh
construction. Enust be Installed under the con
stant supervision q 3 competeut superintendent
whose name shall b. submitted 81 writing 70 the
irspector q Buildings priu 20 installing The urrE
fLANs. Betcre q PERMIT % erect auv rein
iorceo efncete Srucrrre cr any structure contain
ing REINFORCED concrete is issued complete s0eci-
lc2iiOnS and plans shall b. fled win the Tr-resr-
oi Buildings showing the details of ne f.-1s..-.S
Construction. including the kind n reinflrein lars
and sttrrups. their sizes. position and i-r-rufe-
their laps. bends and Goss sections All r--,+s,r-
ify rods shall be clearly sh0En with thrf- Irrrfhs
ured IN the designs as bans shall Be 50 ir-
dicated uPon The pans.
CEMENT All osment shall conform 70 The
Distrct q Columbia spec.hcations for Portland
cement. IN use ~ the time The permit is issled.
II the cement is = q brad ir general rss In tfe
insIrr1 q Columbia anc known % tie Inspector
q BuildinC4 the following tests VII Be- r-,ui--l
iof hneness, per cent. to pass 50 mesh sieve rcr
ce- % PASS ~ mesh sieve for tine q initial SCI
ana ior tersie strength. Deat. 90 the end n q
hours II the cemenr under his test dos nct an
par % be normal FOR the hand O. Il Il is o. q
| brand not wen known 70 the Inspector q Bald
inss iurrher tests VII b. required. Thc tests Il
an cement mus b. MADE not mere than six
months ITlor 20 ~ uss l5ee section 20 h.idin7
/ tons for crmeut
AGGREGATE AND PROPORTIONS. The az
sftsate anaii consist - send and broken rfore
gravel q cindsrs. as hereinafter deserib,s volume
I ior volume The oement shan constltute Dot less
! nan oLeslHlh q tle agsresate, and the sand
Eaali ordinarily b. egasl - % q tie stone or
gravel Tie proportion q the sane 20 lie stone
u Elltdinss. be Faried slightly % eec-rr rcr-
crete = maximum density
/ CONCRETE SAND. All ssud shan be n an
appro'ed quality clean. sharp cars. and sill
cons. ard shall consist = both iarzs ana srnaT
grains and not contain over s.. q slt
/ BROKEN STONE The stone must Be- 4 an
apfroEed gual-,v inca end under and no stone
slaA BE used that eIceeis ! inch IN rs greatest
dlinensou. stone must D. machine broken bi-e
Enolss. tr1D or fu equal free fr1u lCsm dirf q
othr foreign slistauees. and free from az -rreason-
aoe amount ~ stone dust Stone sLau he vel
Wetted ininlediateiy before being ussd
I CRAWL All gaTeI shau b. 7 l1-h aaF un-
( der clean Ard fee fr'm at foreign ssbs.aaces
ANY gravel covered with mud clay. etc. shau
D Immediately rejected. Gravel shan De- ven uette5
Immediately before being used.
CINDER CONCRETE All cinders shau he q an
s7T7oErd quality 4 clean. Weu bur1ed cinders
i7ee ron asa U dust and from particles @ IN
burned ooa- No onder shag be oTer one inch in
aly dimension
REINFORCING STEEL Reirsoroins stssl ssau
nave an ultimate strength ~ l0- irss than F l0
pounds pr square inch. and an elastic Limit Il
a. least 0t of IS ultimate srrsrg-h. S-sel rrin-
iarccrnc1t made frum rs-ra.led .u1s slau not BE-
useL n tet1Tmed bars are Tr1pCse5 t0 he used
cny the ret section 'fhe section er--rrfre z su
rro5ertio1sI q the lreas q such hcrs sfau he
o1lsifezrd C. elective
Before inerEorafing ne rsiuf1zsi-s s.esI g con
uCte. a Eppct must be fled gifh lie In=De--or
x Buildings slowing that che steel has bser testo7
and IS in sc,l-5zncs with these rrrlls-so-.s 20
strength and elastic Euir- This rsror- u1rs- slow
the dates q tests and must bsar the name z -hs
1ersou- am q corporation ty Whom tle tests
we're madH. Tie SIRE - u III reinforced c-1-r-e
Eo-k saaI be bas=6 urou tins report rhi~1 rhsl
BE- c1cczed By the ius7eCo- ~ Buildings ~ ac-
cI-y.
/ Bars showing f1zc-urz when bsuc 70 ne required
shEl-s shall To- be ussd Rourd E1uzrp Ear OF
mechanical bond ban lor oche- mechaHical bo-d
steel o. Etr1c-u1i steel SHAPES o. wires or czn-
hlnltious n rLese seTeral clEssCs 0f steel nav 10
usld iU 7ciuf0r-sIeur- r-1Iited- rtat the rsces-
shy adj csicl Is ara1be fc- GeFeopilC the strength
q TIE sfeci rsirfo-ceneut. Wheru srirr-rs an
necessarT. thcy nay be loose CT r.-itlr afrachsf
provided. thar The stirrurs he 6es;Ened 50 as %
frausfer The slc1r i1crruCl-s 20 --c horizontal
TV1f0rcrulelt in a UaTnCr se-isflc-rTy 70 r1e r.
sIcc-cr q BuldirgN Iur-rlF1 l01se ErirT-ps sh1I-
r-t b. used TIE oo1ne--ian q fucli1ed ruilfo--g
srtrrurs 20 ths horiz0rraI reius1-cerle-t shau -
so designed that az least % n The ultimate
srvncth n the stirus Eay be Transmitted thro--h
. h0-izontal bez-
Al reinforcing stee; shan Be- made f-se y vusut.
tirt. ol. sresse. sole and r1st Sskes before be
ms encased IN oou-tts.
AT steel shan be straight where 80 ca-led f1r
% th= plans o. hrrr accurately 20 the shapes
called t1r TIE uiz-s
WEATHER AND PROTECrIGS or WORK.
NJ WCrk shan ho done in FREEING cr unsrirab,s
i1E The UCrE HE1i1E- f-cEr ard GTcess5rs heat u
s--rln-er- where The cl-gre Is e-pcsel - he Eur
Il snail be Egpr WeC- and il The WtntaT rhe WurE
mus D. pTuJeC-ed from ne fr1st-
FORMS. All forms and supports - f5-nsl
must Dc strong and sti1 tire. Cr1r of wiuf u-zc-
rczlly unselding an1 suiciently rizht % hold TIE
iIuid mo-a- without leakacs ard her inte-i1r
diue-si1-s nust conform % tie dinaasszs .
ne c1n1Tste sections Shown -pcn he approved
plans Ilc laEErIE n al forms uleu iuuhlr llr-
Eirg IS used. shall b. = q good quality z lr1be-
tressed 20 matched E1eS This lr-uber uust D.
drgssed On Two edges
AL forms tand scpPrr,s fa- farns r-us. receirs
re apTruTal < the Iuspector q B1ildinrs hrfors
the concrete IS placed Wl-hia then Ths C0ncTprs
shal b. plaoed socn possible after the fo-rus
are creCed A1d appruTed- F1rus hat AZ srv
time. bsc,rle twisted wa-pe6 shaIl Be rs-n.7e6
C. correctly adjusted before oon1ets is placrd
Al forms l,nd supports f,- FORMS mrs, b de-
signed % safely car-y the weigh: a the forms
the hlcid cu1cs.e assumed % weight 80 pCrnls
~ clocc food E1d lve Lad u addition thereto
over The foor slab ara q . pounds per scuare
foot. and they nuSt be dssisned - safely with
stand Wind pressure ~ 81 pounds Der square
foot upcn al EurfGoes exposed 20 the Wlrd The
unit stresses IN The forms and supports shal nos
exceed the allowable stress. elsewhere established
!n these rellsti0ns for various building mstc-als
forms sre 20 he hung from steel bans the
hangers snd the method = hanging the forms shau
BE- 2ihiec; 20 The 2pproFsl q the Inspecto- q
Buildings. ard no hanEcs that arC difficult TO
remove shan bc use3.
Tie forms fer beams and EirIsrs and li--sls shsn
b. 50 designed That A. leaS- oCe SIDE cf each
beam and Erier may be removed without disturb
ing tAs bottom p-Tlrs- q the forms and is SUP
pCr-s- Al QoS-s supporting forms f1r slabs hams
and girisrs must rsst upon wedges Whicl may De-
loosed and removed without producing undue strains
IN the ho5r Systsm-
Posts which are 20 Be supported b the ground
must have their loads distributed by s--ead foot
inTz 81 that there may be no a11recizb,s ssttia-
uent q the posts tus 10 settiemeut q rhcir foun-
datt0ns.
BuildinE paper wiz not Be SLOWED n forms so-
any purpose Whatsoever.
column f0-m until c1acsting Is begun r. IT, and
It's open see shah be laEged up as the cor-sting
rrusresses. bit the TOP q this lsgvng shall in 10
case Be nore than three - fseS above TIE lsTsl
Of the column concrete.
In the cass q columns q circular cToss section.
the phrase. "one SIDE opSn" shah bo taken %
moan that. m horizontal cuss section N least
IS q the perineter q the cr0llar form shan D.
Open.
All shavings chips sawiust and other fa-ylrn
matter shall b removed from within the forms BE-
fore c0nCTete is placed therein-
CONCRETTNG- All concrete fcr reinforced c-r-
crete shall Be wee miz. blt rot satEci-rtlv wet
70 separate che cement from the aggrpeate. The
concrste shah b mixed until al TIE Ingredients
have become Thoroughly iEc1rro-atCd snd each pct-
be o. stone IS thoroughly coated with mo-rar
The concrete sbau be p'aced ir1melisteiy after
mixing. ard no concrete that has attained its initial
set can b. ussd, but must be- Immediately hauled
from The Wor- The concrete shall he wen worked
in around The steel and be tanped ard spaded
IN e1-h r1arrer ae n eliminate an r--esbi';f- ~