The Washington herald., 1909-07-12
COMMISSIONERS NOTICE.

tNE 4tlAllALA kNEUaLlNLr tN me AA-lf.EL nI 10
lunbia he. and the same are hereby amended 2.
the addition fhersto q the following rrguafcn, d
te kn0rn as See S-A. 10 fellow Sec. g. u ta'
present Buildirg Resulstcrs.
Sec. s-A- SPECIFICATION GOVERNING THE
USE or REINFORCED CONCRETE
DEFINITION. Reirfoced coaeie.e Is a corcTe-,
IN Whica seel IS imbeddsd ~ slch manre
taat fhc two act ig unison 81 resisting stresse
due . external icadfng
SUPERVISION. Reinforced oorr7rte or onm
oinatiou systems q reinforced concrete with othg
stri--ural mateF4al 0r any system q fat srct
Construction. must he installed undcs the cen
'iant s1pTrFisi0u cf competent superintendent
Ehose mare shal be submitted IN writing % thS
lispeetcr of Buildings Urscr 70 installing the work
ELANS Before a rCrnif % erect any rein
iorcel crlcrete structure any structure contain
ng reinforced concrete Is issued complete speci
ic1tous md plans shan BE- flcd with the Insuecci
m kuldinss showing the details q the ur1u0ssd
Construction. iucuding the kind q reinforcing hars
ana stifr1ps. their sizes position AID number
heir lars bends and cross sections Au c1ufinu-
ity rocs shall he clearly shown. with mex leng-hs
and dimensions. Al beans utick hsre been 50
urcd N toe design as 7 beams shall be 90 IN
'iicated upon the plans.
CEMENT. Al cement shall conform 20 Tbs
District q Columbia spccihcatious f1r Portland
cement. m use at the time the permit Is issued
~ the cement Is n brand IN general use in the
District q Columbia and known % the Inspected
ot Buildings, The following tests VII D. REQUIRED
Tor huencss. Der cert. % pass 50 uesh sieve. -,
cent 70 pass 100 mesh sieve. for tss 4 initial s.,
and for tensile strength. neat. a. the end n .,
hours Il the csmelt under this test dos uot an
pear q be normal fcr the hrand OF Il i is 81 !
brand not vel known 70 the InEpect0F a Build
asss further tests wiz be required The tesfs II
AT cement must b. made not more than siz
months IrlOr 20 IS use See section 20 building
regulations. for the District q Columbia specfaca-
/ tions Tor csmentl
AGGREGATE AND PROPORTIONS. The A.
gTegate shall consist n sand and broken sore
gravel OF cindsz. a. hereinafter descrbed Votlroe
for volume. the cement shan Constitute rot less
than ons-sEth q the aggregate. and The sand
shall ordinarily be equal % 50E q fhe ssope q
gravel ne prUpcrti0n y ths sane % the stons
or gravel nay, With the consent q the Tnsuer4o-
ot Buildmgs, b. FIred slightly - secrrB con
crete q ua1inum density
CONChEIE SAND. All sand shah - q &C
approved quality. clean. sharp cnarss. and sli
Gus. and shall consist n both ssrgs and snsT
grains and not contain over 81 Of SIT.
BROKEN STONE. The stone must D. q a.
sppr1Ted quality ] inch and under. anS 10 stopr
shan b used that ezeeeds J inch IN IL Sreares,
dimension stone must - machine h-oken hlus
guelss trap. O. its equal f-es fron Iosm. dit o.
ether foreign substances. and free fror an unrssson
abe amount z stone dust Stone shau BE- Ezl
Wetted Immediately before being ussd
GRAVEL. All E17el shan be ! ireh snd 10
der. clean and free frum all fc-eiFn s-hs,acces.
Any g-HTel covered with mud clay etc. shaU
be Immediately rejected Gravel shall - vel usttad
illlle'llaT@iF peicre beng usfo.
ClADkA CONCRETE. an cinderS shaI b d a.
approved quality q c,es1. vel burned cinders
free ron ash o. dust and from particles q un-
burned cal No cnder sban be oFsr one inch IN
aIy dimension.
REINFORCING sTEEI. Rei-fo~rf-s -.eol -b,r
have an ultimate strength q net lass than s co.
pounds pc- SQUARE inch. and An e-astis hu.it q,
st least 0L q rs ultimate E,rsn1-h Steel rein
fcrcemcnt made from re-rolled rails SAL not b
used II oef0rned hEz are proDosed % Be- used
aaHas ~
proieetsoOs q tie areas q slch hzn khau bs
Considered Is Elective.
Before tnoorporztins TIRE reinforcing steel IN on
crete q rpcr must be fled wiih the Insnecto,
q Buiidngs sh0Ting that the steel has ben tsztst
and Is in accor1acca With rhese rgEulations fc-
strength and elss-ic Int. This rgpo-r MS sh0v
the dates q ,ssts and m1s. bar tie name o. th'
persoE, nrra or coFporatio1 y whom the tes-i
were made. he strength q az reiufo-ced c1ucretl
work shal - based upon this report vh.ch shai
b. checked by tie Inspec1U q Buildings for &C
curscv.
Bars showing fractures vhen bent 70 ths resuireC
shapes shall nct b Used Round scuare hat d
uechsaieal bond he-1 lcr other mech a-iosl boz
steen CT structural steel shapes or wires o. con
olrsrous n these scTC-ll classes q steel Hay b
used Tor rsiuforcemelr- rr1siied- tha. the nrces
say adhesion s. available for CereIoriuE the strsal
of he stsel reinfo-cement. Whe-e s,irgps an
necessa-y, they may b loose cr risi6ly sttsohsi
I provided, that The sttrruls he ccEEurd 50 as q
trance ths shear inc-sueuts 90 re ho-izouta
I
reirforcemrut fn manner satisfactory 20 the II
spsecscr II BuldirEz Inclined lrcss sti7r17s shal
net BE- rzsd. The connection q inclined TrEf0rciu
stirr1ps 20 The korizontal reiuforcrmelt shall B
- desinsd that a. least ~ q The uitiulat
strength a The sfirrups uzy q Transmitted throl
I the metallic ccn1ecyioa & The s,irT-Vs 10 q
/ korirontai harS.
Al reinforcing steel sAafi Be made me of paint
| dirt oil. grcase. scale aud rus- 1akes b1cre be
I ing encased In coucTete-
All steel shall b. sfrsisht WhsTe called %
on ths pans or sent accurately % the shape
| called for On The plans
WEATHER AND PROTECTION OF WORK
No work shah be done IN f-eeziug O. unsUitabl
weather and care shaL be exercised A. prcte7l
/ ins the Wcrk against frost and eIcazSre heat i
sumner. where the concrete IS sTposed % ths SUI
4 shah Be keT- weS. and n the winter the Wor
must be protected from the frost.
FORMS All forms tand supports Tor ferns
uust be strong and stif. true 0ut q Wind. prr
I hc1ly uuJieldirg and su-1cenriy tight % hold d
I liquid mortar without leEkIEs- ard their infeTic
dimensions mrst cuuforu % ths di1ersio1s O
I ths concete seciuus shown uDon rhs spproEe
plans. TIE lassing q al forms. When lumber Ia
Eing is used. shall b. q good ousii-y q hunbe
dressed n matched sizss This lunlber must b
dressed On two edges
l All forms laud supports f-r foruasl rust reoelv
I the sppruval = RE iuspeco- Of Buildings bef1r
/ fhs coucrsts Is plaeed wlthin thcn- ne oo1cvt
shaI be PLACED soCa ~ possihle sfteT the form
D are erUcted and app-0ved Ferns hat. st &C
| time, become tWis;ed o. warped san - UncTe
{ of eorre-Iy adjusted before sol=ste IS place
glthlz them.
/ AT forms land supports Tor fo-msl nus, be d.
( signed % safely carr lie weight Z the FERN.
I the liquid coac=ets la-sgmed % weiEat 80 pouud
pcr cubo fool and I've load n addition thereto
Z over the flor Sab ara n q pounds per s1us-
/ foot. and they must b. designed 20 safeiy VIII
stand a wind UTess1Te Of % poCDds Der sluaT
/ f0or upon al surfaces exposed % the Wind II
mix stresses n fhe forms and suprorts shall nc
exceed the aiicvsble stresses elsevhere estsbiste
l IN these res-iatrIs fox YaTlCus buidIuE EraIeTiah
/ II forms are 70 b. hung frum steri heamS th
/ hangers and The method q halgnz the forms Eha
/ b. slbject % the Gppr0val n the IUspec-cr
/ BuHdings. and 10 hangers that are ci1cUlt Z
| remove shall b. used.
I The ferns fo- beEms ard girders ard Iinte,s sha
| be 50 designed that a. least CEs side x eac
l heam and grder nav he removed without dsru-i
l ing The eotSoIn PORTION q the furES and its SUI
/ ports. AZ Qosrs supporting forms for slahs. bean
l0ossd and removed without pro1ucing undue stFair
/ IN the dO1r system
Pests which arv % Be supported by the groun
must have Their loads distributed b slruad foo
I iuEs. that there na~ b no apu7eCiable Ssttl'
nent q the posts due 70 settlement of thclr four
da1ions
I s.-a4ing Dspe- win not Be allowed in forms fg
I auv purpose WhatsceTeT
All columns must have one side open a esc
column form until cunc7gting is begun ia IL. an
its open si3s shall be lazsed Up as the ooocetin
prugresses but the TOP of this laggiug shall IN q
Z case b. mors than thrre t3 feet above the ieT'
| Of he column cUnCgte
/ n TIE case q counns q circular cross sector
/ the phrase 'cne side open shah be taken
mean that IN horizontal cross section a. Ieas
is q the perinetef q the circular form shah
I opSn.
/ AL sharirgs. chips. sawdusr and other focSig
matter shah be removed nom within the forms b
fore concrete is PLACED therein
CDNCHETING. AL concrete i1r reinforced ccI
crete shall be 4 uet nix. but not su8ce1tly N
70 sepaute the cement from the agg-eEate- II
I concrste shall - mixed until 81 tae ingredien1
have bccCne thoroughly icc0rr1ruIed and each pei
/ BE or stone IS thoroughly coated with uTts
/ The cuucrete sbau be PLACED mmsdiafeiy aft'
uixinr and 10 corcTcte that has attained rs init
/ set can BE- used tut must o. iumeiiately hEuie
g., - -, TTs r1rrrara eheU - y~eT y-sl-Ja