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8/2/2019 Stell Bars Sizes in the Phil. and Canada Compred
1/13
[BARLINESMANUALOFSTANDARDPRACTICE(PHILS)] BRE100
1 BarlinesReinforcingSteelCo.,Inc.
ChapterOne
METRIC(SI),PNSBARSIZESSTANDARDSANDOTHERCRITERION
ByAmadeus(Mady)Magpile,PresidentandCEO
INTRODUCTION
ThisisfirstinaseriesofarticlesoutliningtheManualofStandardPractice,Estimatorsand
DetailersofBarlinesadheretoregardingReinforcingSteelinthePhilippines. Becausethe
currentpracticeinthePhilippinesisstillpredominantlycutandbendatthejobsitethe
practiceofrebarestimating,detailing,fabricationandeveninstallationvariesfromjobtojob.
AndalsosincethePhilippinesisjustnowgettingfamiliarwiththetypicalfabshopequipment,in
generalnotesandspecificationstoprovidequalitycontrolareattimesconflicting. Insteadof
leavingeveryone
to
their
own
interpretations,
Barlines
took
upon
itself
to
layout
abasis
for
a
ManualofStandardPracticethateveryonecouldembrace.
BecausetheauthorwasandstillisamemberoftheCRSICommitteeonReinforcingBar
DetailingandthatBarlinesmothercompanyhasdoneworkinmanycountriesoftheworldand
havelearnedtoadapttosomanyrebarengineeringstandards,thetaskseemeasierassignedto
them. Barlineswelcomeanyconstructivecommentsonthisendeavor.
1.01 -METRICvs.IMPERIAL
IntheInternationalSystemofMeasurement(SI),theMetricSystem,alldimensionsin
ReinforcingSteelPlacingDrawingsshallbeshowninmillimeters,thus: 365,625,720,9000.
Somemayshowaspacebetweenthousandsandhundreds,butsuchisnotmandatory. By
adoptingthisstandardtheuseofmmabbreviationsbecomesunnecessary. Spacingofbars,
dimensionsandlengthsofbarsshallalsobeshowninmillimeters. Tofollowthepracticeinthe
UnitedStatesandtoconformtocalibrationoffabricatingequipments,rebardimensionsshallbe
roundedtothenearestinchor25mmforendhooksandtothenearestquarterinchor5mmfor
stirrupandtiehooks. Theseincrementsalsoarecompatibletotolerancesinfabricationandbar
placement.
ThePhilippineNationalStandard(PNS)barsizesarenotuniversal. Itisworthcomparingthe
barsizes
to
have
agrasp
of
its
effect
on
standard
hooks.
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[BARLINESMANUALOFSTANDARDPRACTICE(PHILS)] BRE100
2 BarlinesReinforcingSteelCo.,Inc.
TableBRE100.01
BARSIZECOMPARISON
Philippines Canada,Intl UnitedSates
BarSize
Area,
Sq.
mm.
Bar
Size
Area,
Sq.
mm.
Bar
Size
Area,
Sq.
mm.
#3/10m 71
10m 78.5
10m 100
12m 113.1
15m 200 #4/13m 129
#5/16m 199
16m 201.1
#6/19m 284
20m 300
20m 314.2
#7/22m 387
25m 490.9
25m 500
#8/25m 510
28m 615.8
#9/29m 645
30m 700
32m 804.3
#10/32m
819
35m 1000
#11/36m 1006
36m 1017.9
40m 1256.6
#14/43m 1452
45m 1500
50m 1963.5
55m 2500
#18/57m 2581
Youwillnoteintheabovebarsizecomparisontable,10m,16mand36mofthePhilippinesarea
bitlargerthanbarsizesoftheUnitedStates. Itfollows,thatexceptforthesebarsizes,all
standardhooksrequiredbytheAmericanConcreteInstitute(ACI)fortheU.S.barsizescanbe
maintainedinthePhilippineswithveryminoradjustments.
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[BARLINESMANUALOFSTANDARDPRACTICE(PHILS)] BRE100
3 BarlinesReinforcingSteelCo.,Inc.
1.02 -AVAILABLESTOCKLENGTHS
UniqueinthePhilippines,barsareavailableinmultiplestocklengths. Becauseoftheabsenceof
fabricatingequipments,theMillstookuponthemselvestomakeavailablevariouslengthsto
reducethe
amount
shearing
that
will
be
needed
in
acut
and
bend
practice
at
the
jobsite.
BarsinthePhilippinesareavailablein:6.00,7.50,9.00,10.50,and12.00meters. Onaspecial
order,15.00meterscanbemadeavailable.
1.03 - STANDARDHOOKS
Toavoidhairlinecracksinducebyexcessivebendingstresses, theACIestablished controlsby
specifyingtheminimuminsideradiusorinsidediameterofbendthatcanbemadeforeachsize
ofbar. Thisminimumbenddiameteriscommonlyknowinfabricationisasthepindiameter.
Theradiusofdiameterofthebendisusuallyexpressedasamultipleofthenominaldiameterof
the
bard
b.
The
ratio
of
diameter
of
bend
to
diameter
of
bar
is
not
a
constant
because
it
has
beenfoundbytestthatthisratiomustbelargerasthebarsizeincreases. Theminimumpin
diametersofbendspecifiedbyACI318(318M)forreinforcingbarsareasfollows:
BarSizes(mm)
Otherthan
Ties/Stirrups TiesOrStirrups
8m 6db 4db10m,
12m,
16m 6db 4db
20m,25m 6db 6db28m,32m,36m 8db
40m,50m 10dbdb=nominalbardiameter
Besidesthe
requirements
of
ACI
318,
the
rounding
of
end
hooks
to
the
nearest
25
mm
and
stirrupandtiestothenearest5mmallowanceforspringbackinfabricationandmaintaininga
policyofproductionfabricationpinsizenosmallerthantheASTMA615/A615Mbendtestpin
sizewereallrecognizedaswell. IntheTables,theextralengthofbarallowedforhookis
designatedasAorG. TheAandGforhooksmadeitpossibleforsoftwaredevelopersto
programthemassuch. Forexample,aBarlinesDetailer,usingadetailingsoftwareonlyneedto
entertheplus(+)orminus()keytorecallastandardhookdimensionsforanysizebarattheA
8/2/2019 Stell Bars Sizes in the Phil. and Canada Compred
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[BARLINESMANUALOFSTANDARDPRACTICE(PHILS)] BRE100
4 BarlinesReinforcingSteelCo.,Inc.
orGcells. UsingMicrosoftEXCELspreadsheet,onecanembedalookuptableatthosesame
cells,eliminatingmemorizingallthedifferenthookdimensions. Asanaddedrule,theAorG
canalsobeadimensionlessbutnotmorethanstandards(SeeTableoftheminimumAorG
Dimension).
FabricatingequipmentmostlikelywillbecomingfromtheUnitedStates,ChinaorKorea.
BarlinesequipmentisallfromKRBMachineryofPennsylvania,U.S.A., andthesameequipment
thatfabricatedthePETRONASTowersinMalaysia.
1.04FABRICATINGEQUIPMENTCOMMONLYFOUNDINAFABSHOP
HerearesomephotosofBarlinesFabricatingEquipmentfromKRB.
TheKRBShearline,withtheloadingtableattherightsideoftheshearhead,themeasuring
conveyorandthesortingtableontheleftsideoftheshearhead. Inthisinstance,themultiple
barshavebeenblocked(blockercalibratedevery5mm)andshearedoff. Atthepushofa
buttonbytheoperator,thebarswillbeliftedandslidintotheopenbinno.2,whilebinno.1is
closedwithbarsofdifferentlengthorsizethanontheconveyor.
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[BARLINESMANUALOFSTANDARDPRACTICE(PHILS)] BRE100
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BelowistheKRBHeavybender. Noticethepinsizearoundwhichthebarwasbent. Noticealso
theextralengthattheendrequiredbythepintocatch. Shorterthanstandardmaymakeit
impossibletobendthebar.
BelowisaphotoofBarlinesGreenElephantKRBStirrupmatic. Itiscapableofshearingand
bendingmultiplestirrup/tiesbothinstraightrodsandincoiledrebar,inbarsizes10m,13mand
16m,inoneoperation. WhilecoilisstillnotreadilyavailableinthePhilippines,Barlinesisable
togetthemfromTaiwan. WithCoilsrebarwasteisreducefromoneremnantevery12meter
stockto1remnantevery3000meterstock. Againthismachineiscalibratedinincrementsof5
mm.
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[BARLINESMANUALOFSTANDARDPRACTICE(PHILS)] BRE100
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TableBRE100.02
THEPHILIPPINESMETRICREINFORCINGBARS
NOMINALDIMENSIONS
BARSIZE
Designation
AREA
SquareMillimeter
MASS
KilogramperMeter
DIAMETER
Millimeter
#8 50.3 0.394 8
#10 78.5 0.616 10
#12 113.1 0.888 12
#16
201.1
1.578
16
#20 314.2 2.466 20
#25 490.9 3.853 25
#28 615.8 4.834 28
#32 804.3 6.313 32
#36 1017.9 7.990 36
#40
1256.6
9.865
40
#50 1963.5 15.413 50
ThereinforcingsteelshownaboveareavailableaccordingtoPNSGrade230(ASTMGrade33)
fromsize#8to#36;PNSGrade275(ASTNGrade40)fromsize#10to#36;andPNSGrade415
(ASTMGrade60)fromsize#10to#50. PNSGrade415alsoisavailablemarkedwithWwhich
denoteswieldableproperty.
BarlinesRebarDetailersandEstimatorshallbemindfulofthePNSGradesandWeldability
requirementsofreinforcingsteel. BarlinesassumesthatwieldablegradesconformstoASTM
A706,Grade60bars,whichisLowAlloySteel,requiredforbarsthatareweldedandonDuctile
FrameorBoundaryElementsofShearWallsinSeismicZone4,suchastheentirePhilippines.
Itisnot,however,theresponsibilityofaRebarDetailertochangethegradesofrebaras
specifiedbytheDesignEngineer.
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[BARLINESMANUALOFSTANDARDPRACTICE(PHILS)] BRE100
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BarlinesRebarDetailersshalldetailstandardhooksonbarsaccordingtotheseminimum:
ACI318(318M)minimumbenddiameters, Roundingto5mmand25mmincrements, Springbackinfabrication,and FabricatingEquipmentcalibration.
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TableBRE100.03
RECOMMENDEDENDHOOKS,AllGrades
D=FinishedbendDiameter(PinDiameter)
180degreehook
90degree
hook
BarSize
D*
(mm)
AorG
(mm)
J
(mm) AorG(mm)
#8 50 100 65 125
#10 60 150 80 150
#12 80 175 105 200
#16 100 200 130 250
#20 135 250 180 375
#25 155 275 205 425
#28 240 375 300 475
#32 275 425 335 550
#36 305 475 375 625
#40 400 675 500 725
#50 500 850 600 900
*Finishedbenddiametersincludespringbackeffectwhenbarsstraightenoutslightly
afterbeingbentandareslightlylargerthanminimumbenddiametersinACIChapter3,
Section7.2.
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9 BarlinesReinforcingSteelCo.,Inc.
TableA100.04
STIRRUPANDTIEHOOKDIMENSIONS(AllGrades)
Bar
Size D*(mm)
90degree
hook 135degreehook
HookA0rG
(mm) HookAorG(mm)
HApprox
(mm)
10 40 105 105 65
12 50 115 115 80
16 65 155 140 95
20 120 355 230 135
25
155
410
270
155
135DEGREESEISMICSTIRRUP/TIEHOOKDIMENSIONS
(AllGrades)
Bar
Size D*(mm) 135degreehook
HookAorG
(mm) HApprox(mm)
10 40 110 80
12 50 115 80
16 65 140 95
20 120 230 135
25 155 270 155
*SamenoteasintableA100.03
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1.05 - OTHERDETAILINGCRITERION
1.05.01 RADIALPREFABRICATION(BendType9)
Whenreinforcingbarsareusedaroundacurvedsurfaces,suchasdomesortanksandwhenno
specialrequirementisestablishedinthecontract,suchbarsshallbedetailedandprefabricated
inaccordancewiththecriteriaestablishedinthefollowingtable.
TABLEA100.05
Barsaretobefabricatedwhen
Bar eithertheradiusorbarlengthis
Size lessthetabulatedvalue
Radius(meter) BarLength(meter)
#10 1.50 3.00
#12 3.00 3.00
#16
4.50
3.00
#20 12.00 3.00
#25 18.00 9.00
#28 27.00 9.00
#32 33.00 9.00
#36 33.00 18.00
#40 54.00 18.00
#50 90.00 18.00
Barswill
be
furnished
straight
for
all
other
conditions.
The
straight
bars
will
then
have
to
be
sprunginplacetofit. Radiallyprefabricatedbarsofanysizetendtorelaxtheradiusoriginally
prefabricatedasaresultoftimeandnormalhandling. Thelastfewmillimetersinvolvedinthe
lapspliceareaoftenappearsasatangentratherthananarcduetolimitationsofstandard
bendingequipment.
Thepresenceofthetangentendmaynotcauseanyproblemonmostbarssincetheyare
generallylapspliced. However,forsizes#40and#50barscannotbelapsplicedandareusually
splicedusingamechanicalspliceorsplicedbybuttwelding. Itisaproblemtoplacearadially
bentbarwhenusingmechanicalspliceduetothetangentendsonbarsbenttoasmallradii. To
avoidthisproblem,all#40and#50barsbenttoaradiusof6100mmorlessshallbedetailed
andfurnishedwithanadditional450mmaddedtoeachend. Barsbenttoradiigreaterthan
6100mmwillbedetailedandfurnishedtothedetailedlengthwithnoconsiderationsgivento
thetangentend.
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1.05.02 LOADINGLIMITS
TableA100.06
MAXIMUMARCLENGTHFORSHIPPING
Radius
Max
length
Radius
Max
Length
Radius
Max
Length
Radius
Max
Length
1219 6172 4115 9016 7010 11506 9906 13563
1372 6224 4267 9168 7162 11634 10058 13664
1524 6272 4419 9320 7315 11759 10210 13767
1676 6400 4572 9448 7467 11862 10363 13868
1829 6553 4724 9601 7620 11987 10515 13968
1981 6730 4877 9729 7772 12091 10667 14072
2133 6909 5029 9881 7924 12191 10820 14173
2286 7086 5181 10006 8077 12319 10972 14249
2438 7263 5334 10134 8229 12420 11125 14349
2591
7415
5486
10
286
8382
12
521
11
277
14
453
2743 7595 5639 10415 8534 12649 11429 14529
2895 7772 5791 10539 8686 12749 11582 14630
3048 7924 5943 10667 8839 12853 11734 14730
3200 8101 6096 10795 8991 12953 11887 14806
3353 8254 6248 10920 9144 13054 12039 14910
3505 8406 6400 11048 9296 13158 12191 15000
3657 8558 6553 11149 9448 13258 12344 15000
3810 8711 6705 11277 9601 13359 12496 15000
3962 8863 6858 11405 9753 13462 12649 15000
TotalLengthover12000mm.
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TableA100.07
MAXIMUMRIGHTANGLELEGFORSHIPPING
SHORTER
MAX
LONGER SHORTER
MAX
LONGER SHORTER
MAX
LONGER
LEG
LEG
LEG
LEG
LEG
LEG
2285 10645 2590 4420 2895 3505
2310 8765 2615 4290 2920 3455
2340 7645 2645 4190 2950 3430
2360 6910 2665 4090 2970 3375
2390 6350 2690 3990 3000 3355
2415 5920 2720 3910 3025 3300
2440 5590 2745 3835 3050 3280
2460 5310 2770 3790 3070 3250
2490 5055 2795 3710 3100 3225
2515
4875
2820
3660
3125
3175
2540 4700 2845 3605 3150 3150
2565 4545 2870 3555
TotalLengthover12000mm.
TablesA100.06shows,forvariousradiiofbending,themaximumlengthofreinforcingbarthat
willnotexceed2235mm. TableA100.07shows,forLshapedbars,therightangledimension
fromtheapextoastraightlinebetweentheendsofthebarnotexceeding2235mm.
Theabove
is
for
single
bar.
Bundles
of
bars
occupy
agreater
space,
therefore
2235
mm
limit
hasbeenselectedratherthe2400mmmaximumloadlimit. Generally,shippingwidthsgreater
than2400mmrequirethepermissionofauthoritiesormustbeshippedunderspecialfreight
rates.
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REFERENCES:
AmaricanConcreteInstitute(ACI)Committee318(2008)BuildingCodeRequirementsfor
StructuralConcrete,AmericanConcreteInstitute,FarmingtonHills,MI.
ConcreteReinforcing
Steel
Institute
CRSI
(2009)
Manual
of
Standard
Practice,
28th
Edition,
ConcreteReinforcingSteelInstitute,Schaumburg,IL.
ConcreteReinforcingSteelInstituteCRSI(2000)ReinforcingBarDetailing,4thEdition,
ConcreteReinforcingSteelInstitute,Schaumburg,IL.
BarlinesReinforcingSteelBulletins
PhilippineNationalStandardCDPNS49:2001,SteelbarsforreinforcementSpecifications,
PhilippineNationStandard (Copyattached)