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Welding Dictionary
MTE = Miller Technology Exclusive
Select the first letter of the term you are lookingfor: A C D E F G H I K L ! " # S $ % &
A Accu-Pulse™ (MTE) - IG 'rocess that (eli)ers 'recise control of the arc e)eno)er tack *el(s an( in tight corners+ "ro)i(es o'timum an( 'recise molten'u((le control+
Accu-Rated™ Power (MTE) - $he stan(ar( for measuring engine,(ri)engenerator 'o*er+ Guarantees (eli)ery of all 'o*er 'romise(+
Active Arc Stabilier™ (MTE) - Enhances arc starts an( 'ro)i(es a softer arcthroughout all ranges- *ith less 'u((le tur.ulence an( less s'atter+
Ada!tive "ot Start™ (MTE) - Automatically increases the out'ut am'erage atthe start of a Stick *el(- shoul( the start re/uire it+ Hel's eliminate sticking of theelectro(e at arc start+
Advanced Active #ield $ontrol Technology™ (MTE) - A sim'le an( relia.le'atente( *ay of accurately controlling an engine (ri)e0s generator *el( out'ut+
Air $arbon Arc $utting %$A$-A& - A cutting 'rocess .y *hich metals aremelte( .y the heat of an arc using a car.on electro(e+ olten metal is force(a*ay from the cut .y a .last of force( air+
Alternating $urrent %A$& - An electrical current that re)erses its (irection atregular inter)als- such as 12 cycles alternating current 3AC4- or 12 hert5+
Alu'inu' Pulse "ot Start™ (MTE) - Automatically 'ro)i(es more arc 'o*er tothe illermatic6 782" to eliminate a 9col( start9 that is inherent *ith aluminumstarts+
A'!erage - $he measurement of the amount of electricity flo*ing 'ast a gi)en'oint in a con(uctor 'er secon(+ Current is another name for am'erage+
Arc - $he 'hysical ga' .et*een the en( of the electro(e an( the .ase metal+$he 'hysical ga' causes heat (ue to resistance of current flo* an( arc rays+
Arc-Drive (MTE) - Automatically enhances Stick *el(ing- es'ecially on 'i'e- .yfocusing the arc an( 're)enting the electro(e from going out+
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Auto-$rater™ (MTE) - Allo*s a $IG arc on the $rail.la5er6 Series to crater,out-allo*ing time for the a((ition of filler- *ithout the loss of shiel(ing gas+ Eliminatesthe nee( for a remote control at arc en(+
Auto-(ine™ (MTE) - Allo*s for any 'rimary in'ut )oltage *ithin a range- single,
or three,'hase- 82 or 12 H5+ Also a(usts for )oltage s'ikes *ithin the entirerange+
Auto-(in)* (MTE) - Internal in)erter 'o*er source circuit that automatically linksthe 'o*er source to the 'rimary )oltage .eing a''lie( 3;72 % or <12 %4- *ithoutthe nee( for manually linking 'rimary )oltage terminals+
Auto'atic Start at +dle (MTE) - I(les engine imme(iately *hen starte(-eten(ing engine life an( re(ucing fuel consum'tion an( noise+
Auto'atic Welding - >ses e/ui'ment *hich *el(s *ithout the constant
a(usting of controls .y the *el(er or o'erator+ E/ui'ment controls ointalignment .y using an automatic sensing (e)ice+
Auto-Re,ire™ (MTE) , Automatically controls the 'ilot arc *hen cuttinge'an(e( metal or multi'le 'ieces of metal- *ithout manual re,triggering+
Auto Re'ote Sense™ (MTE) , Automatically s*itches machine from 'anel toremote control *ith remote connecte(+ A)aila.le on Dimension? @$ <82- $6782- $rail.la5er6 Series- an( "#! 722+ Eliminates confusion an( nee( for'anelBremote s*itch+
Auto-Sto!™ (MTE) - Allo*s a $IG arc to .e sto''e( *ithout the loss of shiel(inggas on the $rail.la5er6 Series+
Axcess™ #ile Manage'ent (MTE) - Soft*are that turns a stan(ar( "almhan(hel( into a (ata car( an( a remote 'en(ant for all Acess systems+ Allo*se,mailing- storage- an( transfer of *el(ing 'rograms+
$ $onstant $urrent %$$& Welding Machine - $hese *el(ing machines ha)elimite( maimum short circuit current+ $hey ha)e a negati)e )olt,am' cur)e an(are often referre( to as 9(roo'ers9+
$onstant-S!eed Wire #eeder - Fee(er o'erates from ;< or 8 %AC su''lie(.y the *el(ing 'o*er source+
$onstant oltage %$&. $onstant Potential %$P& Welding Machine - $his ty'eof *el(ing machine out'ut maintains a relati)ely sta.le- consistent )oltageregar(less of the am'erage out'ut+ It results in a relati)ely flat )olt,am' cur)e+
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$ool-/n-De'and™ (MTE) - Integrate( cooler runs only *hen nee(e(on Syncro*a)e6 ;82 D 782 L+
$urrent - Another name for am'erage+ $he amount of electricity flo*ing 'ast a'oint in a con(uctor e)ery secon(+
D De,ect - !ne or more (iscontinuities that cause a testing failure in a *el(+
Dig - Also calle( Arc Control+ Gi)es a 'o*er source )aria.le a((itional am'erage(uring lo* )oltage 3short arc length4 con(itions *hile *el(ing+ Hel's a)oi(sticking Stick electro(es *hen a short arc length is use(+
Direct $urrent %D$& - Flo*s in one (irection an( (oes not re)erse its (irection offlo* as (oes alternating current+
Direct $urrent Electrode 0egative %D$E0& - $he (irection of current flo*through a *el(ing circuit *hen the electro(e lea( is connecte( to the negati)eterminal an( the *ork lea( is connecte( to the 'ositi)e terminal of a DC *el(ingmachine+ Also calle( (irect current- straight 'olarity 3DCS"4+
Direct $urrent Electrode Positive %D$EP& - $he (irection of current flo*through a *el(ing circuit *hen the electro(e lea( is connecte( to a 'ositi)eterminal an( the *ork lea( is connecte( to a negati)e terminal to a DC *el(ingmachine+ Also calle( (irect current- re)erse 'olarity 3DC#"4+
Dual Power /!tion™ (MTE) - Gi)es the o'tion on the "i'e"ro? 72< engine
(ri)e to use ;72 )olt single, or three,'hase electric in'ut 'o*er- eliminatingengine *ear- noise an( emissions- as *ell as fuel costs+
Duty $ycle - $he num.er of minutes out of a 2,minute time 'erio( an arc*el(ing machine can .e o'erate( at maimum rate( out'ut+ An eam'le *oul(.e 12 (uty cycle at 722 am's+ $his *oul( mean that at 722 am's the *el(ingmachine can .e use( for 1 minutes an( then must .e allo*e( to cool *ith the fanmotor running for < minutes+
E Engine Save Start™ (MTE) - I(les engine 7 , < secon(s after startingon $rail.la5er6 ;8 DC an( 72;+ Eten(s engine life an( re(uces fuelconsum'tion+
# #an-/n-De'and™ (MTE) - Internal 'o*er source cooling system that only*orks *hen nee(e(- kee'ing internal com'onents cleaner+
#asTi!™ $ontact Ti! (MTE) - "atente(- single,turn for /uick change , no tools
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nee(e(+
#ixed Auto'ation - Automate(- electronically controlle( *el(ing system forsim'le- straight or circular *el(s+
#lexible Auto'ation - Automate(- ro.otically controlle( *el(ing system forcom'le sha'es an( a''lications *here *el(ing 'aths re/uire torch,anglemani'ulation+
#lux $ored Arc Welding %#$AW& - An arc *el(ing 'rocess *hich melts an( oins metals .y heating them *ith an arc .et*een a continuous- consuma.leelectro(e *ire an( the *ork+ Shiel(ing is o.taine( from a flu containe( *ithinthe electro(e core+ A((e( shiel(ing may or may not .e 'ro)i(e( from eternallysu''lie( gas or gas miture+
1
1as Metal Arc Welding %1MAW& - See IG &el(ing+
1as Tungsten Arc Welding %1TAW& - See $IG &el(ing+
1round $onnection - A safety connection from a *el(ing machine frame to theearth+ See &ork'iece Connection for the (ifference .et*een *ork connectionan( groun( connection+
1round (ead - &hen referring to the connection from the *el(ing machine tothe *ork- see 'referre( term&ork'iece Lea(+
1un-/n-De'and™ (MTE) - Allo*s you to use either a stan(ar( gun ora S'oolmatic6 gun on illermatic6 ;2- ;8- an( 782 *ithout fli''ing a s*itch+$he machine senses *hich gun you are using *hen you 'ull the trigger+
" "ert - Hert5 is often referre( to as 9cycles 'er secon(9+ In the >nite( States- thefre/uency or (irectional change of alternating current is usually 12 hert5+
"igh #re2uency - Co)ers the entire fre/uency s'ectrum a.o)e 82-222 H5+ >se(in $IG *el(ing for arc ignition an( sta.ili5ation+
"ot Start™ (MTE) - >se( on some Stick 3SA&4 machines to make it easier tostart (ifficult,to,start electro(es+ >se( for arc starting only+
+ +nverter - "o*er source *hich increases the fre/uency of the incoming 'rimary'o*er- thus 'ro)i(ing for a smaller si5e machine an( im'ro)e( electricalcharacteristics for *el(ing- such as faster res'onse time an( more control for'ulse *el(ing+
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S!ray Trans,er , @ame( for a s'ray of tiny molten (ro'letsacross the arc- usually smaller than the *ire (iameter+ >sesrelati)ely high )oltage an( am'erage )alues- an( the arc is onat all times after the arc is esta.lishe(+ %ery little if any s'atter is'ro(uce(+ >sually use( on thicker metals in the flat or hori5ontal
*el(ing 'ositions+Pulsed-S!ray Trans,er J For this )ariation of s'ray transfer- the*el(ing machine 'ulses the out'ut .et*een high 'eak currentsan( lo* .ackgroun( currents+ $he *el( 'ool gets to cool slightly(uring the .ackgroun( cycle- making it slightly (ifferent thanS'ray $ransfer+ $his can allo* for *el(ing in all 'ositions oneither thin or thick metals+
For more information on IG &el(ing- 'lease see IG $ech $i's+
MP™ %Multi-oltage Plug& (MTE) - Allo*s connection of illermatic6
D%I? or "ass'ort? to 8, or ;72,)olt rece'tacles *ithout tools , ust choosethe 'lug that fits the rece'tacles *ithout tools , ust choose the 'lug that fits therece'tacle+
/ /!en-$ircuit oltage %/$& - As the name im'lies- no current is flo*ing in thecircuit .ecause the circuit is o'en+ $he )oltage is im'resse( u'on the circuit-ho*e)er- so that *hen the circuit is com'lete(- the current *ill flo* imme(iately+
P Pal'™ /S $o'!atibility - #e'laces the nee( for (ata car(s an( remote control
'en(ants on Acess mo(els+
Plas'a Arc $utting - An arc cutting 'rocess *hich se)ers metal .y using aconstricte( arc to melt a small area of the *ork+ $his 'rocess can cut all metalsthat con(uct electricity+ For more information on "lasma Cutting- 'leasesee "lasma $ech $i's+
Pounds Per S2uare +nch %!si& - A measurement e/ual to a mass or *eighta''lie( to one s/uare inch of surface area+
Power E,,iciency - Ho* *ell an electrical machine uses the incoming electrical
'o*er+
Power #actor $orrection - @ormally use( on single,'hase- constant current'o*er sources- to re(uce the amount of 'rimary am'erage (eman(e( from the'o*er com'any *hile *el(ing+
Pri'ary Power - !ften referre( to as the in'ut line )oltage an( am'eragea)aila.le to the *el(ing machine from the sho'0s main 'o*er line+ !ften
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e'resse( in *atts or kilo*atts 3K&4- 'rimary in'ut 'o*er is AC an( may .esingle,'hase or three,'hase+
Pulsed M+1 %M+1-P& - A mo(ifie( s'ray transfer 'rocess that 'ro(uces nos'atter .ecause the *ire (oes not touch the *el( 'u((le+ A''lications .est
suite( for 'ulse( IG are those currently using the short circuit transfer metho(for *el(ing steel- < gauge 3+ mm4 an( u'+
Pulsed T+1 %T+1-P& - A mo(ifie( $IG 'rocess a''ro'riate for *el(ing thinnermaterials+
Pulsing - Se/uencing an( controlling the amount of current- the fre/uency- an(the (uration of the *el(ing arc+
R Rated (oad - $he am'erage an( )oltage the 'o*er source is (esigne( to
'ro(uce for a gi)en s'ecific (uty cycle 'erio(+ For eam'le- 722 am's- 7; loa()olts- at 12 (uty cycle+
Regulated Metal De!osition %RMD& (MTE) - "recisely controlle( short,circuittransfer technology- a)aila.le as an o'tion on Acess? mo(els+ For s'atterre(uction- u' to ;2 re(uce( heat in'ut- or filling ga's+
Resistance S!ot Welding %RSW& - A 'rocess in *hich t*o 'ieces of metal are oine( .y 'assing current .et*een electro(es 'ositione( on o''osite si(es of the'ieces to .e *el(e(+ $here is no arc *ith this 'rocess+ For more information on#esistance S'ot &el(ing- 'lease see #esistance S'ot &el(ing $ech $i's+
RMS %Root Mean S2uare& , $he 9effecti)e9 )alues of measure( AC )oltage oram'erage+ #S e/uals 2+2 times the maimum- or 'eak )alue+
S Se'iauto'atic Welding - $he e/ui'ment controls only the electro(e *irefee(ing+ $he *el(ing gun mo)ement is controlle( .y han(+
Shar!Arc* (MTE) - !'timi5es the si5e an( sha'e of the arc cone- .ea( *i(than( a''earance- an( 'u((le flui(ity+ A)aila.le on the illermatic6 782B782"+
Shielded Metal Arc Welding - See Stick &el(ing+
Shielding 1as - "rotecti)e gas use( to 're)ent atmos'heric contamination ofthe *el( 'ool+
Single-Phase $ircuit - An electrical circuit 'ro(ucing only one alternating cycle*ithin a 712 (egree time s'an+
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S'art #uel Tan) (MTE) - $ank0s (esign minimi5es chance of fuel .ackflo*+
S!atter - $he metal 'articles .lo*n a*ay from the *el(ing arc+ $hese 'articles(o not .ecome 'art of the com'lete( *el(+
S!ot Welding - >sually ma(e on materials ha)ing some ty'e of o)erla''ing oint(esign+ Can refer to resistance- IG or $IG s'ot *el(ing+ #esistance s'ot *el(sare ma(e from electro(es on .oth si(es of the oint- *hile $IG an( IG s'ots arema(e from one si(e only+
S2uarewave™ - $he AC out'ut of a 'o*er source that has the a.ility to ra'i(lys*itch .et*een the 'ositi)e an( negati)e half cycles of alternating current+
Stic) Welding %SMAW or Shielded Metal Arc& - An arc *el(ing 'rocess *hichmelts an( oins metals .y heating them *ith an arc- .et*een a co)ere( metalelectro(e an( the *ork+ Shiel(ing gas is o.taine( from the electro(e outer
coating- often calle( flu+ Filler metal is 'rimarily o.taine( from the electro(ecore+ For more information on Stick &el(ing- 'lease see Stick $ech $i's+
Sub'erged Arc Welding %SAW& 4PD#5 - A 'rocess .y *hich metals are oine(.y an arc or arcs .et*een a .are metal electro(e or electro(es an( the *ork+Shiel(ing is su''lie( .y a granular- fusi.le material usually .rought to the *orkfrom a flu ho''er+
Sun ision™ (MTE) , Allo*s easy rea(ing of (igital meters in (irect sunlight orsha(e on $rail.la5er ;8 DCan( 72;+
SureStart™ (MTE) - "ro)i(es consistent Acess? arc starts .y 'reciselycontrolling 'o*er le)els for s'ecific *ire an( gas com.inations+
Syncro Start™ (MTE) - Allo*s selecta.le customi5e( arc startson Syncro*a)e6 ;22- Syncro*a)e6 ;82 D an( 782 L
T Three-Phase $ircuit - An electrical circuit (eli)ering three cycles *ithin a 712(egree time s'an- an( the cycles are ;2 electrical (egrees a'art+
T+1 Welding %1TAW or 1as Tungsten Arc& - !ften calle( $IG *el(ing
3$ungsten Inert Gas4- this *el(ing 'rocess oins metals .y heating them *ith atungsten electro(e *hich shoul( not .ecome 'art of the com'lete( *el(+ Fillermetal is sometimes use( an( argon inert gas or inert gas mitures are use( forshiel(ing+ For more information on $IG &el(ing- 'lease see $IG $ech $i's+
Ti! Saver Short $ircuit Protection™ (MTE) - Shuts (o*n out'ut *henthe IG contact ti' is shorte( to the *ork- on the illermatic6 78 an( 8+Eten(s contact ti' life an( 'rotects machine+
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Trigger Reset - "ermits /uick reset at gun rather than at machine+
Torch - A (e)ice use( in the $IG 3G$A&4 'rocess to control the 'osition of theelectro(e- to transfer current to the arc- an( to (irect the flo* of the shiel(ing gas+
Torch Detection™ (MTE) - Syncro*a)e6 ;82 D an( 782 L (etect if $IG torchis *ater, or air,coole(+
Touch Start - A lo*,)oltage- lo*,am'erage arc starting 'roce(urefor $IG 3G$A&4+ $he tungsten is touche( to the *ork'iece *hen the tungsten islifte( from the *ork'iece an arc is esta.lishe(+
Tri-$or™ Technology (MTE) - Sta.ili5er (esign on the Mo.cat ;82 that (eli)erssmoother *el(s an( (ecrease( s'atter *ith E2 electro(es- *ithout sacrificing'erformance *ith E122 electro(es+
Tungsten - #are metallic element *ith etremely high melting 'oint37<2o Celsius4+ >se( in manufacturing$IG electro(es+
oltage - $he 'ressure or force that 'ushes the electrons through a con(uctor+%oltage (oes not flo*- .ut causes am'erage or current to flo*+ %oltage issometimes terme( electromoti)e force 3EF4 or (ifference in 'otential+
oltage-Sensing Wire #eeder - Fee(er o'erates from arc )oltage generate( .y*el(ing 'o*er source+
olt-A'! $urve - Gra'h that sho*s the out'ut characteristics of a *el(ing'o*er source+ Sho*s )oltage an( am'erage ca'a.ilities of a s'ecific machine+
W WaveWriter™ #ile Manage'ent (MTE) - Inclu(es all Acess? Fileanagement functions- 'lus a sim'le- gra'hical *a)e,sha'ing 'rogram for themost (eman(ing 'ulse( IG a''lications+
Weld at +dle™ (MTE) - Allo*s "i'e"ro? 72< to automatically *el( at a /uieter-lo*er #"- using less fuel+ &hen more out'ut is re/uire(- he machine goes tohigh s'ee( *ithout a change in arc+
Weld Metal - $he electro(e an( .ase metal that *as melte( *hile *el(ing *astaking 'lace+ $his forms the *el(ing .ea(+
Weld Trans,er - etho( .y *hich metal is transferre( from the *ire to themolten 'u((le+
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Wet-Stac)ing - >n.urne( fuel an( engine oil collecting in the ehaust stack of a(iesel engine- characteri5e( .y the ehaust stack .eing coate( *ith a .lack-sticky- oily su.stance+ $he con(ition is cause( .y the engine .eing run at toolight of a loa( for eten(e( 'erio(s of time+ Caught early- this (oes not cause'ermanent (amage an( can .e alle)iate( if a((itional loa( is a''lie(+ If ignore(-
'ermanent (amage can occur to the cylin(er *alls an( 'iston rings+ Im'ro)e(emission stan(ar(s an( higher /uality fuel make engines less 'rone to *et,stacking in recent years+
Wind Tunnel Technology™ (MTE) - Internal air flo* on many iller in)erters-that 'rotects electrical com'onents an( "C .oar(s from contamination-significantly im'ro)ing relia.ility+
Wire #eed S!eed - E'resse( in inBmin or mmBs- an( refers to the s'ee( an(amount of filler metal fe( into a *el(+ Generally s'eaking the higher the *ire fee(s'ee(- the higher the am'erage+
Wor)!iece $onnection - A means to fasten the *ork lea( 3*ork ca.le4 to the*ork 3metal to .e *el(e( on4+ Also- the 'oint at *hich this connection is ma(e+!ne ty'e of *ork connection is ma(e *ith an a(usta.le clam'+
Wor)!iece (ead - $he con(uctor ca.le or electrical con(uctor .et*een the arc*el(ing machine an( the *ork+
Section +6 Print Reading7-86 1E0ERA(
a+ Dra*ings+ Dra*ing or sketching is a uni)ersal language use( to con)ey all necessary information to the
in(i)i(ual *ho *ill fa.ricate or assem.le an o.ect+ "rints are also use( to illustrate ho* )arious e/ui'ment
is o'erate(- maintaine(- re'aire(- or lu.ricate(+ $he original (ra*ings for 'rints are ma(e either .y (irectly
(ra*ing or tracing a (ra*ing on a translucent tracing 'a'er or cloth using *ater'roof 3In(ia4 ink or a s'ecial
'encil+ $he original (ra*ing is referre( to as a tracing or master co'y+
.+ #e'ro(uction etho(s+ %arious metho(s of re'ro(uction ha)e .een (e)elo'e( *hich *ill 'ro(uce 'rints
of (ifferent colors from the master co'y+
34 !ne of the first 'rocesses (e)ise( to re'ro(uce a tracing 'ro(uce( *hite lines on a .lue .ackgroun(-
hence the term 9.lue'rints9+
3;4 A 'atente( 'a'er i(entifie( as 9M&9 'a'er 'ro(uces 'rints *ith .lack lines on a *hite .ackgroun(+
374 $he ammonia 'rocess- or 9!5ali(s9- 'ro(uces 'rints *ith either .lack- .lue- or maroon lines on a *hite
.ackgroun(+
3<4 %an(yke 'a'er 'ro(uces a *hite line on a (ark .ro*n .ackgroun(+
384 !ther re'ro(uction metho(s are the mimeogra'h machine- (itto machine- an( 'hotostatic 'rocess+
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7-96 PARTS /# A DRAW+01
a+ $itle Mlock+ $he title .lock contains the (ra*ing num.er an( all the information re/uire( to i(entify the 'art
or assem.ly re'resente(+ A''ro)e( military 'rints *ill inclu(e the name an( a((ress of the Go)ernment Agency or organi5ation 're'aring the (ra*ing- the scale- the (rafting recor(- authentication- an( the (ate+
.+ #e)ision Mlock+ Each (ra*ing has a re)ision .lock *hich is usually locate( in the u''er right corner+ All
changes to the (ra*ing are note( in this .lock+ Changes are (ate( an( i(entifie( .y a num.er or letter+ If a
re)ision .lock is not use(- a re)ise( (ra*ing may .e sho*n .y the a((ition of a letter to the original
num.er+
c+ Dra*ing @um.er+ All (ra*ings are i(entifie( .y a (ra*ing num.er+ If a 'rint has more than one sheet an(
each sheet has the same num.er- this information is inclu(e( in the num.er .lock- in(icating the sheet
num.er an( the num.er of sheets in the series+
(+ #eference @um.ers an( Dash @um.ers+ #eference num.ers that a''ear in the title .lock refer to other
'rint num.ers+ &hen more than one (etail is sho*n on a (ra*ing- (ashes an( num.ers are fre/uently use(+
If t*o 'arts are to .e sho*n in one (etail (ra*ing- .oth 'rints *ill ha)e the same (ra*ing num.er 'lus a
(ash an( an in(i)i(ual num.er such as 72;, an( 72;,;+
e+ Scale+ $he scale of the 'rint is in(icate( in one of the s'aces *ithin the title .lock+ It in(icates the si5e of
the (ra*ing as com'are( *ith the actual si5e of the 'art+ @e)er measure a (ra*ing,,use (imensions+ $he
'rint may ha)e .een re(uce( in si5e from the original (ra*ing+
f+ Mill of aterial+ A s'ecial .lock or .o on the (ra*ing may contain a list of necessary stock to make an
assem.ly+ It also in(icates the ty'e of stock- si5e- an( s'ecific amount re/uire(+
7-76 $/0STR:$T+/0 (+0ES
a+ Full Lines 3A- fig+ 7,4+ Full lines re'resent the )isi.le e(ges or outlines of an o.ect+
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*a)y- semi'arallel lines cutting off the o.ect outline across a uniform section+ Long .reak lines are long
(ash 'arallel lines *ith each long (ash in the line connecte( to the net .y a 9;9 or shar' *a)e line+
Section II+ &ELD A@D &ELDI@G SOM!LS
7-;6 1E0ERA(
&el(ing cannot take its 'ro'er 'lace as an engineering tool unless means are 'ro)i(e( for con)eying the
information from the (esigner to the *orkmen+ &el(ing sym.ols 'ro)i(e the means of 'lacing com'lete
*el(ing information on (ra*ings+ $he scheme for sym.olic re'resentation of *el(s on engineering (ra*ings
use( in this manual is consistent *ith the 9thir( angle9 metho( of 'roection+ $his is the metho(
're(ominantly use( in the >nite( States+
$he oint is the .asis of reference for *el(ing sym.ols+ $he reference line of the *el(ing sym.ol 3fig+ 7,;4 is
use( to (esignate the ty'e of *el( to .e ma(e- its location- (imensions- etent- contour- an( other
su''lementary information+ Any *el(e( oint in(icate( .y a sym.ol *ill al*ays ha)e an arro* si(e an( an
other si(e+ Accor(ingly- the terms arro* si(e- other si(e- an( .oth si(es are use( herein to locate the *el(
*ith res'ect to the oint+
$he tail of the sym.ol is use( for (esignating the *el(ing an( cutting 'rocesses as *ell as the *el(ing
s'ecifications- 'roce(ures- or the su''lementary information to .e use( in making the *el(+ If a *el(er
kno*s the si5e an( ty'e of *el(- he has only 'art of the information necessary for making the *el(+ $he
'rocess- i(entification of filler metal that is to .e use(- *hether or not 'eening or root chi''ing is re/uire(-
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as sho*n in figure 7,<+
3;4 &hen the use of a (efinite 'rocess is re/uire( 3fig+ 7,84- the 'rocess may .e in(icate( .y one or more of
the letter (esignations sho*n in ta.les 7, an( 7,;+
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0/TE
Letter (esignations ha)e not .een assigne( to arc s'ot- resistance s'ot- arc seam- resistance seam- an(
'roection *el(ing since the *el( sym.ols use( are a(e/uate+
374 &hen no s'ecification- 'rocess- or other sym.ol- the tail may .e omitte( 3fig+ 7,14+ reference is use( *ith
a *el(ing
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.+ "lug- Slot- Arc S'ot- Arc Seam- #esistance S'ot- #esistance Seam- an( "roection &el(ing Sym.ols+ For
these sym.ols- the arro* connects the *el(ing sym.ol reference line to the outer surface of one mem.er of
the oint at the center line of the (esire( *el(+ $he mem.er to *hich the arro* 'oints is consi(ere( the
arro* si(e mem.er+ $he other mem.er of the oint shall .e consi(ere( the other si(e mem.er 3fig+ 7,4+
c+ @ear Si(e+ &hen a oint is (e'icte( .y a single line on the (ra*ing an( the arro* of a *el(ing sym.ol is
(irecte( to this line- the arro* si(e of the oint is consi(ere( as the near si(e of the oint- in accor(ance *ith
the usual con)entions of (rafting 3fig+ 7,; an( 7,74+
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(+ @ear em.er+ &hen a oint is (e'icte( as an area 'arallel to the 'lane of 'roection in a (ra*ing an( the
arro* of a *el(ing sym.ol is (irecte( to that area- the arro* si(e mem.er of the oint is consi(ere( as the
near mem.er of the oint- in accor(ance *ith the usual con)entions of (rafting 3fig+ 7,4+
7-6 (/$AT+/0 /# T"E WE(D W+T" RESPE$T T/ B/+0T
a+ Arro* Si(e+ &el(s on the arro* si(e of the oint are sho*n .y 'lacing the *el( sym.ol on the si(e of the
reference line to*ar( the rea(er 3fig+ 7,<4+
.+ !ther Si(e+ &el(s on the other si(e of the oint are sho*n .y 'lacing the *el( sym.ol on the si(e of the
reference line a*ay from the rea(er 3fig+ 7,84+
c+ Moth Si(es+ &el(s on .oth si(es of the oint are sho*n .y 'lacing *el( sym.ols on .oth si(es of the
reference line- to*ar( an( a*ay from the rea(er 3fig+ 7,14+
(+ @o Si(e Significance+ #esistance s'ot- resistance seam- flash- *el( sym.ols ha)e no arro* si(e or other
si(e significance in themsel)es- although su''lementary sym.ols use( in conunction *ith these sym.ols
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may ha)e such significance+ For eam'le- the flush contour sym.ol 3fig+ 7,74 is use( in conunction *ith the
s'ot an( seam sym.ols 3fig+ 7,4 to sho* that the e'ose( surface of one mem.er of the oint is to .e
flush+ #esistance s'ot- resistance seam- flash- an( u'set *el( sym.ols shall .e centere( on the reference
line 3fig+ 7,4+
7-C6 RE#ERE0$ES A0D 1E0ERA( 0/TES
a+ Sym.ols &ith #eferences+ &hen a s'ecification- 'rocess- or other reference is use( *ith a *el(ing
sym.ol- the reference is 'lace( in the tail 3fig+ 7,<4+
.+ Sym.ols &ithout #eferences+ Sym.ols may .e use( *ithout s'ecification- 'rocess- or other references
*hen:
34 A note similar to the follo*ing a''ears on the (ra*ing: 9>nless other*ise (esignate(- all *el(s are to .e
ma(e in accor(ance *ith s'ecification no++++9
3;4 $he *el(ing 'roce(ure to .e use( is (escri.e( else*here- such as in sho' instructions an( 'rocess
sheets+
c+ General @otes+ General notes similar to the follo*ing may .e 'lace( on a (ra*ing to 'ro)i(e (etaile(
information 'ertaining to the 're(ominant *el(s+ $his information nee( not .e re'eate( on the sym.ols:
34 9>nless other*ise in(icate(- all fillet *el(s are 8B1 in+ 32+2 cm4 si5e+9
3;4 9>nless other*ise in(icate(- root o'enings for all groo)e *el(s are 7B1 in+ 32+< cm4+9
(+ "rocess In(ication+ &hen use of a (efinite 'rocess is re/uire(- the 'rocess may .e in(icate( .y the letter
(esignations liste( in ta.les 7, an( 7,; 3fig+ 7,84+
e+ Sym.ol &ithout a $ail+ &hen no s'ecification- 'rocess- or other reference is use( *ith a *el(ing sym.ol-the tail may .e omitte( 3fig+ 7,14+
7-86 WE(D-A((-AR/:0D A0D #+E(D WE(D S=M>/(S
a+ &el(s eten(ing com'letely aroun( a oint are in(icate( .y mans of the *el(,all,aroun( sym.ol 3fig+ 7,4+
&el(s that are com'letely aroun( a oint *hich inclu(es more than one ty'e of *el(- in(icate( .y a
com.ination *el( sym.ol- are also (e'icte( .y the *el(,all,aroun( sym.ol+ &el(s com'letely aroun( a oint
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in *hich the metal intersections at the 'oints of *el(ing are in more than one 'lane are also in(icate( .y the
*el(,all,aroun( sym.ol+
.+ Fiel( *el(s are *el(s not ma(e in a sho' or at the 'lace of initial construction an( are in(icate( .y means
of the fiel( *el( sym.ol 3fig+ 7,4+
7-886 ETE0T /# WE(D+01 DE0/TED >= S=M>/(S
a+ A.ru't Changes+ Sym.ols a''ly .et*een a.ru't changes in the (irection of the *el(ing or to the etent of
hatching of (imension lines- ece't *hen the *el(,all,aroun( sym.ol 3fig+ 7,74 is use(+
.+ Hi((en Points+ &el(ing on hi((en oints may .e co)ere( *hen the *el(ing is the same as that of the
)isi.le oint+ $he (ra*ing in(icates the 'resence of hi((en mem.ers+ If the *el(ing on the hi((en oint is
(ifferent from that of the )isi.le oint- s'ecific information for the *el(ing of .oth must .e gi)en+
7-896 (/$AT+/0 /# WE(D S=M>/(S
a+ &el( sym.ols- ece't resistance s'ot an( resistance seam- must .e sho*n only on the *el(ing sym.ol
reference line an( not on the lines of the (ra*ing+
.+ #esistance s'ot an( resistance seam *el( sym.ols may .e 'lace( (irectly at the locations of the (esire(
*el(s 3fig+ 7,4+
7-876 :SE /# +0$". DE1REE. A0D P/:0D MAR3S
0/TE
Inch marks are use( for in(icating the (iameter of arc s'ot- resistance s'ot- an( circular 'roection *el(s-
an( the *i(th of arc seam an( resistance seam *el(s *hen such *el(s are s'ecifie( .y (ecimal
(imensions+
In general- inch- (egree- an( 'oun( marks may or may not .e use( on *el(ing sym.ols- as (esire(+
7-8;6 $/0STR:$T+/0 /# S=M>/(S
a+ Fillet- .e)el an( P,groo)e- flare .e)el groo)e- an( corner flange sym.ols shall .e sho*n *ith the
'er'en(icular leg al*ays to the left 3fig+ 7,4+
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f+ &hen the .asic *el( sym.ols are ina(e/uate to in(icate the (esire( *el(- the *el( shall .e sho*n .y a
cross section- (etail- or other (ata *ith a reference on the *el(ing sym.ol accor(ing to location
s'ecifications gi)en in 'ara 7, 3fig+ 7,;74+
g+ $*o or more reference lines may .e use( to in(icate a se/uence of o'erations+ $he first o'eration must
.e sho*n on the reference line nearest the arro*+ Su.se/uent o'erations must .e sho*n se/uentially on
other reference lines 3fig+ 7,;<4+ A((itional reference lines may also .e use( to sho* (ata su''lementary to
*el(ing sym.ol information inclu(e( on the reference line nearest the arro*+ $est information may .e sho*n
on a secon( or thir( line a*ay from the arro* 3fig+ 7,;84+ &hen re/uire(- the *el(,all,aroun( sym.ol must
.e 'lace( at the unction of the arro* line an( reference line for each o'eration to *hich it a''lies 3fig+ 7,;14+
$he fiel( *el( sym.ol may also .e use( in this manner+
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7-8<6 #+((ET WE(DS
Dimensions of fillet *el(s must .e sho*n on the same si(e of the reference line as the *el( sym.ol 3A- fig+
7,;4+
.+ &hen fillet *el(s are in(icate( on .oth si(es of a oint an( no general note go)erning the (imensions of
the *el(s a''ears on the (ra*ing- the (imensions are in(icate( as follo*s:
34 &hen .oth *el(s ha)e the same (imensions- one or .oth may .e (imensione( 3M or C- fig+ 7,;4+
3;4 &hen the *el(s (iffer in (imensions- .oth must .e (imensione( 3D- fig+ 7,;4+
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c+ &hen fillet *el(s are in(icate( on .oth si(es of a oint an( a general note go)erning the (imensions of the
*el(s a''ears on the (ra*ing- neither *el( nee( .e (imensione(+ Ho*e)er- if the (imensions of one or
.oth *el(s (iffer from the (imensions gi)en in the general note- .oth *el(s must .e (imensione( 3C or D-
fig+ 7,;4+
7-8?6 S+FE /# #+((ET WE(DS
a+ $he si5e of a fillet *el( must of a fillet *el( .e sho*n to the left of the *el( sym.ol 3A- fig+ 7,;4+
.+ $he si5e the fillet *el( *ith une/ual legs must .e sho*n in 'arentheses to left of the *el( sym.ol+ &el(
orientation is not sho*n .y the sym.ol an( must .e sho*n on the (ra*ing *hen necessary 3E- fig+ 7,;4+
c+ >nless other*ise in(icate(- the (e'osite( fillet *el( si5e must not .e less than the si5e sho*n on the
(ra*ing+
(+ &hen 'enetration for a gi)en root o'ening is s'ecifie(- the ins'ection metho( for (etermining 'enetration
(e'th must .e inclu(e( in the a''lica.le s'ecification+
7-8@6 (E01T" /# #+((ET WE(DS
a+ $he length of a fillet *el(- *hen in(icate( on the *el(ing sym.ol- must .e sho*n to the right of the *el(
sym.ol 3A through D- fig+ 7,;4+
.+ &hen fillet *el(ing eten(s for the full (istance .et*een a.ru't changes in the (irection of the *el(ing-
no length (imension nee( .e sho*n on the *el(ing sym.ol+
c+ S'ecific lengths of fillet *el(ing may .e in(icate( .y sym.ols in conunction *ith (imension lines 3fig+ 7,
;4+
7-86 ETE0T /# #+((ET WE(D+01
a+ >se one ty'e of hatching 3*ith or *ithout (efinite lines4 to sho* the etent of fillet *el(ing gra'hically+
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.+ Fillet *el(ing eten(ing .eyon( a.ru't changes in the (irection of the *el(ing must .e in(icate( .y
a((itional arro*s 'ointing to each section of the oint to .e *el(e( 3fig+ 7,;N4 ece't *hen the *el(,all,
aroun( sym.ol is use(+
7-8C6 D+ME0S+/0+01 /# +0TERM+TTE0T #+((ET WE(D+01
a+ $he 'itch 3center,to,center s'acing4 of intermittent fillet *el(ing shall .e sho*n as the (istance .et*een
centers of increments on one si(e of the oint+
.+ $he 'itch of intermittent fillet *el(ing shall .e sho*n to the right of the length (imension 3A- fig 7,;4+
c+ Dimensions of chain intermittent fillet *el(ing must .e sho*n on .oth si(es of the reference line+ Chain
intermittent fillet *el(s shall .e o''osite each other 3fig+ 7,724+
(+ Dimensions of staggere( intermittent fillet *el(ing must .e sho*n on .oth si(es of the reference line as
sho*n in figure 7,7+
>nless other*ise s'ecifie(- staggere( intermittent fillet *el(s on .oth si(es shall .e symmetrically s'ace(
as in figure 7,7;+
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7-96 TERM+0AT+/0 /# +0TERM+TTE0T #+((ET WE(D+01
a+ &hen intermittent fillet *el(ing is use( .y itself- the sym.ol in(icates that increments are locate( at the
en(s of the (imensione( length+
.+ &hen intermittent fillet *el(ing is use( .et*een continuous fillet *el(ing- the sym.ol in(icates that
s'aces e/ual to the 'itch minus the length of one increment shall .e left at the en(s of the (imensione(
length+
c+ Se'arate sym.ols must .e use( for intermittent an( continuous fillet *el(ing *hen the t*o are com.ine(
along one si(e of the oint 3fig+ 7,;4+
7-986 S:R#A$E $/0T/:R /# #+((ET WE(DS
a+ Fillet *el(s that are to .e *el(e( a''roimately flat- con)e- or conca)e face( *ithout recourse to any
metho( of finishing must .e sho*n .y a((ing the flush- con)e- or conca)e contour sym.ol to the *el(
sym.ol- in accor(ance *ith the location s'ecifications gi)en in 'aragra'h 7, 3A- fig+ 7,774+
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the *el( sym.ol 3fig+ 7,74+
g+ Details of Slot &el(s+ Length- *i(th- s'acing- inclu(e( angle of countersink- orientation- an( location of
slot *el(s cannot .e sho*n on the *el(ing sym.ols+ $his (ata must .e sho*n on the (ra*ing or .y a (etail
*ith a reference to it on the *el(ing sym.ol- in accor(ance *ith location s'ecifications gi)en in 'aragra'h 7,
3D- fig+ 7,774+
7-976 AR$ SP/T A0D AR$ SEAM WE(DS
a+ General+ $he s'ot *el( sym.ol- in accor(ance *ith its location in relation to the reference line- may or
may not ha)e arro* si(e or other si(e significance+ Dimensions must .e sho*n on the same si(e of the
reference line as the sym.ol or on either si(e *hen the sym.ol is locate( astri(e the reference line an( has
no arro* si(e or other si(e significance+ $he 'rocess reference is in(icate( in the tail of the *el(ing sym.ol+
$hen 'roection *el(ing is to .e use(- the s'ot *el( sym.ol shall .e use( *ith the 'roection *el(ing
'rocess reference in the tail of the *el(ing sym.ol+ $he s'ot *el( sym.ol must .e centere( a.o)e or .elo*
the- reference line+
.+ Si5e of Arc S'ot an( Arc Seam &el(s+
34 $hese *el(s may .e (imensione( .y either si5e or strength+
3;4 $he si5e of arc s'ot *el(s must .e (esignate( as the (iameter of the *el(+ Arc seam *el( si5e shall .e
(esignate( as the *i(th of the *el(+ Dimensions *ill .e e'resse( in fractions or in (ecimals in hun(re(ths
of an inch an( shall .e sho*n- *ith or *ithout inch marks- to the left of the *el( sym.ol 3A- fig+ 7,74+
374 $he strength of arc s'ot *el(s must .e (esignate( as the minimum acce't,a.le shear strength in 'oun(s
or ne*tons 'er s'ot+ In arc seam *el(s- strength is (esignate( in 'oun(s 'er linear inch+ Strength is sho*n
to the left of the *el( sym.ol 3M- fig+ 7,74+
c+ S'acing of Arc S'ot an( Arc Seam &el(s+
34 $he 'itch 3center,to,center s'acing4 of arc s'ot *el(s an(- *hen in(icate(- the length of arc seam *el(s-
must .e sho*n to the right of the *el( sym.ol 3C- fig+ 7,74+
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3;4 &hen s'ot *el(ing or arc seam *el(ing eten(s for the full (istance .et*een a.ru't changes in the
(irection of *el(ing- no length (imension nee( .e sho*n on the *el(ing sym.ol+
(+ Etent an( @um.er of Arc S'ot &el(s an( Arc Seam &el(s+
34 &hen arc s'ot *el(ing eten(s less than the (istance .et*een a.ru't changes in the (irection of
*el(ing or less than the full length of the oint- the etent must .e (imensione( 3fig+ 7,7N4+
3;4 &hen a (efinite num.er of arc s'ot *el(s is (esire( in a certain oint- the num.er must .e sho*n in
'arentheses either a.o)e or .elo* the *el( sym.ol 3fig+ 7,<24+
374 A grou' of s'ot *el(s may .e locate( on a (ra*ing .y intersecting center lines+ $he arro*s 'oint to at
least one of the centerlines 'assing through each *el( location+
e+ Flush Arc S'ot an( Arc Seam &el(e( Points+ &hen the e'ose( surface of one mem.er of an arc s'ot or
arc seam *el(e( oint is to .e flush- that surface must .e in(icate( .y a((ing the flush contour sym.ol 3fig+
7,<4 in the same manner as that for fillet *el(s 3'ara 7,;4+
f+ Details of Arc Seam &el(s+ S'acing- etent- orientation- an( location of arc seam *el(s cannot .e sho*n
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on the *el(ing sym.ols+ $his (ata must .e sho*n on the (ra*ing+
7-9;6 1R//E WE(DS
a+ General+
34 Dimensions of groo)e *el(s must .e sho*n on the same si(e of the reference line as the *el( sym.ol
3fig+ 7,<;4+
3;4 &hen no general note go)erning the (imensions of (ou.le groo)e *el(s a''ears- (imensions shall .e
sho*n as follo*s:
3a4 &hen .oth *el(s ha)e the same (imensions- one or .oth may .e (imensione( 3fig+ 7,<74+
3.4 &hen the *el(s (iffer in (imensions- .oth shall .e (imensione( 3fig+ 7,<<4+
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374 &hen a general note go)erning the (imensions of groo)e *el(s a''ears- the (imensions of (ou.le
groo)e *el(s shall .e in(icate( as follo*s:
3a4 If the (imensions of .oth *el(s are as in(icate( in the note- neither sym.ol nee( .e (imensione(+
3.4 &hen the (imensions of one or .oth *el(s (iffer from the (imensions gi)en in the general note- .oth
*el(s shall .e (imensione( 3fig+ 7,<<4+
.+ Si5e of Groo)e &el(s+
34 $he si5e of groo)e *el(s shall .e sho*n to the left of the *el( sym.ol 3fig+ 7,<<4+
3;4 S'ecifications for groo)e *el(s *ith no s'ecifie( root 'enetration are sho*n as follo*s:
3a4 $he si5e of single groo)e an( symmetrical (ou.le groo)e *el(s *hich eten( com'letely through the
mem.er or mem.ers .eing oine( nee( not .e sho*n on the *el(ing sym.ol 3A an( M- fig+ 7,<84+
3.4 $he si5e of groo)e *el(s *hich eten( only 'artly through the mem.er mem.ers .eing oine( must .e
sho*n on the *el(ing sym.ol 3A an( M- fig+ 7,<14+
374 $he groo)e *el(s- si5e of groo)e *el(s *ith s'ecifie( root 'enetration- ece't s/uare must .e in(icate(
.y sho*ing the (e'th of chamfering an( the root 'enetration se'arate( .y a 'lus mark an( 'lace( to the leftof the *el( sym.ol+ $he (e'th of chamfering an( the root 'enetration must rea( in that or(er from left to
right along the reference line 3A an( M- fig+ 7,<4+ $he si5e of s/uare groo)e *el(s must .e in(icate( .y
sho*ing only the root 'enetration+
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3<4 $he si5e of flare groo)e *el(s is consi(ere( to eten( only to the tangent 'oints as in(icate( .y
(imension lines 3fig+ 7,<4+
c+ Groo)e Dimensions
34 #oot o'ening- groo)e angle- groo)e ra(ii- an( root faces of the > an( P groo)e *el(s are the user0s
stan(ar( unless other*ise in(icate(+
3;4 &hen the user0s stan(ar( is not use(- the *el( sym.ols are as follo*s:
3a4 #oot o'ening is sho*n insi(e the *el( sym.ol 3fig+ 7,<N4+
3.4 Groo)e angle of groo)e *el(s is sho*n outsi(e the *el( sym.ol 3fig+ 7,<;4+
3c4 Groo)e ra(ii an( root faces of > an( P groo)e *el(s are sho*n .y a cross section- (etail- or other (ata-
*ith a reference to it on the *el(ing sym.ol- in accor(ance *ith location s'ecifications gi)en in 'aragra'h 7,
3fig+ 7,;;4+
(+ Mack an( Macking &el(s+ Mea(,ty'e .ack an( .acking *el(s of single,groo)e *el(s shall .e sho*n .y
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means of the .ack or .acking *el( sym.ol 3fig+ 7,824+
e+ Surface Contour of Groo)e &el(s+ $he contour sym.ols for groo)e *el(s 3F- fig+ 7,84 are in(icate( in
the same manner as that for fillet *el(s 3'ara 7,;4+
34 Groo)e *el(s that are to .e *el(e( a''roimately flush *ithout recourse to any metho( of finishing shall
.e sho*n .y a((ing the flush contour sym.ol to the *el( sym.ol- in accor(ance *ith the location
s'ecifications gi)en in 'aragra'h 7, 3fig+ 7,8;4+
3;4 Groo)e *el(s that are to .e ma(e flush .y mechanical means shall .e sho*n .y a((ing the flush
contour sym.ol an( the user0s stan(ar( finish sym.ol to the *el( sym.ol- in accor(ance *ith the location
s'ecifications gi)en in 'aragra'h 7, 3fig+ 7,874+
374 Groo)e *el(s that are to .e mechanically finishe( to a con)e contour shall .e sho*n .y a((ing .oth the
con)e contour sym.ol an( the user0s stan(ar( finish sym.ol to the *el( sym.ol- in accor(ance *ith the
location s'ecifications gi)en in 'ara 7, 3fig+ 7,8<4+
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3;4 elt,thru *el(s shall .e sho*n .y 'lacing the melt,thru *el( sym.ol on the si(e of the reference line
o''osite the groo)e *el(- flange- tee- or corner *el( sym.ol 3fig+ 7,814+
374 Dimensions of melt,thru *el(s shoul( rot .e sho*n on the *el(ing sym.ol+ If it is (esire( to s'ecify these
(imensions- they must .e sho*n on the (ra*ing+
.+ Surface Contour of elt,thru &el(s+ $he contour sym.ols for melt,thru *el(s are in(icate( in the same
manner as that for fillet *el(s 3fig+ 7,84+
7-9@6 S:R#A$+01 WE(DS
a+ General+
34 $he surfacing *el( sym.ol shall .e use( to in(icate surfaces .uilt u' .y *el(ing 3fig+ 7,84- *hether .uilt
u' .y single,or multi'le,'ass surfacing *el(s+
3;4 $he surfacing *el( sym.ol (oes not in(icate the *el(ing of a oint an( thus has no arro* or other si(e
significance+ $his sym.ol shall .e (ra*n on the si(e of the reference line to*ar( the rea(er an( the arro*
shall 'oint clearly to the surface on *hich the *el( is to .e (e'osite(+
.+ Si5e of Muilt,u' Surfaces+ $he si5e 3height4 of a surface .uilt u' .y *el(ing shall .e in(icate( .y sho*ing
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the minimum height of the *el( (e'osit to the left of the *el( sym.ol+ $he (imensions shall al*ays .e on
the same si(e of the reference line as the *el( sym.ol 3fig+ 7,84+ &hen no s'ecific height of *el( (e'osit is
(esire(- no si5e (imension nee( .e sho*n on the *el(ing sym.ol+
c+ Etent- Location- an( !rientation of Surfaces Muilt u' .y &el(ing+ &hen the entire area of a 'lane or
cur)e( surface is to .e .uilt u' .y *el(ing- no (imension- other than si5e- nee( .e sho*n on the *el(ingsym.ol+ If only a 'ortion of the area of a 'lane or cur)e( surface is to .e .uilt u' .y *el(ing- the etent-
location- an( orientation of the area to .e .uilt u' shall .e in(icate( on the (ra*ing+
7-96 #(A01E WE(DS
a+ General+
34 $he follo*ing *el(ing sym.ols are use( for light gage metal oints in)ol)ing the flaring or flanging of the
e(ges to .e oine( 3fig+ 7,8N4+ $hese sym.ols ha)e no arro* or other si(e significance+
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3;4 E(ge flange *el(s shall .e sho*n .y the e(ge flange *el( sym.ol 3A- fig+ 7,8N4+
374 Corner flange *el(s shall .e sho*n .y the corner flange *el( sym.ol 3M- fig+ 7,8N4+ In cases *here the
corner flange oint is not (etaile(- a .reak in the arro* is re/uire( to sho* *hich mem.er is flange( 3fig+ 7,
8N4+
.+ Dimensions of Flange &el(s+
34 Dimensions of flange *el(s are sho*n on the same si(e of the reference line as the *el( sym.ol+
3;4 $he ra(ius an( the height a.o)e the 'oint of tangency must .e in(icate( .y sho*ing the ra(ius an(
height- se'arate( .y a 'lus mark- an( 'lace( to the left of the *el( sym.ol+ $he ra(ius an( height must rea(
in that or(er from left to right along the reference line 3C- fig+ 7,8N4+
374 $he si5e 3thickness4 of flange *el(s must .e sho*n .y a (imension 'lace( out*ar( of the flange
(imensions 3C- fig+ 7,8N4+
3<4 #oot o'ening of flange *el(s are not sho*n on the *el(ing sym.ol+ If s'ecification of this (imension is
(esire(- it must .e sho*n on the (ra*ing+
c+ ulti'le,Point Flange &el(s+ For flange *el(s in *hich one or more 'ieces are inserte( .et*een the t*o
outer 'ieces- the same sym.ol shall .e use( as for the t*o outer 'ieces- regar(less of the num.er of 'ieces
inserte(+
7-9C6 RES+STA0$E SP/T WE(DS
a+ General+ #esistance s'ot *el( sym.ols 3fig+ 7,74 ha)e no arro* or other si(e significance in themsel)es-
although su''lementary sym.ols use( in con,unction *ith them may ha)e such significance+ #esistance
s'ot *el( sym.ols shall .e centere( on the reference line+ Dimensions may .e sho*n on either si(e of the
reference line+
.+ Si5e of #esistance S'ot &el(s+ #esistance s'ot *el(s are (imensione( .y either si5e or strength as
follo*s:
34 $he si5e of resistance s'ot *el(s is (esignate( as the (iameter of the *el( e'resse( in fractions or in
(ecimals in hun(re(ths of an inch an( must .e sho*n- *ith or *ithout inch marks- to the left of the *el(
sym.ol 3Qfig+ 7,124+
3;4 $he strength of resistance s'ot *el(s is (esignate( as the minimum acce'ta.le shear strength in 'oun(s
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'er s'ot an( must .e sho*n to the left of the *el( sym.ol 3fig+ 7,14+
c+ S'acing of #esistance S'ot &el(s+
34 $he 'itch of resistance s'ot *el(s shall .e sho*n to the right of the *el( sym.ol 3fig+ 7,1;4+
3;4 &hen the sym.ols are sho*n (irectly on the (ra*ing- the s'acing is sho*n .y using (imension lines+
374 &hen resistance s'ot *el(ing eten(s less than the (istance .et*een a.ru't changes in the (irection of
the *el(ing or less than the full length of the oint- the etent must .e (imensione( 3fig+ 7,174+
(+ @um.er of #esistance S'ot &el(s+ &hen a (efinite num.er of *el(s is (esire( in a certain oint- the
num.er must .e sho*n in 'arentheses either a.o)e or .elo* the *el( sym.ol 3fig+ 7,1<4+
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e+ Flush #esistance S'ot &el(ing Points+ &hen the e'ose( surface of one mem.er of a resistance s'ot
*el(e( oint is to .e flush- that surface shall .e in(icate( .y a((ing the flush contour sym.ol 3fig+ 7,74 to the
*el( sym.ol- 3fig+ 7,184 in accor(ance *ith location s'ecifications gi)en in 'aragra'h 7,+
7-76 RES+STA0$E SEAM WE(DS
a+ General+
34 #esistance seam *el( sym.ols ha)e no arro* or other si(e significance in themsel)es- although
su''lementary sym.ols use( in inunction *ith them may ha)e such significance+ #esistance seam *el(sym.ols must .e centere( on the reference line+
3;4 Dimensions of resistance seam *el(s may .e sho*n on either si(e of the reference line+
.+ Si5e of #esistance Seam &el(s+ #esistance seam *el(s must .e (imensione( .y either si5e or strength
as follo*s:
34 $he si5e of resistance seam *el(s must .e (esignate( as the *i(th of the *el( e'resse( in fractions or
in (ecimals in hun(re(ths of an inch an( shall .e sho*n- *ith or *ithout inch marks- to the left of the *el(
sym.ol 3fig+ 7,114+
3;4 $he strength of resistance seam *el(s must .e (esignate( as the minimum acce'ta.le shear strength in
'oun(s 'er linear inch an( must .e sho*n to the left of the *el( sym.ol 3fig+ 7,14+
c+ Length of #esistance Seam &el(s+
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34 $he length of a resistance seam *el(- *hen in(icate( on the *el(ing sym.ol- must .e sho*n to the right
of the *el(ing sym.ol 3fig+ 7,14+
3;4 &hen resistance seam *el(ing eten(s for the full (istance .et*een a.ru't changes in the (irection of
the *el(ing- no length (imension nee( .e sho*n on the *el(ing sym.ol+
374 &hen resistance seam *el(ing eten(s less than the (istance .et*een a.ru't changes in the (irection
of the *el(ing or less than the full length of the oint- the etent must .e (imensione( 3fig+ 7,1N4+
(+ "itch of #esistance Seam &el(s+ $he 'itch of intermittent resistance seam *el(ing shall .e (esignate(
as the (istance .et*een centers of the *el( increments an( must .e sho*n to the right of the length
(imension 3fig+ 7,24+
e+ $ermination of Intermittent #esistance Seam &el(ing+ &hen intermittent resistance seam *el(ing is use(
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.y itself- the sym.ol in(icates that increments are locate( at the en(s of the (imensione( length+ &hen use(
.et*een continuous resistance seam *el(ing- the sym.ol in(icates that s'aces e/ual to the 'itch minus the
length of one increment are left at the en(s of the (imensional length+ Se'arate sym.ols must .e use( for
intermittent an( continuous resistance seam *el(ing *hen the t*o are com.ine(+
f+ Flush "roection &el(e( Points+ &hen the e'ose( surface of one mem.er of a 'roection *el(e( oint isto .e ma(e flush- that surface shall .e in(icate( .y a((ing the flush contour sym.ol 3fig+ 7,74 to the *el(
sym.ol- o.ser)ing the usual location significance 3fig+ 7,N4+
7-786 PR/BE$T+/0 WE(DS
a+ General+
34 &hen using 'roection *el(ing- the s'ot *el( sym.ol must .e use( *ith the 'roection *el(ing 'rocess
reference in the tail of the *el(ing sym.ol+ $he s'ot *el( sym.ol must .e centere( on the reference line+
3;4 Em.ossments on the arro* si(e mem.er of a oint for 'roection *el(ing shall .e in(icate( .y 'lacing the
*el( sym.ol on the si(e of the reference line to*ar( the rea(er 3fig+ 7,;4+
374 Em.ossment on the other si(e mem.er of a oint for 'roection *el(ing shall .e in(icate( .y 'lacing the
*el( sym.ol on the ,si(e of the reference line a*ay from the rea(er 3fig+ 7,74+
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(+ @um.er of "roection &el(s+ &hen a (efinite num.er of 'roection *el(s is (esire( in a certain oint- the
num.er shall .e sho*n in 'arentheses 3F- fig+ 7,4+
e+ Etent of "roection &el(ing+ &hen the 'roection *el(ing eten(s less than the (istance .et*een a.ru't
changes in the (irection of the *el(ing or less than the full length of the oint- the etent shall .e
(imensione( 3fig+ 7,4+
f+ Flush #esistance Seam &el(e( Points+ &hen the e'ose( surface of one mem.er of a resistance seam
*el(e( oint is to .e flush- that surface shall .e in(icate( .y a((ing the flush contour sym.ol 3fig+ 7,74 to the
*el( sym.ol- o.ser)ing the usual location significance 3fig+ 7,4+
7-796 #(AS" /R :PSET WE(DS
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a+ General+ Flash or u'set *el( sym.ols ha)e no arro* si(e or other si(e significance in themsel)es-
although su''lementary sym.ols use( in conunction *ith then may ha)e such significance+ $he *el(
sym.ols for flash or u'set *el(ing must .e centere( on the reference line+ Dimensions nee( not .e sho*n
on the *el(ing sym.ol+
.+ Surface Contour of Flash or >'set &el(s+ $he contour sym.ols 3fig+ 7,74 for flash or u'set *el(s 3fig+ 7,
24 are in(icate( in the same manner as that for fillet *el(s 3'aragra'h 7,;4+
content 'ro)i(e( .y US Army Ordnance Center and School R