I N TE RN ATI ON S TAN AL D ARD I N TE RN ATI ON AL ORG AN I ZATI ON FOR S TAN OAROl Z4 Tl ON4 f E E n YH APOf i H AR I n d u stri al Cas q u e s Fi rst safety d e prot ect i o n ed i ti on - po u r OP r AH M AU Af i n0 CTAH LI AP TA3 AU AA~ ORG AN I S ATI ON I N TE RN ATI ON ALED E N ORM ALI S ATI ON h el met s I ’ i n d u st ri e 77- - Gi U DC 61 89 0 Ref N o I S0 73 - 7 ( E) I= m c; m Descri ptors : acci d en t preven t i on , prot ecti on from fal l i n g bod i es, safety d evi ces, h e l met s, speci fi cati on s ii Pri ce base d on pag e s F O R E WO R D I S0 of (th e I n t e rn at i o n al n at i o n al I n t e rn at i o n al member up h as D raf t th e ri g h t an d by be h as b e e n the carri e d a S t an d ar d s I S0 for I S0 s af e t y Th e th rou g h for on t h at in a by wi t h th e by 3873 - th e wa s d r awn Pro t e ct i ve in Au g u s t member up cl o t h i n g t ake part by an d Te ch n i cal bod i es of th e f o l l o wi n g co u n t ri e s ci rcu l at e d S we d e n M exi co S wi t z e rl an d De n m ark N e t h e r l an d s Tu r ke y Fr an c e New G erm an y N o r wa y U S S R H u n g ary P o l an d Yu g o s l avi a I ran Ro man i a Sou t h of the f o l l o wi n g Ze al an d Af ri ca, co u n t ry U n i ted Re p wa s St an d ard i z at i o n , 977 Ki n g d o m of expres s ed : Org an i z at i o n f o r an d : Bu l g ar i a i n S wi t z e r l an d wo r k Co m m i t t ee eq u i pmen t, S p n I n t e rn at i o n al the I n t e rn at i o n al I t al y bo d y in ar e as I s rae l g rou n d s set o r g an i z at i o n s , co m m i t t e e s acc e p t an c e E ve r y h as be e n Au s t ral i a member Pr i n t e d co m m i t t e e s , Au s t ri a t e ch n i cal d e ve l o p i n g 75 Bel g i u m al s o f e d e rat i o n of co m m i t t e e I n t e rn at i o n al I S O, t h ei r wo r k t e ch n i cal t e ch n i cal bef ore Th e t e ch n i cal co m m i t t e e l i s o n ad o p t e d I S0 wh i ch ap p r o val bo d i es I re l an d on ou t i s a wo r l d wi d e bo d i e s ) Co u n ci l member ap p r o ve d S t an d ar d i z at i o n ) member s u b j e ct n o n - g o ve r n m e n t al , P e r s o n al to fo r ( I S0 re pres e n t e d S t an d ar d 4, ci rcu l at e d in bod i es th e I n t e rn at i o n al I S O/ TC It to member St an d ar d s is i n t e re s t e d I n t e rn at i o n al the i n s t i t u t es S t an d ar d s bod y g o ve r n m e n t al to Org an i z at i o n s t an d ar d s d i s ap p ro val of th e d ocu men t I N TERN ATI ON AL I n du stri al I S0 STAN D ARD safety I n tern ati on al perfo rman ce St an d ard req u i remen ts, req u i remen t s for speci fi es met h o d s i n du stri al ( E) h el mets S COP E Th i s 873 - 977 safet y of ph ysi cal t est an d an d h el met accessori es pu rpo ses s u ch d rawl ace an d as : ch i n An y ad d i ti on al strap, at t ach men t n e ck part s for protector, d evi ces for speci al n ape st rap, an d cabl e l amp marki n g h el met s weari n g of th e h ei g h t : h ead ban d Verti cal to th e d i st an ce h i g h est from poi n t th e of l ower th e ed g e h ead or h ead form FI ELD Th e OF APP LI CATI ON man d at o ry u se in req u i remen t s i n d u stry men t s are appl y Ad d i ti on al i n cl u d ed to to opti on al appl y on l y h el met s for g en eral perfo rman ce wh e re req u i re- speci fi cal l y of verti cal th e an d : th e Verti cal i n si d e d i stan ce of th e be t we en th e top sh el l cal l ed for 1 h ori zon tal th e h ead ban d part cl earan ce h ead fo rm of th e cl earan ce an d i n si d e th e of : H ori zon tal i n si d e th e of th e d i st an ce sh el l or an y bet wee n protru d i n g sh el l D EFI N I TI ON S th e safet y u pper h efmet part of : A h el met a wearer’ s pri mari l y h ead i n t en d ed ag n st to PH YSI CAL a bl o w sh el l provi d es 3 : Th e th e peak h ard , g en eral : A smoot h l y form of perman en t th e fi n i sh ed materi al th at h el met ext en si on RE QU I RE M E N TS protect Reco mmen d at i o n s are of th e sh el l abo ve th e Materi al s g i ven in for an n ex Gen eral g en eral si d erati on of materi al s g en eral si d erati on of st ru c- B stru ct i on eyes Reco mmen d at i o n s ti on bri m h arn es s th e : h el met may A ri m : of Th e a th e th e compl ete i s mai n tai n ed provi d e exampl e su rrou n d i n g in mean s of fol l owi n g posi ti on by on absorbi n g mean s th e h ead , en erg y It of h ead ban d h ead at th e crad l e part s of th e : Th e part th e sku l l bas e of an d wh i ch si st s for : : Th e h arn es s cu sh i on i n g fi xed in : of Sh el l Th e sh el l sh al l h arn es s ad j u stabl e wi th Materi al to th e su rrou n d i n g ass embl y th e of th e h ead i mprove excl u d e mean s hi ghl y an t i - cu ssi on abso rb t apes : sh al l be Th e Su pporti n g absorpti on of ki n eti c : en erg y Materi al d u ri n g straps wh i ch ven ti l ati on permi t ci rcu l ati on h ol es of r : H o l es i n si d e tri bu ti n g an to h el met in th e a stren g t h at i n crease in an y sh el l h arn ess bu t as possi bl e poi n t t h i ckn ess d o es an d Th i s d o es or excl u d e ri bs oth er rei n forcemen t sh al l an d be smoo th l y fi n i sh ed an d al l ed g es rou n d ed th e of spect acl es fron t ed g e or of th e sh el l sh al l n ot preven t g og g l es sh el l cl earan ce measu red u n d er cl earan ce t h an 50 sh al l th e be d i t i on s n ot l ess stat ed t h an 25 in mm th e an d n ot mm th e i mpact provi d ed th e B u n i form th e at Verti cal Wh e n Wh e n an n ex rei n forced g rad u al su rface profi l e as att ach i n g s mo o t h verti cal pad d i n g in comfort s h o ck protecti ve h ave a for weari n g more g i ven speci al l y l ocal i zed ou ter 4 be Th e th e weari n g sh al l n ot n ot th e or t act for are wh i ch or h el met s sh el l as sembl y i tems of to H ori zon tal meas u red h ori zon tal more cl earan ce t h an u n d er cl earan ce 20 th e sh al l be d i ti on s n ot l ess st at ed t h an in mm th e an d n ot mm I S0 873 - 977 Weari n g Wh e n ( E) h ei g h t measu red weari n g h ei g h t u n d er sh al l be th e n ot d i ti on s l ess t h an st at ed in th e Lateral Wh e n t est ed l ateral : an d th e for h el mets mo u n t ed on h ead form D 85 mm for h el mets mo u n t ed on h ead form G H el met s cl med 90 mm for h el mets mo u n t ed on h ead form K fact on th e wi th th e mas s of a compl ete accessori es, th e n earest 30 g, h el met , exceed s 40 sh al l s h o wn be i n cl u d i n g g, th i s on h arn es s mass , a bu t TEST g i ven h el met d eformati on to l abel meet sh al l th i s at t ach ed in sh al l th e n ot n ot th e 40 excee d req u i remen t to maxi mu m exceed sh al l h el met, in mm, mm state th i s acco rd an ce RE QU I RE M E N TS l abel at t ach ed to Sampl es h el met H el met s sh al l t h ey h ol es in P E RFORM AN CE Man d at o i y No RE QU I RE M E N TS h el met th at for for set of Sh o ck absorpti on t est ed by t emperatu res th e met h o d an d tran smi tted to d ecel erati on of h ead form th e in moi st in th e g i ven kg at l ow th e d i ti on s, sh al l n ot stri ker exceed sh al l n ot an d 5, hi gh - Res i st an ce Wh e n th e to h el met th e poi n t excee d or th e of 00g r, pen etrati on is th e t est ed 20 t est ed sh el l sh al l peri od of stri ker th e h el met s sh al l th e by sh al l th e met h o d n ot co n t act g i ven th e in wi t h el apsed g i ven th e after temperat u re for th e materi al of emi ssi on in of fl ame after th e fl ame removal of th e a th e to fact on th e wi t h to l abel l o wered in pen etrati on req u i remen ts cl med meet of t h ese at t ach ed to in I acco rd an ce an d req u i remen t s th e to - acco rd an ce h el met, 20 wi t h ‘ C, wi th 6 respecti vel y sh al l in El ectri cal stat e sh al l n ot th e exceed I,2 met h o d Th i s req u i remen t vo l t ag es of req u i remen t h el met, in sh al l s ampl es be req u i red : in th e up to at - ‘C ( or at absorpt i on test in moi st absorpti on test at - I - 50 ‘ C, th en for resi stan ce to pen etrat i on test for el ectri cal h el met for l ateral h el met for th e i n su l ati on ri g i d i ty test test; test; for resi stan ce to pen etrati on at temperatu re sh al l be th e si d es r t est s for be cabi n et su ffi ci en tl y posi ti on ed It testi n g so sh al l l arg e th at be t h ey fi tted to en su re wi t h n ot a t h at t o u ch fan to th e on e h el mets an oth er provi d e or effecti ve ci rcu l ati on acco rd an ce 2 Pre- d i ti on i n g h el met s sh al l l eakag e cu rren t protecti on from a be of 5% 20 before d i ti on i n g precon d i ti on ed + ‘C for an d appl yi n g a at l east rel ati ve th e d ays h u mi d i ty fol l owi n g at a of i n di vi d u al treatmen ts mA is sh al l test test; h el met can 65 g i ven s h o ck Con d i ti on i n g Th i s testi n g of th i s i n su l ati on by for h el met t emperat u re t est ed to n u mber s h o ck fl ammabi l i ty Con d i t i on i n g Al l Wh e n su bj ect ed absorpti on absorpt i on s h o ck for h el met l ow t emperatu re s h o ck resi st an ce H el met s 2 an y of t est s d i ti on i n g meet of 6, su rface req u i remen t s t est ed for met h od bu rn s h as Lo w Wi t h an d by Opti on al been mi n i mu m i s as fol l ows for h el met for resi st an ce n ot at t ach men t “C) ; Opti on al Fl ame Wh e n of in req u i si te d i ti on s; h ead form me an s d i ti on an y t ests h el met th e th e force kN ot h er in i n cl u d i n g req u i remen ts Wh e n Th e test s testi n g sal e, pu rpo ses h as sal e for for an d speci al Man d at ory I su bmi t ted offered sh el l , for offered on e be are th e acces sori es th e d et ermi n ed wh i ch met h o d of M as s th e th e resi d u al mm wi th ou t to by d eformati on 80 If ri i i di ty i n t en d ed 440 st ate acco rd an ce V th i s wi t h to H el met s fact on en su re cl med th e l abel to meet at t ach ed to th i s th e Lo w Th e - ( see t emperat u re h el met f ‘C ) sh al l for th e n ot be l ess expo s ed t h an temperatu re sh al l to h Wh e n be a temperat u re especi al l y red u ced to - of req u i red 20 + “C I SO3 873 - 977 - Th e Hi gh temperatu re h el met for sh al l a peri od of be n ot A expo s ed l ess t h an to a t emperatu re of 50 f ‘C stri ker, stri ki n g h ead fo rm h th e so a mas s 48 th at i ts an d a mi n i mu m of mm 5, axi s so + rad i u s, t, ’ kg sh al l be coi n ci d es th at it may retard ati on wi th be from an d a h emi sph eri cal posi ti on ed th e d ropped th e abo ve verti cal in th e axi s g u i d ed of fal l g u i d es Moi stu re Th e Th e h el met sh al l be s prayed extern al l y wi th wat er i mpact force + ‘C at th e rate of I /mi n for n ot l ess t h an fi rml y meter Th e Con st ru ct i o n fi rml y at t ach ed th at sys t em wi t h ou t fl at H ead f o rms meas u red to by th e a base, n on - i n erti al or by an force accel ero- i ts to axi s th e is stri ker co- axi al It wi th sh al l th e be pat h so of th e stri ker H ead f o rms be at tach ed h posi ti on ed sh al l at t ran sd u cer 20 of h ead form wi th h avi n g face ( E) u se d in th e t est s sh al l be ei th er h ard wo o d of measu remen t d i storti on forces freq u en cy u s ed of res pon s e up sh al l to 40 wi th i n be abl e kN to an d % measu re sh al l h ave bet ween a an d or 000 Hz It sh ou l d be n o t ed th at, wh ere a force t ran sd u cer metal is Th e profi l e fi g u res abo ve an d referen ce th e l i ne referen ce an d may th e be l i ne tabl e sh al l Th e vari ed to be as d efi n ed profi l e su i t in bel o w th e th e met h o d of u s ed an d in i ts j u n ct i on mo u n t form accel erometer of th e is wi t h part u s ed measu ri n g of in th e th e th e h ead form, measu ri n g stri ker, th e h ead form syst em; th e stri ker wh ere forms an part syst em mou n t i n g - Th ese N OTE A correspon d reco mmen d ed h ead fo rms to h ead fo rms met h o d i s g i ven in D, of an n ex G an d K ofl SO/R 51 st ru ct i n g wo o d e n A Test Each be of th e Sel ecti on of si ze wi t h appropri ate to th e H el met s th e ad j u stabl e h ead form mi d d l e si ze wi t h h arn es s es as of th e sel ect ed si ze of sh al l by ad j u stmen t n on - ad j u stabl e appropri ate be t est ed ad j u sti n g on th e th e h arn es s ran g e h arn ess es th e of it sh al l be t est ed on possi bl e cro wn h ead fo rm of Veri fi cati on of cl earan ces an d weari n g 000 from h ei g h t si d e Verti cal sh al l an d be h ori zon tal measu red posi ti on on th e wi t h ad j u stabl e h arn esses, an d h ead form si ze of weari n g in For sh al l be h ead fo rm absorpt i on weari n g h el mets mad e wi th on A to th e of th e maxi mu m force h el meted h ead form, maxi mu m d ecel erati on th e t ran smi tted or of by th e th e d i rect to a meas u remen t ri g i dl y mo u n t ed meas u remen t of th e bas e su ffi ci en tl y bl ow It su i tabl y of th e l arg e sh al l to h ave i n stal l ed to apparat u s offer a sh al l fu l l mas s obvi ate on h ead fo rm th e base sh al l be ri g i d l y be force stri ker mad e of i mpact fal l a of of th e 50 h ei g h t be sh el l th e d i ameter cen t re en erg y sh al l h el met mm th e from th e th e a on of an d to J of meas u red th e u n d er- al l owi n g th e d etermi n ati on of i mpact th e a su i tabl e h ead form d etecti on be test i s al l owed to sh al l to fal l freel y h ead fo rm be of sh ou l d co n t act after t act, rest ored be resi stan ce of at th e l east retu rn mon ol i th i c to 50 th e a by if metal th e on to Th e a h el met t act abl e th at stri ker wi l l secu rel y su rface read i l y o ccu r, an d of permi t th at can n eces sary kg an d h as t h e M as s : 3, An g l e of mo u n t ed in a verti cal i fol l owi n g ilo ch aracteri st i cs : kg an d effect co mpressi o n stri ker of sh al l th e be Rad i u s of poi n t poi n t : 60 ” : 0, mm wave Mi n i mu m Th e of g reat est cl earan ce stri ker Apparat u s Th e of fal l i n g on total h ead ban d fal l an secu rel y, i ts Apparat u s test Th e to wi t h h ei g h t i mpact sh al l Pen et rati on fast en ed by th e at stri ker maxi mu m 6 measu red Th e a i n serti on stri ker of wi t h d i ti on i n g fast en ed 3) sh al l i ts test is mm record i n g th e A absorpti on th e an d ( see al l owed sh el l th e wi t h bo th appropri ate Pri n ci pl e Sh o ck h el met poi n t th e be in h ei g h t th e 6 ran g e an d mo u n t ed meas u remen t s smal l est ad j u stmen t Sh o ck h el met appropri ate th e l arg est cl earan ce, th e f from bet wee n by speci fi ed acco rd an ce fi rml y, an d mm sh al l by th e of th e attai n ed pl aced h ei g h t stri ker in h ead form meas u red Th e h el met s remo val be weari n g approxi mat el y rod i ts appropri ate h ead form sh al l sampl e appropri atel y mi n at mo sph ere on H el met s req u i si te d i ti on ed Wi th i n pro ced u re h ei g h t of co n e : 40 mm posi ti on H ard n es s of ti p : be t we en 50 an d 45 Rockwel l h ard n ess I S0 873 - 977 6 Test ( E) of proced u re appropri at e t h en Th e h el met th e wo rs t of i ts sh al l resu l t removal pl aced h ead fo rm a th e of total IO s h o ck th e an d ( 3) d i ti on ed th e from at i ts mm an d th e d i ti on i n g of man n er tests on possi bl e 1 it mi n sh al l h ei g h t mm by mm th e A an d bet ween th e 30 si ze fi l l ed Th e wi th bel o w th e tai n er th e sod i u m pl an e in an d th e ch l ori d e wh i ch th e h el met sh al l sol u ti on , bri m is to up co n n ect ed to sh el l be appropri ate weari n g meas u red g ave Wi th i n th e approxi matel y h ead form, th at at mo sph ere secu rel y, g reatest th e d i ameter in absorpti on fast en ed cl earan ce h ead ban d a in fi rml y, wi t h be be i n serti on vol tag ! , 200 at 50 an d to el ect rod e i mmersed th e el ectrod e ot h er sh al l i od l i n earl y V be g rad u al l y 60 Hz, in th e in be i n si d e tai n er for mi n wi th i n appl i ed sol u ti on th e mai n t n ed i n creasi n g sh al l Th e an d m i n th e an h el met maxi mu m th e to be t we en an d vol tag e l eakag e cu rren t measu red Th e stri ker h el met, a sh al l wi th i n d i stan ce h el met or stri ker is t aken of mm of bu t a If pri or a s u bseq u en t Fl ammabi l i ty to fal l on of 00 mm measu red th e bu t a free or t op of th e of t op stri ker i mpact th e th rou g h of m ay of t act is ch e ck mad e may sh al l be su rface fal l Th e h el met sh al l t wo g u i d ed paral l el bet ween be on be Th e veri fi ed mad e sh al l test s h o ck th e restored h el met l i es sh al l be test ou t at 50 on th e h el met u s ed for th e ‘ C so th at 30 s Apparat u s Th e bu rn er wi th be mm a Bu n s en d i ameter bu rn er bore, an su i tabl e for ad j u stabl e d i st an ce an appropri ate si ze trol Th e u s ed 95 g as of j et; d evi ce sh al l be th e an d s ys t e m sh al l Test Th e h avi n g sh al l be as measu red bl u e sh al l co n e be is approxi matel y Wi t h th e th e by 00 h el met of mm tan g en ti al Th e th e from to sh el l ad j u st ed cl earl y to be th e appl i ed su bj ect ed be th e pl ates pl ates a by N 30 ( maxi mu m An ri g h t be per s, wi th th e i ni ti al After measu red mi n u te after l ateral bri m an g l es, pressu re sh al l 00 for t h at at l ateral pl ates h el d so as possi bl e th e to th e acco rd an ce pl ates pl ates to i n creased in th e to up wh i ch th e d eformat i on ) measu red sh al l 30 d i st an ce ven t be d ecreased N, wh i ch bet wee n to sh al l th e 25 be N an d h el d pl at es t h en for 30 i mmed i atel y s, ( resi d u al after wh i ch d eformat i on ) ag n be measu red Measu remen t s sh al l be mad e to the an d i n corporat e mi l l i metre, an d th e exten t of d amag e, if an y, sh al l a be n ot ed pu ri ty M ARKI N G of ad j u sted to 43 Pa Marki n g s th e th e sh al l be at d o wn , of of th e al th ou g h an d th e an y cro wn , t est me an s r ven t so tu rbu l en t, t h at an d is th i s fl ame su i tabl e for poi n t th e a sh al l exami n ed sh al l be poi n t peri od be for bu rn er an g l ed at in removed , a i n su l ati on test h el met sh al l g /l bet ween wi ped , to compl y Stan d ard th e fol l owi n g wi th sh al l th e be req u i remen ts vi si bl y i n formati on an d of d u rabl y : appl i ed to bet ween of s 50 Th e s after N u mbe r of th i s be sol u ti on I O an d an d pl aced of 30 pl aced for b) Co u n t ry of ori g i n cl N am e i d en ti fi cati on d) Year e) Type s od i u m ‘ C Th e u psi d e h an d of before ch l ori d e h el met d o wn in St an d ard - I S0 3873 or mark of th e man u fact u rer pl an e removal 24 I n tern ati on al th e h ori zon tal fl ami n g a) 45’ A testi n g h el met cl med wi th sh al l co mpl et e temperatu re h el met I n tern ati on al marked fl ame El ectri cal th e l on g en d sh el l , th e by on man o met er rad i u sed pro pan e r a mi n i mu m a su i tabl e d efi n ed , mm u psi d e verti cal , ou t si d e be be t we en a tap pro pan e pressu re mmH , O) , fl ame th e Th e is sh al l be to be t we en bet wee n bet ween force Every Th e ear) ed g es proced u re g as ( 350 th e to l ower % to sh al l ag n n earest pressu re ( ear th ei r pre- d i ti on ed be h el met wh i ch i n creased sh al l a tran sversel y h avi n g as cl o se sh al l d i st an ce force sh al l g as, be pl aced bu t N th e th e th e t est ed pl ates sh al l 30 N, Th e I of sh al l be t h en ou tsi d e, Th e carri ed test an d force t est absorpti on test mm 2, 43 Th e ri g i di ty a g u i d ed to Co n t act th e Lateral th e fal l n ot n eces s ary th e d i ameter, Th e s peed h ead form ph ysi cal to from stri ker th e wh et h er th e su rface t h atof t act to area g u i d ed an d el ectri cal l y + poi n t be eq u al stri ker al l owed 000 th e may sh al l N ote th e of to freel y be a ci rcu l ar sh al l at q u arter of h el met marked Add i ti on al l abel in of man u fact u re ( man u fact u rer’ s on bot h th e d esi g n ati on ) sh el l an d th e Th i s h arn ess i n formati on sh al l fol l owi n g be th e at tach ed l an g u ag e of to th e each h el met co u n t ry of stati n g sal e th e : a t h en a t n er be an d a) “For ad j u st ed ad eq u at e to th e si ze protecti on of th e th i s u ser’ s h el met h ead mu st fi t or be I S0 Th i s h el met parti al is mad e to d estru cti on h arn ess , an d or eve n abso rb th e d amag e th ou g h en erg y of th e sh el l to s u ch d amag e a bl o w an d m ay n ot by b) Th e c) Th e read i l y apparen t , Th e h el met su bj ect ed to severe atten ti on of of or th e u sers h el met ” is al so an y of d rawn th e to th e ori g i n al e xceed s 40 g See be opti on al marked req u i remen ts compl i ed wi th Th ese as : i mpact ‘I - removi n g th i s be be repl aced mod i fyi n g parts an y if ( El th e may sh o u l d mass , 873 977 d an g er of 20 “d LJ f OC ” for for th e th e l ow l ateral temperatu re ri g i di ty req u i remen t; req u i remen t; co mpo n en t “440 V” for th e el ectri cal i n su l ati on req u i remen t I S0 873 - 977 ( E) Verti cal D at u m axi s referen ce l evel s I ”” For see d i men si on th e above l i ne 85 h, Profi l e m ay tabl e bel ow be me t h o d FI G U RE of - referen ce am e n d e d to l i ne I su i t mou n t i n g H ead form el evati on s Fron t Rear For pol ar h ori zon tal th e Referen ce secti on s, tabl e l i ne FI G U RE co- ord i n ates - H ori zon tal h al f- secti on s at d at u m l evel s of see I SO3 873 - 77 TABLE - Pol ar co- ord i n ates of h ori zon tal h al f- secti on s of h ead forms l ettered D, G an d K Di me n si on s H ead form D - Di me n s i o n h = in mi l l i met res 94, 3o” 5O ( E) 45” 60” 75” 90” 5” 20” 35” 5o” 5” 80” 93 91 88 81 74, 71 71 74 78 84 89 92 93 91 89, 87 81 74 71 71 74 78 84 89, 92 92, 05 O 0” 35O 5o” 65’ 80” 20 40 50 60 70 80 85 90 H ead fo rm G - Di men si on h = 99 I Dat u m o5 5” 30” 45” 60” 75” 90” l evel 97, 95, 93 85 79 76 76 78 83 88, 94 97 97, 20 95 94 92 85, 79, 76 76 78 83 88 94 96 97 40 90 89 88 83 77 745 74 76 81 86 91 92 92 50 86 86 85 79, 74 71 71 73, 78, 83, 87, 88, 88 60 80, 80 79, 74 70 66 66 68, 73 78 82 82 82, 70 71 71 71 67 62, 60 59 61 , 66 71 , 74, 75 75 80 57, 57 57, 55 52 50 50 53 57 62 65 65 65 85 48 48 48 47 45 44 44 46 50 55, 59 59 59 90 37 37 37 36 36 36 36 38 42 48 50 51 51 95 21 21 21 22 23 24 24 26 29 34 38 39 39, 05” 20” 35” 50 ” H e ad form K Dat u m - Di me n s i o n h 04 o0 5” l evel = ’ 30” I T 45” 60” 75” 9o ” 97 90 84 81 , 81 83 98, 99 97 90 84 81 , 81 83 98 95 95, 93 87 82 79 79 81 95 50 91 , 91 90 84 79 76 76, 79 92, 60 86 86 85 79 74 72 72, 75 86 70 77, 77 77 73 68 66 66 68 80 67 67 67 65, 60, 58 57, 59, 72 59 59 59, 58 55 53 52 54 66 50 50 50 47 45 45 47, 60 39 39 39 38 36 37, 39 52 52, 52, 25 25 26 26 25 26 39 41 41 02, 20 00, 40 01 I 25 ! i I S0 873 - 977 ( El AN N E X RE C OM M E N D E D Each a h ead fo rm d en si t y % of is Abo ve t h i ckn esses ou tl i n es g rai n th e from th e th e by at l i n e, l ayers d i men si on s from profi l e is are in to h avi n g cu t Th e of materi al s d u rabl e u n d erg o ag ei n g is u s ed of th e n ormal l y i e pro d u ct s th e For su i tabi l i ty u n d er of the ski n i n to mu st i rri tati on i ts to u se to t ran sverse dri l l i n g th e h ead fo rm sh ou l d th e pol i sh bu t a or u se h r) be For n ot so u g h t i n fl u en ce th e rai n , of t h o se wi t h materi al s materi al sh ou l d su n , effect s wh i ch in col d , parts d u st , or of of kn o wn u se, AN D st ru ct i on form of su rface an d SO h ard ( i e on e n ecess ary t h at wh en Th e a n ot tested smo o t h rei n forci n g of th e h el met sh el l h avi n g wh i ch can ad d i ti on al more in of a be mean s th e acco rd an ce profi l e ri bs t h an th e sh ou l d to ad vi ce Th e h el met i mpact al l smoot h l y t raversed of th i s h el met fi n i sh ed wi t h ou t absorbi n g prescri bed wi t h essen ti al l y force I n tern ati on al sh el l d o es a seal ed may wi th several an d by cen tre u n ti l be marki n g pi ece i ts press sh api n g s crewed by e ach t h rou g h in an d th e Th e gl ue h as u n d ert aken co at s of Th e sh el l ac Wh e re su spen si o n d evi ce h ead ban d an d g i ven to pen etrati on rou n d th at i n t en d ed OF at th e d amag e wearer d o wn appropri at e, or th e th e g i ve H E LM ETS pad d i n g sh el l t est protecti on th e h o wever, m ay so poi n t to t h at be s o me req u i red protecti on i s effecti ve ag n st h ead ban d l evel t ype of bet ween th e i d en ti cal wi t h el sewh ere An y d evi ces t h ey are even t fi tted u n l i kel y of an or s u ch to th e to acci d en t ot h er In ri g i d as mi g h t h el met cau s e sh ou l d an y i n j u ry parti cu l ar th e t h ere proj ecti on s cau s e be s o to on d esi g n ed wearer sh ou l d th e i n si d e th at in be of th e no th e i n j u ry th e ou t er No part of th e h el met sh o u l d h ave sh arp protru d i n g ed g es ch eck) i mpact is in is an d metal l i c u se be h el d fi n al be on h ol e CON S TRU CTI ON h el met Th e is th e g l u ed faci l i tated axe s d i ameter h ead form are is th e th e ski n , are g en eral of h el met s we at th e before be l ayers B M ATERI ALS n ot Th e assembl y l on g i tu d i n al smal l wh e n sh ou l d wh i ch an d a h ard en ed , sh ou l d th e mou n t i n g ass embl ed su i t H E AD FORM S Accu rat e th e h el mets to to ski n , t act n ot of of th e TH E ch aract eri sti cs ( exposu re wi th co mi n g man u factu rers th ei r ci rcu ms t an ces t act appl i ed h arn es s man u fact u re al terati on su bj ected vi brati on s, as to th e appreci abl e or cau s e in q u al i ty, WOOD E N tabl e, to FOR met h od t og eth er to AN N E X RE COM M E N D ATI ON S OF Bel ow th e l ayer opti on al of pl an ed are reco mmen d ed are CON S TRU CTI ON t en t an d g i ven l ayer OF h ard wo o d moi stu re l evel s proced u re an d of a th e d at u m 90” s am e t h i ckn esses l ayers kg /ma referen ce d i spl aced l i ne from up 72 mat ch pl otted referen ce l ayer to th e to bei n g bu i l t 640 M E TH OD A en erg y t ran smi tted Wh e re it sti tch i n g sh o u l d be is u se d prot ect ed to secu re ag n st th e h arn ess to th e sh el l , abrasi on St an d ard n ot excl u d e No part bei n g of easi l y th e s h ock- abso rbi n g mod i fi ed by th e d evi ce u ser, sh ou l d be capabl e of