Bsi bs au 029 1964 (2000)

BRITISH STANDARD AUTOMOBILE SERIES BS AU 29 1964 (Supersedes S M M T Standard No 53) Specification for Drawbar eyes and forecarriage pins for connection between trailers of 5 35 tons gross weight and[.]

BRITISH STANDARD AUTOMOBILE SERIES

(Super sed es S.M.M.T

Sta nd a r d No.5 )

U C 6 9.1 0 3.5:6 9.1 0 3.8

This Bri shStan ard, ha ing

b en a pro ed b the

Automo ileIn ustry Stan ards

Commi e an en or ed b

theChairman of the Eng ine ring

Divisional Cou cil,was

publishedu der the authoriy

ofthe General Cou cil of

theInst uton on

1 Ju e1 6

© BSI 0 -2 0

The folowing BSI reference

relates to the work on this

stan ard:

Commi e reference AUE/

-Am endm ents is ued sinc publ cation

Pag e

Fig ure 1 — Fixed d rawb r ey e an forecar iag e pins 1

This BritishStand ard which is publshed u d er the authority of the Automobie

Industry Stand rds Commit e of the BSI, is b sed upon d ata she t

SMMT5 :19 7 of the Society of Motor Man facturer an Tra er Ltd The

req uirements of this stand ard , which relate only to v ehicles used on the publc

hig hway s, are intended to ensure the ma imum deg re of inter hang ea i ty

betwe n commer ial an Gov ernment dep rtment an Serv ices stand rd s

The material specifications are for the minimum qual ties ac epta le, and do not

exclude the use of other materials prov id ed that these are at least eq ual in q ual ty

so that roa safety is not imp ired

This stand ard should be used in conju ction with the folowing

BritishStand rd s:

a) for towing ho ks BS AU25

1)

and BS AU27

2)

b) for towing jaws BS AU 26

3)

an BS AU28

4)

The stand rd a pl es to con ections to trai er not exce ding14 and3 tons g ros

weig ht The specification for drawb r ey es an forecar iag e pins for connections

to traier of2 –5 tons g ros weig ht is g iv en in BS AU24

5)

N T If i is re uired to conv ert the fig ures in this stan ard fom Bri sh u is into metric u is i

is recommen ed that the conv r ion factor an ta les contained in BS3 0,“Conver sion factor s a d

ta ble ”, b used.Attenton is also drawn to BS2 5 ,“Pr ecis conver sion of inch a d metr ic sizes on

en ine r in d r awin s”

A British Stand ard d oes not purport to includ e al the neces ary prov isions of a

contract User of British Stand rd s are responsible for their cor ect a plcation

Com pl anc with a British Standard does not ofitself confer im m unity

f om leg al o l g ations

Sum mary of pag es

This document comprises a f ont cov er, an insid e font cov er, p g esi andi ,

p g es1 and2 an a b ck cov er

This stand rd has be n up ated ( se copy rig ht d ate) an ma hav e ha

amendments incorporated This wi l be indicated in the amendment ta le on the

inside f ont cov er

1)

BS AU2 , “Towin ho k for us betwe n tr aier s of5– 4 tons gr os weig t a d towin vehicle”

2)

BS AU 2 , “Towin ho k for us betwe n tr aier s of5–3 tons gr os weig t a d towin vehicle”

3)

BS AU2 ,“Towin jaw for us betwe n tr aier s of5– 4 tons gr os weig t a d towin vehicle”

4)

BS AU2 ,“Towin jaw for us betwe n tr aier s of5–35 tons gr os weig t a d towin vehicle”

5)

BS AU2 ,“Towin con e tons for tr aier s of2–5 tons gr os weig t

1 Scope

This BritishStand rd specifies the b sic

dimensions and qualty of materials for drawb r

ey es and forecar iag e pins for use in con ections

betwe n towing v ehicles and :

a) trai er not exce ding14 tons g ros weig ht

b) trai er not exce ding3 tons g ros weig ht

The g ros weig hts refer to g ros la en train weig hts

where more than one traier is drawn

2 Materia ls

The q ualty of the materials used in construction

shal be at least eq ual to the folowing :

a) Drawb r ey es

i Traier not exce ding14 tons g ros weig ht:

BS51 6)

wroug ht iron, Gra e A, or BS9 0

7)

En3A

i ) Traier not exce d ing3 tons g ros weig ht:

BS9 0 7)

En3A

b) Forecar iag e pins BS 9 0

7)

En3A

Dimensions shal be as shown in the Ta le and

Fig ure 1

NOT The dimensions sp cified are calculated on the b sis of

the total yield streng th of the p rts of the drawb r b ing e ual to

two thirds of the g ros weig ht b ing towed.I is neces ary that

any other p rts con ectng the trailer to the towing v hicle not

co ered this stan ard, shal b at le st e ual in streng th

4 Desig n

a) Efectiv e means shal be prov ided to prev ent

endwise mov ement of the forecar iag e pin

b) I the d rawb r ey e is ar ang ed to swiv el, stops

should be prov ided lmiting the ang ular

mov ement to15° either side of the horiz ntal

( se Fig ure 2)

6)

BS 5 , “Wr ou ht ir on for gener al en ine r in pur pos s (Gr ad es A, B , C a d D )”

7)

BS 9 0, “Wr ou ht stels in the for m of bar s, bi ets, a d for gin s,up to6in r uln scton, for a utomo ie a d gener al

en ine r in pur pos s En sr ie”

Fig ure 1 — Fixed drawbar eye and fore ar iag e pins Fig ure 2 — Alternative

swiveling eye

TRAIL R g ros

weig ht m axim um

a

inside

diam ete

A

diam ete of

se tion

B

diam ete P

( n d uble shear)

m inim um

a

The trailer g ros weig ht in icated in the fir t column is the ma imum towed weig ht,

whether consistng f one or more trailer.Care should b taken to ensure that the

combined g ros weig ht of the trailer towed b any p rtcular drawb r e e or

forecar iag e pin do s not e ce d the g ros weig ht for which the drawb r e e or

forecar iag e pin is desig ned

b

3 9 Chiswick Hig h Roa

London

W 4 4AL

BSI is the independent national bod y responsible for prep ring

BritishStand ard s It presents the UK v iew on stand ard s in Europe an at the

international lev el It is incorporated b Roy al Charter

Revisions

BritishStand ards are up ated b amendment or rev ision User of

BritishStand ard s should make sure that they pos es the latest amendments or

editions

It is the constant aim of BSI to improv e the qual ty of our products and serv ices

W e would be g rateful if any one find ing an inac uracy or ambig uity whi e using

this BritishStand rd would inform the Sec etary of the technical commit e

responsible, the identity of which can be fou d on the inside f ont cov er

Tel:0208 9 9 0 Fa :0208 9 7 0

BSI ofer member an indiv id ual up ating serv ice caled PLUS which ensures

that subs riber automaticaly receiv e the latest editions of stand rds

Buying standards

Order for al BSI, international an foreig n stand ard s publcations should be

a d res ed to Customer Serv ices Tel:0208 9 9 01 Fa :0208 9 7 01

In response to ord er for international stand rd s, it is BSI pol cy to sup ly the

BSI implementation of those that hav e be n publ shed as BritishStand rds,

unles otherwise requested

Inform ation on standards

BSI prov id es a wide rang e of information on national, European and

international stand rds throug h its Library and its Tech ical Help to Ex orter

Serv ice Various BSI electronic information serv ices are also av aia le which g iv e

d etais on al its prod ucts an serv ices Contact the Information Centre

Tel:0208 9 71 1 Fa :0208 9 7 4

Subs ribing member of BSI are kept up to d te with stand rd s dev elopments

and receiv e substantial d is ou ts on the pur hase price of stand rds For d etai s

of these and other benefits contact Member hip Ad ministration

Tel:0208 9 7 02 Fa :0208 9 7 01

Co yrig ht

Copy rig ht subsists in al BSI publcations BSI also holds the copy rig ht, in the

UK, of the publcations of the international stand ardization bod ies Except as

permit ed u der the Cop rig ht, Desig ns and Patents Act 19 8 no extract ma be

reproduced , stored in a retriev al sy stem or transmit ed in any form or b any

means – electronic, photocopy ing , recording or otherwise – without prior writ en

permis ion fom BSI

This do s not preclude the fe use, in the cour e of implementing the stand ard,

of neces ary detai s such as sy mbols, and siz , ty pe or g ra e d esig nations I these

d etais are to be used for any other purpose than implementation then the prior

writ en permis ion of BSI must be obtained

I permis ion is g ranted, the terms ma includ e roy alty p y ments or a lcensing

ag re ment Detais and a v ice can be obtained f om the Copy rig ht Manag er

Tel:0208 9 7 7