Arch Bridge Instructions - Black Bear Scale Models

ARCHBRIDGEJIG
Blrck Berr ConstructionComPanY
Po Ed 26911
{5ta 46'l+llxl
Autl4 T6.t
7rr5t{91l
AB-201x
Now you can build a great looking bridge withoti
worrying about building a iig! This Arch Brldge
Jlg is designedlor scals or dimensionalwood
AllBlsck Besr Co tlucdon Co. AssemblyJigs are
precisionq]l f|1)mdurableacrylic. Cut-outsprevent
glue joints from slictftg lo the iig and allowclsanup befoF the glue dries. Soap and water washofl
ihe gluethal doesgetonihe jig. Choppertemplate
(ppvided) makes it easy lo ctlt accuEts angles
Wid instructions help you visualize your train
tayoutwith this great addition.
(6.r3F)
ARCHBRIDGEWOODSIZES
FullSize
N (160:1)
HO (87:1)
s {64r)
O ft8:1)
9RIDGE WoodSize Beq'd WoodSize Reo'd WoodSize Reo'd WoodSize Reqd
1 2 :\ 1 !
t\12'
a'xa'
6'x 6'
3Et'3rc2"
1ll6'x3132'
1n6"\1t16"
1132"x11t6',
at
a'
34"
stgxllg
3192\3tg
150'
l5'
63"
1Aa3/16'
204'
21'
3/3211/8'
86',
12'Eactr t16'x916'
l6'Ebctr
3/16'x3/16"
273"
2g
115'
'IER
6"x l2'
16"DtA
flBWs
1t32\3t32"
aa
6'Each
1B\1/1"
2l'Ead'
: I.englhrcquirementincludes10%malginior error.
Notes
Construction
R€adinsnudionstErcughlybskrs be€inning
constudion.Youmaywanlb jumparolndwhilo$o gluois drying!
Wood.izos closolo tlo€6 sp€dfiodmayb6 us6d.Biassmall€rwoodb on6$d€o{ tle slotto mainbinallgnm.nt
Preslainsllwood. Goodcolo|sars Floa]ilstajns:Nanl|ElPins,OaL l/Unut,T€alq& Drjttwood.
UsowHrTEGLUElor constucton.solvonlb€€d dt€ (pl6lic 9h€, MEK,or.lyr€ne glus)nill drDagolho iig.
@ Copytight
BlackB€atCoNbuctonCo.19021993
PLANNING
YOURBRIDGELAYOUT
Tog€l f'o lnost out ol yow Arch Btdgo Jig. planon hildng s€v€|alArch Bddges.
You €n sting ih€m logeher €n+b€nd to d€b a BddSoS€ri€e.
Or, you can pul h€m tos€hsr in a curvod Seclion ot ts ck
or, )ou can put hrc€ side plateslog€lnerto lorm a sideby€ide Doubl. &idg€.
B€gsd€sq you will n€€d lo con{tdorhow u|€ bidgs tsmjnates al h6 Tr*k Apprcdh.
For additonaljd6as and d€lalls,f6iaf !o "ilodel Railbad Bddg€ and T16116",
lGlmbad Books,Mod€lRailroadHardb@k No. 33, KalmbadrPublishing,1992.
TheTrackApproach
Arch BridgeSeries
Tho oasiestwEy lo cr€ats a 6aios ot Arch Bidges ls lo a8s6,nbl6oadl s€c{on on l'1o
samopi..€ o, bottc'mc.hod. A! Step 1 ot tho AssemblyInsntlcdons,leavo$6 bonom
chod sdoldngout ot ho end6ol h6 jig. Wr€n on€ 6€cxonof bddg. is compleigd,
mov€ h6 bottomchod doi,vnsnd bulld lhe n.n s6odon. Cut he shoe6longonough
lo oov€l he span botw66ntls btldg$. Oh€r lyp6€ ol bndg€s,or a secdonol ltoste,
can b6 lns€dedb€lwe€ntle bddgosto crsste a r€elly hterccungafloo,l
It $o bddge is apprcachodby a !6sll€ or set ol
pl€rs.lhe pler or tesll€ underlhe Ehoeon tho
bddgewlll n€€d lo b€ shortd lhan t1e on6e In lhg
approach. Contnuo t16 bddq6sldnoeron ov6l flo
pl.l8 or lres{€8. RestU6son lt1oslrlng€ls. Blac€
DoubleBridge
Tl€o sid€ plalEsen b€ comblnodto hild a side.by.sidedoublob dge. ThEpler
jlgs 616ma(b to allowan 6xta long pl€r plalE!o bo us€d. Asssmbleono s6t ot
plgrson on6 6nd ol hs pior ph!g. Ihen tlip it aroundand gluo he Pj6B lo tl€
ohd €nd ot ho pior plaia. You will n6€d !o ctll longorioor bo€.msand c.oas
blao€€io b{lld he doubl€bidgg.
ArchBridgeon a Curve
no pl6r
It h€ bddgsls to ro€ton an €mbankm€nt,
or lrasto is Equircd. R€sthe 6hooon lho loPol
or rsbinlngwall. For simplldly,
h€ €mbankmont
youcqnlaylh€t-ackdlEctyon lhe iloorboarnsol
$6 bridge.
Tl€ designot ho Ad Bndgsalbws lt !o be u66dln a laiiy smallradus lum Tl€ drawhg
showsa 130scalo loot Edlus tum h €tandatdgau96. TIl€ bddg6mustbs wld€n€dlo allow
lor tho a.ldilionalinlid€ dsm@. Tho oubid€ lra.* is langontb n|6 originalstralghtuack
Use @N6d stingols Insloadol th6 slralgt on66snown. Rem€mbef,you must ort longor
ioor b€ms. cross bracos,and plet plal6 to bulldlh6 wicl€rbndgE.
I
01@ B?dl B6d c6.t'dts
cd
PAnT1 - ArchBridgeConslrucllon
l.3y 12x1?bottom chordinjig. Us€a piec€
rongerrhan you n€€d and let |t|e €nctssrick
out of h6 jig Cut sho€s to fir angt€d
podion ol slot. Cut the sho* trs same
bngm oubjd€ of h€ jig. CIh€ disbncg trom
rir6 ods6 ot lhe jig to h6 6ho€ angteare nor
he same d borh 6nds-) Build rwo (2)
bottom ciord somblies botorc staninq
conslrucljon ot h€ bridg€. For€ chord to
bo[bm ot slot wh.n glulng sho€ tn ptac€.
siarr brj{o sld€ ass€mblywlb hnd boltom
Cot 8xl2 vdticel p6L.
Pla@ in jig dd
glu€ to botiom chord. Do not lorco hs fi or
th€ bolbm dDrd rnay rcble oul ot poslton.
Pros€ho botlomc*iod nal aibr oach po6t ls
W1€hh€ supponsare ffhlsh€d,l6t tie a!€€mblydry tor a sev€ralmtnutos.Curard gtueh6
6x8dlcqonelbr.c€o uslngtha chopp.rblnplataas a gulde. CLtt016bonomsflushwih the
botomcol he boltomdDrd. Mlierthoiolntwh6rehs mtddt€bEcesm€€t. pdstdon$€ tops
ol the dl.goml br.c€. so a Nut-Bo[-Washer
(NBW]w tineupwt$ t|6 blac€and
6s6embty
the v€rucalpo€t Laya fratw€ighton ti€ alsonbtywhtt6h ts h $e ltg. Thlsw h6tphotd
,/']\
ffi
FFJ
\[,/
XV'A /-R\
Removetle slde a!€ombly lrom he jlg and
lay lt tlat on a pl€ce ol wax papd to dry
horoughly. Tum h6 assombt ovgl and
In6lalllha dlagonalbrac€6on he back slcle.
L.aya tlet welghl on he a&rsmblyb k€€p it
fat whll6 hs glu6 b drylng. Tdm away glu.
fa6h. Tim any dlsgonalbEo€s lhal exl€nd
below botlom chod. Rough up sny glue
sloss wlh a hobbyknife.
AAVA
I \-Yf I l.7/,'F\\\
Y-=g*]
V,I
)
\__,/
\jrl
Cul 8x8 hrco pl.lo., 3 long upp.r gu.!€|,
and low.r gu.r.l tom 6rA slock Us€ lhe
angle tor DIAGONAL BRAOE 1 on he
olopps templata lo cul lhe €nds ot he
lower guss€t, Cut s€veral 6xlra, Thgy a€
easy to los€. and lh€y may split wh€n
hstalllng h€ NBWS lat6r. Slah hs ti$hly
cul encls. Gltle he braco plal€B and upp6r
gu.€€b lo boh sld€s ol lhs ass€mbly.
Glue he end br.oo plale. firsl. Th€n rcst a
..' stalght €*o on |t|e ass€mblyio lln6 up lho
inneron6s. Glu6t|6lou€r glsrol la.t.
Cur 1Z\12 ro9 chod socrjons. Us€ th€
chopper lamplaleto 9€t aooural€angl€s cut
on t|e €nds. Bias sach seclid !o f'e lop of
lho slot. Mals $€ lit snuq wlt@ul tordng
h€ Doslsoul ol oosltion.
ffiw/
hstail l{Bw3 0n boh sides ol ass€mbtv.
Th6 ln6ld€ ot hs sld€ pl6to do€s not r6q!ii6
he NBW3 along he bottomohod. Out he
sl€m ol ho AW shod and ddll he holo
ove|slze so you & nol have !o torc€ tls
NBW intr ola.€.
InslallNBw' on guss€b. You havo now
complolddone sld€ aslambly. Retrm to
St€p1 andbulldh€ secondsld€assombly.
PART2 " PierConslructlon
llarou
Gaug€
s_|8nd5rd
caug6
Uso $e L.youl Pla|lning Gtiid6 to s€l6d
tis typs ot approadryou wsnt lf you do not
went to use pl6F you may stjp Part 2.
S€bd tr6 pi€r iig lo use bas€d on wn6u|6r
you ar€ buildng a sbdard gauge or nanow
gaugebndg€.
Use nold€s (r{ in jig io @t lsngh ot piq
rop pld. ttlm rad8 slod( Cur pieF trom
18" round slo€k and glue io pl€r top plata
ll your pi€rs slick ott t|6 .nd ot h€ jis loo far
us6 a w€ightto holdtle pl€ls fat.
Cut dd slu€ horkonrd pior braco and
di.Oonal pi€r bl:co from 6x12 stook Affsr
lhe gtu€ has s€t"up tuh he pi6| asssmbly
ov€r and glue hs bracason tE back si.l6.
@ BlackBear ConslructionCo. I 993
PART3-FinalAss€mbly
Cut crc63 br*€. trom 8x12 slock Use the
no!$6 in ho llg as a guide d€pondingol
wh€$er you ae buildinga narcw gaug€ of
sbndard 9au9e bddg6. Maks hE cros
brdc6 longer if lhs brjdg€ i
you aro msldnga sid€-by.{ttl6bri€e.
Tum |'16 sld6 asssmbllos uDsidodown on
spport5. B€ sw€ dley d€ lin€d up dd
s$lare. Bubb€. csmsnr wlll hold hings in
p|a€ lompo€rily. W€ights hung from h6
lop ohords (ao,fngas plumb bobs) will kssp
tt€ d.l6 llaias vodcal. Uno h6 cllods up
wfi t}E outsids pisrs ol lis pierass€mbly.
Glue h6 cro.3 br46 in placs. Eachcrcss
brac€ siould lin€ up wirl he @rospondjng
Tum he bndgo ov€r and glug tle two
ln
addlional bottom chod .!!dnbll6
plaoo. The chords should line up wllh lt1€
Inn6l plels on he pl€t assombly. Make lufo
tD tops ot S16chords are lln€d up so ire
flal
ffoorb€6mswlll 116
Cul 35 lloor b€qrnr trom8x12stock. Ih6 6n& shouldb€ flushwitr he outsldarol he
bottomdDrds. Fil four {4} beamsb€twe€neachpalrot vodcal poslswlh 12' dlrn€nslon
\,€ruc€|.Th6 ourd b€amsshouldb6 flushagajnstfl6 posrwlh th€ r€malnlng
wo bearns
€v€nlyspacsdin b€lw€.n. B€amst|at InlerteEwitl he Inngldlaoonalbra..s may€lher bo
dl shonb flt ilush againsllhg blaceor angledt !o fl arcundh6 braco. Tl€ b€amshal
intad€f6vJihh€ €nds€clionsol h6 lo! dlods snouldb€cutto ft aroundlhs *Drds.
Crrt ft6 lm€6 brec€ fom 6x8 stock and
cutsting€Blrorn 8x8 sbd< and glu. hem
in ph.€. Ihey should lin6 up wih lro
middo two botom chords and Yow tack
Us€ a socdon ot lack to cfi€d( t's
nNALLYI: lnstall 8W3 on t|s snds ot tne
cross brao€s. ToudFup ay fiEsh wood
wltl siajn. Inshll uls bndgs in your layout
and ath.h he bad( on top ol tl6 stingsrs.
CONGRATULATIONSI
Co.1993
fd) BlackBearConstruclion
Black Bear Construction Co.
P,OE6269ll
Austln,Tms 74755-0911
Arch BridgeChopperTemplate
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g
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s" .9
,ud
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Usetheseoutlinesasa gui-de
to cuttheKneeBraces.
:
:
:
N Scale
HOScale
S Scale
O Scale
Tips& Techniques
" Usethe choppertemplatelor makingthetop chordanddiagonalbraceanglecuts.
Note:Thewooddoesnot needto lie on thetemplateline. lt just needsto
be Darallel
to it.
'Mark the stockby notching
witha hobbyknife. Usea chopperfor the tinishcut.
* Youmayneedto finetunethe fit withmediumgrade
sandpaper
on a hardsurface.
- Whenyouare gluinga fresh piece
cut
of woodthatwillbe hardto get at later,
go aheadandstainthe endbeforegluing.
@ CopydghtBlackBearConstruc{ion
Co. 19921993