Upload
advocate
View
219
Download
1
Embed Size (px)
Citation preview
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
1/218
SING
Publ
icDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
2/218
1j
SINGEQUIPMENT'
MENT,
ember31,1941.
40,ischangedasfollows:
nt.a.Authorityforissue.Assault
ngineertroopsaspartoftheir organiza-
gineercombatbattalionandsquadron
mbatregiment(squaredivision),and
ts;eachcombatregiment(corps),30boats;
y,80boats.Thelightpontonunits are
.
(C1,Dec.31,1941.)
aultboat.
anizationalequipmentofengineertroops
ck
(C1,Dec.31,1941.)
8
(C1,Dec.31,1941.)
nmentofequipment.a.Bridge
e equipment,whichprovidesforthe
footbridge,consistsofthefollowing:
ter,galvanized,6by19,cast
chorcable),withreel2
(C1,Dec.31,1941.)
equipment.a.Duckboard.(1)
ne,consistsofaseries oftransverse
eTrainingCircularNo.1,WarDepartment,1941.
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
3/218
crosssection.Theweightofthe
proximately100pounds.Theslatsare
aintto giveanonskidsurface.
(C1,Dec.31,1941.)
ration.
e.
Onemanstandsinthewaternearthe
edbridge.Heattachesthe cable
upstreamendofthefirst floatand
ookson theupstreamendsofthe
ermanonshorepaysoutthe cable
eelturnsabouta stickmounted
sa pairofforkedsticksdriven
,theholdfastforthe cablewillbeat
evelofthewater,so thatitwillbe neces-
blei nthehooksoftwoor morefloatsat
ordertopreventthemfrom beingpulled
cableismadefastandtightened.When
t300pounds.
(C1,Dec.31,1941.)
cipalcomponentsofoneunitofthe
pontons,and thefloorsystemtransported
o-wheeltrailers,withcertainspare
eunitofequipageprovidesabout250
acityor 160feetof20-toncapacity.The
entsofoneunitofequipage.
(C1,Dec.31,1941.)
nisrectangular* * * fastened
ubdividedinto fourcompartmentsby
eswhichreachtoaheightof 9inchesbelow
hepontonconsistsof woodgratingsrest-
mribsystem.Cleatsare located* * *
Thirty-twoofthesefastenersareofa
pe.Eightadditionalfasteners,whichare
ovidedasspares andaresecuredtothe
at theycanbereadilymovedtoreplace
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
4/218
ers.Acarryingrail* * * andone
(C1,Dec.31,1941.)
stenersintheintervals4-5 and13-14shouldbeshownas
,model1938.
(C1,Dec.31,1941.)
upbeam* * * inthecolumnabove
completetrestle,lessthechainhoists,
(C1,Dec.31,1941.)
balk,4'3"shouldbe shownas4'9".
andsill.
(C1,Dec.31,1941.)
basicitemsofaunitofponton
onsixsemitrailerseachdrawnbya
26)and onfourtwo-wheeltrailers
otruck(see fig.27).Inaddition,
tors,eachofwhichistransported
ya4-toncargotruck.
(C1,Dec.31,1941.)
semitrailercarriesasprincipal
nbalk,and 32chess.Thebalkand
edofthesemitrailer.Thepontons
oneon topoftheother.Theyare
eel cablesdrawntautbyreeltype
ghteners.Eachcablehasaprotect-
of y2-inchsteamhose.
umatic-tired,heavyduty,fifth-
with aremovabletoolsandacces-
hcarriessuchauxiliary"bridge
hcables,oarlocks,pumps,siderail
fbeing towedunderfavorable
mumspeedof60 milesperhour.
kesandwithhand-operatedme-
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
5/218PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
6/218PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
7/218
bya 4-ton,four-wheeldrive
hacargobodywhichcarriesponton
ment,accessories,andspareparts.
(C1,Dec.31,1941.)
o-wheeltrailersaresimilarto
withthe10-tonpontonequipage,
.Theloadings(principalitems)
railersare loadedwith1trestle
and2sills each(seefig.28);the
dedwith 1trestle,complete,24
oat, each.
(C1,Dec.31,1941.)
ngtrailerhas abedwhichtilts
omoveonoroff thetrailerquickly
viatesthenecessityforauxiliary
(C1,Dec.31,1941.)
The4-ton,six-wheeldrivecargo
efour two-wheeltrailersofone
twotiltingtrailerscarryinglight
ngbed12feet 3incheslongde-
hestandardchess.Forty-eight
edoftwoofthe fourtruckspulling
(C1,Dec.31,1941.)
a.Eachsemitrailerisequipped
device.Ahand-operatedpump
ks,oneateachrearcornerofthe
ppedwitha2 Viz-inchdiameter
ongunwalesroll.The Jackshave
he pontonslOVginchesabovethe
thebottomponton restingonthe
dingpontons,theforwardendof
xiliaryroller, designedtoroll
sstoredtopmostbeneaththepon-
ottomponton.The rearendofthe
the hydraulicjacks.Thetwo
thereartoallowthe groundcrew
bottompontonon theground.The
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
8/218
ngementoftwo-wheeltrailer.
(C1,Dec.31,1941.)
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
9/218
sthefrontend ofthetwopontons
d forwardbyitsprimemover
ont endofthecombinedloadis
.
he firstpontonisplacedwiththe
emitrailerandrearendrestingon
ntonisthen slidintopositionon
9.)Theremainderofthe loading
ereverseofthe unloadingoperation.
(C1,Dec.31,1941.)
hp.motor.
water,theoutboardmotorshould
erinclineddownwarduntilall
mtheunderwaterexhaustsystem;
etintothe cylindersiftheexhaust
hardstarting evenifthemotoris
fthemotor isstored,serious
esult ifitis storedwitheither
ylinders.
(C1,Dec.31,1941.)
-hp.motor.
cludedin eachunitofpontonequipage,
nedto combatunitsandlightpontoncom-
oruse withthelightmotors.Asmall
ilesperhour instillwater.
(C1,Dec.31,1941.)
TION(executedasunderindividualin-
ethemselvesintheorderin whichthey
rightoarsman(strokeoar) takingthe
othersalternating,theeven numbers
instructorthendirectsoneortwo of
movethemoorings,andprepare topush
(Cl,Dec.31,1941.)
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
10/218PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
11/218
sandtrailers.a.Specialatten-
thetechnicalreconnaissanceof
testothe feasibilityofbringing
versapproximatelytothewater's
clearingatrailin advance.Under
onsthetwo-wheeltrailerscanbeun-
cksandpulledforwardtothe un-
ctor.Afterthetrailersare
dforbringingforwardother loads
alk,chess,etc.Itis alwaysdesir-
imemoverstobeable tobringboth
rwardalltheway tothebridge
ailers,andtrucksare unloaded,
sportationtoconcealedcoverat
sfromthebridgesite.
(C1,Dec.31,1941.)
al.Thissectioninstalls* * * by
.Thissectionwillnormallyrequirethe
AtthecommandCONSTRUCTTHE
sitsequipmenttothe siteoftheabutment.
eground,approximatelyhorizontal,per-
e bridge,withitscenteronthe center
itsnarrowfacesvertical.Ninepickets
versideofthesill, oneneareachendand
cedalongthesill. Twopicketsusually
re sideofthesill. Assoonasthe
l.
(C1,Dec.31,1941.)
allowwatermethod.
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
12/218PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
13/218
aidonitsside ontopofthe twotrestle
embledwiththetransominthis position.
achedtothefootofthe columns.One
shoeshouldbesecuredinthe eyeatthe
othershouldbe securedinthebottom
soonastheyareclearedbyraising the
.'(See fig.22.)One-halfinchsteel
totheshoesand anchoredtopickethold-
e trestlecolumnsfrom"kicking
avyloads.
(C1,Dec.31,1941.)
oassemblethedeepwatertrestle,* * *
trestleshoesareassembledtothe columns
he hookschainedtotheshoes.One-half
attachedtoshoes andanchoredto
sdescribedforthe shallowwater
inchlinesusedbythe siderailsection
onaremadefast, byclovehitchesattheir
mntops.Thefour * * * intheriver
(C1,Dec.31..1941.)
ess.Thechesslayersplacethem-
earshoreonthe baytobecovered,oneon
otheronbalk Nos.7and8.Theyreceive
andplace themonthebalk,shovingeach
cedingchess.Eachchesshastwoscore
alinedwiththealternateupstream
balkNos.1and 8.Referringto
arkswillbe alinedwiththedown-
1 and8ofodd-numberedfloating
medgesof balkNos.1and8 of
pans.Scoremarkswillbealinedon
efundamentalsenunciatedin
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
14/218
scarrierdelivershischesstothe chess
idgekeepingwell totherightof theroad-
y* * * whenthecallisagainmade.
(C1,Dec.31,1941.)
a.Todoublethecapacityofthenormal
ollows:
venadditionalbuoyancybyinterposing
eachpontonspan,thepontonbeing
of thechesstoholdit inplace.Thepon-
ithsufficientmen(or withwater)
ndfacilitatefloatingit underthe
(C1,Dec.31,1941.)
y.Thisraftconsistsoftwonormal
.It providesaplatform10%feetby
nofsixesclosedup soastodis-
overtheroadwayof theraft.
s.
(C1,Dec.31,1941.)
).Arevisionofthissectionwillbe
arisingfromtheadoptionofsemitrailers,
argotrucks(primemoversfortwo-wheel
(C1,Dec.31,1941.)
.
thecareandmaintenanceforthe
generallyprescribedformotorvehicles.
giventolubricationandtire inflation.
edfrequently,especiallywhengoinginto
eness.Whenthe trailersarestored,
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
15/218
Theclampingbeamsshouldneverbe used
egeneralrulesforcareandmain-
o-wheeltrailers.However,the
obebackedbytheir primemovers.
(C1,Dec.31,1941.)
pairstothe ponton.
ntvaryingdifficulties,dependingon
rtion.Minorcorrectionshavealready
orwhichthe toolssuppliedintheponton
ethodsofcorrectingmoreseriousdistor-
e 46.Inallthese cases* * * facili-
(C1,Dec.31,1941.)
ueboat
uipage,model1938l
transportationoflightpontonequipagewill necessitatemanychangesintableI.
ued.
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
16/218
ed
(C1,Dec. 31,1941.)
4-ton4by 4primemoversinoneunit ofbridge.)
bodies.
ds.
dsontop of
bodies.
obodies.
2trailer
rsinoar
e.
cargo
bodiesand
y.
ownoverload
gobodies.
horsincargo
00-foot
gobodies.
bodies.
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
17/218
dies.
eltrailers.
ads.
dies.
bodies.
obodies.
s.
trailers.
obodies.
dies
4truck
4truckcargo
trailers.
railers.
trailers.
(C1,Dec.31,1941.)
0).Rescinded.(Amanualfortheheavy
940,willbeissuedwhenavailable.)
(C1,Dec.31,1941.)
TARYOPWAR:
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
18/218
SINGEQUIPMENT
MENT,
ruary14,1942.
40,ischangedasfollows:
raft.
pontonbridgenormallywillbe
espanraftreinforced.Allrefer-
tainingtheretohereinwillconsider
nge silllocatedinthecenterof the
nconstructionwillreducethe
structedbridgetoabout214 feet.
chesswhichwillbeunusedasa
econsideredasspares.Asuggested
thereinforcedhingespanraftis as
TRUCTTHEBRIDGE,thebalkfastener
erailsection,securesthreepontons.
ngers,anddetachablebalkstir-
terpontonbyfourmenofthe balk
esepontonsisheldagainst and
omenofthesiderail section;the
ethe shorepontonbyfourmen
lightshore linestotheriver pon-
edownstream,areprocured,made
mainingtwomen ofthesiderail
sareusuallyspottednearand up-
t.Fourmenfromthebalk fastener
ontons.
heshorepontonreceivetheriver
pontonbalkfromthebalk carriers
balkfastenersintheriverponton
balkintheirproperplaceson the
eandpartiallytightenthefasteners.
rsengagedatthis time.
EOFF,givenbytheleaderof the
iverpontonispushed outintothe
until theshoreendsofthe balk
oper placesontheshoregunwale
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
19/218
SINGEQUIPMENTC2
enterof thecenterpontonisthen
he balk.(Duringtheshovingoff
ereafterduringtheconstructionof
keptonline andmaneuveredby
nsofthe temporaryshorelines
anddownstreamendsoftheriver
sheldto theshorebyhand.As
ownstreamanchorlinesare de-
onthelight shorelinesarecoiled
ncommissionedofficerinchargeof
fthebalkareengagedat their
onsproperlyalined,detachable
the balknearbothgunwalesofthe
asteners,andthenallbalk fasteners
andtightened.
redpontonbalkarereceivedfrom
ndfastenedintheir properplaces.
kstirrupsareplacedoneacheven-
nwalesofthecenterpontonand
dethecenterpontonapproximately
k.Hangersaremadefasttoall balk
dgesite.If theraftisto beem-
deepwatertrestle,threeadditional
s placedontopofand perpendicu-
hecenterofthe centerponton.Two
balkNos.1and2, theotherbetween
endedshorewardabout5feetand
he shoregunwaleoftheriverpon-
hetrestle israisedclearofthe
xtra pontonbalkareremovedand
idge.)
(C2,Feb.14,1942.)
TARYOFWAR:
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
20/218
SINGEQUIPMENT
MENT,
ember18,1942.
40,ischangedasfollows:
cing.Trestlebracingisdesignedto
etrestle spansofthe10-tonpontonbridge.
sentiallyofbracingstruts,22-footsectionsof
whichareclampedtothecolumnsofthetrestle
mistablefoundations,itisdesirabletocon-
singlediagonalbracingwithoneend ofthe
of theshorewardtrestlecolumnandthe
ewaterlevelon thenextriverwardtrestle
dations,itisdesirabletomakean integral
bracing.Twostrutsareutilizedon each
hisso shapedthatitmaybe screwedinto
e endofeachstrut.Thetwo strutsare
ottomtosecurea firmbearing.Theyareso
romabove,theyareapproximatelyatright
a45 anglewiththeaxisofthe bridge.
C3,Dec.18,1942.)
TARYOFWAR:
INGOFFICE:1943
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
21/218
RDEPARTMENT,
NorrmTirr1,/.9f).
SINGEQUIPMENT
oftheChiefofEngineers
10-23
model193824-102
3-ton,model1924103-110
1-132
calmanualisdesignedtosupplyall
thevariousstandardtypesofstream-
ooutlineconstructionprocedure.Tactical
directlyaffectingthetechniqueofputting
enot developed.
sgivenforthe organizationofwork-
ualassemblyanderectionofequipment
ecessarytoconformtounusualconditions.
htheportablebridges ofH-10and
eparedwithoutbenefitofmorethanlimited
wotypesofequipmenthavenotyetbeen
cetests.Changeswillbepublishedwith
equipmentdevelopedasappeardesirable.
parturesandmodificationsinprocedure
ouldbereportedto theChiefofEngineers
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
22/218
fequipment2
3
uipment4
ment5
ent(i
on7
S
ltboat9
eof equipment.a.Transportof
assaultboatisdesignedtocarrythetroops
ombatwavesacrossanunfordableriver
d.Theconstructionofeventhesimplest
arilybestarteduntil securityhasbeen
edhostilesmallarmsfire.Therefore,
osedrivercrossingtheleading assault
ablishthebridgehead,mustbelandedon
annerotherthan bybridges.Small
ghmaneuverability,whichmaybeeasily
havebeendemonstratedasthemosteffec-
theseforemostwavesofthecovering
ssessingthesecharacteristics,aswellas
itability,hasbeenadoptedas anarticle
pment.
ardassaultboat.Thesmall,light
apacityisadaptedtothe firststagesofa
rietyofconditions.Thatdegreeofsur-
o thealwayshazardousoperationoffirst
edbyanalert enemymaybemuchbetter
saultboatsthanbythatof rafts,locally
es,orpontonsusedasferries.Groups
ught totheriverbank,launchedandloaded,
withmuchless likelihoodofapprisingthe
derwaythancaneither footbridgesor
rmitcrossingonawidefront,and sodo
sdofootbridges.Pontonsalsopermit
sing,buttheyare muchmoredifficultto
maneuverinthewaterthanassaultboats.
onsasferries isliabletoresult inserious
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
23/218
SINGEQUIPMENT
rselyaffectingthelatprconstructionof
conjunctionwithothercrossingequip-
boatsforcarryingtheleadingwavesacross
loymentoffootbridges,orpontonsand
oat.
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
24/218
S'
utmakesit possibletodelayutilization
ablemeansofgreatercapacityuntilthe
heenemybankandthus assuredsomepro-
onanduse.Assaultboatsarenormally
pplementingtheotherformsofequipment
ouse,untiladequatefacilitiesforthecross-
bridges) havebeencompletely
nt.a.Authorityforissue.As-
to engineertroopsaspartoftheir organi-
engineercombatbattalionandsquadronis
batregiment(squaredivision),andarmored
ombatregiment(corps),30boats;eachlight
ts.Thelightpontonunitsarethe chief
saultboatsareissuedtothe engineer
onthebasisof normalneeds,andadditional
eedwill bemadeavailablebyhigher
ssionofthecapacityoftheboat,see
quipment.a.Generaldesignfea-
ofconventionalskifftype,withflatbot-
nsom,andmoderateoverhangatbowand
eprofilelengthis about13feet6inches
othetopof thetransom,andthemini-
oot 8inches.Theweightofthe hull
Theframes(usedonthebottomonly)
heplankingand bottomareofanim-
dfirplywood,whichisunaffectedbymois-
maple,andahickorycarryingrail
ofthegunwaleand aroundthecornersofthe
ybereinforcedbymeansofa removable
achmentofan outboardmotor,asshown
gesofstem,chine,andtransomends,are
luminumangle-stripsrivetedto the
eof thebottomiscoveredbyaflooring of
ames,whilestrip skids,alsoofoak,run
sideofthebottomforprotectionduring
hboatisequippedwith sevencanoepad-
the standardshadeofolivedrab.
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
25/218
SSINGEQUIPMENT4
assaultboat.(The oarryingmildocsmilextendacrossthe
el.)
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
26/218
S
out5inchesoffreeboardamidships,
eboatis approximately3,000pounds.
will safelycarryanyofthefollowing
0machinegun withtripod,and13
0machinegunwith tripod,and4boxes
ardmotorattachedtotransomofassaultboat.
un(model1916) onitsmount,and4
37-mmantitankgunonpneumatictires
mortar,and50 roundsofammunition.
pmentoftheadvancedechelonofthe
nicationsection.
wo-manengineercrewreducesthese
ensofaras theInfantryisconcerned.
pment.a.Carefulhandlingneces-
edto beaslightas possible,theassault
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
27/218
SINGEQUIPMENT5
edthanthe heaviertypesofsmallboats
ever,quitestanchlyframed,andtheply-
eofconsiderablestrength.Thusthe boat
nts,butshouldstillbehandledwith care
ainingoperationswhennoelementof
edfromthe interiorbypumpingor
beenbeached,bygentleandgradual
ewateroveronegunwale.Theboatshould
ningwater.
tothebottomorsides canreadilybe
dtotheoutsideof thehull.Inpractice,
beenfoundverysatisfactoryforeffecting
eningofregularshape,square,or
oodtofittightlyinthe enlarged
ches(pontonrepairkit)of the
ocovertheenlargedopeningand
iling.
lacealuminumpatches,oneonout-
inplace.
deofsheetmetal,preferablycopper,laid
andfastenedwithshinglenailsclinched
esshouldbereplaced.Bulletholesmay
thwadsofclothor paper,pegs,adhesive
yissueolivedrabpaintis satisfactory
arein thewaterforshortperiodsnly.
s,andthesearesowellprotectedby metal
rialin whichtheyarelaid,thatrecaulk-
sary.However,whenitdoesappearad-
ecaulkingcompoundshouldbeused.
verbeusedona small,lightboat.It
soaktheboatbeforeuse.
setheboatsshould bekeptundercover,
eather.Beforebeingplacedinstoragefor
atsshouldbe driedout,cleaned,inspected,
tedif necessary.Ifstoragespaceis
edinsmall stacksafterthebottomofthe
ehasbeencarefullychockedupin such
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
28/218
circulationofairandto supportthehull
ment.Theallaroundoverhangof
hemto facilitatetheirtransport.Ten
ardloadfor boththe1%-toninfantry
nengineerdumptruck.Normally,the
eexceeded,butin anemergencyasmany
arriedby thedumptruck.However,the
10boats becomestopheavyandunstable,
oatsof theloadbecomespossiblebecause
ondumptruckwithnormalloadoftenassaultboats.
posedweight.Consequently,whenitis
ultboatloadof greaterthanthestandard
perlysecuredandthetruckdrivenwith
wbodiesandhighsides, itmaybe
oadin orderthatthegunwalesofthe
onthesidesandtherebysupport thewhole
tion.a.Finalassemblyareas.
aredesignatedinthe ordersforastream
seassemblypointstheassaultboatsare
final carrybyhandtothe launching
herethe engineercrewsareassignedto
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
29/218
SINGEQUIPMENT7
thearrivalof theinfantrytroopsofthe
rceintheirmovementforwardfrom
broughttothefinalassemblyareasby
roadnet, andtherequirementsofsecrecy
loadtheboatsanddistributethem along
rsothattheymay bereadilypickedupby
boatiscarriedby theinfantrymenwho
ompaniedbythetwo-manengineercrew.
characteristicsofthefinalassembly
ghtinthe reconnaissancepreliminaryto
forthecrossing,are
ks(orcarryingparties)bringing up
stilegroundandaerialobservation.
tionwith,numerouseasilyfollowed
crossingfronts."
he fronttoallowbothfor crossing
rontandforproceedingdirectlyandwithout
points.''-?
tionfromsuchenemyrifle andartillery
eventhoughsecrecymaybepreserved.
Thetwoengineersoldiers,habitually
oatascrew,supervisethe finalapproach
andloading oftheboats,andall move-
gineerpersonnelis chargedwiththe
mentoftheboats,fromthe timethecarry-
gersgoesforwardfrom thefinalassembly
thdrawnfromuseupontheestablishment
alassemblyareatothe river.(1)The
ultwavecarrythe boatfromthefinalassem-
erthedirectionoftheengineercrew.The
sinchargeof themovementfollowsclose
niedbythemanincommandofthe infantry
ersoldieractsasguideat theheadofthe
boat.
ulesshouldbe observedduringthe
shouldattempttocarrytheboat at
than4shouldbeused forevenashortcarry.
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
30/218
parturefromtheassemblyareauntil
verbank isreached,theforwardmove-
shouldbe generallyuninterrupted.Mo-
eenroute topermitthechangingof
rial detectionthroughmovementwhen
hstopsshould befewandbrief.Ashort
nearedgeofthewaterfor theloading
ns.
ncarryingposition.
bethemostdirectpracticablerouteto
entsalongthenearbank,orin thewater,
redangerousandshpuldbeavoided.
ardfromthe assemblyareashould
ntial,for thebunchingofcolumnsona
ersedroutesmay bedisastrous;route
dispensable.
mencefromthevariousassemblyareas
ethatallboatsof thefirstwavewillbe
ythesamemoment,withoutdelayatthe
rikingthe sidesorbottomsofthe
oudly,andthereforegreatcaremust
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
31/218
SINGEQUIPMENT
bepreserved.Nothingwhatevershould
ngthehandcarry.Kiflesshouldbe slung
mtheboat andthebuttsnotallowedto
th.Atthemostconvenientcarryingheight
ebottomoftheboatandthe groundisnot
ceeveryprecautionmustbetakento
ks,andotherobstructionswiththeboat,
frombeing droppedordraggedonthe
csketchillustratingtypicalmovementofassaultboatsfromfinal
gfront,andfirstround tripafterbeinglaunched.(Notto
(1)Immediatelyuponarrivalatthe
angeinthecarryingformation,theboat
ewateruntila depthsufficienttofloat
ached.Ammunition,machineguns,and
uipmentarefirstquietly placedinthe
en,the passengersmoveaboard,keeping
oidingthe noisewhichwillcertainlybe
tof theboatwithheavyfootgear,weapons,
er,caremustbe exercisedtoprevent
,withitsattendantnoiseand delay,is
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
32/218
histime.Oneengineersoldierstations
bow;the other,whocommandstheboat,
n balanceandthatpaddlersareproperly
gaboardhimselfatthesternand then
oshoveoff.
ng,shouldkneelon theonekneenearer
paddlerstoeachside.Otherpassengers
erior oftheboat,holdingtheirrifles
withtotalloadoftenmen andequipment.
ewaterisdeepclosetothe bank,the
oweredorslid fromthebanktothe water.
lleltothebankat bowandsternbythe
ddirectlyfromthebank.Ropelashings
willassist inthis.
h.boatstartsacrossassoonasloaded
possible,and bythemostdirectroute,to
mptshouldbemadeto maintainformation
ater,althoughintervalsbetweenboats
ertainextent.Neithershould anyeffort
hatupstreamin.orderto counteractdrift,
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
33/218
SINGEQUIPMENT
soflandingand embarkationpointsand
ve ledtopriorand explicitorderstosuch
fcompletedarkness,orofheavyfogor
onoftheboatmaybe mostreadilymaintained
mpass.
eirpaddles awayfromthecarrying
void thesoundsofscrapingorstriking
lsobe avoided.Passengersshouldnot
eboatshouldneverbe attemptedand
bitedbeforedeparturefromassembly
eparedto unslingpacksandbeltsand
tofcapsizing.
disembarkingfromassaultboats.
urnofboats.(1)Uponarrivalatthe far
intained,unlesstheenemyhasdiscovered
re.Theboatshould notbebeachedexcept
seistobe avoided.Paddlesarelaidon
assengersstepintothewateror directly
y.Anycargoisunloaded.Controlofthe
otheircombatleaders.
promptlypaddlesbackfora second
cabletoreturnboatsatnightor
dunderfire,to thepointfromwhich
hecurrentis atallswift.Therefore,
ats fromdriftingdownstreamhasbeen
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
34/218
S
besuccessfullymade,allboatswillarrive
ndoftheround tripacertaindistance
re.Hence,theinitialcrossingfront
avesafterthe firstmaycrossatpoints
nstreamandstillaccordwiththeplanof
Theamountofdriftduring eachround
dvance.
uldfollowthefirstfromtheassembly
insuretheirarrivalat thebankjustprior
Thelocationsofthereturningboats
approacheddirectlysothatmovement
eunnecessary.
dassault boatequipmentattachedto
crossingnormallyreverttoengineer
antryunit(less thepersonnelandve-
rbyother means)hasbeentransported
ng.Ifnotconfusedanddelayedby
ssault boatwaveshouldcrosseach200feet
boutfiveminuteswherethetotalwidthis
metakenfor themovementfromassembly
will varywiththeterrain,thedistance,
andwillbe greaterforthefirstgroups
s.Thespeedof thismovementshouldbe
ngproperallowanceforthedelaysimposed
thecrossingwillusuallybe made)andthe
e,inorderthat thefirstwavemayarriveat
ntintended.
aultboat.a.Purpose.Toferry
vercrossing.
anizationalequipmentofengineer
ron10
division)orarmoredbat-
30
120
ck
ytontruck.
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
35/218
SINGEQUIPMENT9
ipment9
r.46.)
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
36/218
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
37/218
SINGEQUIPMENT10-12
priseactionbutconstitutetheleastvul-
incasethe operationisdiscovered.When
ssecuredafootholdsufficientto prevent
tomaticweaponsonbridgesites,thecon-
mberoffootbridgeswillpermitamore
passageoffoottroops.
beenextendedsufficientlytoprevent
nthesites,the constructionoflightponton
rtillery,other arms,andtrainsare
nmentofequipment.a.Bridge
heequipment,whichprovidesforthe
footbridge,consistsofthefollowing:
oothandle2
s32
meter,30-footlengths,with
thends(bridle lines)36
meter,500-footlengths(hand-
meter,750-footlengths(guy
ter,galvanized,6by19,cast
atcable),withreel2
ter,galvanized,6by19,cast
atcable),withreel2
nit(or bay)ofthefootbridgecomprises
,andtwohandrailposts.Thereare36 such
teunitof thebridge.
ridgeis issuedtoeachengineercombat
nitsareassignedtoeachlight ponton
equipment.a.Duckboard.(1)
ne,consistsofaseries oftransverseslats,
ntwolongitudinalstringers,12 feetlong.
hmaterial,andthestringersare 1%
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
38/218
tion.Theweightoftheduckboard,complete,
ds.
hedtotheunder sideofthestringersfor
erpositionwhen thebridgeisassembled.
cesectionsofthebridge,areattachedto
teningsatthe endsofthestringers.There
lefasteningateachendofeachduckboard.
malefasteningbetweenthetwospring
ning,untilthelug isgrippedandheldby
effectstheconnection.Thefasteningsmay
thefitting atthetopof thehandrailpost,
onnectors.
eholein theduckboardslatorcrosspiecedi-
fastening,mayberotateduntiltheleavesof
edopensufficientlytoreleasethe maillug
white-pinecrate,10feetlongand
s-section.Thecratecontainslayersofex-
cementofwhichaffordsbuoyancytothe
t100poundsand willsupportabout
nementofthe duckboardstringers
thefloatcrate.Foldingcarryinghandles,
launching,areprovidedateachendof
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
39/218
SINGEQUIPMENT
formed,theduckboardsaresecuredto
g fastenerswhichareattachedtothetop
ed shanksthatmaybehookedovereach
oatsareprovidedwithhooksateach
lemaybeplaced.
onnector,latched.
erattachedtoduckboard.
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
40/218
minumhandrailposthasatthetop A
sbothasa receiverforthehandrailline
ngtheduckboardfasteners.Thepostis
dstringerjustinsidethe floatsofeachbay
ottomofthe post.Twopostsperbay
natecornerof theduckboard.
nchorcableandbridlelines,as wellas
entdirectlytotheendsofthebridge,serve
uiding thebridgeduringconstruction
stenedI
ttachedtochickixmrd
nwhileinuse. Thefloatcableprevents
eamendsofthefloatsunder theactionof
slistedinparagraph11 areforuseas
anchoringandguyingthebridgevary
gth ofthebridge,asindicatedin
uipment.a.General.Allpartsof
arefullyinspectedatappropriateintervals,
oredawayforan extendedperiod.Any
houldberepairedor replaced,andall
dgreasedasrequired.Awell-ventilated
usedforstoringtheequipment.Floats
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
41/218
SINGEQUIPMENT13
keptfromcontactwiththegroundand
lationthroughthestacks.Standardolive
aintingthepartsofthe equipment
eoftheduckboardfastenersandthe
refullyavoidedindisassemblingthebridge.
of damageinthedismantlingoperationif
thebridge whileitisstill afloat.Indis-
remainderofthebridge,thelug onthe
houldbeusedonlyas akeytoseparatethe
epost aboutitsaxisthroughanangle of
culty,separationshouldbe accomplished
parts ratherthanbyanyattemptto
hebridge apartwiththehandrailposts
ndamageto boththefloorboardsand
toroftheearliertype,model1935,of
vice,isthepart oftheduckboardmost
torrepair.Thespringsteel leavesofthe
eapproximatelyparallelwhenconnection
soiftheleaves,whennot connected,in-
sucha waythatthereispositivecontact
erendsonly.These leavesmay,however,
entsothattheyare parallelordivergebe-
g; ineithersuchconditiontheywill not
ctoryconnection.Leavesnotincorrect
dtoproperconditionbyplacingthe duck-
ga driftpinintothe groundagainst
dbetweenthetwoleaves,andthentying
dpullingso astosecureapermanentset
mount.Theotherleafmaythenbeset
emanner.
rubberwhichistheprincipalbuoyant
bjecttodamagebyexposuretoexcessive
atsshouldnotbestoredindoorsnextto
oroutdoorsin thesunduringperiodsof
ceptwhencovered.Whenexposedout-
careshouldbetakento avoidaheatab-
asablackbituminousortar road.The
ubberboardsbecomebrittleintime.
surfacewilltendtoacceleratesuchdeterio-
oughtheywill havenoeffectuponits
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
42/218
ERS)
erialmaybepuncturedbybulletsor other
blereductioninbuoyancy.Draggingthe
ermittingcollisionwith sharpprojections
thefloats aswellasthe expandedrubber
ded.Duringassemblyofthe bridge
out intowaterinwhichtheywill float
heyshouldbe pickedupwhilestillafloat.
stenersforconnectingthefloatstothe duck-
bythespring clipsprovidedforthepur-
yinuse-Thesefastenersshouldbekept
ed,dried,andoiled beforethefloatsare
ndrailpostsarenotdesignedfor usas
otbeused assuch.(Seepar.136(1).)
keptdryandcleanandshould becare-
oiledbeforestoring.Theharnesssnapson
obe cleaned,dried,andoiledbefore
eshouldbetakentoavoidkinkingthe
eendsofthecableto holdfasts,asuitable
securedwiththe cableclipsprovided.
nfasteningeitherend,andthe formation
d ofthecableshouldbeavoided.Thecable
stat thefarshoremostquicklyandwith
ageto thecablebyattachingtotheside of
ap which,whenengagedintherunningend
herturningofthe reel.Aftersnapping
eelmaybecarriedaroundthe holdfastthree
andingendofthecable,andfinallyboth
eelitselfthrownoverthecable.The cable
ndthoroughlyoiledbeforestoring.
pment.Thestandardloadfora
bridge,aquarterofthe 432-footunit.
equiredto transportasinglecomplete
ybesomewhatexceededinemergency,
thsofbridge maybecarriedintrucksof
.Technical.Thetechnicalrequire-
re asfollows:
h, orotherdefinitelineof approachto
cilitatecarryingoftheequipmenttothe
chofinfantrytroopstothebridge.
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
43/218
SINGEQUIPMENT15-16
thenearshore,eitherflat orwitha
totheedge ofthewater,largeenoughin
e baysandtheconvenientpilingofthe
rshorenotmorethanwaist deep,but
loatthebridgeandso facilitatethecon-
stothecompletedportionofthe bridge.
especiallyonthenear shore,andof
edetheconstructionofthe bridgeand
sturdytreesorotherusableanchorages
chorandfloatcablesand guylinesmaybe
toprepareholdfasts.Suchnaturalanchor-
onthefar bank,fortheanchorandfloat
nk,for theguylines.
calstandpointitisdesirablethatthe
ntsmostsuitabletotheschemeof
celine,orsimilarfeatureroughlypar-
will facilitatereorganization,control,
ertheir crossingandengagement.
rtilleryobservationposts,orother
ts.
ntinclosevicinityfortroopsimmediately
ootbridgesites,andthebestapproach
edaftercarefulreconnaissanceandwith
andtacticallydesirablefeatures.Dataas
thestream,whichareaffordedbythe
basisofthedecisiontouseanchorand float
nstruction.a.Normalmethod
Ordinarilythemostrapid,effective,and
structionisbysuccessivebays.Bythis
ccessivelyassembledandconnectedto
completedportionofthebridge,whichis
othe wateradistanceequaltothe length
onstructionthecompletedportionof
andalinedby guylinesorananchorcable,
uire.
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
44/218
's.Thebridgemaybeconstructedina
exceptthatsectionsoftwoormorebays
ofthenormalmethod)areassembled
thecompletedportionofthebridge.
equiresmoreworkingroom,moremen,
nizationandtraining,thandoes the
structionis,however,morerapidthanthat
bridge.Underparticularlyfavorable
andapproach,thebridgemaybeassembled
yhand,andlaunchedin asingleunitas
gehas scarcelyanylateralandlittle
er,andthismethodbecomesimpracticable
terizethesite,orwhenbrush,trees,or rough
themethodpracticableoverswiftor
nlandwillordinarilybelimited tothe
onofthebridge acrossanarrowandslug-
enthenbesubjectto favorablesite
enthestreamis wideorthecurrentswift,
arybothforconstructingthebridge and
terithasbeenbuilt. Thiscableiscon-
le lines.Underconditionsrequiringthe
efloat cablealsoisrequired,exceptfor
thetable in(2)below.Thefloatcable
heendsofthe floatsprovidedforthe
upstreamendsofthe floatsfromsub-
rningthebridgewhenthebridge islong
erlesssevereconditionsonlythe guy
ebankarerequired,toaline thebridge
secureitonceit hasbeencompleted.
variouscableandguylineaids, accord-
urrentvelocity,isoutlinedinthefollowing
esgivenarethoseprevailingin themain
edataincludedreferto thefootbridge
dge,seepar.22.)
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
45/218
SSINGEQUIPMENT
es
or
ation.a.Movementtothebridge
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
46/218
ootbridgeusinganchorcable,bridlelines,and floatcable.
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
47/218
SINGEQUIPMENT
orfootbridgeconstructionmustin-
dingofequipmentandits issuetocarry-
versoractualoperationsthisworkshould
nareassecurefromhostile observation,
rytroopsconcerned.
ootbridgeusingguylines only.
utedfor carrybyhandapproximately
15-20perman
ngth1man
2men
th2men
ngth4men
ired tocarry,withoutrelief,asingle
e.
about300yards,provisionforperiodic
ade.Thefloatswillprovethemostdifficult
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
48/218
find itnecesarytostopand change
e.(1)Asthehandtransportedloads
horewherethebridgeis tobeconstructed,
rrangedandpiledi nconvenientorder.
one side,cluckboardsontheother;hand-
ndhalfon theother;andtheremainder
stancesmayrequire.Often,spaceat the
einsufficientto permitsucharrangement
andpieceswillhave tobebroughtforward
yingparties,inthe orderandatthemoment
bridgeassembly,fromsomepointslightly
gemaybe startedassoonasthe first
site.
tructionparties.(1)Theconstruction
derthedirectgeneralsupervisionofan offi-
atednoncommissionedofficer.
ngthsof thefootbridgemaybecon-
ncommissionedofficerand10men,orin
commissionedofficerand16men.These
oluteminima.Withbridgepartspiledcon-
footbridgemaybe mostexpeditiously
workingpartiesorganizedasoutlinedin
nhavecompletedtheir dutieswiththeanchorcabledetail, theyreporttothe
sreliefwhenrequired.Additionalcrewsof 4menshouldbeattachedto the
hentheamountofmaterialto behandledandthedistancefromthe shoreassem-
kesuchanincreasein strengthdesirable.
fromtheunloadingpointto theshoreassemblypoint.
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_
use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
49/218
SINGEQUIPMENT17
e builtina 2-milecurrent,about300
of anchorandfloatcableswith6bridle
oncommissionedofficeringeneralcharge,
ers,and41menforthevarioussections;
1-milecurrent,builtwith6guy lines(3
fficerornoncommissionedofficeringeneral
edofficers,and33men.
ariedoutin theformofadrill, the
n doublerank,withanintervalbetween
commissionedofficersinfrontoftheir
dualdutiesareassignedtothemenwithin
leader,andat thecommandforcon-
ctionsproceedtotheir varioustasks.
e. (1)Officerincharge.Theofficer
erinchargeofconstructionhastheworking
ructionsastothe useofanchorand
signatesor hasmarkedthepointsat
ofthefloats aretoenterthewaterat thenear
k;and,assoonasthe sectionleadershave
ftheirparties,givesthe commandtobegin
ter,heexercisesgeneralsupervisionoverall
Theanchorcablesectioncarriesfor-
om thebridgeandascloseas practicable
arshoreanchorcableconnectionistobe
s:anassaultboator othersuitableboat,
rcableon itsreel,astickon whichthereel
e,pickets,lashing,sledges,andother
ourmenofthenearshorepart ofthesection
nd oftheanchorcablewhileit isbeing
rig theblockandtacklefortighteningthe
holdfastwhenasuitable onedoesnot
ethecableto theholdfastbytheblock
issionedofficerincharge,ofthesection
onof theapproximatenumberandlength
enoncommissionedofficerandthefar
enloadthecableandthe neededaccessories
womenholdthereel inthecenterofthe
unreelastheboatcrossesthe stream.
ficersteersandtheremainingmenpaddle
arshore,the boatisunloadedandthe
esignatestheholdfast,ifoneexists, or
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
50/218
one.Theancnorcablethenis madefast.
ofbridlelinesrequiredcouldnot be
dgiven,thenoncommissionedofficersends
eline sectiononthenearshoreby
engerintheboat. Thenearshoredetail
ablewiththeblockandtackle,andmakes
ndisevenundesirable,toattempttoput
the anchorcable.Themoresagthe
s,the moreeffectiveitbecomesinresisting
nwhile,thefarshoredetailfindsor
arriedacrossriverinassaultboat.
float cable,andmakesitfastwhenit
ee(3)below).Whenthemenof the
fastthe floatcable,theystandbyon
ndingthebridge.The noncommissioned
enonlytwomorebaysare required
transmitsthis informationtothenear
bysending amessengerbackoverthe
ridge.
ssoonasthenoncommissionedofficer
eivesinformationfromthenoncommis-
rcablesectionasto thenumberofbridle
directsthepreparationbythesectionof
attachmenttotheanchorcablebythe
tributesthesectionon thebridgeatthe
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
51/218
SINGEQUIPMENT17
ctsthealinementofthebridge.He places
n,withhisline,onthe riverwardendof
hebridge,andthe remainder,withtheir
perintervalsasitis completed.Asthe
ridgeispushed acrosstheriver,themen
nementbypulling inorslackingoff
sthebridgemeetsthe farshoreitsaline-
ncommissionedofficer,andthenmadefast
totheduckboards.Inaswiftlyflowing
mancebythissectionofitsduties isboth
tance.
Onemanofthissectionridesthe river-
sectionofthe bridgeandpaysoutthe
sinthewater,nearthe inshoreendofthe
cesthecableinthehookson theup-
Generally,theholdfastfor thecable
bovethe levelofthewater,sothat itwill
ngthecablein thehooksoftwoor
thebridge,inorder topreventthemfrom
terwhenthecableismadefast and
ereachesthefarshore,the anchorcable
endof thefloatcable,andthefloat cable
earshore andappliesthenecessarytension
tensionneednotbe overabout300
enoncommissionedofficerinchargeof
testhenumberof linestobeused, where
othebridge,andtheholdfaststo beused
hore.Thelinesaremadefast totheduck-
requiredas thecompletedportionofthe
ver,thefirsttwolines beingmadefast
ebridge.Thementakepositionat the
payoutthelineas thebridgegoesout,
astswhennecessary.Underthedirection
officer,thesemenmaintainthedesiredposi-
ridge.The menupstreamanddown-
intainalinementbypayingout andtaking
en areassignedtoeachline.When
oldfasts,this isdonebythe menwhose
achedto thebridge.Holdfastsareso
menstationedat suchdistancesalong
hebridge,aswill causetheguylinesto
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
52/218
glewiththe lineofthebridgeto permit
nallyitmayheadvisabletoattachsome
ndusethemto assistinpullingthe bridge
place.Whenthe bridgeiscompleted,
epropertensionandmadefast.
y.
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
53/218
SINGEQUIPMENT17
n.Theseparatebaysofthebridgemay
bledbytheuseof atemplate.Suchatem-
ningwith driftpinsorstakesdriven into
neendofeachofthe twofloatsofone
,twotoeachfloat,procurethefloats
ecarryingparties,andplacethefloats
lates;twomenbringupthe duckboards
ts;and twoadditionalmenattachthe
board.Themenplacingthe floatscon-
dsbythefastenersas soonastheduck-
ssembledbayisthenimmediatelyremoved
ection.Thenoncommissionedofficerin
tsthework.
tion.Theassemblycarryingsectionis
reremovedfromthe shoreassemblypoint
ndpromptlycarriedandturnedovertothe
eassembledbaysarecarriedfarenough
attheywillfloatfreelybeforebeing put
e riverassemblysection.Thesectionmay
ear shoremenoftheanchorcablesection
havecompletedtheiroriginalduties.When
dditionalpartiesoffourmeneachmaybe
arryingsection.
.Sincetheassembledbaysaremost
edtothecompletedportionofthe bridge
ethehabitualmethodofassemblyunless
acenttothenearshoreis toodeep.The
nchargeofthe sectiontakespositionon
,onthe inshoreendofthecompletedpor-
destheincomingcompletedbayssoas
operconnectionbythe duckboardfasteners,
opartstosecureproperengagementof
semblycarryingsectionplaceseachbay
oat,itis takenoverbyfourmenofthe
homoveitinthe wateratthedirection
officerinordertomakeconnection.The
dbyengagingonepairofconnectorsata
d outoflineofthe completedportion
ectorsononesidehasbeenfitted.The
he bridgeawayfromtheshoretomake
remainingtwomenofthesectiontake
fthecompletedportionofthebridge,moving
PublicDomain,
Google-d
igitized
/http://www.h
athitrust.org/access
_use#pd-g
oogle
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
54/218
ERS
ofthenoncommissionedofficer,andassisting
mbledbaytothe bridge.
Onemanofthehandrailline section
eriverendofthe firstduckboard,andthen
earitsinshoreendand threadsthehandrail
postson eachsideasthebridgeis pushed
enear shore,oneupstreamandonedown-
payout thehandraillines:andmakethem
ckboardwhenthebridgeiscompleted.
ions.Materialcarryingsectionsare
sary.Thecircumstancesrequiringtheuseof
widelythatno definiteorganizationor
blysectionatwork.
ed.However,itisofthe utmostimpor-
nizedand supervisedbyofficersandnon-
atthepartsoftheequipmentwillarriveat
nthe properorder(seepar.17#(2)). At
tbetakenforthe properguidingofthese
newill goastray.Whitetracingtape
purpose.
tructionofbridge.a.Factors
ntothetacticaleffectoftheenemy,therate
edbythewidthandstage ofthestream,the
econditionssuchasthe natureofthebanks
eweather,visibility,andtheconditionand
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
55/218
SINGEQUIPMENT
andwell-trainedmenhavecompleted
ilecurrentinas littleas814minutesin
sat nightwithouttheuseofany lights.
ditions,ashoreassemblydetailhasassem-
d in8seconds.Whilethismayserve as
ofengineertroopsin thetechniqueof
sideredcompleteuntilerectionofthebridge
anunfamilarsiteunderunfavorable
nderordinaryserviceconditionsratesof
becauseof unfamiliaritywiththesite,the
elaysimposedbybattle,andthefatigueand
ofthetroops.Assuminga fairlygood
mblyarea,troopssomewhatfatiguedbut
trainingwiththeequipment,andwith
xceptionallygoodnorexceptionallypoor,
lowingtableaffordabasisfor timeesti-
tbeincreasedordecreasedasconditions
Duringpeacetimetraining,.therates
ytroopswho haveattainedproficiencyin
a.Limitationsofequipment.The
ouse asanassaultbridge,thatis, one
erastreamwithoutthe knowledgeof
endlycoveringforcehasbeen crossedto
eptunderveryfavorableconditions,the
mbledinrearofthe riverandthencarried
hedasaunit.Becauseofthenature of
attheriverbankis certaintocreatenoise
medistance.
uringactualoperations,itwillsooften
thebridgeundercoverof darknessthat
abitualprocedure.Ingeneral,construc-
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
56/218
ERS
denticalwiththatindaylight.However,
tructionatnightisevenmoredependent
secontrol,andadequatetraining.Prior
ouldalwaysbegivenwhenpracticable,pref-
arkness.Noparticulardifficultyisin-
ndividualbaysand incorporatingthem
ness,althoughtheprocessis somewhat
yarisesintheproper placingandhandling
inthedirectingofthe bridgetothe
ore.Thesedifficultieswillvarywidely
d forceofcurrent,andwiththedegree
minimizedbycarefulprior reconnaissance
dorganization.Suitablearrangements
unicationduringtheprocessofconstruc-
ableinnightconstruction.Exceptwhen
or whenthereismoonlight,theanchor
ht, because,eventhoughitmightnot
hedirectionandalinementofthebridgecan
ntainedbythismeans.A singleflashlight
nbeusedon thefarbanktoindicatethe
chorcable,andthenthepointof landing
no likelihoodofdetectionbytheenemy.
hieldedflashlightsmay bepermissible
ollingthehandlingorplacingofcables
lightstoaidinthe assemblyofthebridge
ssary.Ifavailable,luminousmarkersor
orwhitepiecesofcloth areusefulinout-
turessuchastheassemblytemplateand
y.Althoughactualconstructionwillordi-
the needforsecrecyhaspassed,com-
cebywordofmouthmaybe expectedto
esoundsof battleinthevicinity.More-
be permissibleexcepttoaverylimited
auseeventhoughthenecessityforavoid-
st, itwillseldombedesirableto dis-
thebridgeto aerialandgroundobservers
ights aroundtheconstruction.
ngbridge.a.Controlofcol-
rryeithermenandtheirequipmentor small
PublicDomain,
Google-d
igitized
/http://www.h
athitrust.org/access
_use#pd-g
oogle
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
57/218
SINGEQUIPMENT20-22
antryaccompanyingweapons.Themen,
ossat doubletime,maintainingintervalsof
parationisrequiredtoprovidesufficient
concentrationofloadson thebridge.
particularlywarnedagainstclosingup
fconsiderablecurrent,asitispossible
erturnbyoverloading.Thebridgewillcross
ylightforbridgelengthsoffrom 100to
doubletime,but75menper minuteisa
gnconditions.Thesefiguresshouldbe
uringadark night.Therateofcrossing
dnessofthecrossingtroopsthanby the
f.
icerinchargeofconstructionofthe
yoftroopsupon thebridge,andstations
edofficers,orofficers,atthefarend ofthe
gtheclearingofthetroopsfromthat end.
aininplaceforsometimeafter itiscom-
ardshouldbe mountedinordertoadjust
inthebridge inpropercondition,andto
singtroops.Thepriorityoftrafficonthe
governedbytheordersofthe localor
absenceofsuchorders,trafficisregu-
eror soldiersinchargeofthebridge.
Workingsectionsinthesamenumber
ectingthebridgeare requiredfordis-
smantlingprocedureisthereverseof
ceptionisthatthefloat cable,whichis
opreventOA'erturningoftheloadedbridge,
etopermitreadydismantling.
.Assemblyoflays.Thereinforced
bridgeinthat eachbayconsistsofthree
ndabuttingalongtheirsides,and six
perbay,onenear eachoutsideduck-
eadoftwo.Thus oneunitoftheequip-
of bridge.
f cables.Althoughitwouldbeprac-
dgeunderfavorableconditionsinlengths
kelythat itwillbebuilt inlengthsex-
eofthequantityofmaterialrequired.Al-
eaterresistancetothe currentthanthe
erigid andstablelaterally.Becauseof
PublicDomain,
Google-d
igitized
/http://www.h
athitrust.org/access
_use#pd-g
oogle
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
58/218
bayofreinforcedbridge.
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
59/218
SINGEQUIPMENT.22
t cableisnotusuallyrequired.Therein-
edifficulttopush outacrossthestream
useofitsgreaterresistancetothe current
waysbeused, exceptforveryshort
n.Thegeneralmethodsofconstruction,
paratorymeasuresandtheconstruction
revirtuallyidenticalwiththose forthe
ngprocedureisalsothesame.Thefloat
ill berequiredonlyinthe rareinstances
uresis applicable.Anchorcable,bridle
rassemblydetailsof thesamesizeand
orthefootbridgearerequired.Twoor
ilswillberequired,eachto consistof1
nd10men.In constructingthefootbridge,
ssufficientbecauseitcan assemblethe
epupwith thespeedoftheirconnection
fthebridge bytheriverassemblydetail.
nedbyone shoreassemblydetailforthe
moremenareas manyascanbeadded
gthe mengetineachother'sway,addi-
ed.Eachassemblycarryingdetailmust
missionedofficerand12men,andthe ma-
tbecorrespondinglystrengthened.With
ydetailsworking,thereinforcedbridge
uttwicethetimethat wouldberequired
ncesforafootbridgeofthesame length.
cedbridgewillcarry
gweaponsoncartswithmulesnose
wnbyhand.
f threeatawalkat therateof100
f twoatarun,at therateof150
otorcycleswithsidecars.
ent.Thereinforcedbridgewillseldom
asmadeoriginallyinorderto provide
ngthe animaldrawncartsthatwere
sportinginfantryaccompanyingweapons.
omeobsolete,oneofthemainreasonsfor
eenremoved.Moreover,pastexperience
necessarytocrossthe infantryaccom-
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
60/218
al-drawncarts,andthatoftenitwasdis-
ftheensuingcongestionatbothendsof
yatthefar end.Occasionallythere-
efulforcrossinginfantryaccompanying
nwheeledmounts,whicharestillprovided
eseweaponswhentheirmotortrans-
Themostprobableuseof thisbridge,
eafootbridgeof greatercapacityover
dgeinuse.
orsectionsofthefootbridgeareless
ingmenthanaresmalllogsor other
gfloats.Thefloatsand duckboardsare
sistancetothecurrentand toforward
atherthanassist theswimmer.Kaftsof
ssas ferriesbecauseoftheirlimited
difficultyofcontrollingorpropelling
Raftsmadeofonebay ofreinforced
thefloatsdovetailedandlashedtogether,
erryingoperations,butevensuchunits
urpose.Theserafts mustbeguided
blesor ropes,sincewithouttheseaids
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
61/218
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
62/218
ERS!
ons,whichissufficienttopass alltheloads
Corps fueltruck.
sign.Thebridgeconsistsofafloat-
bypontonsandconnectedtoshore abut-
e spans.Thefloatingpartisconnectedto
ans hingedbothtotheshore pontonsand
cipalcomponentsofoneunitofthe
pontons,and thefloorsystemtransported
ithcertainsparepartsand accessories.
desabout250feet ofbridgeof10-ton
oncapacity.Theexactlengthofthe
varyingthe locationofthehingeineither
tableI(par.102) forcompletelistof
tofequipage.
equipageareassignedtoeachlight
ompanieswillbeassignedtotacticalorgani-
ationdemands.
FEQUIPMENT
0
nisrectangularincrosssectionbe-
scowtypeends,eitherofwhichmayserve
tlong, 5feet6incheswide,and 3feet
ofaluminumalloysheets andshapes
ontonissubdividedintofour compart-
eadframeswhichreachtoa heightof9
s.Astoragecompartmentforaccessories
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
63/218PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
64/218PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
65/218
SINGEQUIPMENT
heponton.Thefloorofthe pontoncon-
ngon thetopofthebottomrib system.
nds forthesecuringofanchorandother
ocksareplacedinthegunwalestopermit
oars andasteeringoarat eitherend.A
eachsideof thepontontowhichareat-
stenersusedforclampingthebalktothe
Thirty-twoofthesefastenersareofa
pe.Fouradditionalfasteners,whichareof
videdassparesand aresecuredtothe
at theycanbereadilymovedtoreplace
ers.Acarryingrailissecuredalong the
ponton,andthebottomoftheponton is
ids.Inuse,eachpontonnormallyis
,oneanchorcable,twoboathooks,eight
nepump.
0poundsandhas atotaldisplacementof
ingtablegivestheponton'sdisplacements
boards:
eisdesignedtocarry themaximum
ngpart.Thetrestle partsarethetransom,
nhoists.
upbeamofaluminumalloy,tothetop of
nthis tubetheendfittingsof thetrestle
atswhichare usedinfasteningthe
transomare providednearthebottomof
s13 feet10incheslongby9 inches
etwo columnsarealuminumalloytubes
hicha verticalrowofholesisprovided,the
rton centers.Twopinholesareprovided
transom.Oneoftheseholespassesthrough
doneperpendiculartothe centerlineof
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
66/218
dat1% inchesvertically.Apinis
etransomby achain.Eachendofthe
nthecolumnbypassingoneof thesepins
es inthecolumnwellanda holeinthe
ahalfinch adjustmentsinheightcanbe
olesinthetransom.If,for anyreason,
deemeddesirable,itispossibleto makethem
oughanangle of90 withawindlassstick
restle.
nthetransom.Two1-tonchainhoists
stleforadjustingthe heightofthetransom.
swiveledhangersat thetopofthe trestle
oksengageinstirrups integrallyattached
placedonthetopof thetrestlecolumn
nes.Theshoes arealuminumalloywith
dare 24inchessquare.Ashoeis attached
e columnbyaballandsocketjoint and
eendofa chainwhichisattachedtothe
e onthehemisphericalendofthecolumn.
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
67/218
SINGEQUIPMENT
eifthishookcomesout,anotherhook,also
hain,isengagedinthefirst pairofholesin
e.(Seefig.22.)The completetrestle,less
00pounds.
ns.Floatingspansare15%feet,
sare 15feetinlength.Fixedspans are
eor fromtrestletotrestle.Thehinge
riverwardtrestleto thehingesill.The
balkofthefirstfloatingspan byabout6feet,
cationofthehinge sillinthefloating bay
mustbea fullbalk'slengthfromtheri ver-
16FT
ndplanoftypicalshoreconnection,usingtwotrestlespang.
Thedeckof fixedandhingespans
.The pontonbalkspantwoadjacent
ns.In otherwords,thepontonbalk
otherat eachpontonbythewidthofa
ecurelyfasteneddownonfourgunwales.
mentgivescontinuousbeamactioninthe
e.A considerableportionofaloadcon-
onepontonwill betransmittedtoadja-
ortionto thetwonextadjacentpontons.
derailsinthefixedspans,hinge spans,and
nd ofthebridge,andpontonbalk inthe
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
68/218
ERS'
derailslapover ateachpontonasdothe
placewithclampsthatsecurethemto
htheyare laid.Theclearroadwaywidth
ches.
andtrestlebalkare4 inchesby6
tdimensions.Thebalkaremade ofhigh-
tonbalkweighsapproximately140
kapproximately100pounds.Eightbalk
tringers,andtwoassiderails,i nthe
t4%inchesin length,withametal
ndofthe balkandformingasemicircular
theend.Thisfittingengagesthetube
nsom.Nineinchesfrom'thelatter fit-
metal,whichissecuredtothe underside
teningthebalkdownon thetrestle
olocatedprovideaspaceto receive
esill. (Seefig.24.)
eet5inchesinlength.Eachend is
n theundersideofwhichisfitted aclip
overtheoutsideedgeofthe pontongunwale,
readily assembledintobays.(Seefig.
remetalstraps aroundthebalk,ending
oksofthebalkfastenersin theponton
epontonfitsbetweenthetwo endfittings.
emadeofhighgradeDouglasfir andare
%inches,netdimensions.Ateachend
sthewidthisreducedto 10%inches
cingof thesiderailclamps.(Seefig.
theendsofthechessand theouterends
ventsplitting.A chessweighsapproxi-
eof highgradeDouglasfirandare
%inches,netdimensions,metal-bound
their ends.(Seefig.24.)Asill weighs
s.
hesiderailsaresecuredbyascrew
bout10pounds,whichengagesunderthe
esiderail,clampingthechessin placebetween
utilized withtheM1869pontonequi-
stitutefasteningintheabsenceof the
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
69/218
SSINGEQUIPMENT
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
70/218
madebypassingalashing, twiceif
single, aroundthebalkandsiderail,tying
t,andthentwistingittightly witharack
skitincludesspecialtools,material,
ofthepontonsandthe trestletransom.
listedontheinsideof thelidofthe chest
itemsoftheequipmentaretrans-
rs.Therearefourtypesof trailerloads
heeltrailer,asfollows:
eponton,oneanchor,oneanchorcable,
,andonepump.
llashing(usedonlyinabsenceofmechanicalfasteners).
0pontonbalkand16chess requiredfor
0 trestlebalkand16chessr equiredfor
sillsor 2coilsof1-inchropein addition.
stles.
ngularshapedopenchassisofsteelmem-
e;pneumaticheavydutytires7.00 by20;
of commercialtrucktype;andsprings
(Seefig.26.)Auxiliarylashingrings
nersofthechassistoassist inmanhandling
itdownsteepgrades.Theseringsalso
lashingsto securetheloadsshouldthe
gdevicesbelostorbroken.
rtelescopictype,permittingthree
equiredfor theseveralloadings.The
peradjustmentbyapin,andis further
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
71/218
SSINGEQUIPMENT
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
72/218
ERS'
estis providedforthedrawbarsothat
tedina horizontalpositionwhenunhooked
sresthas akneebrace,whichcanbe
hthe drawbarandtheresecuredbymeans
edwithbrakesandwhenparkedon
rfacethewheelsshouldbechocked.
s1,500pounds,andthe loadedweights
ws:
eaboveloadsmaybetowedby the
wever,underfavorableconditionsa
d.
trailerby meansofclampingbeams
operatedscrewsandchainlinks.When
heclampingbeamsaresecuredinbrackets
tpurpose.(Seefig.26.)Thechainsthat
pingscrewsontheside ofthetrailerframe
etrailerandthentightenedup withclamp-
ng.Beforethetrailer canbeloaded(ex-
allthese itemsareremovedfromtheir
nvenientlocationforuseas thetraileris
thepontonisloaded,thepontonclamp-
ts keeperandplacedcrosswiseofthe
willallowthebeamclampingpinto
the drawbarthroughthepineyes,which
thethrustscrew,therebyclampingthe
fig.27.) Thefourloadclampingbeams
rkeeperswhenthetrailer iscarryingthe
\PONTONCLAMPINGHOOK
PublicDomain,
Google-d
igitized
/http://www.h
athitrust.org/access
_use#pd-g
oogle
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
73/218
SINGEQUIPMENT
eduprightand loadedsymmetrically
fourpointsbyhooksengagedoverthe
and clampedtothesidemembersofthe
mpingscrews.Thepontonisalsoclamped
complishedbymeansofthepreviously
eam,onwhichthebottomoftheponton
e endofthebeamareplacedover the
nd thenthepontonisclampedsecurely
he wingnutsofthehooks.
sarefirstloadedflat,in fourstacksof
eclampedtothetrailer bymeansoftwo
dthechainsfrom thetwooutsideclamping
nthebeamdevicesandsecurelytightened.
thenplacedontopof thechessclamping
bythesamemethodasused forthechess.
overthebalkhavebeentightened,the
placedlengthwiseinthemiddleof theload
e clampingbeamsoverthebalk.The
edintheeyesof thefoldingstirrupslo-
bolsters.Thebeamissecuredinplace
sof thehooks.Unlessthepontonbeam
dicated,thedeflectionin thebalkclamping
debalkloose.
oadissecuredwiththesameclamp-
d."Thechessand trestlebalk,insteadof
arearrangedand clampedasinloading
ddition,ontwoof thetrailers,twosills
M
ad.
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
74/218
,oneoneithersideofthe pontonclamping
ingtherings intheendsof thesillstothe
athirdtraileran assaultboatislashed.
stletransomsareloadedonthetrailer.
edon theirsides,oneeachoneither side
stheponton clampingbeamwhenthetrailer
eamsareplacedacrossthetransomand
outsideor shortchainclampingscrewsare
e fourtrestlecolumnsareplacedonthe
ngthetransomsandareheld downwiththe
eams.Thelatterclampingbeamsarese-
e insideclampingscrews.Theponton
inthesamemanneras withthedeckloads.
placedonthetrestlecolumns,twooneither
gbeam,andlashedto thecolumns.
eral,unloadingtrailersisthereverse
Assoon asthetraileris unloaded,all
gthepontonclampingbeam,mustbecare-
and securedasdescribedinparagraph
peciallyimportantthatthepontonclamping
drawbarofthe trailerafterthepontonis
pontonshouldbeunloadedondryland.
stationedoneachsideofthe ponton.At
alltakeholdofthecarryingrail ontheside
mandRAISE,theyraisethe pontonclear
ommandFORWARDMARCH,theycarryitin
edrawbar.Ifthe truckisstillattached
etrailerout fromunderthepontonas
edclear.Whentheapproachtotheriver
y,thepontonshouldbecarriedintowater
ofloatit throughoutitslength.
sthepontoncanbemostrapidly and
therbytiltingthetrailerandletting the
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
75/218
SINGEQUIPMENT41-44
hewaterin caseofasteepbank,or by
riveruntilthewateris deepenoughto
se ofashelvingshorewitha gravelbottom.
id offthetrailerintothe waterwhen
the pontonmaybedamagedbystriking
ore orslightlysubmergedalongthewater's
motors47
motor48
.motor49
organizationalequipmentofeachunit
efollowing:
.
-hp.motorweighsapproximately110
lengthof about52inchesandanover-all
carriesathree-bladepropellerwitha
a pitchofabout8inches.It isanon-
ope-startingmotor,ratedat22 hp.at4,000
for theoperationandcareofthe
hmotorand describesindetailtheparts
ts andaccessoriesfurnishedwitheach
par.102).
Anattachmentbracketisfurnished
fastenedtothesternof theponton,
e pontonandhookingovertwolugson
rmscarryaboardto whichthemotor
or details.Theboardisraisedor lowered
ellermaybekept submergedattheproper
ftof theponton.
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
76/218
racketfor22-hp.motor.
etowingadapterisadeviceforfacili-
powerpontonto araftinbridging or
stenedtothe bowofthepowerponton
woof thepontonsintheraft. The
changesindraftduetoraft loadingand
he steeringcomponentofthepropeller
rcontrol.However,inmanycases,attach-
rdirectlyto oneofthepontonsforming
ntpowerand controlsothataseparate
rwillnotbe required.
mallmotorofabout4.5horsepower,for
theassaultboat,weighsabout45pounds
of about46inchesandan over-allwidthof
wo-bladepropellerwithadiameterof
out1-yzinches.Itshouldoperateat about
ylinder,rope-startingmotorwhichis
Completeinformationonoperatingthe
structionbook.Thesparepartsand
heachmotorarelistedintable I(par.102).
eofthemotors.Successfulandde-
boardmotorsisassuredprovidedthe
emanufacturer'sinstructionbookarefaith-
d,andthemotorsareoperatedonlyby
Otherwisetheoperationofoutboard
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
77/218
SINGEQUIPMENT47-48
ndunsatisfactory.Thefollowingpoints
phasis:
edfortransportationofmotorsby
sed.Motorsmustnot bedroppedonthe
xesor not.Motorsshouldbecovered
anufacturerregardingsparkplugs
gasolineareespeciallyimportantand
sarethemostfrequentcauseof failure
rt ortooperateproperly.Themotor
rryatleastoneextraset ofclean,dry
soastobe preparedtomakeimmediate
sary.
beprohibitedfromdisassemblingthe
andreplacementofsparkplugsand
toffuellinescreens.Otherrepairsare
dunderthesupervisionofaskilled
hp.motor.a.Thismotorisfor
gein bridgingandferryingoperations.
nit hasmanyuses,suchasferryingtroops,
tonstotheirplacesinthe bridge,patrolling,
efar shoreandsimilarwork.Incurrents
more,theefficiencyofbridgingandferrying
asedbytheuse ofoutboardmotors.
tboardsarenecessary.Foratwo-
be attachedtoonepontonoftheraft.
hould beattachedtothesternof aseparate
powerponton,fastenedtotherearof the
wingadapter.Toholdthepowerponton
theraft,linesshouldberun fromthesides
e powerponton.(Seefig.32.)Training
yforefficiencyintheuseof motorsinponton
n streamsofsufficientdepthtoprevent
hepropellershouldbe raisedandcleaned
sary.Driftwoodmaydamagethepro-
sed.
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
78/218
y-outforoutboardmotorsusedwithpontouraft.
speedsofindividualpontonsandrafts
torareas follows:
_ ___
_
-hp.motor.a.Thismotorisfor
othersmallboatswhenlightboatsare needed
or ferryingoperations.Someoftheuses
singoperationsare
water.
mallpartyto thefarshore.
oat.
bedifficultor impossibletomovea
watertransportationmaybeneededforre-
orinspections.Alsoallthepontonsmaybe
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
79/218
SINGEQUIPMENT49-52
uch caseslightmotorboatswillbe of
htofanassaultboatis about200pounds.
dedin eachunitofpontonequipage,and
tocombatunitsand lightpontoncompanies
th thelightmotors.Asmallpieceof
wosmallbentmetalstripsfor hangingit
ernisfurnishedfor eachmotortoserveas
cketmaygripthe sternproperly.The
hthelight outboardcanmakefrom5to
er.
iseisusuallysoughtinferryingthe
tboardmotorsshouldnotbe usedwith
tions.
uctedengineersoldiermustbeagood
xercisesshouldbethoroughlytaughtand
introopstomaneuverapontonexpertly.
a.Individualinstructioninthe
d boathooksshouldbecarefullysupervised
ersofthecompanytoseethateverypart of
.
noncommissionedofficer)embarkshis
f6oarsmen,andpushesoutintodeepwater
epontonisprovidedwith 7oars,2boat-
able.Theinstructor,placinghimselfin the
ninturnto practicewiththeoar,theothers
hedrill.
TION,theoarsmaninsertstherowlockin
gaftplaceshimselfin themiddleofthe
ock,assumingastandingpositionand trim-
RS,hegraspshis oarandraisesit briskly
ecenterofhis body,thehandlerestingon
thebladeparalleltothe keel.Thehand
he oarattheheightof thechest,elbowand
steadiesit atapoint12 incheslower.
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
80/218
LL,heside-steps18incheswiththe foot
allowshisoarto falloutwardsothatthe
lethe shaftisheld clearofthegunwale.He
erowlock,31/2feetfromtheendofthe grip,
Henextslips onehandtothegrip and
8inchesfromit,the backsofbothhands
wered,andmovesthefootnexttothe rowlock
y31/4feetoftheoar shouldbeinthe ponton.
AT,givenwhentheoar isatthefinal
TALL(oratHOLDWATER,inwhichcasethe
hisposition),heraises hiswristsandex-
eweightof thebodywellforward,drops
ewater,throwshis weightstronglyback-
agesitfrom thewater,andresumeshis
nsarerepeatedwithregularity,taking
,to keeptheoarnearthe water,andto
ewrists aftereveryemersionuntilthe
orOARSisgiven.Theinstructorwilltake
dbytheweightofthebody andnotbythe
NOTTGH,givenwhentheoaris inthe
onestroke,raiseshisoar toaverticalposi-
heponton,thebladetowardthe bow.
givenwhentheoaris inthewater,he
andresumesthe finalpositionindicated
tionHOLDWATER,thestrokeisomitted.
WATER,givenwhenthecaris inthefinal
ALL,theoarsmanraisesthegrip soasto
ater,andholdstheoarfirmlyat rightan-
ertical.Theobjectis tocheckthehead-
ALL,givenwhentheoaris atHOLDWATER.
catedforLETFALL,hereversestheopera-
underGIVE WAY,andbypushing
whenimmersed,givesthepontona motion
sesatthecommandsWAYENOUGHorOARS,
cribedabove.
sgivenwhentheoar isinthe finalposi-
L,andisexecutedbyremovingtheoar from
ail alongside,heldbythehandnextthe
sedwheneveritis necessarytoprevent
AtthecommandSHIPthe oarisrestored
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
81/218
HINGEQUIPMENT58-53
AKSmaybegivenwhentheoaris inthe
LETFALLorat upOARS.Theoarsman
al,ifnotalreadythere,lays itquietlyon
n,bladetowardthebow,and takesthe
a.Theobjectofthis schoolisthein-
the managementofthesingleponton.
allofthecreware thoroughlyfamiliar
escribedunderindividualinstruction.
ctedundertheclosesupervisionofa com-
tandleftof aboataretheright and
ow.
orprovideshisdetachmentwithseven
ormsit insinglerank,withthe best
mandsLEFTFACE,andmarchesit
oathooksare carriedontheshoulder,
e oarsaredepositedinthe bottomof
des towardthebowandtheseventh
areplacedoutsidetheoars,prongs toward
din thebow,withthelowerendmade
andtheotherattachedtotheanchorby
orisplacedwithits flukesoverthebow
estingon theaccessorystorage
TION(executedasunderindividualin-
ethemselvesintheorderin whichthey
rightoarsman(strokeoar) takingthe
othersalternating,theeven numbers
abreastoftheoddnumbers.The instruc-
oofthecrewto stepashore,removethe
pushthepontonfrom thebank.
RS(executedasunderindividualinstruc-
ereversedoar himselfand,drawingit
adeoverthe stern.
EOFFthemenonshore,aidedby the
ry,byothersofthecrewwith theiroars,
mthebankandjump in.Alltheoarsmen
fUP OARS,andtheinstructorplaceshisoar
dinesstodirectthecourseofthe boat.
(executedasunderindividualinstruction)
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
82/218
toexecuteinunisonthe following
underindividualinstruction,theafter
givingthecadence:GIVEWAY;WAT
ALL;OARS;HOLDWATER;STERNALL;UNSHIP;
nordertosecurethesimultaneousand
emovementsthepreparatorycommands
ybe used:STANDBYTOGIVEWAY;STAND
NDBYTOSTERNALL.Theseexerciseswillbe
rewcanexecutethemproperly.
rilledintheforegoingsimple exer-
omplicatedmovementswillbetaught:
dly,theoarsbeingat thefinalposition
einstructorcommandsGIVEWAY
FT(orRIGHT).Pullingand
withtheafteroar oftheirownside.To
orcommandsGIVEWAY,atwhichthe
ctstroke.Assistingwithhis ownoar,
pontonwith greatrapidityandina
ethod.
onis firstheadedtothecurrentand
mmandPREPARETOCASTANCHOR,theright
theiroars; theformerunshipsthebow
ndsees thatthecableisclear,whilethe
both handsneartheshank,andstands
Atthe commandCASTANCHORhetipsit
therightbowoarsmaninpayingout the
sdroppedastern(or beenbacked)about
water,theytakeasingleturnaround
holdstronglyuponthecableto makethe
om.Whenthis isaccomplished,they
muchmorerope,and thensecurethe
eats.TheinstructorthencommandsBOAT
ewbeingat ATTENTION,theinstructor
TOWEIGHANCHOR;2.UPOARS;3.LETFALL.
bowoarsmanloosensthecablefromthe
t bowoarsman,passesitoverthemiddle
readytohaulin.The remainingoarsmen
commandsasgiven.Theinstructorthen
causesthepontontobemovedslowlytoward
antakinginthe slackofthecableand
bow.Whilethecablebecomesvertical,
hecked,andthetwomen,pullingvigorously,
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
83/218
SINGEQUIPMENT53-54
w,whereitisheld bytherightbowoarsman,
graspsthe stockwithbothhands,and,
sman,lifts ittoits positionalready
beremovedbyhandandtheanchorcleaned
metheiroars andtakethestroke.
ngthelandingplace,the pontonbeing
tion,theinstructorcommandsINBOWS.
oarsmantakesonestroke,and,boating
ndividualinstruction,takesaboathook
inthelanding.Whensufficientwayhas
rcommandsWAYENOUGH,andthe
emainingboathooktoassist intheland-
steeringoar thenbringstheponton
nvenientmanner,causestherowlockstobe
tobe properlysecured,andlandshismen
escribedforembarkingthem.
SANDGENEEAL
mbalk57
ridgesofvarioustypesmaybecon-
methods,"asfollows:
,whichmeansthatthefloatingportion
essivelyaddingonepontonafteranother.
thatparts consistingofthreebays,
ofbaysareassembledalongtheshoreor in
ercoverandfloatedtotheir placesinthe
materialrequiredforeffectingtheconnec-
ed.
hatrafts ofoneormorebaysof the
gtheshoreor insometributarystream
irplacesin thebridgeandconnectedto-
pontonsof adjacentraftstogether,side
orsomeothermeansto keeptheadjacent
ectionatthesamelevel.
hefirst two,constructionbysuccessive
pplicableto thelightpontonequipage,
ofconstructionbyraftsofferslittle,if any,
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
84/218
ERS
odofconstructionbyparts,andabridge
ableofsupportingonlythe lightestloads
eamactionofthebalkis interruptedatthe
ontinuousbeamactionis requiredto
the bridgeisdesigned.
tionbypartswillbe particularlyappli-
whichprovidesconcealmentanddefilade,
ory.In suchasituationitmight be
he floatingpartsofthebridgeduring
vercrossingoperationandfloattheminto
econstructionofthepontonbridgeis
themostfavorableconditionssomeform
lablefor maneuveringthepartsinto
oardmotorona separatepontoncan
artin streamswhosecurrentdoesnot
nderno circumstancesshouldthemethod
attemptedunlessthetroops arethor-
escribeddrillfor thenormalmethodof
vepontons.
nallythewaternearthe abutmentsill
eventcontactbetweenthebottomofthefirst
whenthebridgeisheavilyloaded.How-
essarytouseoneormoretrestles toreach
enecessarydraftforthe pontons.The
le istofloatit intopositiononaraft which
tingbayof bridge.Whenseveraltrestles
onnection,therivertrestle willbeplaced
wateris tooshallowtofloatthetrestle
to allowfreeactionforthefirst boat
thismethod,itmustbe assembledonthe
ositionaspossibleand manhandledintoits
thismanualthe flotationmethodwillbe
atermethodandthemanhandlingmethod
hallowwatermethod.
llgovernthe erectionmethod.For
ayberequired,thefirsti nshallowwater,
noughto floatthehingespanraft butnot
useofthe shallowwatermethod,andthe
caseitis preferabletoerectthefirsttwo
ytheshallowwatermethod,addinganaddi-
orerectionofthesecondtrestle-No at-
unchmorethan onetrestlefromthehinge
PublicDomain,Google-digitized
/http://www.h
athitrust.org/access_use#pd-google
7/30/2019 Tm 5-270 Standard Stream Crossing Equipment, 1940
85/218
SINGEQUIPMENT
ormalmethodofsecuringthebridge
ctionisby anchorswith1-inchropeanchor
chorson thelineofupstreamanchors
elocityofthe current.Thedownstream
ytoprovide cablesforthemanipulationof
ementofthebridgeduringconstruction,
weavinginthecurrent.Thedownstream
datintervalsof62 feetorateveryfourth
oprovides