Jointbars,alsoknownasfishplates,areanessentialcomponentofrailwaytracks.Theyareusedtoconnecttwosectionsofrailtogetherinordertocreateacontinuoustrack.Withoutjointbars,therailswouldnotbesecurelyconnectedandtherewouldbegapsinthetrack,whichcouldleadtoderailmentsandothersafetyhazards.

Inadditiontoprovidingstructuralsupport,jointbarsalsohelptodistributetheweightofpassingtrainsmoreevenlyalongthetrack.Whenatrainpassesoverajointinthetrack,theweightofthetrainisconcentratedatthatpoint.Thiscancauseexcessivewearandtearontherailsandincreasetheriskoftrackbucklingorothertrackdefects.Jointbarshelptospreadthisweightacrossalargerarea,reducingthestressontherailsandprolongingtheirlifespan.
Anotherimportantfunctionofjointbarsistomaintainalignmentandcontinuityinthetrack.Whentworailsectionsarejoinedtogetherwithjointbars,thebarshelptokeeptherailsalignedandpreventthemfromshiftingormovingapart.Thisiscrucialforensuringsmoothandsafetrainoperations,asanymisalignmentorgapsinthetrackcancausetrainwheelstoderailorderailment.Jointbarsalsohelptoreducenoiseandvibrationsthataregeneratedwhentrainspassoverthejointsinthetrack.
