Answer: trestles

AnswerCrossword Clue
TRESTLESRoller coaster structures
TRESTLESRailroad crossings
TRESTLESFrameworks for bridges
TRESTLESCertain tables
TRESTLESCertain bridges
TRESTLESCarpenters' supporting devices
TRESTLESCrossings for Casey Jones
TRESTLESSome bridges
TRESTLESTrains may use them
TRESTLESSome frameworks
TRESTLESCrossovers
TRESTLESSupport structures
TRESTLESThey cross many valleys
TRESTLESSupporting towers
TRESTLESBridge supporters
TRESTLESSupporting towers for a bridge
TRESTLESStructures over valleys, perhaps
trestlessupporting frame composed of a bar on two pairs of spreading legs
trestlesTRESTLE, a framework for supporting a bridge, also TRESSEL
TRESTLESRelatives of sawhorses.
TRESTLESBridge supports
TRESTLESBridges
TRESTLESAmtrak supporters
TRESTLESTrack supporters
TRESTLESRailroad spans
TRESTLESRailroad bridge supports
TRESTLESRailroad-bridge supports
TRESTLESBridge-supporting frameworks.
TRESTLESSawhorses.
TRESTLESTrack supports
TRESTLESElevated railway spans.
TRESTLESBraced frameworks.
TRESTLESBridge supports.
TRESTLESCertain railroad bridges.
TRESTLESSupporting frames.
TRESTLESBridge structures.
TRESTLESFrameworks
TRESTLESRailroad bridges