portal crane
Engineering
noun
A crane mounted on a portal frame, so as to allow the passage of vehicles underneath.
Origin
Early 20th century.
- on tap
- on target
- on-target earnings
- Ontarian
- Ontario
- Ontario, Lake
- on tenterhooks
- on terms
- on that (or this) score
- on the agenda
- on the (auction) block
- on the back burner
- on the back foot
- on the ball
- on the barrelhead
- on the beam
- on the bench
- on the bit (or bridle)
- on the blink
- on the bludge
- on the bones of one's arse
- on the books
- on the bounce
- on the bow
- on the bubble