Gantry Crane vs. Jib Crane: Which Fits the Work?
A gantry crane straddles the work on freestanding legs and can move to the job; a jib crane sweeps a fixed circle around a pivot anchored to a column, wall, or foundation. That geometry is the whole decision: a jib owns one circle of floor, permanently and efficiently. A gantry owns wherever you roll it. Pick by asking where the lifting happens — one workstation forever, or wherever the work is that week.
How each one covers the floor
A jib’s boom rotates around its mast, serving a circle (or part-circle) whose radius is the boom length. Everything inside that circle is served brilliantly; everything outside it doesn’t exist. Installation is permanent: a foundation or reinforced column connection engineered for the overturning moment.
A gantry’s coverage is a rectangle — trolley travel across the beam, crane travel along the floor — and the rectangle relocates. It stands on its own legs with no building attachment, which is why a portable aluminum gantry crane can serve a pump today, a mezzanine bay tomorrow, and a different site next month.
Where the jib crane wins
Honest comparison first: for a single high-duty workstation, the jib is the right machine.
- Repetitive lifts at one station. Machine tending, weld-station part handling, loading one lathe all shift — the jib is always there, always rigged, zero setup per lift.
- Zero floor footprint in the work zone. The mast stands outside the work envelope; there are no legs to plan around.
- High duty cycles. A permanently installed, motorized jib shrugs off continuous duty that would make crane setup time the bottleneck.
Where the gantry wins
- The lift point moves. Different machines, bays, buildings, or customer sites — one crane, everywhere, instead of a jib at every station.
- No structural attachment. Leased buildings, landlord restrictions, or floors that can’t take a moment-resisting foundation. A gantry needs sound level floor, nothing else.
- Long or awkward loads. The beam straddles the load; the trolley traverses it. A jib handles what fits its circle and capacity at radius.
- Loaded travel. Designed-for-it gantries roll with the load suspended — pick once, roll to the destination, set down. A jib pivots; it never travels.
The third option people forget
If your instinct says “jib” but the fixed installation is the problem, look at a socket-mounted davit crane. Like a jib, it pivots around a fixed point and sweeps a working circle. Unlike a jib, the crane itself is portable — you anchor small sockets at each lift point and carry one davit between them. For pump stations, hatches, and multi-point maintenance routes, the davit-and-socket system covers the jib’s use case with the gantry’s portability logic.
Side by side
| Jib crane | Portable gantry crane | |
|---|---|---|
| Coverage | Fixed circle around the mast | Rectangle that relocates with the crane |
| Installation | Permanent — foundation or column connection | None — freestanding on casters |
| Building requirement | Foundation or structure rated for overturning moment | Sound, level floor rated for the load |
| Relocating it | Civil work; effectively fixed | Roll it, or break it down and move it |
| Loaded travel | No — rotation only | Yes, on designed-for-it cranes, per the manual |
| Best duty pattern | Continuous lifts at one station | Distributed lifts across locations |
How to decide
- Will 80% of lifts happen inside one circle of floor, indefinitely? → jib.
- Does the lift point move between machines, bays, or sites? → gantry.
- Fixed lift points, plural, spread across a site? → davit and socket network.
- Can’t attach to the building or pour a foundation? → gantry (or davit, where sockets can anchor).
Sizing a gantry after deciding: the capacity selection guide covers capacity, lift height, and span across the 1,100 to 22,000 lb line.
Frequently asked questions
Is a gantry crane cheaper than a jib crane?
The crane price is only part of the comparison — the jib adds an engineered foundation or column connection and installation, and it serves exactly one location. Where lifting is distributed, one portable gantry frequently replaces what would otherwise be several jib installations.
Can a gantry crane do a jib crane’s job?
For distributed or occasional lifting, yes — and it also covers every other location. For a single continuously-worked station, the permanently rigged jib is the better tool; setup time and floor space favor it there.
What’s the difference between a jib crane and a davit crane?
Both pivot around a fixed point. A jib is a permanent installation; a davit crane drops into an anchored socket and travels between sockets — one crane serving many fixed points instead of one crane welded to one.
eme has been engineering lightweight and portable lifting equipment since 2003.