A Traveller Hoist is an overhead lifting device that combines a chain or wire-rope hoist with a wheeled trolley running along the lower flange of an I-beam, letting an operator both lift a load vertically and move it horizontally along the beam. The configuration was standardised in British mill practice through firms like Herbert Morris Ltd of Loughborough in the late 1800s. The trolley wheels grip the beam flange while the hoist body hangs below, so a single hookpoint serves an entire bay. Modern units handle 250 kg to 50 tonnes on standard S-beam or wide-flange track.
Traveller Hoist Interactive Calculator
Vary load, hoist mass, impact factor, and wheel count to see the point load each trolley wheel applies to the beam flange.
Equation Used
The wheel load is the factored hoist-plus-hook mass converted to force and divided by the number of trolley wheels. Use it as the starting point for checking flange bending, flange crushing, runway beam deflection, and end stops.
FIRGELLI Automations - Interactive Mechanism Calculators
- Load is shared equally by all trolley wheels.
- Mass inputs are converted to force using g = 9.81 m/s2.
- Impact factor covers hoisting shock but not beam dynamic analysis.
- Beam flange bending, deflection, and end stops must be checked separately.
How the Traveller Hoist Actually Works
The Traveller Hoist does two jobs in one frame. The trolley — sometimes called a beam trolley or I-beam trolley — carries 4 flanged wheels that ride on the underside of an overhead runway beam. The hoist body bolts or pins to the trolley's load lug, hanging directly below. Pull the load chain and the hook climbs. Push the load (or pull a separate hand chain on a geared trolley) and the whole assembly rolls along the beam. That gives you a 2-axis work envelope from one fixed structural member, which is why every traditional machine shop, foundry bay, and rail workshop you walk into has at least one of these running down the centreline of the building.
The wheel-to-flange fit is what makes or breaks the unit. Beam flange width must match the trolley's adjustable side plates within about 1.5 mm — too tight and the wheels bind, too loose and the trolley skews and climbs one flange edge. The wheel tread profile is machined with a slight crown to keep the trolley centred under load. If you notice the trolley hunting side-to-side or one wheel squealing, the side-plate spacing is wrong or the beam flange is tapered (older S-beams have an 8° flange taper, modern wide-flange W-sections are nearly flat — the wheel must match). Get this wrong and the trolley will derail under a swinging load, which is the failure mode that has historically killed more riggers than chain breakage.
The hoist itself is usually a hand chain block, a lever hoist, or an electric chain hoist with rated load capacity stamped on the body. The chain runs through a load sheave with a pawl-and-ratchet brake (Weston-style) or a disc brake on electric units. Overload protection is a friction clutch set at roughly 125% of rated load — if you cannot lift, that clutch is doing its job and you are over-spec.
Key Components
- Trolley side plates: Two parallel steel plates that carry the wheel axles and bolt together with spacer washers to set the gauge to the beam flange width. Spacing tolerance is ±1.5 mm; outside that range the trolley either binds or rocks. Plates are typically 8-12 mm rolled steel for capacities up to 5 tonnes.
- Flanged trolley wheels: Cast iron or forged steel wheels with a crowned tread and inboard flanges that grip the beam's lower flange. Wheels run on sealed ball bearings or bronze bushings rated for the full hook load plus impact factor of 1.25.
- Load lug / suspension bolt: The single pin or eye bolt at the trolley's centreline that the hoist hangs from. Sized so the safe working load matches the hoist rating — a 2-tonne hoist on a 1-tonne trolley is a deadly mismatch and we see it on auction-bought rigs constantly.
- Hand chain block or electric hoist: Provides the vertical lift through a load sheave, gear reduction (typically 30:1 to 60:1 on hand units), and a Weston-pattern automatic brake. Rated lift speeds run 0.3 to 8 m/min depending on motor and reduction.
- Beam runway: The structural member the trolley rolls on. Standard S-beam (American Standard) has tapered flanges; W-beam and patent track have parallel flanges. Beam must be designed for the rolling point load plus deflection limited to L/450 to keep the trolley from running uphill at a sag.
- End stops: Bolted or welded steel blocks at each end of the runway. Without them the trolley rolls off the beam end — this is not theoretical, it happens 2-3 times a year in workshops we hear about. Stops must be rated for full impact at maximum traverse speed.
Who Uses the Traveller Hoist
Anywhere a fixed overhead beam runs the length of a workspace, a Traveller Hoist is the cheapest way to get crane-like coverage without a full bridge crane. The mechanism shines in narrow bays, single-line workflows, and refit jobs where you cannot justify a powered overhead travelling crane but still need to move 500 kg to 10 tonnes repeatedly. You will find them in heavy industry, but also in surprisingly small operations — a 1-tonne unit sits in most independent diesel workshops in the country.
- Locomotive maintenance: Above the inspection pits at the Severn Valley Railway Bridgnorth works, twin 5-tonne Morris hand-chain travellers lift driving wheel sets clear of axle boxes during overhaul of GWR Manor-class locomotives.
- Wind turbine nacelle service: Each Vestas V90 nacelle includes an internal monorail beam with a 1-tonne Stahl chain traveller for swapping yaw motor gearboxes and pitch cylinders 80 m above ground without a mobile crane callout.
- Brewery cellar work: At Fuller's Griffin Brewery in Chiswick, a 500 kg geared trolley hoist runs along the cellar overhead beam to swap 70 kg cask shives and lift sediment-laden firkins out of the racking.
- Aluminium die-cast tool change: Buhler 840-tonne cold-chamber machines at Ryobi Die Casting use ceiling-mounted 3-tonne electric travellers to slide 2.4-tonne die halves between the press and the prep bench.
- Boatyard rigging: Spencer Rigging in Cowes uses a 2-tonne Yale Pul-Lift on a beam traveller running the length of the mast shed to lower 18 m carbon spars onto cradles for rig tuning.
- Mine shaft headframe: Underground at the South Crofty tin mine recovery project in Cornwall, a 10-tonne Konecranes electric chain traveller lifts cage frames and ventilation duct sections within the headframe steelwork.
The Formula Behind the Traveller Hoist
The single calculation that decides whether your Traveller Hoist install is safe is the wheel load on the beam — the point load each trolley wheel applies to the beam flange. At the low end of typical operating range (a 250 kg parts-bin hoist on a workshop joist) wheel loads are trivial and almost any S6×12.5 will hold. In the nominal range (1-3 tonnes on a 6 m bay) wheel loads start to govern beam selection and you must check both flange bending and beam deflection. At the high end (10+ tonnes on long spans) the wheel load drives flange-edge crushing and you usually need a patent track section with a hardened lower flange. The sweet spot for hand-pushed travellers sits around 1-2 tonnes on a 4-6 m beam — heavier than that and you want a geared traverse or motorised drive because pushing a 5-tonne load by hand needs about 25 kg of starting effort and takes the operator out of safe working posture.
Variables
| Symbol | Meaning | Unit (SI) | Unit (Imperial) |
|---|---|---|---|
| Pwheel | Load applied by a single trolley wheel to the beam flange | kN | lbf |
| Whoist | Self-weight of the hoist plus trolley assembly | kg (×9.81 for N) | lb |
| Wload | Rated working load suspended from the hook | kg (×9.81 for N) | lb |
| IF | Impact factor for hoisting (1.25 typical, 1.5 for sudden start/stop) | dimensionless | dimensionless |
| nwheels | Number of trolley wheels in contact (4 for standard plain trolley) | count | count |
Worked Example: Traveller Hoist in a glass furnace electrode change
A specialty borosilicate glass plant in Charleroi, Belgium is fitting a Traveller Hoist over a 7 m runway beam to lift and shuttle 1500 kg molybdenum bottom electrodes during furnace rebuilds. The hoist body is a Yale CPV 2-tonne electric chain unit weighing 95 kg, mounted on a 4-wheel push trolley weighing 38 kg. Engineering needs to confirm the wheel load on the existing S10×35 runway beam to validate the rebuild plan.
Given
- Wload = 1500 kg
- Whoist+trolley = 133 kg
- IF = 1.25 dimensionless
- nwheels = 4 count
Solution
Step 1 — at nominal 1500 kg lift, sum the suspended mass:
Step 2 — convert to force in kN and apply the 1.25 impact factor:
Step 3 — divide across the 4 wheels to get the nominal per-wheel load:
That is comfortably inside the 8 kN per-wheel allowable for an S10×35 flange in localised bending, so the existing beam holds. Now check the operating-range envelope. At the low end — lifting an empty 200 kg sling tray during prep — the per-wheel load drops to:
The trolley rolls almost freely at this load and the beam barely deflects — you can push the assembly along the 7 m run with 2-3 kg of finger pressure. At the high end, if a future furnace upgrade calls for the full 2-tonne hoist rating:
Still under the flange limit, but now beam deflection at midspan reaches roughly L/420 — past the L/450 rule of thumb — and the trolley will perceptibly want to roll downhill toward the centre of the beam. You will feel that as the operator having to brace against the load on a long traverse.
Result
Per-wheel load at the nominal 1500 kg electrode lift comes out to 5. 01 kN, which sits the S10×35 runway beam at roughly 63% of its flange-bending allowable — a safe working margin for repeated furnace rebuild cycles. Across the operating range the wheel load swings from 1.0 kN unloaded to 6.5 kN at full hoist rating, and the sweet spot for hand-pushed traverse sits below about 5 kN where the beam stays flat enough that the trolley does not drift toward midspan. If your measured wheel load comes back higher than predicted — say you instrument a strain gauge and read 7 kN at 1500 kg — check first for shock-load events from a snatched lift (the impact factor jumps to 1.5+ if the operator slams the up-button at a slack chain), second for an off-centre hookpoint pulling the load lug into a moment that overloads the leading wheel pair, and third for a worn or seized trolley wheel bearing forcing one diagonal pair to carry 60-70% of the load instead of an even 25% each.
Traveller Hoist vs Alternatives
The Traveller Hoist sits between a fixed-point chain block and a full bridge crane. Picking the right one comes down to how far you need horizontal coverage, how often you traverse, and what you are willing to spend on structural steelwork. Here is how the three stack up on the dimensions that actually matter when you are speccing a workshop.
| Property | Traveller Hoist | Fixed Chain Block | Bridge Crane |
|---|---|---|---|
| Horizontal coverage | 1D — along beam length, typically 4-30 m | 0D — single fixed lift point | 2D — full bay, 6×30 m typical |
| Load capacity range | 250 kg to 50 t | 100 kg to 100 t | 1 t to 500 t |
| Traverse speed (hand) | 10-20 m/min push | n/a | n/a (powered only) |
| Installed cost (5 t, 10 m bay) | £3,000-£8,000 | £400-£1,200 | £25,000-£70,000 |
| Structural requirement | Single I-beam, deflection L/450 | Single padeye or ring | Twin runways + endcarriages + columns |
| Maintenance interval (LOLER) | 12 months thorough exam | 12 months thorough exam | 12 months + monthly powered checks |
| Operator skill | Basic rigger competency | Basic rigger competency | Trained crane driver / pendant licence |
| Best application fit | Linear workflows, machine bays, lathe lines | Fixed engine pulls, mast steps | Heavy fab shops, foundries, steel mills |
Frequently Asked Questions About Traveller Hoist
Almost always the side-plate spacing is set 2-3 mm too wide for the actual flange width. The trolley sits cocked on the beam, one wheel pair takes most of the load, and as you push it walks up the high-side flange until a flange root catches it. Pull it down, measure the beam flange with calipers (not a tape), and reset the spacer washers so the wheel flanges sit 1-1.5 mm clear of the beam edges on each side. If the beam is an old S-section with 8° tapered flanges, the trolley wheels must have a matching tapered tread — a flat-tread W-beam wheel on a tapered S-beam will always climb.
L/450 is a working limit for static appearance, not a roll-stability limit. Even at L/450 the beam slopes about 0.13° at the quarter-points, which is enough that a free-rolling trolley with sealed bearings and a 1500 kg load will overcome static friction and drift. Two fixes: spec a geared trolley (the worm reduction is self-locking and will not back-drive), or tighten the deflection limit to L/600 if you genuinely need the trolley to park anywhere on the beam unattended. Most shops just accept the drift and use the geared trolley above 1 tonne.
Push trolley if you traverse fewer than 10 times a shift and the load is under 1 tonne — fast, cheap, no chain to manage. Geared hand trolley above 1 tonne or if the beam has any sag, because the hand chain gives you controlled positioning and the worm gear holds position. Electric trolley if you traverse continuously, if the operator has to hold a pendant for the hoist anyway, or if the run exceeds about 8 m where pulling a hand chain back and forth becomes the slowest part of the cycle. For a 2-tonne hoist on 6 m the geared hand trolley is the default unless you have power and pendant control already.
Probably not. The overload friction clutch is set at the factory to slip at roughly 125% of rated load, so a brand new 2-tonne unit refusing to lift 2 tonnes means either (a) the actual load is more than you think — load cells regularly show 15-20% more than the operator's estimate when slings, spreader bars, and below-the-hook attachments are added in, or (b) the chain is two-falls and you are reading the hook capacity as the chain capacity. Weigh the load with a dynamometer before calling the clutch faulty. Adjusting the clutch yourself voids LOLER certification.
That stutter is almost always beam splice plates or flange-edge weld spatter the wheels are bumping over. On a runway built from two or three beam sections joined with bolted splice plates, the splice will protrude 1-3 mm below the flange unless it was ground flush during install. Run a straightedge along the underside of the lower flange — any step over 0.5 mm will telegraph through the wheels at 2-tonne load. Grind the splices flush, or fit a transition ramp. A second cause is grit and weld slag on the flange tread, especially in fab shops; a wire brush along the flange clears it.
That is a snatched lift and the dynamic load can spike to 2.0× to 2.5× the static load — the chain goes from zero tension to full load in milliseconds and you get a transient force well above the 1.25 design impact factor. For routine hoist sizing you stick with 1.25 because operators are trained to take up slack first, but for beam fatigue analysis on heavily-cycled installations (think production die change, 50+ lifts per shift) you should design the beam to 1.5 and post a no-snatch sign at the pendant. If you have already commissioned the beam to 1.25 and the operators routinely snatch, you will see the splice bolts loosening within 6 months — that is your warning sign.
References & Further Reading
- Wikipedia contributors. Hoist (device). Wikipedia
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