How Ski Lifts Work: Chairlifts, Gondolas, T-Bars and Trams
A lift is a loop of moving cable and a set of tradeoffs between speed, capacity, cost and wind. Knowing which is which changes how you ski a mountain.
Every ski lift is the same idea: a steel cable running in a loop between two terminals, driven by a motor at one end and kept under tension at the other, with things attached to it that carry people uphill. Everything else — the speed, the capacity, the price, whether it runs in a gale — follows from how those things are attached.
Fixed-grip versus detachable
This is the distinction that matters most, and it explains almost every difference you notice between lifts.
- Fixed-grip
- The chair is clamped permanently to the cable. It moves at cable speed everywhere, including through the station, so the cable has to run slowly enough that you can get on. Cheap to build, cheap to run, slow.
- Detachable
- The chair releases from the cable in the terminal, slows to walking pace on a rail while you board, then re-grips and accelerates. The cable can run two or three times faster. Expensive to build, expensive to maintain, and the reason a modern lift feels so different.
A fixed-grip quad might run at 2.3 metres per second; a detachable six-seater at 5 or more. On a long lift that is the difference between an eleven-minute ride and a four-minute one, which over a day is an extra run or two.
The types, and what each is for
| Type | Typical capacity (people/hour) | Best at | Weakness |
|---|---|---|---|
| Magic carpet | No real limit, very short | Absolute beginners, nursery slopes | Covers almost no vertical |
| Rope tow / handle tow | 300–800 | Cheap uphill on short slopes | Tiring; hard on gloves and arms |
| T-bar / poma | 600–1,200 | Wind, glaciers, steep uphill terrain | Hard to ride as a beginner; snowboarders dislike them |
| Fixed-grip double/triple/quad | 1,200–2,400 | Low-traffic terrain, cold budgets | Slow |
| Detachable quad / six-pack | 2,400–3,600 | Main mountain arteries | High capital and maintenance cost |
| Detachable eight-seater | 3,600–4,500 | Very high-volume base lifts | Enormous cost; needs the traffic to justify it |
| Gondola | 2,000–4,000 | Weather protection, non-skier access, long spans | Slower loading; you take skis off |
| Aerial tram / cable car | 500–1,500 | Huge vertical in one span, iconic terrain | Low capacity; everyone waits for the next cabin |
| Funitel / 3S | 3,000–4,000 | Extreme wind resistance at altitude | Among the most expensive lifts built |
The capacity column is the one that decides your day. A resort can have twenty lifts and still have queues if the wrong ones are fast.
Why some lifts close in wind and others do not
A chairlift hangs from a single cable and swings. Once the wind pushes a chair far enough sideways, the grip or the sheave assembly at the tower is at risk, so operations stops the lift — typically somewhere around 60–80 km/h sustained, depending on the installation and the exposure.
Gondolas do a little better because the cabins are heavier and lower-slung. The systems built specifically for wind — funitels and 3S lifts, which run on two or three parallel cables spaced apart — resist it dramatically better and keep running when everything above the treeline has shut. That is why you find them on exposed high-altitude links where closing the lift closes half the resort.
Surface lifts are the other wind-proof answer: a T-bar cannot be blown off a cable it is not hanging from. This is why glacier skiing and very high terrain still run on drag lifts long after the industry moved on from them.
What happens when a lift stops
Lifts stop constantly and almost all of it is routine — someone falls at the loading gate, a child cannot get off, a ski drops. The operator hits a stop, sorts it out, and restarts. If you are hanging in the air for a few minutes, that is what happened.
A longer stop usually means a power interruption, in which case a diesel backup engine takes over and drives the lift slowly to unload everybody. Evacuation by rope is the last resort, rehearsed by patrol every season and used very rarely.
Riding them better
- On a busy day, ride the fixed-grip lifts. Everyone queues for the fast ones, so the slow chair next door often has no line and gets you the same run.
- Singles lines exist because a four-seat chair leaving with two people on it is wasted capacity. Using one is doing the lift operator a favour, and you will be at the top far sooner.
- Gondolas are where you go when it is snowing hard or blowing. You are out of the weather for ten minutes and warm at the top.
- T-bars: stand, do not sit. It is a drag lift, not a seat. Let it pull you.
- The first lift of the morning is the whole reason to be early. Fresh grooming, no queue, and on a snow day it is the difference between a great morning and an average one.
What a lift costs a resort
A modern detachable lift is a multi-million-dollar capital project before you account for the survey work, the tower foundations, the power supply and the years of permitting. It then costs money every single day it runs: electricity, a crew at both terminals, daily inspection, and a maintenance programme dictated by regulation rather than by preference.
This is why resorts replace lifts so slowly, and why a lift upgrade is announced with the fanfare normally reserved for a new hotel. It is also why a resort will leave an old fixed-grip chair running for thirty years on terrain that does not generate enough traffic to justify the replacement.
Where that money comes from is the subject of how ski resorts actually make money.
Lift placement is the real skill
Anyone can add a lift. The interesting question is where. Put a fast lift at the bottom of a popular run and you move the queue from the lift to the run itself, and the run gets skied out by ten. Put one on terrain nobody wants and you have spent a fortune on an empty chair. Put two fast lifts feeding one slow one and you have built a bottleneck that everybody blames on the slow lift.
Getting that balance right — capacity that matches the terrain it serves, and terrain that can absorb the people the lift delivers — is the central puzzle of designing a mountain, and it is exactly what you spend your time on in our ski resort game.
Common questions
What is the difference between a fixed-grip and a detachable chairlift?
A fixed-grip chair is clamped permanently to the cable and moves at one speed, so the cable must run slowly enough to board. A detachable chair releases in the terminal, slows for loading, then re-grips — letting the cable run two to three times faster.
Why do ski lifts close in high wind?
Chairs hang from a single cable and swing sideways in wind, which risks the grip and the tower assemblies. Most chairlifts stop somewhere around 60–80 km/h sustained. Gondolas tolerate more, and multi-cable lifts such as funitels and 3S systems tolerate far more.
Which ski lift has the highest capacity?
Detachable eight-seat chairlifts and large gondolas move the most people, around 3,600–4,500 per hour. Aerial trams look impressive but carry far fewer, typically 500–1,500 per hour.
Why do ski lifts stop suddenly?
Almost always because someone had trouble loading or unloading and the operator pressed the stop. It restarts within a minute or two. Longer stops usually mean a power interruption, after which a backup engine drives the lift slowly to unload.
How much does a ski lift cost?
A modern detachable chairlift is a multi-million-dollar project before permitting, foundations and power supply, and then carries daily costs for electricity, crew and mandated inspection. That is why resorts replace lifts slowly.