2-post lifts

A 2-post lift opens up the whole underbody

What is a 2-post lift? A lift with two posts and four lifting arms, under which wheels, wheel arches, sills and underbody are all exposed at once. Whether it fits your garage comes down to ceiling height, power supply and floor, not the tonnage on the rating plate.

2-post lifts are vehicle lifts with two lifting posts, each with two arms that pick the car up at the lifting points specified by the vehicle manufacturer. The wheels hang free, and brakes, wheel arches, sills and the middle of the underbody are all reachable at the same time. Within this design, models differ in three points: drive, how the posts are connected and the shape of the lifting arms. How it compares with scissor lifts and other lifting gear is covered in the car lifts overview.

• Ceiling height from 2,800 millimetres. According to the data table, the C-2.30 screw lift gets by with 2,800 mm of required ceiling height, the standard hydraulic models need 3,100 to 3,150 mm, and the tall SJC-10XL – 4.5M version as much as 4,800 mm. So before any model comparison, you know which lifts your ceiling even allows.
• 230 or 400 volts. Three hydraulic models run on a single-phase 230-volt supply. The C-2.30 screw lift, the Autolift 6.0 and both SJC-10XL need three-phase power at 400 volts. If you don't have three-phase in your garage, that narrows the choice in one step.
• 3,000 to 6,000 kilograms lifting capacity. The range runs from the C-2.30 at 3,000 kg to the Autolift 6.0 at 6,000 kg. In between sit the 4,000 to 4,500 kg lifts for cars and small vans.

Detailing1's tip from the shop: From what we see day-to-day, we know of a lift order that was cancelled because it only turned out afterwards that the lifting height wasn't enough for the planned work. The data table lists three heights that are easily mixed up: post height, required ceiling height and maximum lifting height. For the 4.2A those are 2,830, 3,100 and 1,920 mm. Check the ceiling height against your room and the lifting height against the working height you need under the car.

Two posts and four arms open up the middle of the car

With the car on the ground, you only reach wheel arch, sills and the middle of the underbody on your knees and one after the other, whereas a two-post lift raises it at four lifting points and exposes everything at once.

For detailing, that's the decisive difference. Washing out wheel arches, cleaning brake calipers and wheel insides, checking the underbody protection: on two posts you do it standing up, with both hands free and light from below. The arms swing under the car, and the rubber-padded lifting pads sit at the points the vehicle manufacturer approves in the handbook. On the SJC-10XL, C-2.30 and C-2.40, the pads are also height-adjustable.

One figure that easily gets lost in the data sheet is the minimum pick-up height. It tells you how low arm and lifting pad are when they swing under the car. What that means for you: the lower your car sits, the more this value matters. The 4.2A and the C-2.30 come in at 90 mm, the QSD-4000A at 95 mm, the SJC-10XL at 105 mm and the Autolift 6.0 at 120 mm.

The middle of the underbody is where this design shines. On a scissor lift the car sits on pads above the scissor frame, and opinions in DIY mechanic forums differ, depending on the car, on how well exhaust, gearbox or wishbones can then be reached. On two posts, the space between the axles stays open. If you mainly work on wheels and sills, scissor lifts are the post-free alternative.

Hydraulic or screw drive decides power supply and maintenance

Electro-hydraulic 2-post lifts raise with one hydraulic cylinder per post, screw lifts with one electric motor, a threaded spindle and a load nut per post, with no hydraulic oil in the lifting system at all.

On the hydraulic design, a power unit pushes oil into the lifting cylinders of both posts. To keep both carriages running at the same height, a wire rope synchronisation on the TW242M-230 couples the sides mechanically. This synchronisation keeps both carriages level, according to Twin Busch even with unevenly loaded cars. Mechanical safety latches engage as you lift. At working height you lower the car onto the latch, and then the mechanics carry the load instead of the oil pressure.

The 2-post screw lift works electromechanically. The load nut runs on the vertical threaded spindle like a nut on a bolt and carries the carriage with the lifting arms. Put simply: there's no cylinder that can leak and no hydraulic oil to change. In return, spindle and load nut need greasing as specified by the manufacturer, and the load nut is a wear part. On the C-2.30, according to the manufacturer, Weber makes its condition visible with a mechanical wear indicator, so checking it takes one glance.

Both drives come at a price in everyday use. The C-2.30 screw lift needs three-phase power at 400 volts and two motors of 2.5 kW each, because each post has its own electronically synchronised drive. The hydraulic 4.2A runs at 2.2 kW on 230 volts. In DIY mechanic forums the screw drive gets discussed for its greasing and load nut, while hydraulics are described as convenient and quick. The oil for hydraulic lifts is specified by the lift manufacturer, and the grades are under hydraulic oil.

Where the posts are connected decides the ceiling height you need

Whether the posts are connected at floor level via a floor plate, at the top via an overhead gantry or not at all decides the required ceiling height and whether you get a clear floor.

Weber's standard hydraulic models, meaning QSD-4000A, 4.2A, SJC-10XL and Autolift 6.0, run the connection along the floor. Lines run under a flat plate between the posts, 42 mm high on the QSD-4000A, 60 mm on the Autolift 6.0. That keeps their posts low, between 2,830 and 2,870 mm, and the required ceiling height sits at 3,100 to 3,150 mm. The price is a flat edge on the floor that wheels, creeper and parts trolley have to roll over.

Gantry-style, clear-floor versions connect the posts at the top and keep the floor free. That costs height: Twin Busch quotes a post height of 4,300 mm for one such model. The SJC-10XL – 4.5M also demands a lot of height, the tall version of the SJC-10XL with 4,530 mm posts and 4,800 mm required ceiling height at the same capacity. How to work out the usable height above your floor space is explained in the lifts overview.

The C-2.30 and C-2.40 screw lifts do without a fixed connection. Their motors are electronically synchronised, so there's neither plate nor crossbeam, and the post spacing can be adapted to the room. With a post height of 2,550 mm, the C-2.30 only needs 2,800 mm of ceiling height. Both posts are turned by 30° so the car doors can open wider. We've been asked why the posts stand at an angle too: the rotation is intentional, not an installation error.

The second geometry question concerns the lifting arms. Asymmetric arms are short at the front and long at the back, so the car sits further back between the posts and the front doors open wider. The QSD-4000A, 4.2A, C-2.30 and SJC-10XL work this way. The C-2.40 has symmetric, double-telescopic arms, where the car sits centred between the posts.

No foundation doesn't mean no load-bearing floor

A 2-post lift without a foundation usually means: without a specially poured foundation. The existing floor slab still has to meet what the manufacturer specifies for that particular model.

The requirements are in the data table or product description. For the SJC-10XL, Weber requires C20/25 concrete, double reinforced, with minimum dimensions of 4,000 × 2,000 × 200 mm. For the TW242M-230, Twin Busch recommends a reinforced concrete slab of at least 200 mm in the same grade. Manufacturers quote different values for other models, and what counts is always the installation manual of the lift you're buying.

A floor plate doesn't change any of that. It protects the lines between the posts when driven over, but it doesn't replace anchoring. The forces run through the post bases and heavy-duty anchors into the concrete, which is why fixing is the real work when you install it yourself. Why screed doesn't count for this and what matters with anchors and edge distance is covered in the lifts overview. Know your floor build-up before you buy instead of guessing it.

In use, positioning is what counts. The lifting points are in the vehicle handbook, according to DGUV guidance the heavier side of the car goes on the short arms, and all four pads have to be in contact before the wheels leave the ground. After a short lift comes the shake test. On your first car this alignment takes noticeably longer than later on, that's just part of it. The individual steps are in the step-by-step guide on this page.

Maintenance follows the drive. The Twin Busch manual for the TW242E lists daily checks of connections, hydraulics, arm locks and safety latches, monthly inspection and greasing of carriages, pins, arms and steel cable, and an annual oil and filter change. With the screw lift, the load nut takes centre stage. The legal inspection requirement for commercial use is covered in the lifts overview.

Klassik and Profi run on 230 volts, Expert covers the special cases

The range includes three Weber series and one Twin Busch line: Klassik and Profi on a 230-volt supply, Expert for screw lifts, tall versions and long vans, plus the TW242M-230 from the BASIC LINE.

The entry point is the Weber-Werke "QSD-4000A" Weber-Klassik-Serie: electro-hydraulic, 4,000 kg, asymmetric two-piece telescopic arms, 1,980 mm lifting height and 95 mm minimum pick-up height, 230-volt supply. According to the data table in the shop, it needs 3,100 mm of ceiling height. The safety latches release automatically, and an overload valve and pipe rupture protection are part of the kit.

One step up is the Weber-Werke 2-Säulen Hebebühne "4.2A" Weber-Profi-Serie with 4,200 kg. It also runs on 230 volts, has three-piece asymmetric arms for wide door opening angles and a finely toothed arm lock that releases automatically or by hand. At 4,200 kg, it shares the highest capacity among the 230-volt models on this page with the TW242M-230.

The Twin Busch "TW242M-230" (BASIC LINE) is the second 4,200 kg lift on a 230-volt supply. You release its safety latches semi-automatically from the control panel instead of walking to the post. Lifting height 1,900 mm, drive-through width 2,850 mm, ceiling from 3.1 m according to the manufacturer. It comes in blue, anthracite and fully galvanised, with the galvanised version intended for unheated spaces where road salt comes in.

For long vans, the Weber-Werke 2-Säulen Hebebühne "Autolift 6.0" Weber-Expert-Serie is the one: 6,000 kg, 400 volts, 3 kW, double-telescopic arms from 980 to 1,800 mm. The Weber-Werke 2-Säulen Hebebühne "SJC-10XL" Weber-Expert-Serie carries 4,500 kg, lifts to 2,060 mm and comes with a set of pad extensions, four at 100 mm each. If you're tight on height, you'll end up with the Weber-Werke 2-Säulen Spindel-Hebebühne "C-2.30" Weber-Expert-Serie or the Weber-Werke 2-Säulen Spindel-Hebebühne "C-2.40" Weber-Expert-Serie with 4,000 kg.

Room, power and vehicle decide which lift fits

Which 2-post lift fits is decided by three values in a fixed order: the clear ceiling height, the available power supply and the heaviest or longest vehicle that's going to stand on it.

If the lowest structural element above your floor space is under 3.1 m, the C-2.30 at 2,800 mm is what's left among the models with a stated ceiling height. If you only have 230 volts, the choice narrows to QSD-4000A, 4.2A and TW242M-230. If you're lifting heavy, long vans, the road leads to the Autolift 6.0 with 6,000 kg. If both remain open, arms and features decide.

Some jobs are better solved by a different design. If you mainly work on wheels and sills and don't want posts next to the doors, scissor lifts are worth a look. If access from one side of the car is enough and space is tight, the 1-post lifts page explains what a single post can do. For swapping wheels twice a year, a trolley jack with axle stands from the car jack range is enough.

One question from a DIY mechanic forum gets to the heart of it better than any tonnage figure: can I still get out of the car between the posts? The poster was planning in a narrow barn and wanted to settle that before choosing a model. The data tables give the answer. Installation width ranges from 3,315 mm on the C-2.30 to 3,755 mm on the SJC-10XL, and drive-through width, according to the Weber data tables, from 2,320 to 2,570 mm.

The posts stand level with the front doors. That's why in a tight space width and door clearance decide, not tonnage: asymmetric arms push the car back, rotated posts give the doors room. So before you buy, measure between the walls too and open the driver's door in your head. A lift you can't climb out of will lift any weight and still be the wrong one.