Vehicle Hoist Guide: 2-Post, 4-Post, Scissor & In-Ground Lifts Explained

For chemical anchor installation (Chemset, resin chemistry, AS 5216), see the chemical anchor guide.

A vehicle hoist is the single most transformative piece of equipment in any mechanical workshop. Safe, repeatable access to a vehicle's undercarriage — without crawling under stands, without a pit, without the risk of a floor jack dropping — changes the pace and safety of every job it touches. The right hoist also determines what work you can take on, how fast you can turn vehicles around, and whether your floor space is working hard or standing idle.

This guide covers every major type of vehicle hoist sold in Australia: 2-post, 4-post, scissor, in-ground, and mobile column. It explains capacity selection, ceiling height calculations, concrete requirements, Australian plant registration obligations, and how to match the hoist type to your workshop's actual workflow. If you're buying a first hoist or adding capacity, the selection table in the decision guide section is the fastest path to the right answer.

What Is a Vehicle Hoist?

A vehicle hoist — also called a car hoist or car lift — is a powered lifting device designed to raise an entire vehicle off the floor to a working height where a technician can stand upright beneath it. Unlike a floor jack or axle stands, a hoist provides stable, full-vehicle lift with both axles clear of the ground, giving unrestricted access to the entire undercarriage simultaneously.

The term "car hoist" and "car lift" mean the same thing in Australian usage. "Hoist" is the more common term in Australian trade and workshop environments; "lift" is standard in North American product literature. You will see both used interchangeably in manufacturer specifications.

Hoists differ fundamentally in how they support the vehicle:

• 2-post hoists lift by the chassis sills using swing arms — wheels free, undercarriage fully accessible.
• 4-post hoists support the vehicle on drive-on ramps — wheels on the ramp, suitable for storage and alignment.
• Scissor hoists lift from below using a scissor mechanism — compact, quick, suited to tyre and light service work.
• In-ground hoists are recessed into the floor — flush finish, higher installation cost, used in prestige or OEM workshops.
• Mobile column lifts clamp around wheels and operate in sets — suited to commercial vehicles and buses.

2-Post Hoists: Symmetric vs Asymmetric

The 2-post hoist is the most common vehicle lift in Australian mechanical workshops. Two columns are bolted to the floor and connected by an overhead beam (or by a base beam below floor level in some designs). Each column carries two swing arms that extend under the vehicle's chassis lifting points — four arms in total, two per side.

The fundamental mechanical choice is symmetric versus asymmetric arm geometry, and it matters from day one.

Symmetric 2-post hoists

On a symmetric hoist, the front and rear arms on each column are the same length — both reach equally in front of and behind the post. The vehicle sits with its centre of gravity directly between the two columns. This geometry suits vehicles with lifting points distributed evenly along the chassis, making symmetric hoists the right choice for vans, light commercial vehicles, trucks, and any vehicle where the technician does not need to open the doors during service.

Asymmetric 2-post hoists

On an asymmetric hoist, the front arms are shorter than the rear arms. The vehicle is positioned further rearward relative to the columns — typically 30–40% of the wheelbase in front of the post and 60–70% behind it. This moves the B-pillar (the door pillar) away from the column, giving the technician clear access to open and close doors during the service. For passenger car workshops — where opening doors to access seat rails, door check straps, or door jamb labels is a routine part of every service — this is critical.

Arm configuration and lifting points: Both types use four swing arms, and the arms are typically available in two lengths (short and long) with a padded adaptor that contacts the vehicle's sill or chassis jacking point. Correct arm placement is not optional — a vehicle lifted from the wrong point can drop an arm, crack a sill, or tip off the hoist. Always use the vehicle manufacturer's specified lift points for every vehicle. These are shown in the workshop manual and, on modern vehicles, indicated by triangular floor markings.

Overhead beam vs floor plate 2-post hoists

Standard 2-post hoists use a surface overhead beam connecting the two columns at the top. This is the most common and least expensive design. An alternative is the base-plate or floor-plate design where the two columns are connected by a plate recessed into or mounted on the floor — no overhead beam. The floor-plate design allows more overhead clearance for very tall vehicles but requires a precise floor channel or surface-mounted crossbar that can be a trip hazard. Most Australian workshops use overhead-beam 2-post hoists.

4-Post Hoists: Drive-On Platform

A 4-post hoist uses four vertical columns and a pair of drive-on runways — steel ramps that the vehicle is driven onto before being raised. Because the vehicle sits on its wheels throughout the lift, there is no need to locate chassis lifting points, making 4-post hoists faster and safer to load for less-experienced operators. The trade-off is that the wheels are supported, so you cannot do suspension or wheel bearing work without additional jack stands beneath the control arms.

Standard 4-post hoists

Standard 4-post hoists are used for mechanical work that does not require removing wheels — exhaust, gearbox, differential, engine, and general under-body inspection. They are also widely used for vehicle storage: an efficient workshop with 4m+ ceilings can park one vehicle on the hoist and another below, effectively doubling the floor area used for vehicle storage. This makes 4-post hoists popular in mechanical workshops, restoration shops, and prestige car storage facilities.

4-post alignment hoists

A 4-post alignment hoist adds slip plates (turnplates) under the front wheels and rolling bridges under the rear wheels as factory-fitted or bolt-on accessories. The slip plates allow the front wheels to rotate freely in multiple directions during the alignment correction procedure. If wheel alignment is a primary service, specify the alignment hoist variant from the outset — it has a wider platform spacing than standard 4-post hoists to accommodate alignment heads, and the runway geometry is calibrated for level operation.

Scissor and Mid-Rise Hoists

Scissor hoists use a scissor-jack mechanism to lift a vehicle from below — either from a central pad engaging the vehicle's central jacking point, or from side-mounted arms engaging the sills. They are compact, fast to deploy, and do not require the overhead clearance of a full 2-post or 4-post hoist. The trade-off is lift height: scissor hoists reach 600mm–1,200mm, not the 1,800mm+ of a full hoist.

Low-rise scissor lifts (floor-level, up to 600mm)

Low-rise scissor lifts are surface-mounted units that sit on the workshop floor and raise the vehicle 300mm–600mm. At this height a technician can comfortably change wheels, access brake calipers, and reach the exhaust — while kneeling or crouching, not standing. The primary advantage is zero installation — no concrete anchors, no overhead clearance requirement — making them useful in leased premises or multi-purpose spaces. They are also used alongside a 4-post hoist to provide axle access when the 4-post has a vehicle on its runways.

Mid-rise scissor hoists (600mm–1,200mm)

Mid-rise scissor hoists are the tyre shop workhorse. At 900mm–1,200mm, a technician of average height can stand and work comfortably beneath the vehicle. They suit tyre rotations, brake pad changes, exhaust clamp work, and quick oil changes — any job that does not require full-length undercarriage access from below. Mid-rise hoists are typically surface-mounted or flush-mounted into a shallow floor pocket (150mm–200mm recess), and the smaller models require no concrete anchoring.

In-Ground Hoists

In-ground hoists are installed below the finished floor level, with the mechanism housed in a concrete-lined pit. When not in use, the lifting platform is flush with the floor, creating an unobstructed workshop surface. When activated, the platform rises to working height through openings in the floor.

In-ground hoists are favoured in prestige car dealerships, OEM manufacturer showrooms, and luxury restoration workshops where the visual appearance of the floor matters and overhead equipment would compromise the aesthetic. They are also used in some race workshops where complete floor clearance is essential for moving equipment around freely.

Installation considerations: In-ground hoists require significant civil works — a reinforced concrete pit of precise dimensions, waterproofing (the pit must not flood), drainage, and a flush floor finish. This makes them substantially more expensive to install than surface-mounted hoists, and effectively permanent. The pit is difficult and costly to modify or remove. Plan in-ground hoist positions with long-term certainty — they are not the right choice if your workshop layout may change.

Hydraulic seal condition is a key maintenance concern with in-ground hoists: any hydraulic leak drains into the pit and is not immediately visible. Regular fluid level checks and pit inspections are essential.

Mobile Column Lifts

Mobile column lifts are battery-powered, freestanding units that clamp around a vehicle's wheel rim. They are deployed in sets of four, six, or eight columns — one per wheel for a standard 4-wheel vehicle, more for multi-axle trucks and coaches. Each column contains its own hydraulic unit and battery, and the columns communicate wirelessly to synchronise the lift and descent, keeping the vehicle level throughout.

Mobile columns are the standard solution for lifting heavy commercial vehicles — rigid trucks, semi-trailers, buses, coaches, and large equipment — where fixed 2-post or 4-post hoists are impractical due to vehicle wheelbase, width, or weight. They are also used in fleet workshops where different vehicle configurations arrive at the same bay, as the column spacing can be adjusted freely to any wheelbase.

Floor requirements for mobile columns: Mobile columns are not anchored, which means the floor must be level, smooth, and have adequate bearing capacity across the entire area where columns may be positioned. A slight floor slope under a column during a lift creates uneven load distribution — check the floor level before each use. Minimum concrete strength of 25 MPa and a smooth power-floated finish are typically specified.

When not in use, mobile columns are stored on their own wheels against a wall or in a designated rack. This makes them a particularly good option for workshops with limited floor space that need large-vehicle capability on an occasional basis.

Capacity: Matching the Hoist to Your Heaviest Vehicle

Hoist capacity is the maximum rated load the hoist can safely lift. The rating applies to the total vehicle weight — not just one side, not the payload, not the tow ball download. Use the vehicle's Gross Vehicle Mass (GVM) as the reference weight, not its kerb weight. GVM is the maximum loaded weight and is stamped on the compliance plate in the driver's door jamb.

The standard professional rule is to select a hoist rated at at least 25% above the GVM of the heaviest vehicle you will regularly lift. This is not a theoretical safety margin — it's practical load management. A hoist running at 100% of its rating continuously degrades seals, cylinders, and structural components faster than one running at 75%.

Dynamic loading: A vehicle on a hoist is not a static load. As technicians move equipment around, remove heavy components (engine, gearbox), or use tools on the vehicle, the load distribution changes. Hydraulic systems with high-quality safety valves maintain position under these dynamic conditions, but this is another reason not to operate at rated capacity limits.

Ceiling Height Requirements

Insufficient ceiling height is the most common reason workshops buy a hoist that does not work for their tallest vehicles. The calculation is straightforward, but it must be done for each vehicle type you intend to lift — not just a standard sedan.

The formula:

Minimum ceiling height = Vehicle roof height + Hoist lift stroke + 300mm clearance

The 300mm overhead clearance is the minimum working buffer — it keeps technicians' heads away from the ceiling when reaching for high components. For rooftop equipment, antenna blankers, or raised roof vans, allow more.

Note that some overhead beam 2-post hoists have a beam height lower than the nominal ceiling height. Always verify the hoist's installed overhead beam height in the manufacturer's specification drawings — it is sometimes 200–300mm below the column top.

Floor Requirements: Concrete Specification

A vehicle hoist exerts concentrated forces on the floor through its column base plates and anchor bolts. The floor must have adequate thickness, compressive strength, and cure to carry these loads safely. If the floor is inadequate, the anchor bolts pull out — a catastrophic failure mode that has resulted in serious injuries in Australian workshops.

Concrete thickness and strength

The industry standard minimum for a 2-post hoist is a 150mm slab at 25 MPa compressive strength. Many manufacturers specify 200mm at 32 MPa for full capacity hoists or where the slab has any uncertainty. Four-post hoists distribute load across four footplates and are less demanding — some 4-post models are approved for 100mm slabs at 25 MPa.

If your existing slab is thinner than 150mm, you have three options: pour a localised thickened pad around each column base (typically 500mm square × 200mm deep), epoxy-anchor additional reinforcing and pour over the existing slab, or relocate the hoist to an area with adequate slab depth. Option 1 — a thickened pad — is the most common practical solution. Engage an engineer to specify it correctly.

Cure time

New concrete must be allowed to reach its design strength before anchoring bolts. Concrete reaches approximately 70% of its 28-day strength at 7 days and 90%+ at 14 days, but standard practice for structural anchor applications is to wait the full 28 days from pour date before drilling. No exceptions. Drilling into green concrete at 7 days, even if the surface feels hard, creates micro-fractures around the anchor hole that reduce pull-out resistance substantially.

Anchor bolts

Most hoists use chemical anchor bolts (resin-bonded) or expansion anchors into the concrete. Chemical anchors are generally preferred for hoist applications because they perform better in cracked concrete and have higher sustained load ratings. The hoist manufacturer's installation manual specifies the anchor type, diameter, embedment depth, and minimum edge distance from slab edges. Follow these specifications exactly — substituting a different anchor type or reducing embedment depth invalidates the installation.

Checking an existing slab

If you don't know the existing slab thickness or strength, a structural engineer can use a combination of core drilling and testing to assess it. This is a worthwhile investment before purchasing a hoist — the cost of an engineer's slab assessment is minor compared to the cost of purchasing a hoist that cannot be safely anchored to your existing floor.

Australian Standards and Plant Registration

In Australia, vehicle hoists are classified as registered plant under Work Health and Safety regulations. This classification applies in most states and territories and has three practical implications for workshop owners:

1. Plant design registration

Before a vehicle hoist design can be sold or installed in Australia, the manufacturer must register the plant design with the relevant WHS regulator. The design is assessed by an engineer to confirm it meets applicable standards. Once registered, the design is issued a Plant Design Registration Number (PDRN) — a state-issued code that must be recorded in all documentation relating to that hoist model. When purchasing a hoist, ask the supplier for the PDRN before buying. A hoist without a valid PDRN is not legally compliant for use in an Australian workplace.

2. Item of plant registration

After installation, each individual hoist must be registered as an item of plant with the relevant state WHS authority. The registration requires the hoist's serial number, installation address, the design PDRN, installer details, and documentation of the commissioning inspection. Annual renewal or periodic re-registration is typically required. Your hoist installer or a licensed inspector can assist with this process.

3. Annual inspection

Registered plant must be inspected by a competent person — typically a licensed engineer or an authorised hoist inspector — at least annually. The inspection covers structural integrity, hydraulic system condition, safety lock function, electrical systems, and arm/swing arm condition. The inspector issues a written report and, if the hoist passes, updates the plant registration. If defects are found, the hoist must be taken out of service until rectified. Keep all inspection records on file — they are required in the event of a WorkCover or SafeWork audit.

Operator training and safe work procedure

WHS regulations require that operators are competent to use the plant. For vehicle hoists, this means technicians should be trained in correct lifting point identification, load limits, arm placement, safety lock engagement, and the procedure for safely lowering a vehicle in an emergency. A written Safe Work Method Statement (SWMS) for hoist operation is best practice and may be required by your insurance or clients. The hoist manufacturer typically provides an operator manual — this should be readily accessible to all workshop staff.

Power Requirements: Single-Phase vs Three-Phase

Vehicle hoists are hydraulically operated — an electric motor drives a pump that pressurises hydraulic fluid to raise the columns or platform. The motor's power requirements determine what electrical supply the hoist needs.

Three-phase power (415V)

The majority of workshop-grade 2-post and 4-post hoists require three-phase 415V power. Three-phase provides the smooth, sustained torque needed for reliable lifting under full load and allows a compact, efficient motor. Most commercial industrial premises and dedicated workshop buildings have three-phase supply available at the switchboard. If your premises does not have three-phase, you will need to arrange an upgrade through your electricity distributor — this involves a new service connection, switchboard upgrade, and metering change, which adds cost and lead time to the project.

Single-phase power (240V)

Some hoist manufacturers offer single-phase 240V versions of their standard models, particularly in the 2.5T–3.0T range. Single-phase hoists are slower to lift and typically have a lower duty cycle than their three-phase equivalents — they need a cooling period between lifts to prevent motor overheating. For a high-volume workshop turning 10–20 vehicles a day, a single-phase hoist will become a bottleneck. For a small workshop doing 3–5 lifts a day, single-phase is a practical solution that avoids the cost of a three-phase upgrade.

Amperage draw and circuit protection

A typical 2-post hoist motor draws 7–15 amps per phase during lifting, with a brief inrush current (typically 3–5× running current) at motor start. The electrical circuit feeding the hoist must be sized for this demand — a dedicated 20A or 32A circuit breaker per hoist, depending on motor rating, is standard. Run the circuit from the switchboard in conduit with correctly rated cable — do not use an extension lead or share the circuit with other workshop equipment. Consult a licensed electrician for the circuit installation.

Choosing the Right Vehicle Hoist: Decision Guide

The right hoist depends on four factors: your primary vehicle types, your primary service types, your workshop ceiling height, and your concrete slab condition. Work through these in order.

Questions to answer before you purchase:

• What is the GVM of the heaviest vehicle I will regularly lift? (Add 25% — that is your minimum hoist rating.)
• What is the measured ceiling height at the lowest point in the proposed bay? (Run the ceiling height calculation for your tallest vehicle.)
• What is my concrete slab thickness and strength? (If unknown, get it tested.)
• Is three-phase power available at the proposed installation point? (If not, plan the upgrade or choose a single-phase model.)
• Does the hoist have a current PDRN for my state? (Ask the supplier before purchasing.)
• Is professional installation and commissioning included? (Never self-install.)

AIMS stocks a range of vehicle hoists for passenger cars through to light commercial vehicles. Browse the AIMS vehicle hoist range or contact our team for help matching a hoist to your workshop's specific requirements.

Installation and Commissioning

Vehicle hoist installation must be performed by a qualified installer — typically the supplier's installation team or a licensed hoist technician. Self-installation by the workshop owner or a general tradesperson invalidates the plant design registration and voids the manufacturer warranty. The cost of professional installation is typically included in the purchase price of hoists from established Australian suppliers — confirm this before signing a purchase order.

Pre-installation preparation

• Concrete readiness: New slabs must be at 28-day cure. Existing slabs should be checked for thickness and strength if not known.
• Electrical supply: Confirm the dedicated circuit is installed and tested before the installation crew arrives. This avoids delays on the day.
• Bay clearance: The installation bay must be completely clear. The crew needs access to the full footprint of the hoist plus a working perimeter.
• Anchor bolt hole layout: The installer will mark and drill anchor positions using the hoist's installation template. These positions must fall on solid, uncracked concrete — not over existing cuts, drainage channels, or utility conduits.

Commissioning

After installation, the hoist is commissioned — a series of test lifts and safety checks carried out by the installer before any customer vehicle is lifted:

• Test lift with load cells or known-weight vehicle to rated capacity
• Safety lock engagement verification at multiple heights
• Hydraulic pressure check
• Lowering speed check (emergency descent function)
• Arm swing and lock check on all four arms
• Column vertical alignment check

The commissioning report is part of the plant registration documentation — keep it permanently. Some states require the commissioning report to be submitted with the plant registration application.

Installation timeline

From order to first lift, allow 2–6 weeks for delivery and scheduling (longer in peak periods), then 1 day for installation and commissioning on a prepared slab. If a new slab is required, add the 28-day cure period plus the time to organise and complete the pour.

Safety Checks and Maintenance Schedule

A vehicle hoist holds a vehicle weighing 1,000kg–5,000kg above people working beneath it. The maintenance schedule is not optional — it is the difference between a hoist that lasts 20+ years without incident and one that fails during service.

Monthly visual inspection (operator)

• Inspect hydraulic hoses for cracking, swelling, or weeping — especially at fittings and bends
• Check safety locks engage positively at each height detent — test by loading the lift and applying the descent control briefly
• Inspect arm pads for cracking, deformation, or separation — replace if damaged
• Inspect the column finish for impact damage, corrosion, or cracking at welds
• Check the overhead beam (2-post) for impact damage or any visible movement at the column connections
• Confirm the hoist serial number plate is legible and the plant registration is current

Three-monthly lubrication

• Apply grease to all arm pivot pins and bushes — use a grease as specified in the manufacturer manual (typically lithium-based NLGI 2)
• Lubricate column slides and equalization cables or chains
• Check and adjust cable tension (cable-equalised 2-post hoists) if applicable

Six-monthly hydraulic service

• Check hydraulic fluid level and top up if required — use the manufacturer's specified fluid only
• Inspect cylinder seals for weeping
• Check hydraulic pump unit for unusual noise during operation

Annual inspection (competent person — mandatory)

The annual inspection by a licensed engineer or authorised hoist inspector covers all of the above plus a structural integrity assessment of the columns, base plate welds, and anchor bolts, a hydraulic pressure test, and an electrical safety check. The inspector must provide a written report. This report must be retained as part of your plant registration records.

Lockout/tagout procedure

If any fault is identified during a monthly inspection or during operation, the hoist must be taken out of service immediately. Apply a lockout tag to the hoist control and isolate the electrical supply at the dedicated circuit breaker. Do not allow the hoist to be used until the fault has been diagnosed and rectified by a qualified person, and the hoist has been retested. See the Lockout Tagout Guide for procedures.

Common hoist failure modes

AIMS Vehicle Hoist Range

AIMS Industrial stocks a range of vehicle hoists suitable for passenger car and light commercial workshops, from 2-post and 4-post models through to scissor lifts. Our range is selected for Australian workshop conditions — three-phase and single-phase models available, with units carrying current plant design registration for use across Australian states.

Browse the full range at AIMS vehicle hoists, or contact our team directly if you want to talk through the right hoist for your specific workshop setup. We can advise on capacity, ceiling height, floor requirements, and what's involved in getting a hoist registered and commissioned in your state.

For related lifting and workshop equipment, see our Electric Hoist Guide covering chain and wire rope hoists for overhead material lifting, and our Jib Crane Guide for fixed overhead lifting solutions.

Workshop vehicle maintenance frequently involves angle grinding for rust removal, exhaust cutting, and body panel repair. For disc selection, technique, and PPE requirements, see the AIMS Angle Grinder Guide.