Quick answer: Before ordering a two-post lift, confirm four things against the specific model’s installation manual: ceiling height (overhead clear-floor lifts often need around 12 ft or more), bay width, concrete thickness and strength under each column, and the electrical supply for the power unit. Lifts installed outside the manufacturer’s requirements are a safety risk.
1. Ceiling height
Clear-floor lifts have an overhead beam that carries the hydraulic lines and cables and often a shut-off bar. The overall column height, plus clearance for the beam and the vehicle at full rise, sets the minimum ceiling height. Many standard-height clear-floor lifts need roughly 12 ft, while tall or adjustable-height versions need more. Floor-plate lifts have no overhead beam and suit lower ceilings.
Measure to the lowest point above the bay: lights, heaters, garage door tracks and openers, beams and sprinkler pipes.
2. Bay width and length
- Allow for the lift’s overall width plus walking space on both sides of the columns.
- Check the drive-through clearance between columns against your widest vehicle, including mirrors.
- Allow length for the vehicle plus room to walk around it and use workbenches.
- Note the position of doors, drains and floor joints; columns should not sit on joints or cracks.
3. Concrete requirements
Two-post lifts carry the full load through anchor bolts into the floor, so concrete is the most critical requirement. Manufacturers specify a minimum thickness and compressive strength for each model. A common figure for many 9,000–10,000 lb lifts is about 4 in. of 3,000 PSI concrete, while heavier lifts often require 6 in. or more and higher strength. Always use the figure in the manual for your exact lift.
| Check | How to verify |
|---|---|
| Thickness | Drill a small test hole where the column will sit, or check building records |
| Strength | Building records, or have the slab assessed by a professional |
| Age | New concrete needs to cure before anchoring; follow the manual |
| Condition | No cracks, joints or damaged areas under the column base |
| Level | Floor slope affects column alignment; shims may be allowed within limits |
If the existing slab does not meet the requirement, a common solution is to cut out the area under each column and pour new footings to the specification.
4. Electrical supply
Most two-post lifts use a hydraulic power unit with an electric motor. Many 10,000 lb lifts use 208–230V single-phase power, while larger lifts may need three-phase. Confirm the voltage, phase, amperage and recommended circuit protection, and have a qualified electrician install the circuit according to local electrical code.
5. Anchors and installation
- Use the anchor type, size and embedment depth specified by the manufacturer.
- Torque anchors to the specified value and recheck after the first period of use.
- Bleed the hydraulic system and adjust equalizer cables as instructed.
- Test lift with a vehicle and confirm both locks engage evenly before regular use.
Many owners use a professional lift installer. Ask whether they will install to the manufacturer’s instructions and provide an inspection checklist.
Delivery planning
Two-post lifts ship as heavy freight, often with columns over 11 ft long. Plan for a forklift or enough people and equipment to unload safely, and check access to the bay. See preparing for heavy equipment delivery. Browse our two-post lift range and review each model’s specifications before ordering.
Frequently asked questions
Can I install a two-post lift on asphalt or pavers?
No. Two-post lifts require solid concrete that meets the manufacturer’s specification.
What if my ceiling is too low for a clear-floor lift?
Consider a floor-plate two-post lift, a mid-rise scissor lift, or a lift with a lower overall height.
Do I need a permit?
Some areas require permits or inspections for lifts and electrical work. Check with your local authority.
Send us your bay measurements, ceiling height and power supply, and we will help you check which lifts fit.