Before we ever bolt a lift to your slab, we run a lift install site survey to make sure the job goes smoothly and the equipment stays safe for years. We’ve walked into shops across Iowa where a lift got ordered before anyone checked ceiling height, slab thickness, or door clearance, and it turned into an expensive lesson. A proper lift install site survey catches those problems on paper instead of on installation day, when a change order costs everyone time and money. Whether you’re putting a two post lift in a one-bay home garage or adding a fourth bay of scissor lifts at a dealership, the survey is the same basic process, just scaled to the space.
Not sure what lift fits your space? We’ll walk through your bay dimensions, ceiling height, and slab before you order anything.
Why a Lift Install Site Survey Comes First
A lift install site survey exists because a lift is only as good as the concrete and space around it. We’ve seen shops order a lift based on a catalog photo, only to find out the overhead door header sits too low for the arms to swing clear, or the slab was poured for foot traffic, not four tons of steel and vehicle weight concentrated on four small footprints. Skipping the survey doesn’t save time, it just moves the discovery of a problem from the planning stage to the installation stage, where fixing it is far more disruptive.
We treat the survey as a conversation, not just a checklist. We want to know what vehicles you’re lifting, how often, and whether that’s likely to change in the next five years. A shop that lifts sedans today but wants to service pickups and vans next year needs a different rated capacity and possibly a different lift style. The site survey lets us match the equipment to the real workload instead of guessing, and it gives you a written record of what we found before the first bolt goes into the floor.
Slab Thickness and Concrete Condition
The first thing we check in any lift install site survey is the concrete itself. Most two post and four post lifts need a minimum slab thickness, often four inches of properly cured concrete without excessive cracking, and that number goes up for heavier capacity lifts. We’re not just measuring thickness on paper, we’re looking at the actual condition on site, because old slabs can have rebar in the wrong place, expansion joints running through the anchor pattern, or curing issues that weaken the surface exactly where anchors need to hold.
We also check for existing cracks, previous patches, and any signs the slab has settled unevenly. A crack running near an anchor bolt location doesn’t automatically disqualify the site, but it changes where we can safely place the lift or whether reinforcement is needed first. In older Iowa shops, especially converted barns or buildings from the 1960s and 70s, we sometimes find slabs poured over fill dirt that has shifted over decades. Catching that during the lift install site survey means we can recommend a slab replacement or a different lift footprint before you’ve spent money on equipment that can’t be anchored safely where you wanted it.
Ceiling Height and Overhead Clearance
Overhead clearance is the most common reason a lift install site survey changes someone’s plans. We measure from the floor to the lowest overhead obstruction, not just the ceiling itself, which means lights, sprinkler heads, HVAC ductwork, and support beams all factor into the number. A two post lift needs enough clearance for the vehicle plus the lift’s own overhead height when raised to full travel, and that number surprises a lot of shop owners who assumed their ceiling was tall enough.
We also check door header height and width, because getting a lift and a vehicle into the bay matters as much as raising it once it’s inside. A four post lift with a low approach ramp or a scissor lift with a lower profile can sometimes solve a clearance problem that would rule out a two post lift entirely. This is exactly the kind of trade-off a good site survey surfaces early. We’d rather tell you during the survey that your building calls for a different lift style than sell you the wrong equipment and deal with a return or a modification later.
Electrical Service and Power Requirements
Most lifts need dedicated electrical service, and we check the existing panel capacity, wire gauge, and outlet location as part of every lift install site survey. Undersized wiring is a common issue in older buildings, and running new circuits after the lift arrives adds cost and downtime you could have avoided. We look at voltage requirements for the specific lift model, whether it needs single phase or three phase power, and how far the power run needs to travel from the panel to the installation point.
We also flag anything that needs an electrician before install day, since we’re not licensed electricians ourselves and coordinating that work ahead of time keeps the schedule on track. For shops adding multiple lifts, we check whether the existing service can handle simultaneous operation or whether a panel upgrade makes sense now rather than after the third lift is installed. This is one of the areas where a thorough site survey pays for itself many times over.
Bay Spacing and Traffic Flow
A lift install site survey also looks beyond the footprint of the lift itself to how vehicles and people move around it once it’s installed. We measure column spacing needs for two post lifts, the swing radius of the arms with a vehicle in place, and the clearance needed to open doors fully for technicians working underneath. Getting this wrong means a lift that technically fits but makes every job harder than it needs to be.
We also think about how multiple lifts interact in a multi-bay shop. Two post lifts with columns too close together create pinch points and make it hard to walk between bays with a vehicle raised. We’ve adjusted lift placement plans during a site survey more than once simply because the original spacing would have made day-to-day work miserable, even though the lifts themselves would have fit and functioned.
Drainage, Lighting, and Environmental Factors
Environmental details round out every lift install site survey, and they’re easy to overlook until they cause a problem. We check floor drains near the intended lift location, since standing water or oil near hydraulic components isn’t ideal and can affect anchor performance over time. We also look at ambient lighting in the bay, because poor lighting around a lift creates a safety issue for technicians working under a raised vehicle, regardless of how well the lift itself is installed.
For shops in unheated or partially heated buildings, we check for temperature extremes that can affect hydraulic fluid performance and rubber seals over an Iowa winter. Outdoor or semi-outdoor installations get extra scrutiny for weather exposure and require different equipment specifications altogether. None of these factors are usually deal breakers on their own, but a thorough lift install site survey catalogs all of them so nothing surprises you after the equipment is bolted down.
What Happens After the Survey
Once the lift install site survey is complete, we put our findings in writing and walk through them with you before recommending specific equipment. This is where we discuss lift style options, capacity ratings, and any prep work needed on the building side, whether that’s a slab section, an electrical run, or adjusting bay layout. You’ll see exactly why we’re recommending what we’re recommending, tied back to what we measured on site.
We’ve documented this process in detail for different parts of Iowa, including our notes on auto lift install prep and site survey basics, our walkthrough of a two post lift install in the Des Moines area, and a look at a southeast Iowa install where site conditions shaped the final equipment choice. Every one of these jobs started with the same kind of survey, because skipping it just moves the risk to a more expensive point in the project.
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