A third-generation family-owned garage in Waukee asked us for a technical deep-dive on automotive two post lifts before they replaced the two mid-nineties units they had been babying along for twenty-eight years. Their daily bread is CV axle and half-shaft replacement work — a job that lives or dies on how quickly you can position a vehicle, drop the arms, spin a wrench, and rotate the next car in. We walked through freight, unloading, forklift logistics, and the exact dimensions that would matter for their bay geometry. What follows is the same technical breakdown we gave them, with the real measurements shop owners actually need before they order.
Full spec sheets, install-manual dimensions, and honest freight numbers on every automotive two post lifts model we carry.
Bay Geometry and Column Spread Dimensions
The first dimension every shop owner needs to lock down before ordering automotive two post lifts is the column spread — the outside-to-outside width between the two columns. On a standard ten-thousand-pound symmetric lift, that number is typically around a hundred and thirty-two inches, though it varies by manufacturer. His existing bays were framed at twelve feet wide door-to-door, which gave him enough working room on either side of the columns for tools, an air hose reel, and the small drop light stand that lives in the corner of every real working shop.
Column spread also has an inside dimension — the drive-through width between the columns — that matters more for CV axle work than most shop owners realize. His half-shaft jobs frequently involved wide track pickups where the tires needed to swing outboard of the columns during removal, so the drive-through number was worth measuring on both candidate models. One model gave him about ninety-six inches inside; the other gave him about a hundred and one. The five-inch difference sounded trivial and turned out to be a genuine operational factor on his widest daily vehicles.
Weight on the Freight Truck
The freight weight of a modern pair of automotive two post lifts is a number most first-time buyers underestimate. A single ten-thousand-pound clear-floor unit, fully crated with columns, crossbeam, four arms, hydraulic power unit, and hardware kit, runs about eighteen hundred to two thousand pounds. A pair therefore lands on the freight truck at three thousand six hundred pounds and up. That is not a lift-gate-and-pallet-jack unload. That is a five-ton forklift job, minimum. If you do not have a real forklift or a friend who does, plan for that logistically before delivery day rather than during it.
His shop had an older forklift from his father’s era that he was not sure was rated for the load. We had him check the ID plate — three thousand pounds capacity, which was enough for a single crate but not both simultaneously. We adjusted his delivery plan to unload one crate at a time, with the freight driver’s cooperation, rather than trying to double-stack. That five-minute conversation before delivery saved him a very bad thirty minutes on the day the truck actually arrived. Small logistical detail, real risk to the freight and to his forklift operator’s back if it had gone wrong.
Unloading With a Five-Ton Forklift Safely
Unloading crated automotive two post lifts is one of the most under-discussed hazards in the whole install process. The crates are top-heavy, the load is unforgiving if it shifts, and freight drivers are on the clock and not always inclined to wait while you figure out fork placement. We gave him a written unload plan the day before delivery — fork spread, approach angle, tilt-back setting, and the ground-slope check for his lot. His delivery pad had a slight grade that we had noted on the site visit, and that grade matters more with a top-heavy crate than shop owners expect.
Two people minimum on the unload — one on the forklift and one directing, both with hard hats. Freight driver stays clear of the swing zone until the crate is on the ground. Do not accept freight into your possession until you have visually inspected both crates for damage while the driver is still on-site. If a corner is punched in and you sign without noting it, the freight claim gets much harder. We have written the full unload procedure up in our lift delivery unload checklist for shops that want the step-by-step.
Concrete Thickness and Rebar Considerations
His garage floor was poured in 1997 as part of the original shop build. That put it at twenty-nine years old going into the new install. Iowa concrete of that vintage in a commercial shop context is typically four to five inches thick with rebar at eighteen-inch centers. We core-sampled at each anchor location before delivery — a two-hour job with a small coring rig — and confirmed four and three-quarter inches with rebar exactly where the manufacturer’s install manual required it to be clear. Both of his automotive two post lifts could be anchored to spec.
If the core sample had come back at three and a half inches, or if rebar had been in an anchor location, the install would have been different. Options at that point include drilling epoxy-set anchors, pouring a supplemental concrete pad beneath the columns, or in a worst case, replacing the slab section. We would rather find out on the pre-install core sample than during the anchor drilling on install day, which is why we do the core sample as a routine step on any install where the slab age or spec is uncertain. Better an honest morning of coring than a bad afternoon of drilling.
Arm Reach and Pickup Point Numbers
For CV axle and half-shaft work, arm reach is the dimension that matters most in daily operation. His candidate automotive two post lifts had different published arm reach numbers — one model gave him a full retraction of about twenty-four inches and a full extension of about sixty inches, while the other gave him twenty-two inches retracted and sixty-four extended. That extra four inches at full extension meant he could set arms on a long-wheelbase pickup without repositioning it after the initial drive-in, which was worth actual daily minutes saved.
Pickup point locations for CV axle work put the arms under the frame rail forward of the front wheel and rearward of the front wheel, respectively. On modern unibody vehicles the pickup points are engineered specifically for lift arm interaction, but on older pickups the frame is more open to interpretation. We recommended a set of taller stack pads on top of the standard adapter pads to give him more clearance under the vehicle for the CV shaft to swing free during removal. Small dollar addition, real operational win on the actual daily work — an accessory selection topic we cover in our two-post lift accessories guide.
Ceiling Clearance for a Half-Shaft Extraction
Half-shaft extractions on modern vehicles are usually not a full-height job — most shafts pull free with the vehicle at about waist height. But full stroke on automotive two post lifts is where you need for the occasional under-vehicle inspection, brake line work, or fuel tank drop. His overhead configuration lift required about a hundred and forty-four inches of ceiling clearance to reach full stroke on the tallest vehicle in his lane, which was a modest full-size SUV. His ceiling measured a hundred and forty-eight, giving him four inches of margin. Adequate but tight, and worth measuring in advance.
If his ceiling had come in under the required clearance, we would have offered him a baseplate configuration for one bay and left the overhead on the other. That is what we did for a shop in a neighboring town whose ceiling was borderline in exactly the same way. On his install, the overhead was fine, and it kept his floor completely clear for the wheel dolly he uses several times a day. The four-inch margin is not enough to be complacent about, but it is enough to make the operational choice we all preferred. Small measurement, real design decision downstream.
The Final Dimensional Sanity Check
Before he signed the order, we ran a final dimensional sanity check on paper. Column spread against bay width — clear. Drive-through inside dimension against widest customer vehicle track — clear with margin. Freight crate weight against forklift capacity — matched with the one-at-a-time unload plan. Concrete thickness and rebar location — verified by core sample. Arm reach against typical vehicle wheelbase — clear at full extension. Ceiling clearance against full-stroke height — clear with four inches of margin. Every dimension on the sanity check came back positive before he committed a nickel.
That is the checklist we run before every commercial install of automotive two post lifts, and it is why our install day surprises are counted in single digits per year across dozens of installs. Every dimensional problem we prevent on the drawing table is a problem we do not have to fix in the parking lot with a diamond bit and a lot of dust. If you are staring at an install of your own and unsure whether every dimension has been verified, we would rather run the sanity check with you honestly before you order than fix a mismatch on the day of. Call us at 800-674-9302 to walk it through.
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