Truck courts and loading aprons in Gwinnett County carry loads a car lot never sees
Along the I-85 corridor through Gwinnett County, a large share of commercial pavement exists to move trailers rather than park cars. Distribution buildings, flex-industrial parks and service yards in Norcross, Peachtree Corners, Duluth, Lawrenceville and Buford all share a basic problem: one site holds two very different kinds of traffic, and the pavement has to be designed and maintained for each of them separately.
Two pavements on one industrial site
A typical flex or warehouse property has an employee and visitor lot near the office end of the building and a truck court along the dock side. The employee lot takes passenger vehicles, spread out and relatively light. The truck court takes loaded tractor-trailers that follow the same lines, stop in the same places and turn on the same arcs every day.
Those two areas need different pavement sections. A standard-duty section is thinner and suits the car lot well. A heavy-duty section has more asphalt, a thicker aggregate base and sometimes a stronger subgrade preparation, because each truck axle applies a load that is many times more damaging than a car axle.
Trouble begins when the boundary between the two sections does not match how trucks actually move. Drivers cut corners, use the car lot as a turnaround, or stage trailers in areas that were built for pickups. The pavement in those spots was never meant for that load and fails quickly.
The truck court and the loading apron
The truck court is the open area where trailers maneuver and back up to the dock doors. The apron is the strip directly in front of the doors where a trailer sits during loading. Both take heavy, repeated, slow-moving loads, and slow loads are the hardest on asphalt because the material has more time to deform under each wheel.
Look at the apron for ruts that line up with trailer wheel positions, for asphalt pushed up into a ridge in front of the dock bumpers, and for water standing in those ruts after rain. Standing water in a rut soaks the base beneath it and speeds the whole process up, so ruts on an apron rarely stay shallow for long.
Also look where the apron meets the building. Many docks have a depressed approach that slopes down toward the doors, with a trench drain or inlet at the bottom. If that drain is clogged, the lowest and most heavily loaded pavement on the site sits in water.
Landing gear dents in hot weather
When a driver drops a trailer and pulls the tractor away, the front of the trailer rests on two small landing gear feet. The whole front load of the trailer, sometimes a full one, bears down on those small pads for hours or days.
On a hot Georgia afternoon, the asphalt surface softens, and those feet sink in. The result is a pair of round or square dents set at a consistent spacing, usually in rows where trailers are dropped. Over time the dents deepen, collect water and crack at the edges.
There are practical responses. Some owners provide steel or concrete pads at the drop positions, some specify a stiffer surface mix in the trailer parking rows, and some rebuild the entire drop-lot area in concrete. The right choice depends on how many trailers stay on site and for how long, which the property manager usually knows better than anyone.
Scuffing where trailers turn tight
A tractor-trailer making a tight turn drags the tires of the trailer axles sideways across the surface rather than rolling them. In summer that scrubbing action tears at the softened asphalt, leaving curved scuff marks, loose aggregate and eventually a raveled patch at every sharp turn in the truck route.
The usual locations are the entrance throat, the corners of the truck court and anywhere trucks must swing around a building corner or island. Curbs and islands at those corners often show tire scars and broken concrete as well.
Sometimes the lasting fix is geometric rather than structural: widening a turn, moving an island or restriping the approach so trucks have room to swing wider. Paving the same tight turn with the same material tends to give the same scuffing a year or two later.
When concrete makes more sense at specific spots
Asphalt remains the practical choice for most of an industrial site. It is faster to place, easier to repair and suits large areas well. But a few specific locations tend to favor concrete, because concrete does not soften in the heat and holds its shape under standing loads.
- Loading aprons directly in front of the dock doors, where trailers sit during loading.
- Trailer drop rows where landing gear rests for long periods.
- Dumpster and compactor pads, where heavy containers sit and collection trucks lift.
- Tight turning areas where trailer tires scrub the surface every day.
- Low spots at depressed docks where water collects and asphalt stays wet.
How to read a proposal for an industrial property
A good proposal for a Gwinnett County warehouse or flex park separates the site into zones rather than giving one price per square yard for everything. It should name the car lot, the truck route, the court, the aprons and any trailer parking, and describe a different treatment for each where the loads justify it.
Ask how the heavy-duty areas were measured and whether the contractor walked the site while trucks were operating. Ask where full-depth repair is proposed and why, and whether the base will be inspected once the surface is removed. On a site where the trucks have been cutting across the car lot, ask whether the heavy-duty section will be extended to match the real truck path.
Finally, ask about phasing. Industrial tenants cannot stop shipping, so the work usually has to be done in sections, often at night or on weekends, with dock doors taken out of service in a planned sequence.
Keeping a truck court working between projects
Most of the damage on industrial pavement begins small: a crack at the edge of a rut, a single dent from a landing gear foot, a clogged trench drain. Catching those early keeps a small repair from becoming a large reconstruction.
A practical routine includes walking the truck court after heavy rain to find standing water, cleaning dock drains regularly, sealing cracks in the heavy-duty areas before water reaches the base, and asking tenants where trailers are actually dropped. The answer to that last question often explains most of the damage on the site.
What managers here ask most
What is the difference between heavy-duty and standard-duty asphalt?
The difference is mostly in thickness and base. A heavy-duty section has more asphalt and a thicker compacted aggregate base, so it can spread truck loads over a wider area of subgrade. Standard-duty sections are thinner and suit passenger vehicle parking. Many industrial sites use both, and problems appear where trucks travel over standard-duty pavement that was never meant to carry them.
Why are there round dents in our trailer parking area?
Those are almost always landing gear dents. When a trailer is dropped, its front rests on two small feet that concentrate a heavy load into a small area. In hot weather, the asphalt softens and the feet sink in. Over time the dents deepen and crack. Steel or concrete pads, a stiffer surface mix or a concrete drop area are common ways to deal with them.
Should our loading dock apron be concrete?
In many cases, yes. The apron takes slow, heavy, repeated loads and trailers sit on it during loading, which is where asphalt tends to rut and shove in summer heat. Concrete holds its shape under those conditions. It takes longer to place and cure, so the dock must be out of service longer, but it removes a recurring repair from one of the busiest areas.
Why does the asphalt break up at the corners of the truck court?
Trailers turning tightly drag their tires sideways across the surface instead of rolling. In warm weather that scrubbing tears aggregate loose and leaves scuffs and raveled patches. Repaving the same corner with the same geometry usually repeats the damage. Widening the turn, relocating an island or changing the traffic route can reduce the scrubbing, sometimes combined with a tougher surface mix or concrete.
Can paving work be done without shutting down our docks?
Usually, with planning. Work is commonly split into phases so some dock doors stay open while others are closed, and it is often scheduled at night or on weekends. Concrete sections need cure time before trucks return, so they require longer closures. A good proposal includes a phasing plan that the property manager and tenants review before work starts.
What should we check on a truck court between projects?
Walk it after a heavy rain and note standing water, especially in ruts and at depressed docks. Check trench drains and inlets for debris. Look for new cracks at rut edges and around landing gear dents, and seal them before water reaches the base. Ask tenants where they actually drop trailers and turn trucks, because that often differs from the original site plan.
Talk through your site
Start with the address, roughly how many square feet, and photographs of the worst areas and anywhere water sits after a storm.
The work, by type
Parking Lot Paving
New lots and full reconstruction, starting with the clay underneath.
Parking Lot Repair
Sorting an occupied lot into what has to happen now and what can wait.
Asphalt & Pothole Repair
Reading ruts, potholes and cracking back to the cause before choosing a fix.
Sealcoating & Crack Sealing
Protecting binder from Georgia sun, and the limits of what a coat can do.
Milling & Resurfacing
Mill and overlay versus stacking another layer on top of the curbs.
Parking Lot Striping
Re-planning layout and flow instead of repainting old lines.