Flatwork built for loaded trucks

What a commercial slab has to carry

Weight is the whole difference. A loaded trailer puts more on a dock apron in one trip than a pickup puts on a driveway in a year, and it lands on the same strip of concrete every day. Same swing. Same spot where the trailer legs drop. So we walk the traffic first. Where do the trucks come in, where do they turn, where does the weight sit while it's parked. Those spots get built for it, and the rest gets built for what it actually sees.

Then we look under it. Most commercial lots around Tampa sit on sand with fill dragged in on top. Fill nobody compacted right is why so many yard slabs are already broken up when we show up. We proof roll the subgrade, dig out the soft spots, put back something that packs, and run the plate until it quits sinking. Concrete won't bridge a void. It sits on whatever you hand it.

Thickness and rebar come off that same walk. A walkway that only takes people isn't poured like an apron that takes a loaded trailer, even when the two meet at the same joint. You'll hear which is which. You'll hear where the joints go and why they go there. All of that happens before a form board comes off the truck.

• We walk your truck traffic before quoting
• Subgrade proof rolled, soft spots dug out
• Thickness and steel sized to real loads
• Joints laid out, cut on time
• Lot swept clean before we go

Drainage on a flat lot

Hillsborough County is flat. A commercial lot is flatter. Whatever fall you get is the fall somebody built, and if nobody built it, the water just sits. Tampa takes a hard rain most summer afternoons and a lot that ponds will hold it for hours. That water isn't only annoying to walk through. It works down every joint, softens the base, and starts the slow settle that turns a good apron into a dish with a lip around it.

So we shoot grades before the forms go in and build the fall into the slab. Water runs to the drain or the swale, away from your building, never toward the door. Where a new pour meets an old slab or a threshold, we step it down so the rain leaves instead of pooling on the block. Enrique wrote: "Jose responded all my questions and took the time to find a solution to resolve some terrain problems, then water can flow without any problems."

Skip it and you can read the result off any tired lot in the area. Dark stain where the water sits. A crack that follows the low line. A joint that's opened up and pumps gray slurry out every time a truck rolls over it. Once it's pumping, the slab is losing its base a spoonful at a time, and patching the top doesn't put any of that back.

Joints, cracks and where they go

Concrete cracks. That's not a defect, that's curing, and the whole job of a joint is to pick where it happens so the crack lands in a straight saw line instead of wandering across your apron. On a commercial pour that means planning the pattern with the slab. Keep the panels close to square. Line the cuts up with columns, doors and the corners where a crack wants to start on its own.

Timing counts as much as layout. Cut too early and the saw tears the edge and ravels the surface. Wait too long on a hot afternoon, when the slab is going off fast, and the concrete already picked its own crack. Your cut is just decoration at that point. We watch the slab and cut when it's ready, which sometimes means we're back on your lot in the evening finishing what we started at six that morning.

Surface is the last call. A warehouse apron gets a broom finish for grip, because slick troweled concrete plus a Florida downpour is how people go down and how a forklift loses its feet. Along the edges and the door line we tighten it and tool the edge. That's the first thing a wheel clips, and a square soft edge chips off the day it gets hit.

Working around a business that stays open

Most warehouses can't close for concrete. That shapes everything. Before we break anything out, we figure which doors have to stay usable and where your trucks go while their normal approach is roped off. Then we pour in sections so there's always a way in. Sometimes that stretches the job a few days. Cheaper than losing your dock, every time.

When there's a failed slab in the way, demo comes first and we do it ourselves. Broken concrete out, base checked and fixed, forms set, pour. You're not hiring somebody else to clear a path for us. We start at six in the morning, Monday through Saturday, so on a lot of these jobs the loud part is finished before your day gets rolling.

Then there's cure time, and that's the piece people try to talk us out of. Fresh concrete needs time before it takes weight. Run a loaded truck across it early and you own a rutted, cracked apron with nobody to blame but the calendar. You get the day it opens to foot traffic and the day it opens to trucks. We barricade it. That conversation goes better before the pour than after.