Practical

How to Stop a Dumpster Wrecking Your Driveway

A loaded roll-off puts several tons on four small steel contact points. Around here the problem is rarely the concrete — it is the sand underneath it.

Why this matters here

South-west Florida driveways fail differently from northern ones. There is no frost, so you do not get the heave-and-settle cycle. What you get instead is sand.

The soil here is sandy and it moves — it washes, it settles, and in the wet season it saturates. A driveway slab or a paver field is only as stable as the base beneath it, and around here that base is usually compacted sand rather than rock.

The result is that a driveway which looks perfect can have soft or voided support underneath, and a concentrated point load will find it.

How the damage actually happens

People picture the container's weight spread across its footprint. It is not. A roll-off sits on two steel rails and concentrates load at a small number of contact points — typically the rear wheels and the front of the rails.

A 20 yard loaded to four tons, plus the container's own weight, puts something in the order of several thousand pounds onto each of those points. Three mechanisms follow:

• Static load. The container sitting there over days, gradually pressing in.
• Dynamic load during delivery. The moment the container rolls off and the rear wheels touch down is the highest instantaneous load of the whole rental.
• Dragging. Winching the container back on drags the rails across the surface.

What protection boards do

Plywood under the rails spreads a point load across a much larger area. It is unglamorous and extremely effective — the difference between several thousand pounds on four small contacts and the same weight distributed across several square feet.

Our drivers carry plywood on every truck as standard equipment. Boards go down before the container touches the surface, not afterwards, and again on collection because the drag-on is as damaging as the drop-off.

Pavers are the local issue

Paver driveways are everywhere here — the Isles, Rotonda, Babcock Ranch, most of the newer building — and they need a different level of care.

The pavers themselves are strong. The problem is what holds them: a bed of sand and a sand-filled joint. Concentrate several thousand pounds on one spot and the pavers do not crack, they sink — and once the bedding has displaced, they stay sunk.

Dragging is the other risk. Winching a container across a paver field can lift and rotate individual units.

So on pavers we double the boards as standard and lift rather than drag on collection wherever the site allows. If your driveway is pavers, say so at booking — it changes how we set up, not whether we come.

Sandy soil and the wet season

From roughly June to October the ground here takes a lot of water, and saturated sand loses bearing capacity fast.

Two consequences. A lawn or unpaved placement that is perfectly fine in March can rut badly in August, and in bad cases the truck itself gets stuck — which does far more damage than the container ever would. And a driveway edge with washed-out base beside it can break away under load.

If it has been raining hard, tell us. We would rather move the placement or the date than put a loaded truck somewhere it should not go.

Surface by surface

Concrete driveway

Generally fine with boards down. Florida driveway slabs are often thinner than northern ones, so watch for existing cracking and any section that sounds hollow underfoot.

Pavers

Doubled boards, and lift rather than drag. See above.

Shell and crushed stone

Common on older and rural lots. Forgiving in dry conditions, some displacement that rakes back. Poor in the wet season, because there is nothing spreading the load once the base softens.

Grass and bare ground

Workable when dry and firm. Not in the wet season.

Pool decks

Never. It gets asked, and the answer is always no — pool deck slabs are thin and often over a cage footer or plumbing.

What is underneath

Irrigation. Near-universal on Florida lawns and shallow-buried. A lawn placement over a sprinkler line will crush it.

Septic systems. Common on rural and older lots in the east county. Never place over a tank or drain field.

Pool plumbing and cage footers. Around the lanai, assume something is under there.

If something does go wrong

It is uncommon, but it happens. Tell us straight away rather than after the container is gone. Photograph it. We are licensed and insured, and where damage results from our placement we deal with it rather than arguing about it.

What we cannot take responsibility for is damage from a hazard nobody told us about — an irrigation line we did not know was there, or a driveway already failing that we were not shown.

The short version

• Boards go under the rails on every delivery. If a hauler does not do this as standard, use a different hauler.
• Say if your driveway is pavers. We double up and change how we collect.
• Tell us about existing cracks or anything that sounds hollow.
• Tell us if it has been raining hard, and be flexible about placement.
• Say where the irrigation runs.
• Photograph existing damage before delivery.