How to Load a Dump Trailer Properly: Weight, Balance and Tarping

There is a right way to load a dump trailer and it is not obvious. Most people default to filling it like a laundry basket — walk up to the tail, throw the thing in, repeat. That produces a load that is dangerously tail-heavy, cannot be tarped, wastes a third of the capacity, and is a genuine hazard on the road.

Loading well is not hard, it just requires a plan before the first item goes in. Here is how we would load a 10-yard trailer, whether it is sitting in a driveway in Safety Harbor or on a jobsite in Tampa.

Rule one: heavy material low and over the axles

Weight distribution is the whole ballgame. Everything dense — concrete, brick, soil, rock, roofing, wet material — belongs on the floor of the trailer and centered over the axles, not up high and not at either end.

• Too much weight at the tail unloads the tongue, and a light tongue is what causes trailer sway. Sway at highway speed is how people lose a trailer, a truck, and considerably more.
• Too much weight at the front overloads the tongue and the tow vehicle's rear suspension, and it makes the truck steer badly.
• Weight up high raises the center of gravity and makes the whole rig twitchy in crosswinds — which, on a bridge over Tampa Bay, is not theoretical.
• The target is a load that is centered slightly forward of the axles, spread evenly side to side, and as low as the volume allows.

Build the load in layers. Dense material first, spread across the floor. Then medium material. Then the light bulky stuff on top. Never the reverse.

Rule two: know which material is going to get you

The most common way people blow a weight allowance is by misjudging density. Volume is what your eye reads. Weight is what the scale reads. They are not the same thing and they are not even close.

• Wet debris is dramatically heavier than the same debris dry. Water-soaked drywall, carpet, sod and soil are the classic ways people go over.
• Soil, sod, rock, brick, and concrete are extremely dense. A landscape strip-out can hit its weight limit with the trailer looking half empty. Heavy material like this is limited to roughly 5 yards per load.
• Roofing shingles are much heavier than they look. A tear-off adds up fast.
• Brush, fronds, furniture, cardboard, and household junk are the opposite — they will fill the box long before they trouble the scale.
• If rain is in the forecast and the trailer is loaded, tarp it. A load of open drywall and cardboard sitting through a Florida afternoon thunderstorm can gain a startling amount of weight overnight.

Your rental includes a set tonnage allowance, with any overage billed per ton. When weight matters, we provide a certified scale receipt so there is no mystery about what the load actually weighed.

Rule three: break it down so you are not hauling air

Every void in the load is capacity you are paying for and not using. Bulky items are the worst offenders.

• Take apart furniture, shelving units, bed frames, and cabinets rather than throwing them in intact. A dresser is 90 percent air.
• Flatten cardboard. Always.
• Cut long lumber, fencing, and branches down so they lie flat rather than propping the load up on a diagonal.
• Nest things. Buckets inside buckets, small items inside larger hollow ones.
• Climb in and compress periodically, especially with brush, insulation, and household junk. Compaction is free space.
• Fill voids as you go rather than at the end — throw small debris and clippings into the gaps around big items.

Rule four: level with the top rail, and tarp it

A load has to be level with the top rail. Not heaped, not mounded, not with a couch leg pointing at the sky. There are two reasons, and both are serious.

1. 1It has to be tarped. A load that is mounded over the rail cannot be covered, and an uncovered load sheds debris onto the road. That is a genuine hazard to whoever is behind us, and it is a citation.
2. 2An overheight load is unstable. Material above the rail has nothing containing it and it shifts every time the trailer moves.

So keep it level. If you have more material than the trailer holds, that is a second load, and that is fine — it is not a reason to build a pyramid.

Rule five: never load what cannot be hauled

Some things simply do not go in the trailer, regardless of how convenient it would be. These are the prohibited items:

• Hazardous waste — paint, solvents, pesticides, pool chemicals, motor oil, fuel.
• Asbestos-containing material. If you are demoing anything old and you have any doubt, stop and get it tested.
• Biomedical waste.
• Explosives and ammunition.
• Compressed gas cylinders, including propane tanks.
• Liquids and free-flowing liquid waste of any kind.

These are not arbitrary. A propane cylinder in a load headed for a transfer facility is a serious danger to people who did not sign up for it. When in doubt, ask us before it goes in.

A loading sequence that works

1. 1Sort your material into piles before you load anything: dense, medium, light bulky, and prohibited/hazardous.
2. 2Break down and cut everything down to size while it is still on the ground. Do not do this from inside the trailer.
3. 3Load dense material first — floor level, centered over the axles, spread evenly side to side.
4. 4Layer medium material on top, still working front to back rather than dumping everything at the tail.
5. 5Top with light bulky material, packing voids as you go and compressing periodically.
6. 6Level the load with the top rail, walk around it, and confirm nothing is sticking out or up.
7. 7Tarp it if it will sit through weather before pickup.

Need a 10-yard trailer in the driveway to put all this to use? Book your date at robertlesliehauling.com or call (727) 779-8919 — free local delivery and pickup across Pinellas, Hillsborough and Pasco, and if the loading is more than you want to take on, we offer a full-service option where our crew does it for you.