Dump truck tarp systems: manual vs electric, cover laws and what they cost
Steve Woods · Truck Dispatcher, TruckSprint
Steve Woods is a truck dispatcher with 9 years of experience in trucking. He reviews every guide we publish. How we research and update guides.
Updated October 2026
Quick answer
A dump truck tarp system rolls a cover over the body so loose loads can't blow or spill, which federal and state rules require. Manual crank systems are cheapest: one retailer listed an 8x22 ft kit with tarp at $286.07 in October 2026. Electric 12V arm systems cover from the cab and listed at $1,201 to $1,334, tarp extra.
Source: 49 CFR 393.100; Mill Supply listings, Oct 27, 2026 · checked 2026-10
A dump truck tarp system is the cheapest equipment on the truck that can cost you the most. A missing tarp brings a ticket, a cracked windshield behind you brings a claim, and a load that blows out shrinks the tons you get paid for. I'm Steve Woods, a truck dispatcher at TruckSprint with 9 years in trucking. Here's how the systems differ, what they cost and what the law asks.
The four kinds of tarp systems
| System | How it works | Best for |
|---|---|---|
| Manual crank, front to back | A roller at the front of the body; you crank it back over the load and tie off the end | Low tarp counts, tight budgets, small trucks |
| Electric arm, side to side | Spring or motor driven arms swing the tarp across the body from a cab switch | Many loads a day, tri-axles and larger |
| Electric front to back | A powered roller pulls the tarp rearward on rails or cables | Long bodies, trailers |
| Roll-off gantry or cable | A frame on the truck rolls the tarp over whatever container is loaded | Roll-off trucks, changing containers |
Side-to-side arm systems are the common electric setup on straight dump trucks because the arms clear the cab and the tarp seals against both sides. Front-to-back systems suit long trailers where side arms would need to span too far.
Manual tarp system for dump trucks
A manual system is a roller, a tarp, a crank and mounting hardware. You crank it out over the load from the ground, or a pull rope draws it back. It's simple, light and cheap to fix.
The cost shows up in time and risk. Tarping by hand 15 times a day adds minutes to every cycle, and any system that has you climbing on the body puts you up high near a loaded box. Keep your feet on the ground or the catwalk the system was built for.
Electric tarp system for dump trucks
An electric arm system adds a 12V motor, wiring to the battery, a cab switch and spring-loaded arms. You cover and uncover without leaving the seat. On a short-haul aggregate loop with many loads a day, that's the main argument for one.
It also adds parts that fail: motors, switches, rubbed-through wiring and broken springs. Carry the manual backup crank if your system has one, so a dead motor doesn't stop the day.
What they cost
These are one retailer's listed prices for kits from one maker, so treat them as a reference point, not a market average. Installation isn't included.
| Kit (Buyers Products, listed by Mill Supply) | Listed price | Tarp included |
|---|---|---|
| Manual crank system with mesh tarp, 8 x 22 ft | $286.07 | Yes |
| 12V side-mount arm system, 8 to 19 ft bodies | $1201.21 | No |
| 12V side-mount arm system, 14 to 23 ft bodies | $1334.37 | No |
Source: Mill Supply product listings (Buyers Products tarp systems), read Oct 27, 2026 · checked 2026-10
Add the tarp, the install labor and the downtime when you compare. Get an installed quote from a body shop or dealer for your exact body.
Dump truck tarp system parts
Whatever the brand, the same parts wear out:
- Tarp: mesh or solid fabric, sized to the body's width and length.
- Roller or axle: the tube the tarp winds onto; check it runs straight.
- Arms and pivots: aluminum or steel arms with springs at the pivots.
- Motor and gearbox: 12V on most electric kits.
- Switch and wiring: cab rocker switch, breaker and the wire run to the battery.
- Wind deflector and bumpers: keep the tarp from catching air and the arms from hitting the body.
- Crank, ropes and tie-downs: on manual systems, and as the backup on many electric ones.
The 12V kits above list a wiring kit, bumpers and a wind deflector in the box.
Dump truck cover laws
The federal rule in 49 CFR 393.100 applies to every commercial load: it must be contained, immobilized or secured so it can't leak, spill, blow or fall from the vehicle.
Source: 49 CFR 393.100 (eCFR) · checked 2026-10
States add specific cover laws for loose material. Here are four, read on each state's official code site in October 2026:
| State | Law | What it requires |
|---|---|---|
| California | Vehicle Code 23114 | Aggregate must be covered unless it stays 6 in below the top edge where it touches the sides, front and back, and the peak stays below the edge; sealed gates, splash flaps, fenders and shed boards also required. |
| Florida | Statutes 316.520(2) | Dirt, sand, gravel, trash and similar loads must be covered and secured with a close-fitting tarp or other cover, or a federal-standard securing device; local harvest and farm-road exemptions. |
| New York | Vehicle and Traffic Law 380-a | Open trucks and trailers carrying loose substances need a cover that completely closes the opening, unless the load is arranged so nothing can fall or blow out; farm products exempt. |
| Virginia | Code 46.2-1156(B) | Trucks and trailers carrying gravel, sand, coal or other nonagricultural, nonforestry products must secure or cover the load on state and local roads; pickups and some utility and snow-removal vehicles excluded. |
This is a sample, not a full list. Every state has its own wording, exemptions and fines, and counties and cities can add local rules. Look up the vehicle code for each state you run in. When the rule is unclear, tarp.
Picking a system for your work
- Aggregate and rock: mesh tarp, electric side-to-side arms if you run many short loads. More on loading and covering in hauling aggregate.
- Sand, dirt and fines: a solid tarp that seals at the sides.
- Hot mix: follow the paving spec for covers; see asphalt hauling.
- Demolition debris and roll-offs: a gantry or arm system sized to the container; see demolition and debris hauling.
Match the system to the body too. A tri-axle or quad with a long body (see types of dump trucks) needs arms rated for its length.
Daily tarp checklist
- Tarp has no holes, tears or frayed edges.
- Roller turns freely and winds straight.
- Arms, springs and pivots are tight and not cracked.
- Motor runs both ways; switch and breaker work.
- Wiring isn't rubbed through where it crosses the frame.
- Backup crank and tie-downs are on the truck.
TruckSprint no longer dispatches dump trucks. If you also run a 26 ft box truck, our desk can keep it loaded.
Sources
- 49 CFR 393.100 (eCFR)
- California Vehicle Code 23114; Florida Statutes 316.520; New York Vehicle and Traffic Law 380-a; Code of Virginia 46.2-1156, read October 2026
- Mill Supply listings for Buyers Products tarp systems, read October 27, 2026