How Much Concrete in a Truck Load?

Truck Capacities: Standard 10-Yard Mixers vs. Short-Load Trucks

In commercial construction, ready-mix concrete is sold and delivered by the cubic yard. The standard three-to-four-axle rear-discharge mixer truck—the familiar vehicle seen on residential foundation and driveway pours—features a rated mixing capacity of 9 to 10 cubic yards. Newer multi-axle front-discharge mixer trucks (popular in the Midwest and East Coast) carry an identical 10-to-11-cubic-yard payload, allowing the driver to chute concrete directly into footings from the cab.

For small residential homeowner jobs—such as pouring a single sidewalk slab, hot tub pad, or fence post footings—ordering a massive 10-yard truck is impractical and expensive due to 'short-load fees' charged by ready-mix plants for orders under 5 cubic yards. For these smaller projects, specialized 'short-load' or volumetric on-demand concrete trucks are used. These mobile batch plants carry dry sand, gravel, cement powder, and water in separate compartments, mixing anywhere from 1 to 6 cubic yards on-site on demand.

Compare concrete delivery truck types, yard capacities, weights, and typical use cases:

The Weight Math: Why Concrete Trucks 'Weigh Out' Rapidly

Homeowners are frequently surprised to learn why concrete mixer drums are only filled to roughly 70% of their physical volume. The constraint is extreme physical weight. Standard normal-weight concrete (composed of Portland cement, water, sand, and crushed stone aggregate) weighs approximately 4,050 pounds per cubic yard (roughly 150 pounds per cubic foot).

Multiplying 10 cubic yards by 4,050 pounds yields 40,500 pounds of wet concrete cargo alone. When added to the empty tare weight of a heavy commercial four-axle truck chassis and steel mixing barrel (approximately 26,000 to 30,000 pounds), the gross vehicle weight reaches 66,500 to 70,000 pounds (33 to 35 tons). Federal and state Department of Transportation (DOT) bridge laws strictly regulate gross vehicle weights and per-axle weight limits to prevent crushing asphalt roadways, mandating lift axles and restricting total load size.

Review the physical volume and coverage area provided by a full 10-yard concrete truck load:

Ordering Ready-Mix: Calculating Waste and Short-Load Fees

When ordering ready-mix concrete by the truckload, contractors universally apply the '10% waste buffer rule'. Excavated earth trenches, gravel sub-bases, and wooden formwork are never laser-flat; bowed 2x4 form boards, sub-base settling, and uneven ground dips easily consume an extra 5% to 10% of concrete volume. Running out of concrete with 10 feet of driveway remaining creates an emergency 'cold joint' that ruins structural integrity and looks terrible.

Furthermore, ready-mix dispatchers charge 'short-load fees' if you order less than a full truckload. A typical batch plant considers 6 or 7 cubic yards the minimum threshold for standard delivery; ordering only 2 or 3 yards on a 10-yard truck incurs an extra $100 to $250 short-load surcharge to cover driver wages and truck fuel. Dispatch also charges 'demurrage fees' (typically $1.50 to $2.50 per minute) if your crew takes longer than the standard 60-to-90-minute allowance to unload the truck.