A dump trailer’s holding capacity varies greatly, typically ranging from 2 to 16 cubic yards. This variance depends on factors such as the trailer’s size, design (e.g., low-profile, high-side), and intended use, making careful consideration crucial for any hauling project.
Understanding Dump Trailer Capacity: A Comprehensive Guide
Choosing the right dump trailer means accurately assessing your hauling needs. A trailer that’s too small will require multiple trips, increasing time and fuel costs. Conversely, an oversized trailer could be difficult to maneuver and may not be fully utilized, leading to inefficiencies. This guide will help you navigate the complexities of dump trailer capacity.
Factors Affecting Dump Trailer Cubic Yardage
Several key factors determine how many cubic yards a dump trailer can hold. Understanding these factors is essential for making informed decisions when purchasing or renting.
- Trailer Size: Naturally, the overall dimensions of the trailer are the primary determinant. Longer, wider, and taller trailers offer more internal volume.
- Side Height: Higher side walls significantly increase the cubic yardage capacity. Consider the types of materials you’ll be hauling; taller sides are beneficial for light but bulky items like mulch.
- Trailer Design: Low-profile trailers, designed for easier loading, generally have a smaller capacity than high-side trailers. The slope of the trailer bed also affects the usable volume.
- Material Density: While a trailer might have a specific cubic yard rating, the weight of the material being hauled is crucial. Overloading beyond the trailer’s weight capacity is dangerous and illegal. Lighter materials, like wood chips, can fill the entire cubic yardage, while heavier materials, like gravel, can reach the weight limit before the volume is full.
- Trailer Shape: Some trailers have a tapered or rounded design, which reduces the usable volume compared to a trailer with straight, vertical sides.
Calculating Cubic Yardage: The Formula
While manufacturers often provide the cubic yardage, knowing how to calculate it yourself can be helpful. The formula depends on the shape of the trailer bed. For a rectangular bed, use:
Length (ft) x Width (ft) x Height (ft) / 27 = Cubic Yards
Remember, this provides an approximate figure. Account for any sloping sides or uneven areas that might reduce the actual capacity. To convert inches to feet, divide by 12.
Weight Capacity vs. Cubic Yardage
It is crucial to remember that cubic yardage and weight capacity are distinct but related measures. A trailer might be able to hold a certain number of cubic yards, but it may not be able to safely carry the weight of that volume, depending on the material’s density. Always prioritize adhering to the trailer’s Gross Vehicle Weight Rating (GVWR), which is the maximum permissible weight of the trailer and its load. Consult your trailer’s documentation or the manufacturer for this critical information.
Frequently Asked Questions (FAQs) About Dump Trailer Capacity
Here are some of the most common questions concerning dump trailer volumes.
FAQ 1: What’s the average cubic yard capacity of a 6×12 dump trailer?
A 6×12 dump trailer typically holds between 4 and 6 cubic yards. This range varies based on side height and trailer design.
FAQ 2: Can I overload my dump trailer if I don’t fill it to the brim?
Yes! Overloading depends on the weight of the material, not just the volume. Heavy materials like gravel or wet soil can easily exceed the trailer’s GVWR even if the trailer isn’t completely full.
FAQ 3: How can I accurately measure cubic yards when loading my trailer?
Use a measuring tape to determine the height of the material loaded. Then, calculate the volume using the formula mentioned earlier, accounting for the trailer’s dimensions. A rough estimate can be obtained by visually dividing the trailer bed into sections and estimating the volume of each section.
FAQ 4: What happens if I overload my dump trailer?
Overloading can damage the trailer’s axles, suspension, and tires, leading to potential accidents. It’s also illegal and can result in fines. More seriously, it affects braking distance and overall handling, increasing the risk of rollovers and collisions.
FAQ 5: Are there different standards for measuring cubic yards in dump trailers?
While there are no formal industry standards, manufacturers generally use the internal dimensions of the trailer bed to calculate cubic yardage. Always check the manufacturer’s specifications and consider that usable capacity may differ slightly.
FAQ 6: Does the type of material I’m hauling affect the ideal dump trailer size?
Absolutely. For light, bulky materials like mulch or leaves, a trailer with a higher cubic yard capacity is preferable. For heavy materials like gravel or concrete, a smaller trailer with a higher weight capacity might be more suitable.
FAQ 7: How does the angle of the dump affect the effective capacity?
The angle of the dump doesn’t directly affect the capacity of the trailer, but it does influence how effectively the load is discharged. A steeper dump angle is often needed for sticky or cohesive materials.
FAQ 8: What are “struck capacity” and “heaped capacity,” and how do they relate to dump trailers?
These terms are more commonly used for loader buckets, but the principle applies. Struck capacity refers to the volume of material when leveled to the top edge of the trailer sides. Heaped capacity refers to the volume when the material is piled above the sides. Always refer to the struck capacity for accurate volume estimates in dump trailers.
FAQ 9: How do I choose between a low-profile and a high-side dump trailer?
Low-profile trailers are easier to load manually due to their lower deck height. High-side trailers offer greater cubic yardage and are better suited for hauling larger volumes of lighter materials. Consider your loading method and the types of materials you’ll be hauling.
FAQ 10: What is the relationship between tire size and weight capacity in a dump trailer?
Larger tires generally have a higher load-carrying capacity. Ensure that the tires on your dump trailer are properly rated to handle the GVWR. Regularly inspect tire pressure and condition.
FAQ 11: Can I modify my dump trailer to increase its cubic yard capacity?
Modifying a dump trailer to increase its capacity is generally not recommended. It can compromise the trailer’s structural integrity and potentially void any warranties. Always consult with a qualified professional before making any modifications.
FAQ 12: Where can I find the cubic yard capacity and weight rating of my dump trailer?
The cubic yard capacity and GVWR are typically listed on a data plate affixed to the trailer. This plate usually includes other important information, such as the trailer’s VIN, axle ratings, and tire size. Consult your trailer’s owner’s manual for detailed specifications.