The Southland SL714-14KHS is a heavy-duty dump trailer engineered for professionals who need to maximize volume and payload without compromising on durability. The "HS" (High Side) designation signifies its 40-inch integrated steel walls, providing the extra capacity needed for high-volume materials.
1. Volumetric Capacity: 11.5 Cubic Yards
The standout feature of the HS model is its massive increase in storage volume.
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The Math: A standard 14ft dump trailer with 2-foot sides typically holds about 7 cubic yards. By increasing the walls to 40 inches, the SL714-14KHS offers approximately 11.5 cubic yards of level-load capacity.
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Material Constraints: While this extra room is a game-changer for "light" high-volume debris like mulch, brush, or demolition waste, users should note that denser materials like asphalt shingles will likely reach the trailer’s weight limit (approx. 5 tons) before the 11.5-yard volume is fully utilized.
2. Structural Integrity & High-Side Design
While wall bowing under the pressure of heavy loads is a genuine engineering risk for high-sided trailers, it is often an overlooked detail by end users until damage occurs. Unlike flat metal walls that can bow or sustain permanent damage from internal impacts, the SL714-14KHS features a central reinforcement ridge.
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Reinforcement: This ridge acts as a structural spine, allowing the sides to maintain their shape even under hard impacts from scrap, rock, or heavy debris.
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Design Heritage: This ridge also marks the point where the standard 2-foot side height ends, seamlessly integrating the high-side extension while maintaining the proven geometry of the SL714 series.
3. Industry-Leading Payload Efficiency
While high-side trailers typically add significant curb weight due to the extra steel, Southland utilized HSS (Hollow Structural Steel) tubing to keep the weight of this model at approximately 4,100 lbs.
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Maximum Capacity: With two 7K axles, this trailer offers nearly 10,000 lbs (5 tons) of legal carrying capacity.
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Comparison: This is a significant advantage; the SL714-14KHS is so weight-efficient that it actually weighs less than many competitors' standard 2-foot side height dumps, leaving more room for your actual cargo.
4. Upgraded Lifting Power & Hydraulics
The 2026 models, which launched in mid-2025, introduced a significant hydraulic upgrade to handle the increased potential for heavy loads associated with high-side volume.
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6-Inch Bore Cylinder: Southland moved from the industry-standard 5-inch to a 6-inch bore cylinder, significantly increasing total lifting power.
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Negative Leverage Protection: This extra power is crucial if a load is placed too far forward in the box—a common occurrence in roofing or dirt work. It provides the "breakout" force necessary to tip the box in situations where standard cylinders might struggle or bypass.
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Stability: Unlike telescopic cylinders which can be prone to tipping, this scissor-lift system maintains a low center of gravity and high frame stability during the dump cycle.
5. Advanced Standard Features
Southland includes several "premium" utilities as standard equipment to ensure the trailer remains job-ready for years.
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Solar Charging System: Each unit features a 10W solar charger mounted on the tool box. This acts as a battery maintainer, ensuring the battery doesn't die during storage or between long hauls.
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Heavy-Duty 10K Jack: While a 7K jack is an efficient and reliable choice for the standard SL714-14K, the HS model was upgraded to a 10K Jack. This change accounts for the fact that users can much more easily overload a high-sided trailer; the 10K jack provides the necessary safety margin to prevent jack failure when the trailer is at or above maximum capacity (even though, of course, no one ever overloads their dump trailer).
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Aluminum Ramps: The trailer includes two aluminum ramps, each with a 4,000 lb midspan rating. Because of how weight is diffused as it moves away from the center, these ramps are significantly more capable than their rating suggests and are more durable than traditional C-channel steel alternatives.
Competitive Comparison at a Glance
| Feature | Southland SL714-14KHS | Industry Standard (14K Class) |
| Volume (Cubic Yards) | 11.5 cu. yd. | ~7.0 cu. yd. (Standard 2ft) |
| Frame Type | 6" x 2" HSS Tubing | 6" Channel or 8" I-Beam |
| Curb Weight | ~4,100 lbs | ~4,600 – 5,000 lbs |
| Max Payload | ~11,300 lbs | ~10,400 – 10,800 lbs |
| Side Height | 40" Reinforced | 24" or 48" Flat |
| Lift System | 6" Bore Scissor Hoist | 5" Bore Scissor Hoist |
| Charging | 10W Solar + 110V Plug | Often Optional or Aftermarket |
If you you think the SL714-14K is the trailer you need check our available inventory below. If you have further questions you can reach us at 303-286-7293 or Sales@jayhawktrailers.com
