Collection: Sub Cross Sill

Trailer Sub Cross Sills — Strengthen Your Trailer Floor and Frame

Reinforce your cargo or utility trailer with high-quality sub cross sills from Kampco Steel Products. Designed to provide structural support under the trailer floor, our sub cross sills help distribute weight evenly, prevent sagging, and extend the life of your trailer. Ideal for new builds, floor repairs, or heavy-duty load applications, these components are a critical part of a strong, durable trailer frame.

Why Choose Our Sub Cross Sills

• Heavy-Duty Construction: Made from steel for superior strength and long-lasting durability.

• Load-Bearing Support: Reinforces the trailer floor and frame, helping prevent sagging and structural fatigue.

• Precision Sizes & Profiles: Available in multiple lengths and cross-sectional sizes to fit a variety of trailer widths and floor designs.

• Easy Installation: Designed for straightforward bolting or welding into trailer frames, reducing labor time.

• Durability You Can Trust: Built to withstand heavy cargo, road vibration, and long-term use.

Ideal for Cargo & Utility Trailer Builders

Whether you’re constructing a new trailer, replacing worn floor supports, or upgrading a heavy-duty hauler, Kampco sub cross sills provide the stability and reinforcement needed to keep your trailer strong, level, and road-ready.

Browse our Sub Cross Sills below to select the right size and material for your project — and ensure your trailer’s foundation is as strong as its frame.