A Comprehensive Guide to Semi-trailers

Welcome to TEC Equipment's all-encompassing guide to semi-trailers.

This guide is designed to cater to both beginners in the trucking industry and seasoned professionals. We aim to provide you with valuable insights into:

A semi-trailer is a specialized type of trailer that is towed by a tractor unit or a semi-truck. It's a crucial component of the logistics industry, facilitating the transportation of goods and materials over long distances. A semi-trailer differs from a full trailer in that it lacks a front axle and relies on the tractor unit for support and propulsion.

Key components of a semi-trailer include:

Semi-trailers come in a variety of sizes and configurations to accommodate different types of cargo, such as dry goods, refrigerated goods, or bulk materials. They play a vital role in the supply chain, enabling efficient and reliable transportation of goods across the country.

The world of semi-trailers is diverse, with various types designed to cater to different transportation needs. There are four common types of trailers: flatbed trailers, dry van trailers, refrigerated trailers, and vocational trailers.

Flatbed trailers are versatile and widely used in the logistics industry. They consist of a flat, open deck with no walls or roof, which facilitates easy loading and unloading of goods from any side. Flatbed trailers are commonly used for transporting large and heavy items such as construction materials, machinery, and vehicles.

Dry van trailers provide a secure and weatherproof environment for transporting goods. These trailers have walls and a roof, protecting the cargo from external elements and potential theft. Dry vans are commonly used for transporting sensitive or valuable goods like electronics, furniture, or pharmaceutical products.

Refrigerated trailers, or 'reefers', are designed to transport perishable goods at controlled temperatures. These trailers are equipped with a cooling system that maintains a consistent temperature throughout the journey, preserving the freshness and quality of the cargo. Refrigerated trailers are essential for transporting food products, pharmaceuticals, and other temperature-sensitive items.

Vocational trailers cater to specific industries or applications with unique transportation requirements. These trailers are designed to handle specialized cargo or equipment, making them indispensable in various sectors such as construction, agriculture, and energy. Vocational trailers can include dump trailers for hauling bulk materials like gravel or soil, tanker trailers for transporting liquids such as fuel or chemicals, and utility trailers for carrying equipment and tools to job sites.

At TEC Equipment, we provide a wide range of semi-trailers from top brands like Wabash, BWS, and MAC Trailer. Whether you need a flatbed, a dry van, a refrigerated trailer, or a vocational trailer, our team is committed to offering top-quality trailers that are reliable, durable, and efficient.

Selecting the right semi-trailer is a critical decision that can significantly impact your operations, ensuring efficiency, safety, and cost-effectiveness. Here are a few factors to consider when choosing your trailer:

Semi-trailers come in various dimensions and weight limits, each designed to meet specific transportation needs. Understanding these two specifications are crucial when selecting the right trailer for your business: dimensions and weight limits, and payload capacity.

Dimensions and weight limits of semi-trailers:

In the United States, semi-trailers typically adhere to standard dimensions to ensure compatibility with highways and loading docks. The maximum legal length for a semi-trailer is 53 feet, with a maximum width of 8.5 feet. The height limit is usually about 13.5 feet. These limits ensure compliance with transportation regulations and safe passage.

Weight limits vary depending on the type of trailer and the number of axles. A standard tandem axle trailer can typically carry up to 40,000 pounds of cargo. However, individual states may have specific weight restrictions, making it essential to consult local regulations to ensure compliance.

Payload capacity of semi-trailers:

The payload capacity refers to the maximum weight of cargo a semi-trailer can carry. This capacity is determined by subtracting the trailer's tare weight from its gross vehicle weight rating (GVWR). For example, if a trailer has a GVWR of 80,000 pounds and a tare weight of 20,000 pounds, its payload capacity would be 60,000 pounds.

Considering the payload capacity when selecting a semi-trailer is critical to avoid overloading, which can lead to safety hazards, fines, and potential damage to the trailer or goods being transported.

By following these maintenance and safety tips, you can keep your semi-trailers in optimal condition, reduce the risk of accidents, and protect your drivers and cargo.

With over 48 years of industry experience, we are known for providing our customers with top-notch full-service care. From sale to service we are here to be your partner throughout the entire lifetime of your equipment.

The TEC Network: When you buy with TEC, you instantly gain access to the TEC network. With over 30 locations across 8 states, a trusted TEC location is never too far away. Our size and reach allow us to offer high-quality equipment at competitive prices and convenient locations. From sales to parts and service, we are truly a full-service solution for all of your trailer needs.

Top Brands: Our long-lasting relationships with trusted manufacturers ensure we offer trailers from reputable brands like Wabash, MAC Trailer, BWS, and Cottrell known for their quality and performance.

Parts and Service: Our after-sales support is second to none. From helping you choose the right trailer, stocking the parts you need, warranty coverage, and offering maintenance and repair services, we’re committed to your satisfaction.

Financing: TEC Equipment also provides flexible financing options to make your purchase more affordable. Our finance specialists can help you find the best financing solution tailored to your budget and needs.

Choosing TEC Equipment as your dealership means you're investing in a reliable semi-trailer supported by the expansive TEC network.

Common semi-trailer types include dry vans, refrigerated trailers, flatbeds, equipment trailers, dump trailers, tank trailers, transfer trailers, and auto transport trailers. Each design supports a different freight type or operating application.

A semi-trailer does not have a front axle and relies on the tractor to support part of its weight. A full trailer supports its own weight through front and rear axles and connects to the towing vehicle with a drawbar.

Dry vans and flatbeds are two of the most versatile options. Dry vans can carry many types of protected freight, while flatbeds can accommodate large, irregular, or crane-loaded cargo.

A refrigerated trailer, or reefer, carries temperature-sensitive freight. Reefers use insulated cargo bodies and refrigeration units to maintain controlled temperatures during transportation.

Lowboy, detachable gooseneck, hydraulic tail, tilt-deck, and other equipment trailers can carry construction and agricultural machinery. The correct configuration depends on equipment weight, dimensions, clearance, and loading requirements.

Many dry van and refrigerated trailers measure 53 feet long, but semi-trailer dimensions vary by type and application. Flatbeds, equipment trailers, tanks, dumps, and auto transport trailers use different lengths and configurations.

The legal payload depends on the trailer’s empty weight, axle configuration, tractor weight, axle spacing, freight distribution, and applicable regulations. Buyers should calculate capacity using the complete tractor-trailer combination.

A new trailer may provide current specifications, customization opportunities, and warranty coverage. A used trailer may reduce acquisition cost and provide immediate availability. Compare condition, maintenance history, specifications, price, and expected utilization before deciding.

Inspect the frame, kingpin, landing gear, suspension, axles, brakes, tires, floor, deck, walls, roof, doors, air system, and electrical system. For specialized trailers, also inspect refrigeration, hydraulic, pumping, or loading equipment.

TEC Equipment provides trailer inspections, preventive maintenance, repair, parts, and equipment support through its dealership network. Service availability and capabilities can vary by location.