A standard step deck trailer, also known as a drop deck trailer, typically has a lower deck height of around 3 feet (36 inches) from the ground, while the upper deck, or “step,” will be at the standard semi-trailer height of roughly 5 feet (60 inches). This design allows for the transportation of taller cargo without exceeding legal height restrictions.
Understanding Step Deck Trailer Dimensions
Step deck trailers are essential tools in the freight industry, offering a versatile solution for hauling cargo that exceeds the height limits of traditional flatbed trailers. Their unique design, featuring a lower deck and a higher “step,” makes them ideal for transporting items like machinery, equipment, and other over-dimensional loads. Let’s delve deeper into the specific dimensions and explore the factors that influence them.
Key Measurement Points
Understanding the different measurement points is crucial when discussing step deck trailer height. Here’s a breakdown:
- Overall Height: This refers to the total height of the trailer, including the cargo, from the ground. Exceeding legal height limits can result in fines and delays.
- Lower Deck Height: As mentioned earlier, this is typically around 3 feet (36 inches). It’s the primary benefit of a step deck, allowing for taller cargo.
- Upper Deck Height: This section of the trailer sits at the standard semi-trailer height, usually around 5 feet (60 inches).
- Well Length: This refers to the length of the lower deck and is a critical factor in determining the type and size of cargo it can accommodate. Standard lengths range from 10 to 37 feet.
- Overall Length: Step decks are generally 48 to 53 feet long, with the well length affecting the length of the upper deck.
Factors Influencing Height
Several factors can influence the actual height of a step deck trailer:
- Manufacturer Specifications: Different manufacturers may have slightly varying specifications for their trailers.
- Suspension Type: Air ride suspensions can be adjusted to some degree, potentially affecting the overall height.
- Tire Size: Tire size can minimally affect the height of the trailer, although this difference is usually negligible.
- Cargo Weight: A heavily loaded trailer will sit lower to the ground due to suspension compression.
Navigating Legal Height Restrictions
The legal height limits for trailers vary by state and region. However, a common maximum legal height for cargo and trailer combined is 13 feet 6 inches (162 inches). It’s the responsibility of the carrier and shipper to ensure that the loaded trailer stays within these limits.
Failure to comply with legal height restrictions can lead to:
- Fines: Penalties for exceeding height limits can be substantial.
- Delays: Over-height loads may be stopped by authorities, causing significant delays in delivery.
- Safety Hazards: Exceeding height limits can create safety hazards, particularly when passing under bridges or overpasses.
Therefore, accurate measurement and careful planning are crucial when transporting tall cargo on a step deck trailer. Utilizing permits for over-dimensional loads when necessary is also paramount.
Frequently Asked Questions (FAQs) About Step Deck Trailer Height
Here are some commonly asked questions about step deck trailer height, designed to provide further clarity and practical guidance:
FAQ 1: What is the average weight capacity of a step deck trailer?
Most step deck trailers have a maximum weight capacity of around 48,000 pounds. However, this can vary depending on the trailer’s construction and axle configuration. Always consult the manufacturer’s specifications for the exact weight limit.
FAQ 2: Can I adjust the height of a step deck trailer?
While you can’t directly adjust the deck height itself, trailers with air ride suspensions allow for some degree of height adjustment. This can be helpful for navigating uneven terrain or loading docks but shouldn’t be used to circumvent legal height limits.
FAQ 3: How do I measure the height of my cargo on a step deck trailer?
The most accurate method is to use a telescoping measuring pole. Ensure the trailer is parked on a level surface, and measure from the ground to the highest point of the cargo.
FAQ 4: What are the advantages of using a step deck trailer over a standard flatbed?
The primary advantage is the ability to transport taller cargo without exceeding legal height restrictions. Step decks also often come equipped with ramps for easier loading and unloading of equipment.
FAQ 5: Are there different types of step deck trailers with varying heights?
Yes, there are variations. RGN (Removable Gooseneck) trailers, which are a type of step deck, can have even lower deck heights, particularly in the gooseneck section, for extremely tall loads. Conestoga step decks have a retractable tarping system that may add to the overall height.
FAQ 6: What is the legal definition of an “over-dimensional” load?
Generally, an over-dimensional load exceeds legal limits for height, width, length, or weight. If your cargo exceeds 13 feet 6 inches in height, it’s typically considered over-dimensional and requires permits.
FAQ 7: What is the process for obtaining an over-dimensional load permit?
The process varies by state. It usually involves submitting an application to the relevant state transportation agency, providing details about the load dimensions, weight, route, and carrier information.
FAQ 8: What is a “double drop” trailer and how does its height compare to a step deck?
A double drop trailer has two drops, resulting in an even lower center well than a step deck. Its lower deck height is significantly less than a step deck, allowing for the transport of extremely tall items.
FAQ 9: How does the “step” section of a step deck trailer affect the overall length of the lower deck?
The length of the “step” section deducts from the total available length of the lower deck. A longer “step” means a shorter lower deck.
FAQ 10: What should I do if my cargo is slightly over the legal height limit?
You have a few options: reconfigure the load to reduce its height, utilize a different type of trailer (like a double drop), or obtain an over-dimensional permit. Attempting to transport an over-height load without proper authorization is risky and illegal.
FAQ 11: How do I choose the right step deck trailer for my cargo?
Consider the dimensions and weight of your cargo, the required loading method, and any specific requirements, such as ramps or securement points. Consult with a reputable trucking company or freight broker for expert advice.
FAQ 12: Are there any specific safety precautions to take when hauling tall loads on a step deck trailer?
Yes. Ensure the load is properly secured using appropriate tie-downs and straps. Regularly check the load during transit and be aware of overhead obstructions like bridges and power lines. Driving at slower speeds and maintaining a safe following distance are also crucial.
By understanding the dimensions of step deck trailers and the factors that influence them, shippers and carriers can ensure safe and compliant transportation of oversized cargo. Prioritize careful planning, accurate measurements, and adherence to all applicable regulations to avoid costly fines and potential safety hazards.