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The Ultimate Guide to Flatbed Semi Trailers: Types, Dimensions, and Benefits
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Flatbed semi trailers are the backbone of heavy-duty freight transport, ideal for hauling oversized or irregularly shaped cargo. This guide explains the types of flatbed trailers—standard, step deck, extendable, lowboy, RGN, and curtainside—along with their key dimensions and advantages. Whether you're in construction, logistics, or industrial transport, understanding flatbed capabilities is essential for choosing the right equipment. Explore how flatbeds offer unmatched versatility, accessibility, and hauling power.
Flatbed semi trailers are essential tools in freight transport, known for their unmatched flexibility in hauling oversized or irregularly shaped cargo. Unlike enclosed trailers, flatbeds consist of a standard tractor unit and an open, level bed with no roof or sides—making them easy to load and unload from any direction. This design offers a versatile solution for logistics companies, construction projects, and industrial equipment transport.
What Is a Flatbed Semi Trailer?
A flatbed semi trailer is composed of a truck tractor and a flatbed trailer designed to haul loads that don’t fit within standard enclosed trailers. These trailers are ideal for carrying large construction materials, heavy machinery, oversized industrial parts, and more. Their open design simplifies loading and unloading using forklifts or cranes, and makes it possible to haul extremely wide or tall items.
Types of Flatbed Trailers
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Standard Flatbed – Fully flat from front to back, typically 48–53 feet long, suitable for most general cargo.
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Step Deck (Drop Deck) – Features two levels of deck height, allowing for taller cargo on the lower deck.
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Extendable Flatbed – Equipped with a sliding mechanism to increase the trailer length up to 80 feet for extra-long items.
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Lowboy (Double Drop) – Has two drops that allow the trailer body to sit lower than the wheels, making it perfect for extremely tall loads.
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Removable Gooseneck (RGN) – Allows the front of the trailer to detach and serve as a ramp for driving heavy equipment onto the bed.
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Curtainside/Conestoga – Offers a tarped covering for weather protection while still allowing side access for loading.
Standard Flatbed Trailer Dimensions
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Length: 48–53 feet
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Width: 8.5 feet
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Height (from ground): 5 feet
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Maximum legal cargo height: 8.5 feet (overall trailer height limit is 13'6")
Benefits of Flatbed Hauling
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Versatility: Suitable for almost any freight size and shape
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Ease of Access: Load and unload from all sides
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Increased Capacity: Carry heavy and bulky materials with fewer trips
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Wide Range of Options: Multiple trailer types to meet specific hauling needs
Usage Tips and Compliance
Maintaining legal height and weight limits is crucial when transporting oversized loads. Using FMCSA-compliant ELD systems, GPS tracking, and AI-powered fleet safety tools helps ensure compliance and enhances operational efficiency.
About WONDEE
Founded in 1999, WONDEE AUTOPARTS is a one-stop supplier of semi trailers and trailer components. From flatbed trailers and axles to suspension systems and brake components, WONDEE has become a global provider trusted in over 25 countries. With more than two decades of experience, we are committed to quality and helping customers succeed in their local markets.
Explore More Flatbed Semi Trailer Solutions:
Wondee Flatbed Project Catalog
flatbed semi trailer,trailer types
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