6’10” x 16′ – 12K to 16K – Utility Trailer Plans
A large utility trailer, at full (legal) width and 16’ length – with options for 12,000 lbs or 16,000 lbs capacity. Trailer plans include many options for you to configure it to your specific needs.
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Description
Description
Industrial heavy duty flatbed trailer plans. As you expect, these plans include full engineering so you can build with confidence. This is our biggest, strongest, beefiest utility trailer, and the design is very tough for continual heavy duty use.
But it is not just the engineering or the flatbed trailer from the plans. Options are what make the trailer. Things like length, total capacity, various sides and gates and ramps are all options because the design is for you – to make a trailer that is perfect for you.
Options for capacity are the axle sets, certainly, as well as variations with the beams to meet the balance of weight and strength. It is all part of the design and engineering.

We design the trailer for strength, then give you a bunch of options to choose. Build it the way you want it – with confidence.
Similar Products
– Please see the 6’10″x 16′ Trailer plans with options of 7-10K for a lighter trailer in this same overall size.
– Learn about trailers with a design specifically for the needs of a Tiny House Foundation.
Specifications
Specifications
6’10” x 16′ – 12K to 16K – Utility Trailer Plans
- Tandem axle, leaf spring design — use eye-eye style or slippers.
- 6’10” x 16′ nominal bed size. (Actual size is a little longer.) Total width at the fenders is 102″.
- Instructions include options for narrowing the bed and for shortening it. Specifically, a 14′ bed length option is given.
- Options for capacity include 12,000 lb. or 14,000 lb. or 16,000 lb. full trailer capacity. These plans include specifications for each capacity option.
- Frame is steel, welded construction.
- Choose a folding Tailgate/Ramp combination, or a slide to store under the bed removable / hidden ramp.
- Multiple options for the trailer bed and for tie-down points.
- Build it as a flatbed, or choose one of the various options for building sides that are included.
- Plans include full drawings and illustrated instructions.
More About The Design Features
More About The Design Features
Options, Options, Options. While these pages show one flatbed trailer example from the plans, there are many variations. Since size and loading variations are similar, just make the trailer exactly the way you want. Customizing for the perfect trailer is the way to go.

Get the plans, then use the options within, or add your own.
Plans With Base Flatbed Trailer
- * Trailers built from these flatbed trailer plans have an actual bed width of 6 feet 10 inches, and bed length of 16 feet 3.5 inches including the steel frame.
- Overall length including the tongue is approximately 246 inches, though that will vary some with options chosen.
- While actual trailer bed height will depend on design options chosen, typical choices will range from 20″ up. (Bed height shown is ~22″ using drop axles.)
- Plans include options for max load capacity — 12,000 lbs or 14,000 lbs or 16,000 lbs — (combined axle rating)* which includes the trailer weight.
- Trailer weight will vary depending on design options. The 14K base flatbed trailer plans is ~1500+ lbs without the deck, something in the range of 1900-2000 lbs with decking. The heavier capacity trailer will weight more, then decking choices, sides and other options will change the weight too.
- Lots of options are in the plans. Things like sides, a tailgate, a mounted toolbox, ramps, motorcycle stands, etc. are there for optional functionality. Some options are mutually exclusive. Not all options are in the pictures here.
While the base design is the flatbed trailer plans, we know options rule. Build the trailer to meet your needs.
Maximizing Your Project
Plans from Mechanical Elements are an awesome start to a great project. Here are even more resources!
First: For more info, please read: What's In The Plans? and What Makes Our Trailer Plans Better?
Second: Purchase plans with the "Add to Cart" button, then right after payment, a digital copy is ready to save to your computer. Please see this article for answers about getting the plans.
Third: We have many articles to help with trailer building. Just type a question in the Show Me bar (top of this page), then press "GO". Or, for simple browsing, visit Articles from the Mechanic.
Reminder:
Trailer building requires metal working skill and tools for things like cutting, drilling, and accurate set-up, as well as welding skill. Strength, durability, and enjoyment depend on building the trailer well. Build it well, then Enjoy the Finished Project !!
Notes for Success
* Trailer load capacity depends on all the parts and materials, as well as the craftsmanship in building. All Mechanical Elements trailers are engineered to perform as stated when built as defined with proper care in construction – including parts, material, construction techniques, weld integrity, assembly methods, and finishing. Capacity for this trailer also requires proper choices for parts such as the hitch, axle(s), wheels, tires, safety chain, decking, bolts, pins, etc. Please make sure component load capacities match or exceed the trailer total capacity. Do not exceed manufacturers limits.
For trouble-free trailer life, think care and safety. Please select fastening methods to handle how and where the trailer will operate – including vibration, proper fastener types, bolt grades, torques, and nut types (like lock nuts). Then, be smart about loading the trailer, load distribution, tire pressure, tire condition and the mechanics of towing. We want you safe to enjoy your trailer for a long time ahead. Always use proper safety and securing equipment when loading and towing a trailer.
Thank You — The Mechanical Elements Team
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