4′ x 8′ – 3500# – Torsion Axle Trailer Plans
4′ x 8′ – 3500# – Torsion Axle Trailer Plans
Fully Engineered Blueprints are just the start with these Torsion Axle Utility Trailer Plans. With the deck a little larger than tradition, you can put true 4′ x 8′ cargo inside! Up to 3500 lbs.
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$ 18.99 - Complete Plans
* Plans are in a computer document. You may Save them to your computer immediately after Payment.
Description
Description
A workhorse trailer that’s the perfect size for many people. These plans are designed with Full Engineering for an excellent 4′ x 8′ – 3500# utility trailer with a torsion axle. An excellent choice for all sorts of yard and garden, home remodeling and other chores. Plus it’s not so big for storing.
These plans include a lot more than just the trailer. Our competitors sell plans for a specific trailer. Not us. These plans include lots of options so you can build the trailer to do the things you need a trailer for. We know one trailer does not meet all needs, so choose from options in the plans, or add your own.
This is a tough, 4′ x 8′ torsion axle trailer design, with full 3500# strength as a flat bed. While you can add sides (options are in the plans), they are not necessary for full strength. See more product detail by looking at the 4′ x 8′ – 3500# leaf spring suspension utility trailer. They are similar, with the same options, except the axle.
We have alternate sizes — like 4×8-2000# or 5×8-3500# — if that works better.
If you prefer a leaf spring suspension, we have plans for that too.
Open “Alternate Sizes & Conversions” below to make this a Tilt Top Trailer.
Specifications
Specifications
4′ x 8′ – 3500# – Torsion Axle Trailer Plans
- 4′ x 8′ Functional Bed Size (inside the frame rails for true 4′ Cargo width).
- Plywood and other materials will fit in this trailer without damage to the edges.
- Torsion Axle Utility Trailer – 3500 lb. Capacity – Designed for a Single, Torsion Axle.
- Welded steel frame design.
- Has design options for building a Ramp, and Sides. Build it the way you want it.
- While trailer weight varies with design options, the minimal flat bed is approximately 550 lbs. Weight goes up with options. See our FAQ on trailer weight.
- Blueprints include an optional Motorcycle Rack and lots of Tie-Down Options.
- Because you deserve it complete, plans include full Drawings and illustrated Instructions.
More About The Design Features
More About The Design Features
Plans are fully engineered and include easy to follow, illustrated instructions, with a parts list, and recommendations for materials and components. Then, because it’s your trailer, we include options for customizing — so you can build it to do what you want. (See the images to view some of the options.)
We recommend looking through the options, then choose the ones that will make the trailer perfect for you. Use our ideas, or some of your own. While you may want a simple plain trailer, there are options too. A top, sides or tailgate. Maybe a ramp, a tongue mounted toolbox, tie-down bars, or something else.

4′ x 8′ – 3500# Torsion Axle Trailer Technical Information:
- True trailer bed size is 4 ft. 4″ wide by 8 ft. 3.5″. long — for a full usable 4′ x 8′ deck size, even with added sides.
- A little bigger than tradition, because we think cargo space is a better measure for utility trailer size.
- Overall length including the tongue is ~147 inches. (Can vary with options.)
- Trailer bed height depends on design options and can range from 16 inches up. (Bed height shown is 20″.)
- Max capacity (depending on options) is 4′ x 8′ – 3500# * including the trailer.
- True Torsion Axle Utility Trailer Design — Engineered for long life — even when fully loading the torsion axle.
- Check out all the construction tips and advice to get your trailer built perfect.
Alternate Sizes & Conversions
Alternate Sizes & Conversions
Not Quite The Perfect Trailer? Check These Too.
- Same Size, Different Axle – 4×8 – 3500 lbs Utility Trailer
- Same Size, Lower Capacity – 4×8 – 2000 lbs Utility Trailer w/Torsion Axle
- One Size Wider – 5×8 – 3500 lbs Utility Trailer w/Torsion Axle
More trailer sizes and variations are available. See All Trailer Plans.
Make It A Tilt Top?
If you want this trailer as a Tilt Top, we have Plans for the Conversion. They show how to make this trailer with a tilting top, like in the image.
Conversion plans are sold separate. You will need both the above Trailer Plans and these Tilt Top Conversion Plans.
$ 9.99 - Complete Plans Add To Cart
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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