6′ 10″ × 16′ Tandem Axle Utility Trailer Plans – 7,000 lb or 10,400 lb GVWR

Product Overview

Build your own heavy-duty 6′ 10″ × 16′ Tandem Axle Utility Trailer with the professionally engineered MU716DS70 Utility Trailer Plans. Designed for builders who need strength, versatility, and customization, these plans allow you to build either a 7,000 lb or 10,400 lb Gross Vehicle Weight Rating (GVWR) trailer using tandem 3,500 lb or tandem 5,200 lb leaf spring axles.

Featuring a nominal 6′ 10″ × 16′ bed (actual bed length approximately 16′ 3.5″) and an overall legal width of 102″, this trailer provides plenty of deck space for hauling compact tractors, side-by-sides, UTVs, ATVs, cars, trucks, construction materials, equipment, lumber, pallets, landscaping supplies, and other oversized cargo.

The welded steel frame utilizes a heavy-duty straight tongue and is engineered for long-term durability and continuous use. Designed for demanding work and frequent hauling, the frame provides excellent strength while allowing you to configure the trailer with the options that best fit your needs, including multiple side styles, ramp options, tie-down locations, and decking choices.

These plans are packed with builder-selectable options including flatbed or side configurations, fold-down tailgate or loading ramp designs, hidden slide-out ramps, multiple tie-down systems, toolbox options, motorcycle stands, decking choices, straight or drop axle configurations, and even instructions for shortening the trailer to a 14-foot bed.

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Complete Plan Package Includes

Plan Model: MU716DS70 (7x16DS7010)

• 28 pages of detailed engineering drawings
• 15 pages of illustrated instructions, material cut lists, purchased components lists (BOM), engineering considerations, and practical building guidance
• Complete Material Cut List
• Purchased Components List (BOM)
• Straight Tongue Construction Details
• Tandem Axle Layouts for 7,000 lb and 10,400 lb GVWR Configurations
• Double-Eye or Slipper Leaf Spring Suspension Options
• Straight or Drop Axle Configurations
• Flatbed or Multiple Side Configurations
• Fold-Down Tailgate / Loading Ramp Option
• Hidden Slide-Out Ramp System
• Front Toolbox Mounting Option
• Motorcycle Stand Options
• Multiple Tie-Down Configurations
• 14-Foot Bed Conversion Instructions
• Multiple Decking Material Options
• Trailer Towing Tips and Practical Building Guidance

Steel, axles, suspension, coupler, jack, wheels, tires, lighting, decking, hardware, and fabrication materials are NOT included with the plans.

Matching trailer parts kits are available separately and were designed specifically for these plans:

7,000 lb Tandem Trailer Parts Kit

10,400 lb Tandem Trailer Parts Kit

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Available Plan Formats

Instant PDF Download

Download your plans immediately after checkout and begin your trailer build today. The downloadable ZIP file contains the complete engineering drawing package, illustrated instructions, material cut lists, purchased components lists (BOM), engineering notes, and supporting documentation.

Professionally Printed Paper Plans

Prefer working from paper in the shop? Choose our professionally printed plan package.

• Engineering drawings printed on 11″ × 17″ sheets for improved readability
• Instructions printed on standard 8.5″ × 11″ pages
• Shipped flat — never rolled or folded
• Free shipping within the lower 48 states

Important: Printed engineering drawings are provided for reference during construction and should never be scaled for dimensions. Always build using the dimensions and measurements provided within the plans.

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Customize Your Trailer Your Way

One of the biggest advantages of the MU716DS70 is the flexibility to build the trailer that best fits your needs. Rather than limiting you to one fixed design, these professionally engineered plans include numerous builder-selectable options so you can configure the trailer for your equipment, cargo, and towing requirements.

Whether you’re building a flatbed trailer, equipment trailer, landscape trailer, ATV trailer, UTV trailer, side-by-side trailer, contractor trailer, or a heavy-duty utility trailer, these plans provide the flexibility to create a trailer designed specifically for the way you work. Build a rugged flatbed for oversized cargo, add one of the included side configurations for landscaping or utility work, install a fold-down rear loading ramp, or choose the hidden slide-out ramp system for a cleaner trailer appearance. The plans also include instructions for shortening the trailer to a 14-foot bed if your application requires a more compact trailer.

• Flatbed or Multiple Side Configurations
• Fold-Down Tailgate / Loading Ramp
• Hidden Slide-Out Ramp System
• Double-Eye or Slipper Leaf Spring Suspension
• Straight or Drop Axle Configurations
• 7,000 lb or 10,400 lb GVWR Configurations
• 14-Foot Bed Conversion Included
• Front Toolbox Mounting Option
• Motorcycle Stand Options
• Multiple Tie-Down Configurations
• Multiple Decking Material Options

These options make the trailer suitable for hauling construction equipment, side-by-sides, compact tractors, lawn equipment, vehicles, lumber, pallets, motorcycles, landscaping materials, and general cargo.

Thinking about modifying the design? These plans already include numerous builder-selectable options. If you plan to make structural changes beyond those provided, we recommend reading When Safe to Customize the Plans before making modifications.

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Choose the Capacity That Fits Your Needs

One of the biggest advantages of the MU716DS70 is the ability to build either of two heavy-duty tandem axle trailer configurations using the same professionally engineered design.

• 7,000 lb GVWR Configuration — Uses tandem 3,500 lb leaf spring axles and is ideal for general utility, landscaping, recreational, farm, and commercial hauling.
• 10,400 lb GVWR Configuration — Uses tandem 5,200 lb leaf spring axles for increased carrying capacity and heavier-duty applications.

The plans include the proper frame specifications, material recommendations, structural details, and construction information for both configurations, allowing you to build the trailer that best fits your hauling requirements.

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Matching Trailer Parts Kits Available

Save time sourcing components with our trailer parts kits designed specifically for these plans. Each kit contains many of the major trailer components needed to complete your build.

7,000 lb Tandem Trailer Parts Kit

10,400 lb Tandem Trailer Parts Kit

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Professionally Engineered Plans

These trailer plans were professionally engineered by Synthesis Engineering Services. The engineering package evaluates the welded steel frame, straight tongue, tandem axle placement, suspension geometry, structural load paths, and connection points to provide a durable trailer designed for years of dependable service.

As with any trailer project, proper material selection, fabrication quality, welding, assembly, maintenance, loading practices, and compliance with applicable laws remain the responsibility of the builder.

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Recommended Builder Experience

Intermediate. Builders should have experience with welding, metal fabrication, trailer assembly, tandem axle suspension installation, trailer brake systems, trailer wiring, and safe fabrication practices. The illustrated instructions guide the construction process, but basic fabrication skills and appropriate shop equipment are recommended.

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Understanding GVWR and Payload

These plans allow you to build either of two heavy-duty trailer configurations:

• 7,000 lb GVWR — Tandem 3,500 lb axles
• 10,400 lb GVWR — Tandem 5,200 lb axles

Gross Vehicle Weight Rating (GVWR) is the maximum allowable weight of the completed trailer and everything loaded onto it. It is not the available payload.

The completed trailer weight will vary depending on which configuration you build and the options you choose. The base 7,000 lb flatbed trailer weighs approximately 1,100 lbs without decking and approximately 1,400 lbs with a wood deck. The 10,400 lb version will weigh more due to its heavier-duty running gear and structural components. Side configurations, ramps, decking materials, toolbox options, tie-downs, and other builder-selected features will also affect the finished trailer weight.

Available payload can be estimated using the following formula:

GVWR − Actual Completed Trailer Weight = Available Payload

For the most accurate payload calculation, weigh the completed trailer on a certified vehicle scale after construction. Always stay within the ratings of the trailer frame, suspension, axles, wheels, tires, coupler, hitch, safety chains, and all installed components.

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Frequently Asked Questions

What is included with these tandem axle utility trailer plans?

Each plan package includes 28 pages of detailed engineering drawings, 15 pages of illustrated instructions, material cut lists, purchased components lists (BOM), engineering considerations, and practical building guidance to help you successfully build your trailer.

Are trailer parts included with the plans?

No. The plans include the engineering documentation only. Steel, axles, suspension, brakes, coupler, jack, wheels, tires, lighting, decking, hardware, and fabrication materials are sold separately. Matching trailer parts kits are available for both the 7,000 lb and 10,400 lb GVWR configurations.

Can I build either the 7,000 lb or the 10,400 lb version?

Yes. These plans include engineering specifications for both configurations. Build either a 7,000 lb GVWR trailer using tandem 3,500 lb axles or a 10,400 lb GVWR trailer using tandem 5,200 lb axles. The plans provide the proper structural details, material recommendations, and construction guidance for each capacity.

Can I shorten the trailer?

Yes. Instructions are included for converting the trailer to a 14-foot bed, giving builders additional flexibility while remaining within the engineered design.

What ramp options are included?

The plans include both a traditional fold-down tailgate/loading ramp and a hidden slide-out ramp system that stores beneath the trailer deck when not in use.

Can I customize the trailer?

Yes. The plans include numerous builder-selectable options including flatbed or side configurations, tie-down layouts, front toolbox mounting, motorcycle stands, decking options, suspension choices, and multiple ramp styles. Before making structural modifications beyond the included options, we recommend reading When Safe to Customize the Plans.

Are the plans available as both PDF and printed copies?

Yes. Choose between an instant PDF download or professionally printed paper plans. Printed plans include 11″ × 17″ engineering drawings and 8.5″ × 11″ instruction sheets, shipped flat with free shipping throughout the lower 48 states.

What builder experience is recommended?

Intermediate. Builders should have experience with welding, metal fabrication, tandem axle suspension installation, trailer brake systems, trailer wiring, and structural steel fabrication. The illustrated instructions provide detailed guidance throughout the construction process.

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Why Choose Johnson Trailer Parts?

Johnson Trailer Parts has been helping customers build and maintain trailers since 2000. We proudly offer professionally engineered trailer plans, matching trailer parts kits, trailer axles, suspension systems, hydraulic components, lighting, and thousands of quality trailer parts backed by knowledgeable customer support before and after the sale.

Professionally engineered by Synthesis Engineering Services, these plans provide a durable, thoroughly engineered foundation with numerous builder-selectable options, allowing you to build a trailer that fits your exact hauling needs while maintaining the integrity of the original design.

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Questions?

Need help selecting the correct trailer plans or matching trailer parts kit? Our experienced team is here to help.

Johnson Trailer Parts
Call or Text: (602) 292-9690
Email: sales@johnsontrailerparts.com