Johnson Trailer Parts 8.5 ft x 18.5 ft Car Hauler Trailer Plans, 10.4K or 12K Capacity, DIY Blueprints, Step-by-Step Instructions, MU718DS120o

Johnson Trailer Parts 8' 6" x 18.5' Car Hauler Trailer Plans with Drive-over Fenders, MU718DS120o Trailer BlueprintsBuild your own heavy-duty 8' 6" x 18.5' car hauler / equipment trailer with drive over fenders using these detailed MU718DS120o blueprints. Designed for a 10,400 lb or 12,000 lb capacity tandem axle trailer, this plan set includes step-by-step instructions, steel cut list, material guidance, and fabrication details for a strong fixed-deck design. Engineered by Synthesis Engineering Services, Inc. for a precise, heavy-duty trailer design.Specifications:Model: MU718DS120o Bed Size: 8' 6" x 18.5' Max Capacity: 10,400lbs or 12,000 lbs Trailer Type: Car Hauler / Equipment Trailer Axle Configuration: Tandem Straight Axle Frame: Welded steel, with I-Beams, Angle, Tube, Flat and C-ChannelThis plan package includes 45 pages of drawings plus 21 pages of instructions. Pages ship flat for easier use on a standard workbench and are easier to handle in the shop than rolled plans while still providing large, detailed drawings.Optional features include deck style choices, ramp configurations, tie-down anchor options, front rail choices, winch mounting, and jack options. Johnson Trailer Parts also offers a matching trailer parts kit for this plan. Ideal for Do-It-Yourselfers, Builders, and Shop Classes.Note: These blueprints show how to build the trailer and install major components. They do not include physical trailer parts or instructions for manufacturing axles or other trailer hardware.Legal Notice: 2026 Johnson Trailer Parts. All rights reserved. These plans are licensed for personal use only. Copying, scanning, digital sharing, distribution, or reselling of this publication is strictly prohibited under U.S. copyright law.

• Car Hauler Trailer Plans: Detailed engineered blueprints with step-by-step instructions for building a 8 ft 6 in x 18.5 ft car hauler / equipment trailer with drive over fenders from the ground up. Includes steel cut list, material guidance, and fabrication details for a strong fixed-deck design
• 10.4K to 12K Capacity Design: Engineered for a heavy-duty tandem straight axle configuration with a 10,400 lb or 12,000 lb maximum capacity. Ideal for hauling cars, equipment, machinery, and general-purpose cargo
• Detailed Drawings Shipped Flat: Includes 45 pages of drawings plus 21 pages of instructions. Ships flat for easier use on a standard workbench without the frustration of rolled-up plans
• Component Installation & Mounting: Includes layout and mounting guidance for standard trailer axles and related trailer components. These plans show how to build the trailer and install major components, but do not include instructions for manufacturing axles or other trailer parts
• Customizable Build Options: Includes multiple options such as deck style choices, ramp configurations, tie-down anchor options, front rail choices, winch mounting, and jack options to help tailor the trailer to your build