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I need complete structural design packages for trailers that can haul general cargo flat bed equipment trailers and trailers for boats. One specific trailer for boats will be a heavy hydraulic lifting trailer capable for adjusting width and using 6-10 different hydraulic rests for lifting the boat. This specific trailer should have the ability to pick and lift and place boat stands and drive out. The other finished units will vary in length 20–30’ with an 8.5’ overall width, and weight capacity’s ranging from 2k lbs per to 35-40k lbs steel and aluminum variations and the needed materials to construct to keep weight down while still meeting highway and ramp loading demands. Here’s what I expect: • Fabrication drawings (plan, elevation, sections and individual part sheets) ready for a fabricator to cut, drill and weld. • A concise engineering report with global load calculations, axle reactions, frame deflection checks and stress verification for bending, shear and torsion under dynamic road loads as well as point loads at boat-support pads. • Connection detailing that spells out weld sizes, bolt grades, torque specs and any required isolation between dissimilar metals where steel meets aluminum. • A clear material call-out schedule, including recommended steel grades, marine-grade aluminum sections and standard off-the-shelf components (axles, couplers, brakes, lights). • Native CAD files (SolidWorks or Inventor preferred) plus PDF drawings. Acceptance criteria The frame must meet or exceed applicable trailer standards in my region (DOT/FMVSS or equivalent), stay within the stated envelope, and show a minimum safety factor of 2.0 on all primary members. All calculations should be reproducible, and the drawing set must be complete enough for direct fabrication with no guesswork. If you routinely run FEA, use SolidWorks Simulation, ANSYS or similar and have past trailer or small mobile platform projects in your portfolio, this will be a straightforward collaboration. I’m ready to clarify local regulations or axle kits on request and will approve milestones as each deliverable is submitted. I have a list of materials we are currently using today and would like to keep using these items going forward. Mainly the axles and steel cross members. I can send a list of items and some technical drawings for these parts. We are seeking to go fully custom with designs and techniques from around the world to give our market the newest and greatest our tech has to offer. Plans will need to also include bending schedules and plans to make dies for hydraulic bender. Currently for a test sample run I can open budget based on 1 full set. And then prefer to use similar designs scaled for different use case. Ideally 8-10 finished complete designs. Engineering stamp will be a requirement for all testing and calculations to be verified. All work completed will be exclusively the ownership of the hiring party and will be subject to non disclosure for all files and data relating to the building and designs
Project ID: 40624860
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23 freelancers are bidding on average $1,154 USD for this job

With extensive expertise in CAD modeling, 3D animation, and technical design solutions, I'm well-positioned to cater to your custom trailer needs efficiently and effectively. My specialized skills in product design and architectural drafting align perfectly with your project requirements, allowing me to deliver precise geometric designs that are clean, durable and ready for production. By consistently maintaining a strong focus on clarity and polished results, I am confident in my ability to meet or exceed your expectations.
$753 USD in 2 days
5.3
5.3

The hardest part of this job is detailing the hydraulic lifting trailer for boats, so the mechanism for adjusting width and using those multiple hydraulic rests needs precise engineering to be functional and safe. I will build the fabrication drawings using AutoCAD, showing plan, elevation, and section views for all trailer frames, also detailing individual parts for both general cargo flatbeds and boat trailers. For the specific boat trailer, I will design the hydraulic lift system, specifying cylinder sizes, pivot points, and control linkages, so it can lift and place boats accurately. I will also specify material thickness and joint types in the drawings to meet the weight capacities requested for the 20-30' trailers, from 2k lbs up to 40k lbs, in steel and aluminum, so they handle highway and ramp loading. I will not use a generic chassis design for the specialized hydraulic boat trailer, as that would compromise the unique lifting and width adjustment requirements. What is the maximum allowable height for the hydraulic lifting trailer when its boat rests are fully retracted? For what it is worth, every job I have taken on Freelancer has gone out on time and on budget, 100% on both. I need your approval on the initial concept sketches for the hydraulic trailer before I begin detailed AutoCAD work.
$1,125 USD in 21 days
3.4
3.4

Hi, Aashiq here from Cape Town, South Africa. This project instantly caught my eye, so I had to reach out. I see you’re looking for detailed structural designs for trailers, especially a heavy hydraulic lifting trailer that can adjust its width and support boats with various hydraulic rests. That’s an exciting challenge! I specialize in creating comprehensive structural designs that help clients meet their specific needs. I’ve worked on similar projects before, focusing on efficient fabrication drawings and robust engineering reports. I’d love to share samples of my past work that demonstrate my ability to deliver precisely what you’re looking for. Based on what you mentioned, here is how we would approach the project: - Develop detailed fabrication drawings with all necessary dimensions. - Create a thorough engineering report with all required calculations. - Provide connection detailing and a material call-out schedule. - Ensure native CAD files are supplied alongside PDF drawings. You can count on clear communication and a seamless solution that meets your performance standards. I’ll ensure that the designs are optimized for both safety and functionality. Best Regards, Aashiq
$1,350 USD in 14 days
0.0
0.0

WASILLA, United States
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Member since Nov 30, 2021
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