Adding Sides To Utility Trailer – Boost Your Hauling Capacity
Adding sides to a utility trailer significantly increases its cargo capacity and prevents loose items from falling out during transport.
This DIY project can be accomplished using wood or metal, typically involving bolting or welding new frames and panels to the existing trailer chassis, tailored to your specific hauling needs.
Ever felt frustrated when your utility trailer just isn’t big enough, or when loose brush and gear threaten to spill out on the highway? You’re not alone. Many DIYers and homeowners quickly realize the limitations of a standard flatbed trailer when tackling bigger projects or hauling specific types of cargo. It’s a common hurdle, but one with a straightforward, rewarding solution.
Imagine confidently hauling a full load of firewood, construction debris, or camping essentials without a single worry. Adding sides to a utility trailer transforms it from a simple flatbed into a versatile workhorse, ready for almost anything you throw at it – or rather, into it. This upgrade isn’t just about capacity; it’s about safety, efficiency, and getting more out of your investment.
This guide will walk you through everything you need to know, from planning and material selection to the step-by-step process of securely attaching new sides. Whether you prefer working with wood or metal, we’ll cover the techniques, tools, and crucial safety tips to ensure your project is a success. Let’s get that trailer ready for its next big adventure!
Why Upgrade Your Trailer: The Benefits of Adding Sides
Transforming your basic utility trailer by adding sides opens up a world of possibilities. This isn’t just a cosmetic change; it’s a significant functional upgrade that pays dividends in convenience and capability. For anyone who regularly uses their trailer, the advantages are clear and immediate.
The primary benefit is a dramatic increase in your trailer’s cargo volume. Flatbeds are great for large, stable items, but they struggle with anything loose or bulky that needs containment.
Adding sides means you can pile on brush, mulch, gravel, firewood, or even securely transport taller furniture without constant worry of it shifting or falling off.
Beyond volume, containment is key. Sides act as a protective barrier, keeping your load securely within the trailer’s confines, even on bumpy roads or during sudden stops.
This drastically reduces the risk of losing cargo, which is not only frustrating but can also be a significant road hazard for other drivers.
Enhanced versatility is another major plus. A trailer with sides can handle a wider array of jobs, from moving house to hauling camping gear for an extended trip.
You can even integrate tie-down points onto the new sides for extra security, further expanding its utility for specific loads like ATVs or dirt bikes.
Finally, a well-executed side addition also adds a touch of professionalism and longevity to your trailer. It protects your cargo, protects your investment, and ultimately makes your hauling tasks much easier and safer.
Choosing Your Materials: Wood vs. Metal for Trailer Sides
The first big decision when considering adding sides to utility trailer is what material to use. Both wood and metal offer distinct advantages and disadvantages, and the best choice depends on your budget, tools, skills, and the primary use of your upgraded trailer.
Working with Wood: Practical and Accessible
Wood is often the go-to choice for DIYers because it’s relatively inexpensive, easy to work with, and requires common woodworking tools.
Pressure-treated lumber is highly recommended for its resistance to rot and insects, ensuring your sides last longer against the elements.
Plywood, particularly exterior-grade or marine-grade, can be used for solid panels, while dimensional lumber (like 2x4s or 2x6s) forms a sturdy frame.
The downside to wood is its weight and susceptibility to wear and tear over time, even with treatment and paint.
It can also splinter or rot if not properly maintained, especially in harsh weather conditions.
Metal Construction: Durable and Robust
Metal sides, typically made from steel tubing, angle iron, or expanded metal, offer superior strength and durability.
They can withstand heavy loads and abuse, making them ideal for contractors or those hauling dense materials like scrap metal or rocks.
While metal requires more specialized tools like a welder, grinder, and metal cutting saw, the result is a virtually maintenance-free and incredibly robust addition.
Expanded metal is a great choice for sides if you need visibility into the trailer or want to reduce weight while maintaining strength.
The main drawbacks are the higher initial cost of materials and the necessity of welding skills, which not every DIYer possesses.
However, if you have access to welding equipment or know someone who does, metal sides can be a fantastic long-term solution.
Planning Your Project for Adding Sides to Utility Trailer
Careful planning is the bedrock of any successful DIY project, and adding sides to utility trailer is no exception. Taking the time to measure, sketch, and envision the final product will save you headaches and costly mistakes down the line.
Measure Twice, Cut Once: Essential Dimensions
Start by meticulously measuring your existing trailer bed. You’ll need the length and width of the bed, as well as the height of any existing stake pockets or frame rails you plan to utilize.
Decide on the desired height for your new sides. Consider what you’ll primarily be hauling. Taller sides are great for brush, but might obstruct rear visibility or make loading difficult for some items.
Sketch out your design. This doesn’t need to be an engineering drawing, just a clear visual representation of how the sides will attach and what they will look like.
Think about whether you want fixed sides, removable sides, or even a tailgate that can be opened or removed.
Tools and Materials Checklist
Gathering all your tools and materials before you start is crucial. For wood sides, you’ll need:
- Pressure-treated lumber (e.g., 2x4s, 2x6s)
- Exterior-grade plywood (if using solid panels)
- Tape measure, pencil, speed square
- Circular saw or miter saw
- Drill and appropriate bits
- Carriage bolts, fender washers, lock nuts (stainless steel recommended)
- Wood screws (exterior grade)
- Wood glue (exterior grade)
- Clamps
- Safety glasses, hearing protection, gloves
- Primer and exterior paint/stain (for longevity)
For metal sides, your list will look a bit different:
- Steel tubing (e.g., 1.5″ or 2″ square tube) or angle iron
- Expanded metal or sheet metal (if using solid panels)
- Welder (MIG or stick) and consumables
- Grinder with cutting and grinding wheels
- Metal cutting saw (chop saw or band saw)
- Drill and metal-specific bits
- C-clamps, welding clamps
- Welding helmet, welding gloves, leather apron, fire extinguisher
- Bolts, nuts, washers (if bolting to frame)
- Primer and metal paint (rust-inhibiting)
Don’t forget general workshop items like saw horses, a level, and a chalk line for accurate marking.
Considering Legal and Safety Requirements
Before you begin, check local regulations regarding trailer dimensions and load visibility. Some areas have limits on trailer height or require specific lighting if your new sides obstruct existing lights.
Always prioritize safety. Wear appropriate personal protective equipment (PPE) for every step of the process.
Ensure your trailer’s existing frame can handle the added weight and stress of the new sides and the heavier loads they’ll enable.
If your trailer is old or rusty, inspect the frame thoroughly for any weak points that might need reinforcement before proceeding.
Step-by-Step Guide: Attaching Wood Sides to Your Trailer
Building and attaching wooden sides is a popular choice for its relative simplicity and cost-effectiveness. Follow these steps for a sturdy and functional upgrade.
Step 1: Build the Side Panels
Start by cutting your vertical posts and horizontal rails to the desired dimensions. For a typical side, you’ll have two end posts and several horizontal rails.
Assemble each side panel individually on a flat, stable surface. Use strong exterior-grade wood glue and screws to create robust joints. Pocket screws are excellent for this application.
If you’re using plywood panels, cut them to size and attach them to your wooden frame using screws and glue, ensuring they are flush and square.
For a slatted look, space your horizontal boards evenly and secure them to the vertical posts.
Step 2: Preparing the Trailer Frame
Clean the areas where the new sides will attach. Remove any rust, dirt, or loose paint to ensure a good connection.
Identify existing stake pockets or bolt-on points on your trailer frame. These are your primary attachment points.
If your trailer doesn’t have suitable attachment points, you may need to drill new holes through the main frame rails. Use a metal-specific drill bit and go slowly, using cutting oil to preserve the bit.
Ensure all drilled holes are deburred to prevent stress concentrations and potential cracking.
Step 3: Attaching the Sides Securely
With help, position one side panel onto the trailer frame. Use clamps to hold it firmly in place.
Align the pre-drilled holes in your wooden sides with the attachment points on the trailer frame.
Insert carriage bolts through the frame and the wood from the outside, securing them with fender washers and lock nuts on the inside.
Tighten all bolts firmly, but be careful not to overtighten and crush the wood. Repeat this process for all sides.
For added stability, especially if you’re not using stake pockets, you can add metal brackets or angle iron to connect the wooden sides directly to the trailer’s bed or frame.
Step 4: Finishing Touches and Protection
Once all sides are securely attached, inspect all connections for tightness and stability.
Sand any rough edges or splinters on the wood to prevent injuries.
Apply a good quality exterior primer, followed by several coats of exterior-grade paint or stain. This is crucial for protecting the wood from moisture and UV damage, significantly extending its lifespan.
Consider adding D-rings or other tie-down points to the top rails of your new sides for even greater load security.
Advanced Techniques: Welding Metal Sides to Your Trailer
For those with welding experience, fabricating metal sides offers unmatched durability and a sleek, professional finish. This approach is more involved but yields a virtually indestructible result.
Step 1: Fabricating the Metal Frame
Cut your steel tubing or angle iron to create the upright posts and horizontal rails for each side panel. Accuracy is key here for square, strong welds.
Lay out your cut pieces on a flat, fire-resistant surface. Use magnets or clamps to hold them in position.
Tack weld the frame components together, then check for squareness and alignment before fully welding all joints.
For solid sides, cut expanded metal or sheet metal to fit within your frame and weld it securely. For an open design, simply weld the frame and add a top rail.
Step 2: Preparing the Trailer for Welding
Thoroughly clean the areas on your trailer frame where the new sides will be welded. Grind off any paint, rust, or contaminants down to bare metal.
Disconnect your trailer’s battery if you plan to weld directly to the main chassis to prevent damage to electrical components.
Ensure you have a good ground connection for your welder to the trailer frame.
Always have a fire extinguisher nearby and be aware of your surroundings, as sparks can travel.
Step 3: Welding the Sides in Place
Carefully position one fabricated side panel onto the trailer frame. Use strong clamps to hold it firmly and ensure it’s plumb and level.
Start with several strong tack welds to secure the panel to the trailer frame.
Step back and inspect the positioning before proceeding with full welds. Adjust if necessary.
Once satisfied, fully weld all attachment points. Use consistent, strong beads, ensuring good penetration without burning through the thinner trailer frame metal.
Allow welds to cool naturally. Grind down any sharp edges or excessive weld spatter for a clean finish.
Step 4: Finishing and Rust Protection
After all welding is complete and cooled, grind smooth any rough welds or sharp corners.
Clean the entire metal surface of the new sides and the welded areas thoroughly to remove all grinding dust and contaminants.
Apply a high-quality rust-inhibiting primer specifically designed for metal. This is critical to prevent corrosion.
Follow with several coats of durable exterior metal paint, matching your trailer’s color if desired, for maximum protection and a professional look.
Common Mistakes to Avoid and Troubleshooting Tips
Even experienced DIYers can encounter hiccups. Knowing what pitfalls to avoid and how to troubleshoot common issues can save you time and frustration when adding sides to utility trailer.
Overlooking Trailer Capacity and Balance
Mistake: Adding heavy sides and then overloading the trailer beyond its gross vehicle weight rating (GVWR) or tongue weight limits. Tip: Always know your trailer’s GVWR. Choose lighter materials if you frequently haul near the limit. Distribute your load evenly to maintain proper tongue weight (typically 10-15% of the total loaded trailer weight).
Poor Attachment and Weak Connections
Mistake: Using too few bolts, small screws, or weak welds, leading to sides detaching or flexing under load. Tip: Use heavy-duty hardware. For wood, carriage bolts with large washers are superior to screws for structural connections. For metal, ensure full, strong welds with good penetration. Don’t skimp on attachment points; more is better for stability.
Ignoring Rust and Weather Protection
Mistake: Not properly priming and painting wood or metal, leading to premature rot or severe rust. Tip: Pressure-treated wood still needs sealing and painting. Metal must be primed with a rust-inhibiting primer before painting. Pay extra attention to cut edges and weld seams where rust often starts.
Inaccurate Measurements
Mistake: “Eyeballing” cuts or measurements, resulting in crooked sides or gaps. Tip: Measure three times, cut once. Use a good tape measure, a speed square, and a level. Don’t be afraid to double-check your angles and lengths before making a permanent cut or weld.
Troubleshooting Wobbly Sides
If your new sides feel wobbly after installation, inspect all attachment points. Are bolts tight? Are welds solid?
Consider adding diagonal bracing, especially at the corners, for extra rigidity. This is often necessary for taller sides.
You can also add a horizontal cross-member connecting the top rails of opposing sides, which significantly stiffens the entire structure.
Maintaining Your Upgraded Utility Trailer
Once you’ve successfully completed adding sides to utility trailer, a little ongoing maintenance will ensure your hard work lasts for years to come.
Regular Inspections
After each heavy haul or periodically, inspect all bolts and welds. Tighten any loose bolts and check for cracks in welds, especially after driving on rough terrain.
Look for signs of rust on metal components or rot/splintering on wood. Address these issues promptly before they worsen.
Cleaning and Protection
Keep your trailer sides clean. Wash off dirt, mud, and corrosive materials like road salt as soon as possible.
For wooden sides, reapply paint or stain every few years, or as needed, especially if you notice fading or wear.
For metal sides, touch up any chipped paint or areas where rust might be starting to form. A quick sanding and repaint can prevent major corrosion.
Lubrication and Hardware Checks
If you included hinges for a drop-down tailgate, lubricate them regularly to ensure smooth operation.
Check all latches, chains, and tie-down points for wear or damage. Replace any compromised hardware immediately.
Proper maintenance not only extends the life of your trailer but also ensures it remains safe and reliable for all your hauling needs.
Frequently Asked Questions About Adding Sides to Utility Trailer
You’ve got questions, we’ve got answers. Here are some common inquiries DIYers have when considering this useful upgrade.
Can I make the sides removable?
Absolutely! For wooden sides, you can design them to drop into existing stake pockets or create custom metal brackets that allow the sides to lift out. For metal sides, welding receiver tubes to the trailer frame and fabricating posts that slide into them works well. This offers maximum versatility, letting you switch between a flatbed and a contained trailer.
How tall should I make the new sides?
The ideal height depends on your primary use. For hauling brush or firewood, 24-36 inches is common. For general use, 12-18 inches is often sufficient to contain most loads without significantly impacting visibility or making loading difficult. Always ensure your new sides do not obscure your trailer’s taillights or license plate.
Do I need to reinforce my trailer’s frame?
It depends on the existing trailer and the weight you plan to add. Most modern utility trailers have robust frames, but if you’re adding very tall, heavy sides and plan to haul extremely dense materials, it’s wise to inspect the frame for any weak points. If you have an older or lighter-duty trailer, adding some angle iron or box tubing bracing along the main frame rails underneath the new sides can provide extra peace of mind.
What about a tailgate?
Adding a functional tailgate is a highly recommended upgrade. You can hinge it at the bottom to fold down, creating a ramp, or hinge it at the top for easier dumping. Removable tailgates are also an option. Ensure any tailgate design is strong enough for its intended use and has secure latches to prevent accidental opening during transit.
Is welding or bolting better for attaching sides?
Both methods are effective. Welding offers superior strength and a permanent attachment, ideal for heavy-duty use and if you have the skills and equipment. Bolting is more accessible for most DIYers, allows for removable sides, and requires less specialized tools. For bolting, ensure you use appropriately sized, high-grade hardware and plenty of attachment points.
Ready to Roll?
Adding sides to utility trailer is more than just a project; it’s an investment in your trailer’s capability and your own peace of mind. Whether you choose the accessible path of wood or the robust durability of metal, the transformation will make your hauling tasks significantly easier and safer. You’ll be able to tackle bigger projects, move more materials, and transport your gear with confidence, knowing everything is securely contained.
Remember, patience and preparation are your best tools. Double-check your measurements, prioritize safety with proper PPE, and don’t hesitate to ask for help when lifting heavy components. The satisfaction of seeing your upgraded, custom-built trailer ready for action is truly rewarding. So grab your tools, plan your build, and get ready to unlock the full potential of your utility trailer. Happy hauling!
