How to Build a DIY Welding Cart
A purpose-built welding cart keeps your welder, gas cylinder, cables, and consumables organized and mobile. A well-designed DIY cart can be built from angle iron for $50–100 in materials and serves as an excellent first welding project for anyone learning to weld structural steel.
What Materials Do You Need to Build a DIY Welding Cart?
Steel
- 1.5” x 1.5” x 1/8” angle iron - primary frame material (most common dimension)
- 1” x 1” x 1/8” angle iron - shelf supports and lighter structural members
- Expanded metal (1/4” flattened) - shelf decking (allows slag to fall through, good grip)
- 1/4” flat bar - gussets and reinforcing plates at corners
Quantity estimate for a basic 36” x 18” x 36” cart: ~30–40 linear feet of 1.5” angle iron, one 24” x 48” sheet of expanded metal
Steel source: Local steel supplier, metals recycler, or OnlineMetals.com (common among DIY builders). Old bed frames are a commonly used free source of angle iron.
Hardware
- 4 swivel casters - 4” or 5” diameter, 2 locking. Rated for the combined weight of the welder + cylinder (~200–400 lbs for typical MIG setup). Buy casters rated for at least 2x the expected load.
- Welding wire and consumables - for the project itself
- Paint / primer - Rust-Oleum Rusty Metal Primer + topcoat for outdoor carts
Standard Welding Cart Dimensions
For a typical 130–180A MIG welder (Lincoln 210MP, Miller 211, Hobart Handler 210MVP):
| Dimension | Typical Measurement |
|---|---|
| Overall height | 36” (comfortable working height) |
| Width | 16–18” |
| Depth (front to back) | 28–36” |
| Shelf spacing | 12–18” between shelves |
| Caster height | 4–5” |
Bottom shelf: Sized to fit the welder. Most MIG welders are 14–18” wide and 12–18” deep. Middle shelf: Ground cable storage, electrode storage, consumables box. Bottom-of-frame shelf: Gas cylinder location - chain holder or V-bracket to secure the cylinder upright.
Do I Need a Welder to Build a Welding Cart?
Yes - which makes this a bit of a chicken-and-egg situation for beginners. Solutions:
- Borrow or rent a welder for the cart build, then buy your own to store on it.
- Build with bolted construction - angle iron cart frames can be built with 1/4” bolts through the iron flanges instead of welding. Not as elegant but functional.
- Buy a simple commercial cart first (Eastwood B07TXFN6SR ~$100) then upgrade to a DIY cart once you have a welder and skills.
Step-by-Step Build Process
1. Design
Sketch or use free plans (search “free welding cart plans” at YouTube or weldingtipsandtricks.com). Measure your welder and any cylinder dimensions first.
2. Cut all pieces
- Use an angle grinder with a 4.5” cut-off wheel or a metal chop saw
- Mark all pieces with a soapstone marker
- Cut mitered corners at 45° for the frame rectangles (cleaner than butt joints)
3. Square the frame
- Use a flat welding table or flat concrete floor
- Use welding magnets (Hobart B0017YYHDE) to hold corners at 90°
- Tack weld only all joints first before full welding - this allows correction if squareness is off
4. Check square and weld out
- Measure diagonals - equal diagonals = square frame
- Full weld all joints
- Allow to cool before moving
5. Add shelves
- Cut expanded metal to fit shelf openings
- Weld or bolt to shelf supports
6. Mount casters
- Drill 4 holes per caster mount through the bottom frame corners
- Bolt through with 5/16” or 3/8” bolts + locking nuts
7. Add cylinder holder
- Weld a chain hook or V-bracket to the rear upright
- Chain should wrap around cylinder at shoulder height
8. Grind, prime, paint
- Grind any rough welds and sharp corners with a flap disc
- Apply Rust-Oleum Rusty Metal Primer
- Topcoat in shop color of choice
Eastwood Welding Cart (Buy vs. Build Decision)
Eastwood Welding Cart - ASIN B07TXFN6SR (~$90–130) amazon.com/dp/B07TXFN6SR
Buy when:
- You don’t yet have welding skills to build confidently
- Shop setup needs to happen immediately
- Materials in your area cost more than the commercial option
Build when:
- You want a first structural steel project
- You need custom dimensions (larger footprint, different shelf heights)
- Budget for materials is available (~$50–100 in steel + casters)
FAQs
What materials do you need to build a DIY welding cart? 1.5” angle iron for the frame, expanded metal for shelves, 4 swivel casters (2 locking), and flat bar for gussets. Old bed frames are a commonly used free source of angle iron.
What are the standard dimensions for a welding cart? Approximately 36” tall x 18” wide x 28–36” deep for a typical MIG welder setup. Bottom shelf sized to the welder; middle shelf for consumables; cylinder mount at the rear.
Do I need a welder to build a welding cart? Yes for a welded cart. Beginners can bolt-together a functional cart with angle iron and hardware, or buy a commercial cart (Eastwood B07TXFN6SR) to start and build a DIY cart once skills develop.
