Build a Mobile Welding Cart with a Fire-Resistant Welding Curtain Enclosure

Welding in a shared shop space means dealing with two problems a dedicated welding bay solves automatically: your welder, consumables, and PPE need to live somewhere between sessions, and the arc flash, spatter, and UV radiation from welding need to stay contained away from whatever else is going on nearby — a CNC router, a 3D printer, or just foot traffic that shouldn't be exposed to an unshielded arc. A mobile welding cart with a fold-out or roll-around fire-resistant curtain enclosure solves both at once: a dedicated, organized home for the welder that becomes a contained welding station on demand and rolls out of the way the rest of the time.

What You're Building

This is a welded steel-frame cart (appropriately enough) sized to carry your welder, a gas cylinder in a secured upright position, consumables storage, and a retractable or panel-mounted welding curtain system on at least two sides, creating a partial enclosure around the actual welding zone when deployed. It's explicitly not a fully enclosed welding booth — it's a mobile wind/spatter/flash barrier sized for occasional welding in a multi-use shop, not a dedicated fabrication bay.

Difficulty, Time, and Tools

This is an advanced welding and fabrication project — you need existing welding capability to build it, which is a bit of a chicken-and-egg problem if you don't already have access to a welder; borrowing shop time or building the cart itself as your first serious welding project under supervision are both reasonable paths in. Budget two full weekends: one for the cart frame and casters, one for the curtain frame, consumable storage, and finish work.

Build Steps

1. Design the base frame around your specific welder's footprint and weight, plus a secured, upright cylinder mount with a chain or strap restraint — cylinder tip-over is one of the most common and preventable shop injuries, and a cart design that doesn't positively restrain the cylinder isn't finished.
2. Weld the base frame from square or rectangular steel tubing, sized for the actual combined weight of welder plus a full gas cylinder plus consumables — undersized tubing on a cart carrying 150+ lbs of welder and cylinder will flex and eventually fatigue at the joints.
3. Mount heavy-duty locking casters rated well above the cart's loaded weight — at least two of the four should lock, and all four should be rated for the floor surface you'll actually roll it across (polyurethane tread holds up far better than hard rubber on concrete over years of use).
4. Build the curtain frame as a hinged or telescoping extension off two sides of the cart, sized to hang welding curtain panels low enough to actually block spatter and arc flash at floor level, not just at eye height.
5. Hang welding curtain or welding screen panels (rated specifically for arc flash and UV blocking — this is a different material than a general shop curtain or tarp) on the frame, with enough overlap at panel seams that there's no direct line-of-sight gap to the arc from outside the enclosure.
6. Add consumable storage (electrode/wire storage, a drawer or bin for gloves, tip/nozzle spares, and a fire extinguisher mount) sized into the cart structure rather than bolted on as an afterthought — a fire extinguisher mounted directly on the cart means it's always exactly where the ignition risk is.
7. Finish with a coat of heat-resistant paint on any surface near the welding zone, and confirm every curtain panel clears moving parts (casters, drawer slides) when the cart is rolled with the curtain frame deployed.

Parts List

• - [Square steel tubing 1.5in for cart frame](https://www.amazon.com/s?k=1.5%20inch%20square%20steel%20tubing%20welding%20frame&tag=42308b-20)
• - [Heavy duty locking casters 4in set of 4](https://www.amazon.com/s?k=heavy%20duty%20locking%20casters%204%20inch%20set%20of%204&tag=42308b-20)
• - [Welding curtain fire resistant panels](https://www.amazon.com/s?k=welding%20curtain%20fire%20resistant%20panels&tag=42308b-20)
• - [Welding screen frame hardware hinges](https://www.amazon.com/s?k=welding%20screen%20frame%20hinge%20hardware&tag=42308b-20)
• - [Gas cylinder security chain strap](https://www.amazon.com/s?k=gas%20cylinder%20security%20chain%20strap%20mount&tag=42308b-20)
• - [Fire extinguisher ABC with mounting bracket](https://www.amazon.com/s?k=fire%20extinguisher%20ABC%20with%20mounting%20bracket&tag=42308b-20)
• - [Heat resistant high temp spray paint](https://www.amazon.com/s?k=heat%20resistant%20high%20temp%20spray%20paint%20black&tag=42308b-20)
• - [Welding gloves and consumable storage bin](https://www.amazon.com/s?k=welding%20glove%20and%20consumable%20storage%20bin&tag=42308b-20)
• - [MIG welder wire spool holder bracket](https://www.amazon.com/s?k=mig%20welder%20wire%20spool%20holder%20bracket&tag=42308b-20)

Safety Notes

Welding curtains and screens must be rated specifically for the purpose — ordinary tarps, shop curtains, or plastic sheeting are flammable and will not block UV radiation, and using them in place of a rated welding curtain is a serious fire and eye-injury hazard. The enclosure this cart creates reduces arc flash exposure to bystanders and reduces spatter travel, but it does not replace your own PPE — welding helmet, gloves, and flame-resistant clothing are still required for the welder regardless of curtain coverage. Secure the gas cylinder with a positive restraint at all times, including while the cart is parked and not in use; an unsecured cylinder that tips and shears its valve becomes a dangerous projectile. Keep the mounted fire extinguisher rated for the materials actually present (class ABC covers most combustibles and is the standard baseline for a welding area) and verify it's inspected and charged before relying on it. Finally, never weld near this cart's own curtain fabric closer than the fabric's rated standoff distance — even fire-resistant welding curtains can be damaged by sustained direct arc exposure at close range.

A welding cart with its own containment solves the actual problem of welding occasionally in a space you share with other machines and other people: it keeps your gear organized, keeps the arc's hazards contained to a defined zone, and rolls out of the way completely when you're done. It's more fabrication effort than buying a standalone welding screen and a shelf, but it's also the version that never gets left in the wrong spot because it's inconvenient to set up.