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Workshop · Garage

Welding Workshop Setup: Layout, Cart and Table

8 min read

A good welding workshop setup, in a garage or a shed, comes down to four things: a welding zone with nothing combustible in it, fume extraction at the source, a power supply that matches your welder, and a gas cylinder standing upright and secured against falling over. The welding table, the cart and the cupboards go in around that zone.

Layout and zones

Split the garage into zones before you buy anything else. Four work best:

  • welding – the table, the cart with the welder and cylinder, fume extraction, clear floor around it,
  • cutting and grinding – saw, angle grinder, vice; sparks fly here too,
  • stock – box section, sheet and offcuts, ideally on a rack against a wall,
  • combustibles – paint, thinners, rags, as far as possible from both spark zones.

How much space a welding workstation needs, and what a workshop must have, is set by fire, building and workplace rules that depend on your country, so check the local rules that apply to you. The practical point is the same everywhere: the smaller or lower your garage, the more important extraction at the source becomes.

One welder manufacturer’s safety instructions put it plainly: remove flammable and explosive materials from the welding area and keep fire-fighting equipment at hand. In a garage, that also means a clear path to the doors, and it is best to move the car out before you weld, because it is combustible too and sits in the spark zone.

The arc hurts unprotected eyes, and the same manufacturer’s instructions warn about reflected arc flash as well. If you weld with the garage door open, or someone may walk in, screen off the welding area with a welding curtain or screen.

Ventilation and fume extraction

Welding fume is fine particles of metal oxides plus gases. The International Agency for Research on Cancer (IARC) classifies welding fumes as carcinogenic to humans (Group 1), and dusts and fumes of nickel, chromium, cadmium and beryllium are carcinogenic. Welding galvanised steel produces zinc oxide, which can cause metal fume fever.

The highest concentrations are right next to the workpiece, which is why the Polish Central Institute for Labour Protection (CIOP-PIB) says the most effective approach is to remove the fume where it forms. In a garage that means local exhaust ventilation, a hood or an extraction arm placed by the arc, backed up by general ventilation that brings in fresh air. Just opening the door dilutes the fume across the whole garage, but it does not capture it at the source, where the concentration is highest.

Mind the conflict: with MIG/MAG and TIG, the shielding gas only works if the wind does not blow it away. A strong draught across the arc spoils the shield and gives a porous weld, so bring in fresh air in a way that does not blow straight onto the weld pool.

Argon and CO2 are heavier than air and collect low down if there is a leak. If the garage has an inspection pit, keep cylinders away from it, and air the garage before you climb into the pit after a long welding session.

Fire safety

Sparks and spatter travel further than you expect, and the same manufacturer adds a warning worth remembering: a fire can break out from sparks even several hours after welding has finished. Three habits cover most of the risk:

  1. Protect combustibles at the workstation and around it, including the building itself. Cover wooden walls, insulation and cables, or move the workstation away from them.
  2. Keep a fire extinguisher at hand, where you can reach it from the welding zone, and ask your fire safety supplier which type suits the materials in your workshop.
  3. Check after you finish – the welding spot and everything around it, because smouldering wood or a rag often catches fire later.

Keep flammable liquids to a minimum and out of the welding zone. How much you may store in a garage depends on local fire rules. The flash point of a product is in its safety data sheet.

Welding table: height, top, holes

The welding table is the fixed base of the workshop. It holds parts flat and at the right angle, lets you clamp them before the heat starts pulling them out of shape, and takes the earth clamp.

A typical working height for welding tables is 850–950 mm (about 33.5–37.5 in); that is what one of the leading manufacturers gives, for example. By its rule, for flat parts the top should be about 10–15 cm (4–6 in) below your elbow, lower for tall assemblies, and 700–750 mm (27.5–29.5 in) for precise work sitting down. Choose the size by another rule: the largest part plus 200–300 mm (8–12 in) on each side for clamps and stops.

System tables have tops with holes in a fixed grid. Example figures for three systems from one manufacturer:

System Holes Grid Top thickness Use
16 Ø 16 mm 50 × 50 mm 11.5–13 mm light and medium work, precision fixtures
22 Ø 22 mm 100 × 100 mm or diagonal 17–19 mm general fabrication
28 Ø 28 mm 100 × 100 mm or diagonal 24.5–27 mm heavy steel structures

If you are just starting out, you do not need a system table straight away. Many structures, including tab-and-slot kits, can be tacked on an ordinary flat, non-combustible top or on the floor. Building a DIY welding table is a good early project in its own right, as we explain in our guide to beginner welding projects.

The cart as a mobile station

The table stays put, but the welder and the cylinder should follow the work. A welding cart holds the welder at a comfortable height, keeps the cylinder upright and secured, and keeps the leads, torch and electrodes in one place. Hang the torch on a holder within reach rather than leaving it on the bench or on the welder. Collect electrode stubs in a separate metal container.

Our welding cart S is a weld-it-yourself kit for a welder of up to 30 kg (66 lb), standing on two 545 mm rails, and one 20 l or 8/10 l cylinder, with three drawers. Instead of the solid side panels you can choose a system tool wall with a grid for M5 mushroom-head fasteners; accessories for it are in development. Without a cylinder the cart is light at the back: fit the cylinder first and then the welder, pull the empty cart smoothly and do not pull the drawers out on a slope. How to match a cart to your welder and cylinder is covered in our guide on how to choose a welding cart.

Cylinder storage

Gas suppliers’ safety data sheets say a cylinder is stored upright, valve at the top, secured against falling over, in a well-ventilated place, below 50 °C (122 °F), away from sources of heat and ignition, and not together with flammable materials. So keep it away from the grinding zone and from heaters, with nothing combustible beside it. Close the valve after every use. If a valve is hard to open, do not force it: stop using the cylinder and contact your gas supplier. Moving and securing cylinders is covered in detail in our guide on welding gas cylinder safety.

Lighting and power

In Europe, compact welders run on 230 V single-phase and more powerful ones on 400 V three-phase. The fuse your welder needs is given in its manual, so check your welder’s manual for the required fuse. For illustration, these are the figures from one manufacturer’s manuals:

Supply Example welder Fuse per the manual (example)
single-phase, 230 V compact MIG welder, 170–200 A 16 A slow-blow, type C
single-phase, 230 V TIG/MMA inverter, 170–200 A 16 A, type C
three-phase, 400 V DC TIG welder, about 300 A 16 A
three-phase, 400 V MMA/TIG power source, 400–500 A 25–35 A slow-blow

The same manufacturer says an extension lead should have at least the cross-section of the welder’s supply cable, typically 3 × 1.5 mm², recommends 3 × 2.5 mm², and allows a length of up to 100 m (330 ft). Its manual also says a new plug or mains cable should be fitted by an authorised electrician; the same goes for new wiring or a three-phase socket.

You need plenty of light, spread evenly: ceiling fittings for the whole garage and a movable lamp by the table.

Equipment checklist

Item What for What to look for
Welder welding 230 V or 400 V supply, fuse from the manual
Welding cart mobile station for welder and cylinder shelf load in kg, cylinder diameter in mm
Welding table base for setting up and clamping height 850–950 mm (33.5–37.5 in), non-combustible top
Fume extraction removing fume at the source hood or arm by the arc
Fire extinguisher first response to a fire within reach of the welding zone
Welding curtain or screen protecting others from the arc placed between the arc and the door
Helmet, gloves, clothing protecting the welder filter shade to suit the process and current (EN 169, auto-darkening EN 379), gloves to EN 12477, clothing to EN ISO 11611
Extension lead power further into the garage cross-section at least 1.5 mm², better 2.5 mm²

Questions

What height should a welding table be?

Typical welding tables have a working height of 850–950 mm (about 33.5–37.5 in); that is the range one of the leading manufacturers gives, for example. Its rule of thumb: for flat parts the top should sit about 10–15 cm (4–6 in) below your elbow, lower for tall assemblies, and 700–750 mm (27.5–29.5 in) works for precise work sitting down.

How thick should a welding table top be?

As an example, one manufacturer's system tables with Ø 16 mm holes have an 11.5–13 mm top, with Ø 22 mm holes 17–19 mm, and with Ø 28 mm holes for heavy fabrication 24.5–27 mm. If you build a table for your own use, remember that a thinner top distorts more easily from heat and clamping pressure.

What is a welding table for?

It gives you a flat, non-combustible base on which you set parts at the right angle and clamp them, so they do not move as the steel expands with heat and shrinks as it cools. A steel top also takes the earth clamp. On tables with a hole grid, parts are fixed in repeatable positions.

Can I plug a welder into an ordinary socket?

In Europe, a compact 230 V inverter can be, if the circuit has the protection its manual requires; the example manuals we checked call for a 16 A slow-blow (type C) fuse. One manual says an extension lead should have at least the same cross-section as the welder's own supply cable, for example 3 × 1.5 mm², and recommends 3 × 2.5 mm². Have a qualified electrician change the plug or the wiring.

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