3G Stick Welding: The Complete Guide to Vertical-Up SMAW

Every welder remembers their first vertical plate test: the rod is burning in your fingers, the puddle keeps trying to sag down the bevel, and the inspector is watching from six feet away. That single coupon decides whether you leave the shop certified or go back to padding beads for another week.

What 3G Stick Welding Actually Means

Simply put, 3G stick welding is the vertical groove weld test position for plate that is performed with Shielded Metal Arc Welding (SMAW), more commonly known as stick welding. The number “3” indicates that the weld is being made in the vertical position, while the letter “G” stands for groove. This “G” is incredibly important, as it distinguishes a groove joint from a fillet joint. For example, a vertical fillet weld would be designated as 3F, whereas the beveled, open-root groove joint that is used for certification is designated as 3G.

To understand where 3G fits in, it’s best to look at all four of the plate groove test positions recognized by AWS and ASME terminology. These positions are strictly based off of the orientation of the plate and the direction that the weld is deposited:

• 1G (Flat): The plate lies horizontally, with the groove facing up. The welder deposits the weld from above.
• 2G (Horizontal): The plate is vertical, however the groove itself is horizontal. The weld is made across this horizontal joint.
• 3G (Vertical): The plate is vertical, with the groove oriented vertically. This is the position being tested, most often by welding in the vertical-up progression.
• 4G (Overhead): The plate is horizontal and positioned above the welder, with the weld being deposited from underneath it.

This order isn’t arbitrary, as each position becomes progressively more difficult to control due to gravity pulling the molten puddle away from the joint. With vertical and overhead joints specifically, puddle control becomes one of the largest obstacles a welder will face. For this reason, many fabricators place a large emphasis on mastering vertical work, often starting by learning which consumables pair well with these positions through resources such as an all-position welding rod guide to have the right tools for the job.

While these designations are standard throughout North America, they’re not the only ones used across the globe. According to ISO 6947, the same vertical groove positions are referred to by a different set of letters. The vertical-up progression is designated as PF, whilst the vertical-down progression is designated as PG. For the vast majority of structural 3G tests, the uphill weld will map directly to PF. Additionally, ISO 6947 does allow for slight leniency for test coupons, permitting ±5° slope and ±10° rotation of the test piece without it being reclassified to another position.

These certifications hold a lot of weight in production as well. As noted by GoWelding, a 3G qualification under AWS D1.1 will typically cover 1G, 2G, and 3G groove welds, in addition to 1F, 2F, and 3F fillet welds. However, it does not qualify a welder for 4G overhead groove welds. This range of coverage is one of the reasons that the 3G test is so sought after, as passing it can greatly expand a welder’s employability on structural steel jobs without having to test every position separately.

At the end of the day, 3G isn’t just a line on a wallet card. It’s a standardized measure of a welder’s ability to fight gravity, maintain a stable puddle, and achieve full root fusion in the vertical position with SMAW. With that foundation understood, the rest of the skills are built off of learning how to apply them correctly and consistently to real code work.

Why Codes Insist on Vertical-Up for Plate Groove Welds

Ask ten welders why they run uphill and you will hear some version of “gravity pulls the puddle down.” That is true, but it is not the reason the codes care. The real logic is metallurgical and structural: on thick plate, uphill progression gives deeper penetration and far more reliable root fusion, and the codes treat that difference seriously enough to write it into the rules as a controlled variable.

Direction of Travel Is an Essential Variable

Under the AWS D1.1 Structural Welding Code, direction of vertical progression is an essential variable for both the welding procedure specification (WPS) and welder performance qualification. In plain terms, if your procedure says vertical-up and you run vertical-down, you are no longer welding under that procedure, and any welder who qualified uphill has to requalify to weld downhill. The same clause sets upward progression as the default for all passes in the vertical position. D1.1 does leave a narrow allowance for vertical-down, but it is limited to repairing undercut on the cover pass, and only when the specified preheat is met. It is a repair allowance, not a second production option.

Why so strict? Vertical-down moves fast, and fast travel on thick beveled plate means the arc is outrunning the sidewall. The result is shallow penetration, cold lap at the root face, and undercut that no inspector will pass. Vertical-up lets the welder build a small solidified shelf on the previous bead, keep the arc pointed into the joint, and drive the fusion line deeper into both sidewalls and the backing bar. On the root pass especially, that extra penetration is what determines whether a coupon passes visual and bend inspection. As a practical reference, vertical stick welding technique guidance consistently emphasizes the same point: the uphill puddle sits on a ledge of already-frozen metal, which is what makes fusion possible at all.

What a 3G Test Qualifies (and What It Doesn’t)

A 3G qualification is a groove weld test position for plate. Passing it certifies that welder, with those processes and those essential variables, to run vertical groove welds within the thickness range and conditions listed on the performance qualification record. It does not qualify fillet work in the same position (that is 3F), it does not qualify overhead plate groove welds (that is 4G), and it does not qualify pipe in the 5G or 6G positions. It also does not carry across processes: a stick qualification does not automatically cover FCAW or GMAW, since each process has its own essential variables. For an overview of the coupon itself, the 3G SMAW certification breakdown walks through thickness ranges and what the certificate actually states.

Bridge Work: D1.5 Raises the Bar

The bridge code is stricter again. South Dakota DOT’s standard specifications, for example, require welders certified in test position 3G (vertical) for unlimited-thickness groove welds under the AWS D1.5 Bridge Welding Code framework, and the qualification must be performed under the supervision of an AWS Certified Welding Inspector acting in accordance with AWS QC1. You can review the requirement directly in South Dakota DOT Chapter 10, Welding. The supervision requirement matters: a self-run coupon with no certified inspector watching is not a qualification, it is practice.

Test Position vs. Production Reality

Codes deliberately separate the two. Your certificate proves you can execute a controlled groove on a prepared coupon in a fixed position. In production, you may run vertical seams on pipe supports, heavy base plates, and built-up girders where fit-up is imperfect, where you must restart three times, and where the ground clamp has moved. The code assumes that if you can make a sound uphill groove on the test plate, you have the puddle control to handle those variations, which is why procedures are written around direction rather than around individual beads.

That is also why the qualification is process-specific and consumable-family-specific. An electrode change can pull the welder back into requalification, which is why shops track rod classifications as carefully as amps. If you work across multiple filler types, it pays to understand how alloy classification works before assuming a rod swap is neutral; our guide to alloy steel welding electrodes covers selection, storage, and safety for exactly that situation.

The takeaway is simple: vertical-up is not a style preference passed down from old-timers. It is the code default because it produces the penetration and root fusion that structural and bridge work demand, and the direction you travel is treated with the same seriousness as your amps, your rod, and your heat input. Master it on the coupon, and the production welds follow.

Equipment and Electrode Setup for 3G Stick Welding

Technique gets all the glory in vertical welding, but most 3G failures actually start before the arc is struck. A rod run too hot, a ground clamp clipped to a painted frame, or a bag of damp 7018 will quietly undo weeks of puddle practice. Dial in the equipment first and the weld becomes far easier to control.

Polarity and machine settings

Almost every 3G plate procedure you will meet runs on DCEP (direct current electrode positive, also marked DCRP or “reverse”). DCEP drives more heat into the plate, giving the deep, pointed penetration a root pass needs and keeping the arc stable as the rod shortens. DCEN (electrode negative) is rarely used for structural groove work because it puts too much heat into the rod and too little into the joint.

Your machine needs three things: constant-current output so the amperage stays steady as arc length wanders, a hot-start feature for arc ignition, and an adjustable arc-force (often labeled “dig”) control. Any decent stick welder covers this; SMAW’s appeal is that a simple, portable power source still produces code-quality welds, as covered in Advantages of Stick Welding: Why SMAW Still Wins.

Electrode choice and sizing

Two families cover nearly all 3G work:

• E7018 (low hydrogen, iron powder, all-position) is the default for fill and cap passes on structural plate. It lays a smooth, forgiving bead that ties into the sidewalls and produces a face an inspector can accept.
• E6010 and E6011 (cellulose) burn aggressively and punch through mill scale and gaps, which makes them the usual choice for the root pass, especially when you need to wash the rod into a wide root opening. E6011 runs on AC or DCEP for shops without a DC-only machine.

Sizing follows plate thickness. For the standard 3/8 in (9.5 mm) test coupon, 1/8 in (3.2 mm) rods are the workhorse for root, fill and cap; drop to 3/32 in (2.5 mm) on thin plate or a tight root, and step up to 5/32 in (4.0 mm) only when you are filling a wide groove on thicker material and can control the extra puddle volume. If rod selection still feels confusing, our All Position Welding Rod Guide: Types, Uses & Tips breaks down the numbering system rod by rod.

Amperage: dialing back for vertical

Vertical-up needs less heat than flat because gravity already fights the puddle. A practical rule is to reduce flat-setting amperage by roughly 5 to 15 percent. WeldingTipsAndTricks recommends a 5 to 10 percent reduction for uphill work, noting that 130 A in flat becomes a comfortable starting point of about 117 A vertically. Consumable makers are slightly more conservative: Böhler lists 3.2 mm E7018 for vertical-up and overhead at 100 to 120 A, against 100 to 140 A in flat and horizontal.

Situation	3.2 mm E7018 setting
Flat / horizontal	100–140 A
Vertical-up starting point	100–115 A (10–15% below flat)
Vertical-up accepted range	100–120 A

Start at the low end. If the puddle will not wet out and the rod feels sluggish, add 5 A. If the puddle sags the moment you leave the arc, you are 10 A hot.

Low-hydrogen rod storage and baking

E7018 earns the “low hydrogen” label only if you protect it. Once the flux coating absorbs moisture, that hydrogen enters the weld and shows up later as porosity or, worse, hydrogen-induced cracking. Keep rods in a rod oven or heated quiver, hold them there between passes, and re-dry them per the manufacturer’s instructions. Typical re-baking is 300–350 °C (570–660 °F) for two hours. Opened packages should be used within the maker’s stated exposure window; when in doubt, bake them or open a fresh sealed pack for your test coupon.

Ground clamp placement and arc blow

Clip the ground directly to clean, bare metal on the work piece as close to the joint as practical, never to the table, fixture or a painted surface. As you climb the coupon, the current path crowds toward the remaining unburned metal and arc blow grows noticeably near the top, pushing the puddle sideways. Moving the clamp upward as you go, or welding the final inches slightly slower with a tighter arc, keeps the bead straight. The standard 3G SMAW test write-up also calls for the backing bar to be part of that circuit, so keep its contact face clean.

Set the machine, rods and ground once, verify them, then strike the arc. The setup you build before every coupon becomes the routine that carries you through the technique section that follows.

Vertical-Up Technique: Angles, Arc Length and Puddle Control

Setup gets you into the ballpark; technique decides the outcome: two angles, one arc length, and the discipline to keep the puddle doing what you want while it hangs in front of your face.

Work Angle and Travel Angle: The Two Numbers That Matter

In a vertical groove weld, the work angle keeps the bead centered. Hold the electrode so it roughly bisects the groove, aimed at the middle of the joint, and re-center as fill and cap layers change the bevel geometry. On a vertical fillet the rod stays close to perpendicular against the plate face.

The travel angle is the drag angle. Lean the rod back 5 to 15 degrees so it points down toward the weld already completed, then climb straight up: drag the puddle, do not push it. Too much lean dumps heat into the plate edges and shreds the toes; too little leaves the pool sitting on the previous bead without biting in. Those ranges match the vertical stick breakdown at Welding Tips and Tricks.

Arc Length: Roughly the Diameter of the Rod

Run an arc length about equal to the electrode diameter, roughly 3.2 mm for a 1/8 in rod, and keep it tighter vertical and overhead than in flat. A tight arc concentrates heat where you want fusion instead of spraying it sideways at the bevel edges.

A long arc gives a wide, sluggish, overheated puddle, heavy spatter, porosity, and undercut at both toes. It also burns rod faster than it deposits metal, so puddle volume drops and travel speed drifts. Our All Position Welding Rod Guide explains how E6010 and E7018 behave differently when the plate is in your face.

Build a Shelf, Don’t Fight Gravity

Vertical-up works because each increment of deposited metal freezes into a short ledge, a shelf, that supports the next increment. You are not holding molten steel against gravity with arc force; you are building a staircase, one step at a time, always standing on the last solid step.

That self-supporting behavior is part of why stick remains the fallback for structural vertical work, one of the enduring Advantages of Stick Welding: deep, reliable fusion with no gas bottle and no wire feeder on a ladder.

Weave Patterns and the Pause at the Toes

The two workable patterns are the J-weave and the crescent. In a J-weave you carry the rod across the joint, hook down at one toe, sweep the middle, and hook at the other. Pause 0.5 to 1 second at each toe; that pause lets the pool wet into the bevel wall and freeze just short of the edge. Skip it and you get undercut on every pass.

Move fast through the center, where the shelf already supports the metal, and slow across the toes. Do not whip the rod out of the puddle: that habit comes from vertical-down 6010 roots, and with a low-hydrogen rod it causes cold lap and ragged ripples.

Reading the puddle is the real skill. Watch the shiny solidification line just behind the arc and keep it even and slightly ahead of the toes. If the pool turns wide, dull gray, and sags, you are too hot or too slow. If the line vanishes behind a thin, frosty puddle that will not wet out, you are too cold or moving too fast. Fix it with travel speed before touching the dial.

Stringers or Weaves?

Stringer beads are straight, non-weaving passes placed side by side. They put less total heat into the plate, reduce grain growth and residual stress, and are far more forgiving on the toes. Many procedure specifications require stringers, and increasingly many code references limit or discourage weaving for those metallurgical reasons, as covered in the qualification guidance at GoWelding.org. Where weaving is allowed, procedures cap the weave at roughly two to two-and-a-half electrode diameters. For a first coupon, run stringers.

Restarts and Travel Speed Discipline

Stop a rod before it burns out: leave about half an inch, freeze it, then grind the crater into a taper. Restart on the ripple of the previous pass at a slight downward angle, strike on completed metal, wash up onto the shelf, and continue. Never restart on a crater or cold slag. Chip and wire-brush every pass, because trapped slag is the most common reason a clean-looking 3G coupon fails at radiography.

Travel speed ties it together: move at the pace where the puddle holds the same width for the whole pass, and speed up near the top as the coupon heats up. Consistency, not cleverness, is what the inspector is looking at.

Common 3G Stick Welding Defects and How to Fix Them

Vertical stick welding rarely fails silently. The puddle tells you what is going wrong; the trick is reading it while the rod burns. Every reject on a 3G coupon traces back to a small set of variables: amperage, arc length, travel speed, electrode angle, or joint cleanliness. Connect the visible defect to its cause and you correct the next pass instead of guessing.

Undercut at the Toes

Undercut is a groove melted into the weld toe that the filler never filled, and it is one of the most common visual rejects on a plate test. On a vertical weave the usual cause is a pause that is too brief at the edges: sweep across without dwelling and the arc digs into the sidewall and leaves a valley behind. High amperage, a long arc, and fast travel compound the problem.

Fix: build a visible shelf, then pause at each toe long enough for filler to flow into the corner. If undercut persists, drop 5 to 10 A, shorten the arc to about the electrode core diameter, and slow the middle of the weave. As the acceptance criteria in Go Welding’s 3G SMAW guide show, a weld can be flawless in the middle and still fail on a thin toe groove.

A Sagging or Dripping Puddle

This is the signature 3G problem: the molten pool sags down the bevel, lumps form at the bottom, and the bead comes out lumpy and uneven. Amperage set for flat welding is the usual culprit, along with slow travel and oversized rods. It also shows up when the previous pass has not solidified, so you are welding onto a pool still liquid underneath.

Fix: cut about 10 A from your flat setting, speed up slightly, and watch the solidification line at the top of the puddle. It should stay steady just above your rod tip. If it keeps melting upward and the shelf disappears, you are adding heat faster than the plate can remove it. Match rod type and diameter to the position before striking an arc, as this guide to all position welding rods explains.

Convex Beads and Poor Tie-In

A tall, ridged bead sitting on top of the groove instead of tying into the sidewalls means the arc spent more time in the center than at the edges. Low amperage, a narrow weave, and fast travel all pile filler up without wetting it in. Fix: widen the weave, hold each toe until you see the puddle wet out, and consider adding 5 A. A good cap is flat to slightly convex, with the toes blending smoothly into the plate.

Porosity

Gas pockets almost always come from contaminated consumables or a long arc. E7018 is a low-hydrogen rod that absorbs moisture from shop air, and a damp coating releases hydrogen straight into the puddle. Oil, paint, mill scale, and rust in the bevel do the same. Fix: store 7018 rods in a sealed rod oven and re-bake per the manufacturer’s holding temperature, clean the bevel faces to bright metal, confirm DCEP polarity, and keep the arc tight. The same moisture and prep discipline applies to any process, including aluminum flux core welding, where porosity is even less forgiving.

Slag Inclusions

Slag inclusions are almost entirely a housekeeping failure. Every pass leaves a flux coating that hardens into glassy slag, and laying the next pass over it traps that slag permanently. Fix: chip and wire-brush every single pass before the next one, no exceptions, even when the slag peeled cleanly on its own. Inspect under light before restarting, and overlap the previous bead’s toes so no narrow channel remains for slag to hide in.

Lack of Fusion and Cold Lap

Cold lap appears as filler sitting on the surface without bonding, most often at the root or the sidewalls. Low amperage, fast travel, a root opening too narrow for the rod, or pointing the electrode too far forward all starve the joint of heat. Fix: increase amperage modestly, drag so the arc points back into the puddle and into the joint, and dwell at each toe until the sidewall actually melts. Check that the root opening fits the rod diameter before tacking, as the technique breakdowns in Welding Tips and Tricks’ vertical stick guide explain.

Rod Sticking, Arc Blow, and Cracking

• Rod sticking. If the electrode welds itself to the coupon, your amperage is too low or you shoved the rod too deep into the puddle and killed the arc. Add about 5 A and restrike. When it sticks, release the stinger immediately instead of wiggling free; twisting leaves a tack of filler that becomes a slag inclusion later.
• Arc blow. Magnetic arc blow intensifies near the top of a 3G plate as the ground path and remaining land change, pushing the arc to one side, with uneven penetration and erratic stops to follow. Move the ground clamp closer, shorten the arc, and angle the rod slightly in the direction of travel. If your procedure permits it, running AC instead of DC noticeably reduces arc blow.
• Cracking. Cracks usually show up at stop-start points, craters, or across a bead deposited too large on a restrained joint, and hydrogen from damp rods plus rapid cooling makes it worse. Use smaller stringer beads on fill passes, back up slightly to fill craters before breaking the arc, keep up strict low-hydrogen rod handling, and hold the preheat and interpass temperatures your procedure specifies.

How to Practice and Pass a 3G SMAW Weld Test

Knowing the theory of vertical-up stick welding is one thing. Walking into a test bay, striking an arc on a beveled plate, and producing a weld the inspector will accept is another. The good news: a 3G test is highly repeatable. Coupon dimensions, setup, and acceptance criteria are written down in advance, so you can rehearse nearly every variable before test day. The basics in Advantages of Stick Welding: Why SMAW Still Wins explain why stick remains the default test process for structural plate.

Coupon Prep: Getting the Plate Right Before You Strike an Arc

Most 3G plate qualifications follow the AWS D1.1 test configuration. The typical coupon is a 3/8 in (10 mm) thick plate with a single-V groove, backed by a backing bar 1/4 in to 3/8 in thick that becomes part of the weld. The root opening is 1/4 in, and the cheapest, most reliable way to set it is to slot two 1/8 in electrodes into the gap as spacers, tack the plates, then pull the rods out. That trick keeps the root consistent across every coupon you burn.

Tack from the back side so the tacks sit outside the groove and don’t contaminate the root pass. Grind tack toes smooth where they meet the backing bar and knock off any sharp edges that will snag a rod. Clean mill scale, oil, and rust from the bevel faces about an inch back from the joint; contamination on a low-hydrogen root pass shows up later as porosity the inspector will not accept.

Pass Sequence: Root, Fill, Cap

A clean 3G coupon comes together in three stages, each with its own job:

Pass	Technique	Goal
Root	Stringer bead, tight arc, slight side-to-side keyhole motion	Full penetration into the backing bar with a smooth, flat face for the fills
Fill	J-weave or crescent, pausing at the toes	Build the joint evenly while fusing into both sidewalls
Cap	Wider weave, tie into both toes, slightly convex profile	Cover the groove, blend the edges, no undercut

The root is where tests are passed or failed. Run it as a stringer with the arc buried slightly into the joint, watching the leading edge of the puddle wet both walls and the backing bar. If the root freezes low or humps up, the fills have no flat floor to stack on.

Slag discipline separates pros from strugglers. Let each pass cool until the slag dulls, chip it, wire-brush it, and actually look at the metal before running the next pass. Every speck of trapped slag becomes an inclusion on an X-ray. Chip the toes carefully, not aggressively, so you don’t gouge the weld you just laid down. Technique refinements, including puddle-reading cues, are covered in Welding Tips and Tricks’ vertical stick welding guide.

What the Inspector Looks For

Visual inspection comes first, and it is unforgiving. Expect the inspector to check for undercut at the toes, convexity of the cap, porosity, lack of fusion at the sidewalls, plate misalignment, and cracks of any size. The smart move is to inspect your own coupons with the same eye: turn them over, check the backside for penetration, and run a file along the toes. If you can feel a groove, the inspector can see it. Test-day expectations and typical coupon setups are outlined in Go Welding’s 3G SMAW certification overview and in state DOT welding standards such as South Dakota DOT Chapter 10, Welding.

A Progressive Practice Plan

Don’t start on a true vertical plate. Experienced instructors have candidates begin with the practice plate tilted to roughly 45°, so the puddle stacks while gravity still works with you. Run stringer beads at 45° until they’re flat and consistent, then steepen the plate incrementally: 60°, 75°, then fully vertical. Each time you increase the angle, expect the puddle to sag slightly, so shorten your arc and slow your travel a touch before adding weave width.

By the time you’re running true vertical-up, the motion should feel boring: tight arc, steady weave, deliberate pauses at each toe, consistent arc time between restarts. Restart practice matters as much as travel practice. When the rod gets short, stop, strike ahead of the crater, tie into the previous bead, and keep the puddle small as you resume. A coupon that looks perfect except for three crater cracks at restarts still fails.

Work through this progression deliberately, in the same order every session: set up the coupon, check temperature, run the root, inspect, fill, inspect, cap, inspect. Do it enough times and the 3G test stops being an event and becomes a routine you have already passed in the shop.

Safety, Fumes and Ergonomics in Vertical Stick Welding

A 3G test breaks the usual safety setup: the plate stands upright, your face close to the arc, and the fume plume rising straight through your breathing zone instead of drifting over your shoulder. Add a helmet, both arms raised and a craned neck, and vertical stick welding creates exposures and strains no other position matches.

What Is Actually in Welding Fume

Welding fume is not one substance but a shifting mixture of metal oxides from the electrode and base metal, plus combustion products from the flux coating. Mild steel with E7018 is mostly iron oxide with manganese along for the ride, and the recipe shifts with the consumable: alloy steel welding electrodes bring chromium and nickel, stainless work adds hexavalent chromium, galvanised or painted stock releases zinc and coatings, fluorides in basic flux are their own airway irritant, and process matters too, so aluminium MIG adds aluminium oxide and ozone.

Two findings frame the risk. The International Agency for Research on Cancer classified welding fume as Group 1 carcinogenic to humans: all welding fume can cause lung cancer and may cause kidney cancer. The NIOSH criteria document 88-110 reports roughly a 40% increase in relative risk of lung cancer among welders. Neither conclusion depends on the process: both apply to the smoke curling off a vertical root bead.

Exposure Limits Worth Knowing

The numbers an industrial hygienist will bring up:

Pollutant	Standard	Limit
Hexavalent chromium, Cr(VI)	OSHA PEL, 29 CFR 1910.1026	5 µg/m³ as an 8-hour TWA
Manganese	NIOSH REL	1 mg/m³ TWA; 3 mg/m³ STEL
Manganese	OSHA PEL	5 mg/m³ ceiling

Notice the manganese gap: the NIOSH recommended limit is five times lower than OSHA’s enforceable ceiling, so “legal” and “safe” are not the same target, and controls sized only to OSHA’s number can still leave you above the NIOSH recommendation. OSHA’s welding, cutting and brazing hazard guidance sets the control framework, including when exposure assessment and written programs apply.

Ventilation Hierarchy: What Actually Works

• Source capture first. A fume extraction gun or hood at the arc keeps plume out of your face before it mixes with room air.
• Local exhaust next. A positioning arm or downdraft bench works when the intake stays close.
• General dilution ventilation only as backup, because it cleans the room, not your breathing zone.
• Respirators last, not first.

A NIOSH control-technology study found that ventilated controls reduced fume exposure by up to 83% with a fume extraction gun, while some systems, including a canopy hood, were completely ineffective. An overhead canopy catches nothing: by then the plume has already passed you.

The UK Health and Safety Executive estimates that 40 to 50 welders are hospitalised each year from breathing metal fume at work, most often metal fume fever after welding galvanised or stainless material. Symptoms can arrive hours later: chills, nausea, metallic taste, aching. Confined spaces raise the stakes, since a vessel, pit or tank concentrates the plume and demands forced ventilation, atmospheric monitoring and a permit. Canada’s federal welding health and safety guide covers these controls in practical detail.

PPE: Eyes, Skin and Lungs

Vertical work keeps UV intensity pointed at your face and neck. Photokeratitis, or arc eye, is a sunburn on the cornea, and it hurts most when you wake up. Run a properly shaded lens, most stick work falls between shade 10 and 13 depending on amperage, keep safety glasses underneath, and collar your jacket so no skin catches reflected arc light. OSHA’s welding hazard fact sheet summarises PPE on the shop floor. For respiratory protection, choose a fit-tested half-face with P100 or combination cartridges; facial hair where the seal touches defeats it entirely.

Ergonomics: The Strain Nobody Warns You About

Vertical-up punishes posture: both arms elevated, weight forward on the balls of your feet, and the cap pass tilts your head back while the helmet levers against your neck. An hour of that brings cervical strain, shoulder tightness and a stiff lower back long before your bead skills run out. Fix the setup: coupon at chest height, elbows relaxed and close to your body, a staggered stance, forearm braced against clean stock when the rod gets short, and a reset between passes rather than chasing the puddle. Taking the stick advantages in context, SMAW brings portability and penetration but lays down a heavy plume and demands more stillness than wire.

Vertical 3G practice writes bad fume and posture habits into muscle memory. Ventilate first, position your body before you strike an arc, and train as if an inspector is watching both coupon and shop air. The certification test checks the weld; your lungs keep score of everything else.

3G vs Other Positions and Processes: Comparisons

With so many weld test positions out there, it’s easy to assume that passing 3G means you’re qualified for every vertical joint. In reality, the 3G position is very specific, and knowing how it stacks up against the others can save you a lot of wasted test coupons.

3G vs 1G, 2G, and 4G

The four basic plate groove positions are all tested differently, and each one only qualifies what it says it does:

• 1G (Flat): The plate is in the flat position, with welding performed from above. This is typically the easiest for penetration and puddle control.
• 2G (Horizontal): The groove is horizontal. Gravity pulls the puddle down, forcing the welder to fight sag while still maintaining full fusion into the groove walls.
• 3G (Vertical): The plate is vertical, and for a structural plate groove test, progression is almost always vertical-up. This is the position we’re focusing on, and it heavily tests your puddle manipulation.
• 4G (Overhead): The plate is above you, and the puddle is trying to drop straight onto your hood. It’s its own battle entirely.

The most important takeaway is this: a 3G-only qualification does not cover overhead. Both 4G and 4F remain outside of its scope, which is exactly why so many welders take the 3G/4G combination test. It’s the most common route to broaden their qualifications without running every position individually.

Vertical-Up vs Vertical-Down

Not all vertical travel is created equal. When working with all-position welding rod selections for uphill work, the goal is almost always to build a shelf for the puddle to sit on. Structural welding defaults to vertical-up for this exact reason. Going uphill allows for much deeper penetration, better root fusion, and far more control over the solidification of a groove weld.

That being said, vertical-down does have its place. It’s common for cosmetic work, thin material, and some pipe applications with E6010. However, it is not permitted for structural plate groove welds under AWS D1.1 defaults. Speed is the appeal, but the tradeoff is drastically shallower penetration, making it far less reliable for load-bearing joints.

Stick vs FCAW vs GMAW in the Vertical Position

While FCAW and GMAW can also be tested in 3G, stick SMAW remains the most common process for field structural qualification. Each process has its strengths and drawbacks once you’re fighting gravity:

• SMAW (Stick): Extremely portable, forgiving of outdoor conditions, and widely accepted by structural codes. The downside is the need for frequent rod changes and strict low-hydrogen storage.
• FCAW (Flux-Cored): Great deposition rates and can be very productive. Self-shielded FCAW is field-friendly, however, fume output tends to be higher and some procedures can be less common for certain local code tests.
• GMAW (MIG/Solid Wire): Clean, fast, and efficient in a controlled shop. In the vertical position, however, it leaves very little room for error. Without proper technique and equipment, sagging is far easier to get, and it’s less common for bare-minimum field plate groove qualifications.

Code Numbers Every 3G Welder Should Know

When prepping for a code test, the fine print matters. As referenced within AWS D1.1 prequalified procedure guidelines, a vertical layer only needs to be split into side-by-side runs when wider than 25 mm, as opposed to 16 mm in flat, horizontal and overhead. Additionally, the single-pass upper limits for stick are 10 mm flat, 8 mm horizontal, 12 mm vertical, and 8 mm overhead. These numbers show exactly why vertical-up gets a little more leeway than overhead, whilst still being far more restrictive than flat.

At the end of the day, 3G is the bridge between the “easy” positions and the “unforgiving” ones. Knowing its limitations compared to 1G, 2G, and 4G, as well as the uphill vs downhand debate, will not only help you pass your test, but it’ll help you pick the right, code-compliant approach for the job at hand.

Practical Tips, Mistakes to Avoid, and Conclusion

Passing a 3G stick welding test comes down to discipline more than natural ability. With that in mind, here’s a practical breakdown to use on the shop floor, in practice, and leading up to test day.

Your 60-Second Pre-Weld Setup Routine

Before you strike an arc, run through these five checks to avoid preventable issues:

1. Polarity and amperage: Set DCEP and dial your machine about 10-15% below the flat-setting amperage for that rod diameter. This helps prevent the puddle from sagging on the uphill climb.
2. Consumables: Use low-hydrogen rods such as 7018 straight from a sealed quiver or rod oven. If they’ve been left out, moisture is a very real concern. Leave rods like 6010 or 6011 for their intended applications.
3. Joint prep: Check for your 1/4 in root opening with two 1/8 in spacer rods, inspect back-side tacks, and clean about an inch of the bevel face on both sides of the groove.
4. Grounding: Place your ground clamp directly on the coupon or fixture, in line with your weld path. This helps cut down on the arc blow you’ll often feel near the top of the plate.
5. Body position: Get your feet planted, elbow braced or tucked, and rod hand supported before your helmet comes down. You’ll need this stable stance for the full pass.

The Ten Most Common Beginner Mistakes

1. Running flat amperage: Always drop 10-15% for vertical-up work.
2. Long arcing: Keep your arc length roughly equal to the rod diameter.
3. Speeding up at the top: Heat builds as you climb, so slow your travel through the top third of the coupon.
4. Skipping slag removal: Chip, wire brush, and inspect between every pass. Don’t rely on grinding to fix a dirty tie-in.
5. Over weaving: Keep your weave no wider than necessary. Excess width equals excess heat and a higher chance of sag.
6. Neglecting the toes: Pause at each toe to tie in properly, as undercut is easily spotted by a visual inspector.
7. Wrong rod selection: Not every all-position rod behaves the same. Our All Position Welding Rod Guide: Types, Uses & Tips can help narrow down your options.
8. Damp 7018: Improperly stored low-hydrogen rods are one of the most common culprits for porosity in the cap.
9. Poor ground placement: Clamping far from the joint can cause unwanted arc wander as the bead progresses.
10. Watching the arc, not the puddle: Focus on the solidification line of the molten pool to read travel speed, fusion, and when you’re about to drip.

A Four-Week Practice Plan

Week	Focus	Target
1	Padding beads on 3/8 in plate, moving from 45° to true vertical-up	Uniform stringers with no sag
2	Vertical fillet (3F) tee joints	Tied-in toes with little to no undercut
3	Open-root groove coupons: root, fill, and cap with full slag removal between passes	Clean transitions and solid root fusion on visual
4	Full test conditions on 3/8 in plate with backing, timed with no breaks	Two or three consecutive coupons you’d submit for visual

While not a hard requirement, many welders find their confidence click after burning through a good amount of rod. More importantly, take time to learn the strengths of your process by reading about the Advantages of Stick Welding: Why SMAW Still Wins to better speak to its value on structural plate.

When to Seek Certified Instruction

It’s time to bring in an instructor if the same defect persists after three deliberate corrections, you can’t explain why your bead is behaving a certain way, or you’re getting close to a paid test and are still guessing at amperage. An instructor can spot body position and arc length from angles you simply can’t see. Structured programs can also open the door to other qualifications, and resources such as our Aluminium Welding Course: What You Learn, Costs & Careers can give you an idea of how those paths are organized.

Don’t overlook ventilation either. OSHA requires engineering controls, ventilation, or respiratory protection sufficient to keep worker exposures below permissible exposure limits under 29 CFR 1910 Subpart Q and related standards. A shop fan across the room is not a compliance program, especially with vertical-up work putting you directly above the fume plume.

Conclusion

At its core, 3G is the vertical-up groove weld test position for plate in SMAW. Passing it proves you can deposit a root, fill, and cap in a beveled coupon to meet the visual and NDE criteria of your code. It’s a qualification, not every vertical weld you’ll ever run, but it’s often the first one employers look for.

The formula is simple, if not glamorous: set 10-15% below flat amperage, keep a tight arc, build your shelf, pause at the toes, clean slag between passes, and log enough practice to read your puddle. As 3G SMAW certification guidance points out, practicing on the actual coupon geometry is what makes test day feel like just another practice run. Stick to your checklist, put in the reps, and that inspector across the room will be far easier to ignore while you lay down your cap.

Frequently Asked Questions

What does 3G mean in stick welding?

3G is the vertical plate groove weld test position used in AWS and ASME welder qualification. The ‘3’ identifies the vertical position and the ‘G’ stands for groove weld, as opposed to a fillet weld (3F).

Is 3G stick welding done uphill or downhill?

For qualification and structural production work, uphill (vertical-up) is the standard. AWS D1.1 treats travel direction as an essential variable and defaults to upward progression for vertical plate welds, so a 3G test qualified uphill does not also qualify downhill.

Which electrode is best for 3G welding?

E7018 low-hydrogen rod is the most common choice for structural 3G groove tests, often paired with E6010 or E6011 for the root pass. Keep 7018 rods in a rod oven or heated quiver, since damp low-hydrogen flux causes porosity and can contribute to cracking.

What amperage should I use for 3G vertical-up with 7018?

For a 1/8 in (3.2 mm) E7018, vertical-up typically runs about 100-115 A, roughly 10-15% below your flat setting for the same rod. Start low and adjust upward only until the puddle wets out without sagging.

What does a 3G certification qualify me to weld?

Under AWS D1.1, passing a 3G plate test qualifies you for flat, horizontal and vertical groove welds (1G, 2G, 3G) and the corresponding fillet positions (1F, 2F, 3F). It does not cover overhead, which requires a separate 4G test.

Why is my weld puddle sagging in the 3G position?

The usual causes are amperage too high, travel speed too slow, or an arc that is too long. Reduce amps by about 10 A, shorten the arc to roughly the rod diameter, and move fast enough that the trailing edge of the pool freezes before gravity pulls it down.

What is the difference between stringer beads and weaving in 3G?

Stringer beads are straight passes with little manipulation; weaves oscillate across the joint. Many WPSs and codes specify stringers because weaving raises heat input and can cause grain growth and higher residual stress, but a controlled J-weave with pauses at the toes is common for fill and cap passes.

How dangerous is welding fume in vertical stick welding?

IARC classifies all welding fume as Group 1 carcinogenic, and NIOSH reports roughly a 40% increased relative risk of lung cancer among welders. Use local exhaust ventilation, position yourself upwind of the plume, and wear appropriate respiratory protection when engineering controls are insufficient.