Mon-Fri 4 a.m.-8 p.m. · we pick up nights and weekends(603) 660-2011

Welder Manchester NH

Forged with precision.Built to last.

Welder in Manchester, NH, for steel connections on a new building, and for the plow that broke this morning. Free estimates, and we come to you: call (603) 660-2011 or send the drawings.

Most of our structural work comes from general contractors and other steel companies. They bring us in for the erection, the welds or both. The rest is equipment that stopped working. So we fix it where it sits.

  • AWS-certifiedWelding to D1.1 and D1.8
  • We come to youJob sites, farms and yards
  • Nights and weekendsWe pick up the phone
Call (603) 660-2011
Zachary Oak, owner of 603 Welding and ErectionZachary OakOwner. The one who picks up.
Free estimate

Send the drawings

Or a phone picture of what broke. Big jobs get a written estimate, small ones a number on the phone.

Free estimate · No obligation · Faster on the phone: (603) 660-2011

Worked on

Dartmouth College · Toyota/Ira in Bedford · Stop and Shop in Walpole · Hannaford in Middleborough. Each time a general contractor or another steel company brought us in.

  • AWS D1.1 and D1.8
  • Insured, COI the same day
  • Free estimates
  • Travel included in the estimate
  • Veteran-owned
Welding, on site

Structural welding, mobile repairs and emergency calls

Welding is the trade this company is built on, and all of it is carbon steel. Almost all of it happens on site, because steel that's already standing can't come to us. Neither can a machine that won't move.

Structural welding

Fillet weld at a beam-to-column connection

On a steel job the welds get inspected against the drawings, so they have to match them. We weld moment connections, wind brace and column splices to AWS D1.1 and D1.8. Most of it is for steel companies that can't cover the weld scope on their schedule. That's why so much of our work is welding moment and splice connections on frames someone else set.

Mobile welding

The rig: flatbed, diesel welder and lead boxes

A cracked trailer or a broken loader arm usually can't be hauled anywhere. So the welder comes to you, on a Ram 3500 flatbed with a diesel welder and leads. That way the repair starts where the machine stopped, and nobody has to haul it in first. That's the whole idea of a rig at your site.

Emergency welding repair

Running a bead, arc lit

When a plow frame cracks in the middle of a storm, the route stops until it's welded. That's why landscapers call us in the winter. We pick up nights and weekends, so you're not waiting until Monday. Within about 20 miles of Manchester we can be on site the same day: help when something breaks tonight.

Commercial welding

Support frame for new rooftop equipment

Welding inside a store or a dealership has to fit around the people who work and shop there. So we work around the schedule the general contractor and the owner set, not the other way around. Retail jobs reach us through GCs, and dealerships do too. Ask us about welding in stores and dealerships.

Weld repair

A weld that fails inspection doesn't get covered over, whether it's on a new frame or an old machine. It comes out. We gouge it with carbon arc and weld it again, so the inspector sees a clean, sound joint. That's what fixing welds that failed inspection comes down to.

Steel cutting and removal

Before new steel goes in, old steel often has to come out. We cut with oxy-fuel and gouge with carbon arc right on site, so the new steel can go in after. On a store job, the general contractor had us take out an old stair and set the new one. That's a typical case of cutting out old steel.

Trailer repair

Jack and tongue hardware welded onto a trailer frame

Trailers crack where the load and the road work on them, around the frame, the tongue and the ramps. The repair happens on site, in carbon steel, so the trailer can get back to hauling. A dump trailer gets welded where it's parked, so it's off the road no longer than it has to be. Bring us your cracked trailer frames and ramps.

Hitch and gooseneck repair

Maybe you spotted it while hooking up: a hairline crack at the coupler or the gooseneck. A crack like that grows under load, so it's worth a look before the next haul.

We repair the trailer side: the coupler, the tongue and the gooseneck. No auto body or car frame work. The cracked steel gets ground out and welded, not patched over. Send a photo of your cracked couplers and gooseneck tongues, and we'll tell you what it needs.

How we weld

Flux core wire feed instead of slow stick welding

Stick

Stick welding works. It's slow, though.

One rod at a time
Flux core wire feed

Flux core wire feed is what we run on structural steel, through LN-25 feeders off diesel machines. That moves a lot faster.

  • LN-25 wire feeders
  • Diesel machines on the rig
  • Structural steel

For a general contractor that means the weld scope doesn't hold up the next trade.

Crane setting bar joists over a concrete shell in winter
Crane setting bar joists over a concrete shell in winter
Steel erection

Steel erection for GCs and steel companies

Steel shows up on trucks, but somebody has to stand it up. We start from the drawings and pick a spot for the crane.

Then we shake out the iron, which means sorting the delivered steel piece by piece. We stand the columns, connect the beams and joists, and plumb and bolt up so the frame stands straight. Last, we land the metal deck.

Our crew does the erection and the structural welding in-house, so you don't need a second sub for the welds. Steel companies bring us in for exactly this kind of steel erection for contractors.

Rooftop grillage steel carrying pipe runs and mechanical services
Rooftop grillage steel carrying pipe runs and mechanical services
Support frame set on a flat roof for new rooftop equipment
Structural steel

Structural steel work in buildings already standing

A lot of steel work happens after the frame is up. New rooftop units add weight, so the bar joists may need reinforcing and the units need frames to sit on. General contractors bring us in for that on renovation jobs. It means joist reinforcement, plus grillage and RTU frames, the steel a rooftop unit sits on.

We also set columns and beams for additions, like the frame for an outdoor cooler. Lintels and beams in houses are smaller, but they follow the same engineer's specs. All of it counts as steel work beyond the frame.

Looking up at a steel frame with bar joists and bridging
Looking up at a steel frame with bar joists and bridging
Metal buildings

Metal buildings, from the drawings up

We erect pre-engineered metal buildings across New Hampshire and the states around it. Every one comes with its own drawings. So the erection starts there.

So send the building drawings and the site location, and tell us what's already supplied. We walk the site and go through the drawings before we give you a free estimate for the erection. That's how we start on the metal buildings we put up.

Iron works

Iron works: stairs, railings and misc metals

After the frame comes the steel people walk on and hold on to. We hang stair stringers, headers and stair pans floor by floor. The pans go in as we climb, so we can work our way up safely off of them.

Railings, grating, catwalks, mezzanines and ladders follow. On store jobs that has meant railings and grating, or a new stair with its railings. So for a general contractor it's one crew for the stairs, rails and misc metals on the job.

Steel transition plate welded between grating panels over a service trench
Rebuilt excavator bucket with new teeth welded on
Rebuilt excavator bucket with new teeth welded on
Tracked screening plant in a yard, ready for a welding repair
Equipment repair

Equipment repair for farms and contractors

Farms, landscapers and site contractors run steel hard, so it breaks at the worst time. We weld bucket teeth, cutting edges and hardfacing. We also repair snow plows, dump bodies on heavy trucks, trailers and heavy equipment.

Plow season runs December to March, so winter is when most of those calls come in. We come to your yard, because hauling a dead machine anywhere costs you another day. That's why we do repairs on heavy machines where they sit.

Paperwork

Insured, with a certificate the day you ask

A general contractor's paperwork comes before the first weld, so we keep ours ready.

  • We're insured, with general liability and workers' comp, and we send a certificate of insurance the same day you ask.
  • We handle hot work permits, site safety plans and insurance certificates, and we work to whatever the site requires.
  • Our training covers OSHA 10 and OSHA 30, fall protection and aerial lifts.
  • It also covers rigging and signalling, confined space and hot work, because a steel site asks for all of it.
  • We've done prevailing wage work, we're open shop, and GCs find us on BuildingConnected for bid lists.
  • New construction comes with the standard one-year warranty.
How a job runs

From the first call to the final inspection

Every job runs the same five steps, big or small.

  1. You call

    We talk over the project, the location and when it needs to be done.

  2. We walk the job

    We meet you on site, go through the scope and get the drawings, on paper or as files.

  3. You get a fair number

    We dig into the details and the drawings. Free estimates: in writing for big jobs, a number on the phone for small ones.

  4. The proposal is accepted

    We put a contract in place, then get the job done.

  5. Inspections

    Structural inspectors check the work as it goes, against the engineer's specs. When everything is done, there's a final inspection.

Zachary Oak, owner of 603 Welding and Erection
Zachary Oak on a job site in a hard hat, hi-vis and fall protection harness
Who shows up

Who shows up: Zachary Oak

I'm Zachary Oak. I learned most of the trade from my father. He's been in it for 25 years, so I started young, and I've been in it for ten years myself.

Why I started 603, in my own words:
…being reliable, thorough and getting the job done right the first time.

That was 2024. It's still the plan. Show up when I say I will, keep the work clean and explain what I'm doing. And we do not sub the work out.

Zachary OakOwner, 603 Welding and ErectionHis story
Google reviews

What customers say

These are reviews from our Google profile, word for word.

Very professional and always there when he says he’ll be.

★★★★★
“Zach has always done of great job! Very professional and always there when he says he’ll be. Highly recommended!”
Virgilio Bancarotta Jr.Google review
★★★★★
“I had my dump trailers welded my Zach and couldn’t be happier with the results. The work was durable and blown and that's what I needed. He got it finished quickly, and the trailers are holding up great. The best part was I couldn't transport it so Zack came to me! Professional, reliable, and reasonably priced. I’ll definitely be back for any welding needs in the future. Highly recommend!”
Ryan allenGoogle review
★★★★★
“Highest quality of work, real masters of the trade. A blessing to have on any job site.”
Lars RattundeGoogle review
Service area

Where we work

We're based in Manchester, NH, and we work across New Hampshire, Massachusetts, Maine and Vermont. Travel is included in the estimate, wherever the job is.

In New Hampshire, recent jobs took us to

  • Manchester
  • Nashua
  • Salem
  • Londonderry
  • Merrimack
  • Portsmouth

Further out, we worked in

  • Andover, MA
  • Boston, MA
  • Worcester, MA
  • Portland, ME

The work changes with the town, because each market builds different things. In Boston it's often new apartment buildings with retail space, and in Portland apartment complexes or retail spaces. Around Portsmouth it's industrial work, new construction and rehabs.

All service areas
Based in Manchester, NH
Questions

Questions about our welding

More questions

What metals do you weld?

We weld carbon steel, including structural grades like A36 and A992. That's what holds up a steel frame, and it's also what buckets, plows and trailers are made of. So the rig that welds moment connections on a new building can weld a cracked plow in your yard.

Which welding processes do you use?

Each process has its own job, so the joint decides which one we use. Flux core wire feed is our main process on structural steel. MIG and stick cover the joints and positions where they fit better. For cutting there's oxy-fuel, and carbon arc gouging takes a weld out when it has to be redone.

Do you come to the job site?

Yes, we come to you. The rig carries its own diesel welder, so we weld on job sites, farms and yards, even without power. When a steel job needs them, we bring telehandlers, forklifts and lifts too. Every job starts with a call or the drawings, and travel is included in the estimate.

Free estimate

Send the drawings, or a photo of what broke

Send what you have: a bid invite, the structural drawings or a phone picture of the cracked part. We'll look at it and come back with a free estimate, so you know where you stand. Or call (603) 660-2011.

Call (603) 660-2011

Free estimate

Send it to the man who does the work

  • AWS-certified, welding to D1.1 and D1.8
  • Insured, certificate the same day you ask
  • We come to you, travel included
  • We pick up nights and weekends
Zachary Oak, owner of 603 Welding and ErectionZachary OakOwner(603) 660-2011

5.0 on Google

17 reviews

Write a review

What customers often mention

“Their attention to detail and work ethic is second to none. Highly recommend.”
Bob · Google review
“Really happy with the work I had done by these guys. They were easy to work with, took the time to make sure everything was done right, and the quality of the work really showed. I appreciate the professionalism and attention to detail. I’d definitely use them again and recommend them to anyone needing welding work.”
Unknown Alias · Google review
“Professional and efficient.”
Scott Michaud · Google review
“Highest quality of work, real masters of the trade. A blessing to have on any job site.”
Lars Rattunde · Google review
“Worked with 603 from start to finish on a structural steel job, the quote for time and cost were met and exceeded; when the gc for our job made a change to the timeline for delivery of steel 603 handled it with ease delivering over a ton of material to site with no rework needed and everything hung like a dream! 603 remains to be the most responsive and organized contractor I've worked with to date and I look forward to using them again for any future misc metals and structural job I might have.”
olivia foos · Google review
“Excellent welding company! The quality of the work was outstanding, and they were professional, reliable, and easy to work with from start to finish. They paid close attention to detail, completed the job in a timely manner, and made sure everything was done right. I’m very happy with the results and would highly recommend them to anyone looking for high quality welding work.”
Colby St.Germain · Google review
“Zach is amazing and does great work. Honest and respectful, highly recommend”
Jaken Pellerin · Google review
“Our family business has been using these guys for lots of recent projects and they are absolutely killing it!”
Aiyana swancott · Google review
“Very knowledgeable, I use 603 for lots of steel work”
Ben Oak · Google review
“I have worked with 603 welding on many different jobs. Highly Recommend any jobs that involves structural steel”
Parker Bradley · Google review
“Always good results. I highly recommend 603 Welding for your structural welds.”
Scott Rouleau · Google review
“Zack is amazing at what he does and would highly recommend him! Thanks Zack!”
Ryan Ordway · Google review
“I had my dump trailers welded my Zach and couldn’t be happier with the results. The work was durable and blown and that's what I needed. He got it finished quickly, and the trailers are holding up great. The best part was I couldn't transport it so Zack came to me! Professional, reliable, and reasonably priced. I’ll definitely be back for any welding needs in the future. Highly recommend!”
Ryan allen · Google review
“Zach has always done of great job! Very professional and always there when he says he’ll be. Highly recommended!”
Virgilio Bancarotta Jr. · Google review
See all reviews on Google
Text us(603) 660-2011