603 Welding & Erection

Past Work

Nine recent jobs across New Hampshire, Massachusetts and out of state. Erection, structural welding, reinforcement and stairs, from 2025 and 2026, with work still running.

Scope, town, year and who did the hiring, on every one.

Free estimate on every job

Zachary’s own photographs, taken on jobs and repairs across New Hampshire and Massachusetts.

Crane setting bar joists over a concrete shell in winter, joists staged on the slab ready to be flown
Crane setting bar joists over a concrete shell
Looking up at a completed steel frame with bar joists and bridging, a boom lift working the top chord
Completed frame with joists and bridging
Close up of a completed fillet weld where a steel beam meets a bolted column connection
Fillet weld at a bolted column connection
Welder in a hood and gloves running a bead on steel decking, arc lit
Running a bead on steel decking
Rooftop grillage steel laid out on sleepers, carrying pipe runs and mechanical services
Rooftop grillage laid out on sleepers
Galvanized support frame set on a flat roof to carry new rooftop mechanical equipment
Support frame set to carry a new rooftop unit
Steel transition plate welded between grating panels over a service trench
Transition plate welded between grating panels
New tooth adapters welded onto the cutting edge of an excavator bucket during a rebuild
New tooth adapters on an excavator bucket
The 603 Welding and Erection flatbed truck with the diesel welder and lead boxes mounted behind the cab
The rig — this is what shows up

These are shot on a phone between lifts, not by a photographer. Some jobs are documented well and some were never photographed at all.

Every job on the list

Nine jobs across four scopes, 2025 and 2026.

Steel erection

3 jobs

Standing the frame: columns, beams, bar joists and metal decking — frames stood floor by floor.

  • 01

    Steel erection

    Bedford.

    NH · 2026

    Another steel company

  • 02

    Steel erection - still running

    Chestnut Hill.

    MA · 2026

    Another steel company

  • 03

    Columns and beams set for an outdoor cooler frame

    Walpole.

    MA · 2026

    General contractor

Structural welding

3 jobs

The weld scope on someone else’s steel: wind brace, moment connections and column splices — connections welded to engineer specs, made to the AWS structural code.

  • 04

    Wind brace and moment connections

    Out of state.

    Beyond the normal radius · 2025

    Another steel company

  • 05

    Moment connections welded

    Lebanon.

    NH · 2025

    Another steel company

  • 06

    T-beam stitch welding on existing steel, for beam reinforcement

    Salem.

    NH · 2025

    Another steel company

Reinforcement and retrofit

2 jobs

Adding steel where a roof or floor is asked to carry more than it was drawn for: round bar stitch welded to the chords and angle iron run down to the nearest panel point, to the engineer specification — joists strengthened for new loads. Above the deck, the same jobs need frames built for mechanical units.

  • 07

    Bar joist reinforcement, panel point reinforcing, rooftop unit reinforcement, and new bar joists added inside an existing building

    Londonderry.

    NH · 2025

    General contractor

  • 08

    Bar joist reinforcement, grillage frames, rooftop unit frames, railings and grating

    Middleborough.

    MA · 2026

    General contractor

Stairs and access steel

1 job

Taking out an existing stair and installing new stairs and railings — stair steel demolished and replaced.

  • 09

    Existing stair demolition, new stairs and railings installed

    Sudbury.

    MA · 2025

    General contractor

Most of this work came through general contractors and other steel erection companies. Their client lists are theirs to publish, not ours, so these entries carry the scope and the town and nothing that identifies the building. If you want to speak to someone who has bought this work, ask and he will make the calls.

5/9

came from another steel company

What "hired by another steel company" means

Five of these nine came from another steel company rather than from the contractor running the job. On those, 603 was the subcontractor and the other company held the contract.

Speaking about the business generally rather than about any one of these jobs, Zachary puts it this way: a lot of the work is structural welding for other steel erection companies. Why any particular company brought us in on any particular job is theirs to say, not ours to publish.

The other four came in from a general contractor directly.

Checking us out

Reference and Project Details

Q.01

Can you give references?

He can ask several past clients. Say what you need to hear and from whom, and he will make the calls.

Q.02

Were you the main contractor on these jobs?

On four of them the general contractor hired us directly. On the other five another steel erection company held the contract and we were the subcontractor.

Q.03

How recent is this?

All of it is 2025 and 2026, and the Chestnut Hill erection is still running. There is no ten-year back catalogue - the company was founded in 2024. The trade behind it is a good deal older than that.

Q.04

Do you have photos of a job like mine?

Possibly. Describe the scope you have in mind and he will go through what exists and send whatever is closest to it.

Ask about a job like yours

Send the bid invite and the drawings, or describe the scope on the phone. Free estimate on every job.

  • Free estimate, always
  • Same-day answer
  • NH, MA, ME and VT

No obligation

Get a number
on your steel.

Send a bid invite, a drawing set, or a photo of the thing that broke. The estimate costs nothing either way.

  • Free estimate on every job

    Written for big work, a number on the phone for small work.

  • Both trades, one contract

    Steel erection and structural welding, both on one contract.

  • AWS D1.1 and D1.8

    General liability 1M/2M and workers comp. COI same day on request.

  • 100 miles from Manchester

    New Hampshire, Massachusetts, Maine and Vermont. No travel fee.

  • A machine that has stopped

    Emergency equipment repair runs 24/7, separate from the working week.

Rather talk it through? Call (603) 660-2011
Zachary Oak, owner of 603 Welding and Erection

Zachary Oak

President & Lead Welder

5.0

on Google

Get a number on it

Free estimate, answered the same day. Attach drawings if you have them.

Drawings or spec

Faster on the phone: (603) 660-2011