STRUCTURAL STEEL WELDING
Structural Welding in Texas – Beams, Columns, Connections and Repairs Done to Code
Structural welding is the work that holds a building, mezzanine, canopy or stair up, and it is not a place for guesswork. Alpha Mobile Welding TX coordinates partner welders who fabricate and weld structural steel on site across Texas, with the work held to AWS D1.1 practices and the engineer’s drawings where a drawing is required. Load-bearing beams, moment connections, brackets, supports and corroded member repairs are planned, prepped and welded properly. Call 979-250-7486 or send drawings and photos for an estimate.
Load-bearing changes to occupied buildings require an engineer’s stamped drawing and, where applicable, a permit before welding begins.
The scope
What counts as structural welding
Structural welding covers any weld that carries building or equipment load: beams and columns, base plates, moment and shear connections, brackets and hangers, mezzanine framing, stair stringers and landings, canopies and carports, metal building frames and purlin clips, dock supports and equipment platforms. If the weld fails, something falls or sags, which is why it is treated differently from a gate hinge or a trailer tongue.
The governing document for welded structural steel in the United States is AWS D1.1, the Structural Welding Code for Steel. It sets joint designs, prequalified procedures, preheat tables, workmanship limits and inspection criteria. Partner welders hold their work to those practices: correct joint prep, matching filler, preheat where thickness and carbon content call for it, and welds sized to the drawing rather than to habit.
Structural work usually involves an engineer who sizes the member and specifies the weld, a building department that may require a permit and special inspection, and sometimes a certified welding inspector (CWI). Alpha coordinates the welding and tells you plainly when those parties are required.
- Beams, columns, connections, brackets and supports
- Work held to AWS D1.1 practices and the engineer's drawing
- Clear guidance on permits, stamps and inspection
- Field welding with SMAW and FCAW, GMAW where sheltered
- Preheat, distortion control and temporary shoring planned in advance
Common requests
Structural jobs partners see most often
From a single beam in a kitchen remodel to a mezzanine in a warehouse, these are the recurring calls.
Beam for a wall removal
Opening a load-bearing wall means a steel beam on posts or a flush header. The engineer sizes it; partners weld bearing plates, stiffeners and post connections and coordinate shoring with the contractor.
Carports and patio covers
Steel carport and patio frames need welded column-to-beam connections and base plates anchored to footings. Wind load drives the design in Texas, and a permit is common.
Stair stringers and landings
Exterior and interior stairs on channel or plate stringers, welded treads, landings and guardrail posts. Stringer-to-landing connections and post base welds carry real load and are sized accordingly.
Mezzanines and platforms
Warehouse mezzanines, equipment platforms and storage decks need columns, beams, joists and bracing welded square and plumb. These are engineered structures and inspected as such.
Dock supports and canopies
Loading dock levelers, dock canopies and awning frames take impact and wind. Partners replace cracked brackets, reweld hangers and add gussets per the drawing.
Corroded or cracked members
Rusted column bases, cracked beam flanges and bent purlins are cut out, sistered or replaced. An engineer specifies the repair when the member is load-bearing.
Services
Structural welding services on site
Partner welders fabricate and weld structural steel at residential, commercial and industrial sites across Texas.
Beam and column installation
Setting and welding W-beams, HSS columns, channels and angles to base plates, cap plates and existing steel. Field welds laid out to match the connection detail.
Moment and shear connections
Welded flange plates, end plates, clip angles and shear tabs. Complete and partial joint penetration groove welds beveled and welded in the sequence the detail requires.
Brackets, hangers and supports
Pipe supports, equipment brackets, HVAC platforms, sign supports and cantilevered hangers welded to building steel with the fillet sizes the load calls for.
Mezzanine and platform framing
Columns, beams, joists, bracing, deck edge angles and guardrails welded in place. Bolted connections where the drawing calls for them.
Stairs, railings and canopies
Stringers, landings, treads, guardrail posts and canopy frames fabricated and welded to meet the drawing and the applicable building code.
Structural repair and reinforcement
Corroded base plates, cracked welds, damaged purlins and impacted columns repaired with sister plates, doublers and replacement sections per the engineer’s detail.
Why Alpha Welding
Why contractors and owners bring structural work to Alpha
Straight answers about what the job needs before the first arc is struck.
Code-aware, not code-blind
Partners weld to the drawing and AWS D1.1 practices, and tell you when an engineer, permit or inspector is required.
Field-ready processes
SMAW and FCAW for outdoor and wind-exposed joints, GMAW inside, preheat and sequence planned for the section thickness.
Coordination with your team
We work with your contractor, engineer and inspector on shoring, fit-up windows and hold points.
No shortcuts on load paths
If the job needs engineering sign-off, partners will not weld it without one.
How it works
How a structural job moves from drawing to inspection
Four steps that keep the job legal and the steel sound.
Send drawings or photos
Submit the engineer’s drawing if you have one, or photos and dimensions if you need guidance on whether one is required.
Scope and requirements
We confirm a partner, identify permit and inspection needs, and quote the welding with shoring and access accounted for.
Fit-up and welding
The partner preps joints, preheats where needed, tacks, checks alignment, then welds in sequence to control distortion.
Inspection and close-out
Welds are checked visually and by a CWI or special inspector when required, then documented for the permit file.
Technical guide
Structural welding explained: codes, joints, processes and sign-off
This is what separates a sound structural weld from one that only looks like it, and when you need more than a welder.
When a stamped drawing, permit or inspection is required
Any change to a load path in an occupied building, which includes removing a bearing wall, adding a mezzanine, hanging equipment from roof steel or cutting into a column, needs an engineer’s stamped drawing. Commercial work almost always needs a permit, and Texas municipalities commonly require special inspection of structural welding by a certified welding inspector. Residential carports and patio covers are permitted in most cities and some require an engineered design for wind load. Partners will not weld a structural change on an occupied building without the drawing and, where required, the permit in hand.
Weld types: fillet, groove, CJP, PJP and plug
Fillet welds join members at right angles, such as a stiffener to a web, and are sized by leg length on the drawing. Groove welds join members edge to edge or flange to flange. A complete joint penetration (CJP) groove weld fuses the full thickness and is used for moment connections and column splices; it usually requires a bevel, a root opening and often a backing bar. A partial joint penetration (PJP) weld fuses part of the thickness where full strength is not needed. Plug and slot welds attach plates through a hole where a fillet cannot reach.
Processes in the field: SMAW, FCAW and GMAW
Outdoors and in wind, partners run shielded metal arc welding (stick) with low-hydrogen E7018 electrodes kept dry, or self-shielded flux-cored wire (FCAW-S), both of which tolerate the conditions that strip shielding gas off a MIG puddle. Inside a building or under a wind screen, gas metal arc welding (GMAW) or gas-shielded flux-cored offers higher deposition on long fillets. Short-circuit GMAW is avoided on thick structural joints because of lack-of-fusion risk, so spray or flux-cored transfer is used on plate over about a quarter inch.
Joint preparation and preheat
Mill scale, paint, galvanizing and rust are removed from the joint area before welding. Groove welds are beveled to the specified angle with a consistent root face. Preheat is applied with a torch or heating blankets when the section is thick, when the steel has higher carbon or alloy content, or when the ambient temperature is low. AWS D1.1 tables set minimum preheat by thickness and grade; thin A36 plate generally needs none above freezing, while heavy A572 or A992 sections and higher-carbon repair steel do. Preheat slows cooling so the heat-affected zone does not harden and crack.
Distortion control and temporary shoring
Heat shrinks steel as it cools, so a long fillet on one side of a beam will bow it. Partners control this with tack sequencing, back-stepping, alternating sides, strongbacks and, on heavy connections, pre-setting the members slightly out of square so they pull true. Before any load-bearing member is cut, the load above is carried by temporary shoring, usually screw jacks and a header or a needle beam, placed per the engineer’s shoring note, until the new steel is welded, inspected and bearing.
Residential versus commercial structural work
Residential jobs are usually a beam for a wall removal, a carport, a patio cover, a stair or a railing; they still need an engineer for anything bearing, but the inspection path is simpler. Commercial mezzanines, dock structures, canopies and equipment supports bring a permit, a special inspection agency and often a CWI at hold points. Repairs to corroded or cracked members need an engineer to assess the remaining section and specify the fix.
What partners will not do without engineering sign-off
- Cut, notch or splice a load-bearing beam or column
- Hang equipment or platforms from existing roof or floor steel
- Weld a repair over a cracked or corroded structural member
- Build a mezzanine, canopy or carport without a wind-load design where the city requires one
- Substitute weld sizes, filler or steel grades from what the drawing specifies
Related welding services
Not sure if your job needs an engineer?
Send photos and a description. We will tell you plainly whether a stamped drawing or permit is required before we quote the welding.
Service area
Where partner welders handle structural work
Structural welding is coordinated through partner welders across the major Texas metros and the regions between them. Availability is confirmed for your exact site before quoting, along with the partner’s familiarity with the local permit process.
Greater Houston
Central Texas
South and West Texas
FAQs
Structural welding questions
What owners, contractors and property managers ask before a structural job.
Do I need an engineer to remove a load-bearing wall?
Yes. The beam, its bearing points and the connections must be sized by a licensed engineer, and most cities require a permit. Partners weld to that drawing and coordinate shoring with your contractor. They will not size the beam themselves.
What does AWS D1.1 mean for my job?
AWS D1.1 is the structural welding code for steel. It defines joint designs, preheat, workmanship and inspection criteria. Partners hold their work to those practices; where a project requires qualified procedures or certified inspection, that is arranged for the project.
Who inspects structural welds?
On permitted commercial work, a special inspection agency and often a certified welding inspector check fit-up and finished welds at hold points. On residential work, the building inspector typically verifies the installation matches the stamped drawing.
Can you weld structural steel outdoors in wind?
Yes. Partners use stick with low-hydrogen E7018 or self-shielded flux-cored wire outdoors because those processes are not stripped by wind the way MIG shielding gas is. Wind screens are set up when a gas-shielded process is required.
Why is preheat needed on thick steel?
Thick sections pull heat out of the weld fast, which hardens the heat-affected zone and can crack it. Preheat slows cooling. AWS D1.1 sets minimum preheat by thickness and steel grade, and partners check both before striking an arc.
Can a cracked beam or rusted column be repaired instead of replaced?
Often, but only after an engineer assesses how much section remains and specifies the repair, usually sister plates or a replacement segment. Partners will not weld over a crack or thin rust on a load-bearing member without that assessment.
Do carports and patio covers need permits?
In most Texas cities, yes, and many require an engineered design for wind load. Partners weld the frame to the drawing and the footing detail. Check with your city before ordering steel.
What is the difference between CJP and PJP welds?
A complete joint penetration weld fuses the full thickness of the joint and is used where full member strength is needed, such as moment connections. A partial joint penetration weld fuses only part of the thickness where less strength is acceptable.
How do you prevent a beam from warping during welding?
Through sequence: tacking both sides, back-stepping, alternating sides, using strongbacks and pre-setting the member to pull true as it cools. On heavy connections the welder plans the sequence before starting.
Can you build a mezzanine in my warehouse?
Partners can fabricate and weld mezzanine columns, beams, joists, bracing and guardrails on site from an engineered design. A mezzanine is a permitted structure, so the drawing, permit and inspection are arranged before steel is cut.
Request an estimate
Send drawings or photos for a structural welding quote
Share the engineer’s drawing or photos and dimensions. We will confirm a partner, flag permit and inspection needs, and send a clear price.
- Free, no-obligation estimates
- Photos help us understand the job faster
- Same-day requests depend on partner availability