Structural Steel & Welding Services in the Bay Area: Fabrication, Installation, and Repairs You Can Trust

When your project depends on strong, code-compliant metalwork, you need a Bay Area welding company that shows up, solves problems, and delivers clean, safe results. At Top Line Fabrication & Welding (CSLB #1133874), we specialize in structural steel, custom metal fabrication, and welding repairs for residential, commercial, and industrial clients across the Bay Area—right from our shop in Hayward, CA and out in the field with fully equipped mobile weldingunits.

What We Do Best
Structural Steel Fabrication & Installation
From design coordination to field installation, our team fabricates and sets steel beams, columns, moment frames, lintels, embeds, and base plates to meet AISC and AWS D1.1 standards. We routinely handle:

Beam reinforcement for home additions and load-bearing wall removals
Tube steel framing (HSS) for decks, canopies, mezzanines, and architectural features
Anchor installations (epoxy and mechanical) with pull-testing and inspection support
Stairs, Guardrails, and ADA Handrails
We build durable, elegant steel stairs, balcony guardrails, and ADA-compliant handrails for apartments, hospitality, retail, and custom homes. Need stainless steel for coastal durability or galvanized finishes for low maintenance? We’ve got you covered. We also coordinate with glass vendors for glass railing brackets/shoes when projects call for a mixed-material look.

Stainless, Aluminum, and Specialty Metalwork
When appearance and corrosion resistance matter, our stainless steel fabrication (e.g., platforms, counters, tanks, and skids) and aluminum solutions keep weight down without sacrificing strength. We provide TIG, MIG, and stick welding services matched to your material and environment.

Welding Repairs & Mobile Welding
Equipment break? Stair tread cracked? Handrail loose? Our mobile welding service brings certified welders and all necessary tools to your site for on-site repairs, emergency fixes, and small-scope fabrications. We repair industrial machinery, site safety rails, gates, fences, and structural connections, minimizing downtime and keeping your property safe and compliant.

Built for Bay Area Builders, PMs, and Owners
We understand Bay Area schedules and site logistics. Our team supports general contractors, property managers, HOAs, architects, and owners with:

Fast, professional quotes and clear scopes of work
Shop drawings/submittals when required
OSHA-focused safety and clean job sites
Coordination with other trades (framers, glaziers, concrete crews, inspectors)
Whether it’s a Sunnyvale beam install, a Fremont stair replacement, or Oakland guardrail repairs, we plan for access, staging, and inspections so your job stays on track.

Quality, Compliance, and Clean Work
Codes & Standards: Fabrication and field welding per AWS D1.1/D1.2 and industry best practices; structural steel per AISC guidelines.
Materials: A36, A992, HSS A500, stainless (304/316), and aluminum alloys, selected for strength, corrosion resistance, and budget.
Finishes: Hot-dip galvanizing, powder coating, shop primers, and field touch-ups to suit your environment and timeline.
Inspection-Ready: We work hand-in-hand with your engineer and inspectors to streamline approvals and punch lists.
Common Projects We Deliver
Home additions & remodels: Beam installs, posts, moment frames, stair and handrail upgrades
Commercial TI & retail: Guardrails, frames, platforms, equipment pads, bollards, and access solutions
Multi-family & hospitality: Balcony guard replacements, ADA rail systems, exit stairs, and repair programs
Industrial & manufacturing: Skids, frames, catwalks, stainless platforms, machine repairs, and safety upgrades
Why Bay Area Clients Choose Top Line
Local & responsive: We’re based in Hayward and serve Fremont, Union City, Newark, San Jose, Santa Clara, Sunnyvale, Mountain View, Palo Alto, Redwood City, San Mateo, Oakland, Berkeley, Richmond, Walnut Creek, Pleasanton, Livermore, and beyond.
Full-cycle support: Field verification, shop drawings, fabrication, delivery, and installation—or fabrication-onlyif you prefer.
Safety first: Site-specific plans, fall protection, and equipment protocols aligned with OSHA/Cal-OSHA.
Clear communication: You’ll get straightforward schedules, photos, and updates—no guesswork.
Looking for a “Welding Company Near Me” in the Bay Area?
If you need structural steel, mobile welding, or welding repairs done right the first time, our team is ready. We bring the right people, processes, and equipment to deliver clean welds, tight fits, and lasting finishes—on time and on budget.