We provide professional structural steel fabrication, steel fabrication, and structural erection for your commercial or industrial projects.
From structural steel fabrication to erection, we provide our customers with a single source for their structural steel construction projects. The South Bay’s warehouse, distribution, retail, and manufacturing sectors depend on fast, reliable structural steel contractors to hit tight construction windows. Topline works directly with our customers to complete structural projects on schedule.
We provide steel erection services for a wide range of projects in San Francisco and across the Bay Area, for both structural and non-structural applications. We routinely install fabricated steel components for:
Topline Welding provides structural steel erection and installation services throughout San Francisco, San Jose, Oakland, Fremont, Santa Clara, Sunnyvale, Hayward, and the greater Bay Area. Contact us to discuss your project location.
Yes we do! We do a variety of steel erection projects around the area, such as mezzanines, canopies, railings, and so on. Contact us to talk through the specific needs of your project.
Yes, we fabricate all of the necessary materials for your project at our Hayward shop and deliver them directly to you for installation.
We support all kinds of projects, from steel buildings, architectural structures, stairs, canopies, conveyors, modular buildings, to name a few! Contact us below to talk through your project in detail to see how we can support you best.
As soon as you can, even if you don't have drawings yet! Steel fabrication jobs often are scheduled 3-6 months out, so the sooner you can involve Topline in your project, the better.
Of course! We would love to talk through the specific needs of your project to learn how we can best bring your vision to life over multiple locations in the Bay Area.
Quality is maintained through experienced staff, in-process inspections, dimensional verification, and final review prior to delivery or installation. Our goal is to produce steel components that fit correctly and perform reliably in the field.
Turnaround time varies based on project size, complexity, and material availability. During the estimating process, we provide realistic lead times so customers can plan their schedules with confidence.
With a strong background in structural steel erection and fabrication, our team has the equipment, skill, and hands-on experience needed to complete your project with precision and reliability.
Contractors, facility managers, and business owners throughout the Bay Area trust Topline Welding for quality fabrication, welding, and installation services. Here is what customers have to say about working with our team.

December 12
Beautiful end product , prompt service, and fair price. We couldn’t be more happy with our railing!

January 17
Topline Welding came out to the peninsula to help repair one of my fabrication machines. The technician arrived on time and promptly completed the repair so I could get back to work. Thank you Topline.

April 11
I recently completed a full deck and stair replacement project with Topline Welding Services, and I couldn’t be happier with the results. The quality of the work is excellent!

May 17
From start to finish, their team was professional, clear in communication, responsive, and always on time. They installed our church’s sail shade steel posts with great skill and care, and the results look fantastic.
Ready to start your next structural steel project? Contact our team today to discuss your blueprints and get a transparent, competitive quote.