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MSI, Inc. is a full full-service structural steel fabricator and metal distributor for multiple industries including commercial projects. We offer full support to ensure we deliver to your project site the highest quality product, experienced team and dependability. We promote a team atmosphere where everyone is committed to providing a personal contribution to the success of our team, company and clients.

Our wide-ranging experience as structural steel fabricator and steel supplier include but not limited to:

  • Structural steel framing
  • Stainless steel fabrication
  • Stairs and ship ladders
  • Handrails
  • fabrication
  • Trash enclosures
  • Embeds
  • Fencing/gates
  • Equipment screens
  • Steel canopy

Safety is our number one priority, we are proud to put into practice safety standards that go above and beyond the standards set forth by OSHA. As a result, we have the lowest OSHA reporting rates in the history of the company.

MSI, Inc. is your turnkey solution for structural steel fabrication, our expertise and hands-on experience means we can provide your project with highly efficient and economical turnkey services. Properly designed, installed on time, providing you a single point of contact throughout the project is our goal. As your partner from beginning to end our best-in-class customer service while performing quality work means we are committed to the success of your project.


Our turnkey service in high-end residential construction projects means partnering with MSI, Inc., an AISC, LA City and AWS D1.1 certified team of professionals, we are your partner from beginning to end, performing quality work and committed to the success of your project. Providing all your structural steel fabrication and misc. metals our capabilities include state-of-the-art processing equipment, 75,000 sq.ft. warehouse facility, dependable, experienced field crew, and 24/day emergency service.

We see every client of every size as a potential long-term trading partner, and we want to do our best to make that partnership successful. MSI, Inc. has the highest level of commitment to:

  • Accountability
  • Safety in the Working Environment
  • Optimal use of resources
  • Maximum productivity
  • Competitive Operational costs

MSI, Inc.’s wide ranging experience includes but not limited to:

  • Structural steel framing
  • Stainless steel fabrication
  • Pipe supports
  • Conveyors skid weldments
  • Hoppers
  • Pipe fabrication and spooling
  • Catwalk fabrication
  • Stairs and ladders
  • Service platforms
  • Rebar cages
  • Anything else your next project demands


For over 55 years MSI, Inc. continues to supply the industrial industry with structural steel fabrication and misc. metals. Our experience in working with refineries, and manufacturing clients can be your piece of mind that your project will operate smoothly. Our best-in-class customer service includes a 24 hour emergency service for your turn-around schedule, and any immediate need.

Not all steel suppliers & structural steel fabricators are alike. MSI, Inc. maintains several certifications including AISC, LA City, and AWS D1.1. This means our procedures and standards ensure the best quality work by experienced professionals. Additionally, as your one stop shop we include detailing of shop drawings, on-time delivery, and in house state-of-the-art processing equipment 24 hours a day.

Our welding machines include a wide range of equipment: GMAW, FCAW, SMAW 5-15 welding line equipment, including a Dry Rod electrode stabilizing oven. With 9 cranes with capacities to tons, and forklifts with capacities between 2 and 5 tons, we have all the tools necessary to move, process, and deliver steel products on time throughout Southern California.

  • CNC Plate processor Voortman V304 plasma and oxy-fuel cutting
  • FICEP Beam line – a fully automated CNC in-line unit for sawing
  • Marvel 18 – a fully automated CNC in-line unit for sawing, drilling, and coping
  • Marvel 18 – a fully automatic horizontal band saw
  • Doall horizontal bandsaw – also fully automatic
  • Armada plate shearer
  • Plasma cutter
  • Marvel 20-inch capacity vertical bandsaw
  • Cincinnati 230T hydraulic press brake
  • Scotchman 120 ton ironworker

Our 75,00 sq.ft. warehouse in Los Angeles is ready with the type, form, and quantity of steel or aluminum you need.

  • Structural steel
    • Angles, structural zees, structural tees, and other shapes
  • Hot rolled or cold finished bar stock
  • Flat rolled plate
  • Flat rolled sheet
  • Steel tubing
    • Round seamless, round welded, square, rectangular, and more
  • Stainless steel
    • Sheets, plates, bar angles, tubing and pipe
  • Aluminum
    • Round, hex, square, angle, sheet, plate, perforated, floor grating, etc
  • Exotic alloys
    • Plates, bars, tube & sheet


Capable to handle the processing you need.

  • Double-disk grinding
  • Bending
  • Circle or ring sawing
  • Chamfering
  • Edge trimming and conditioning
  • Fabrication
  • Cutting to length
  • Pipe threading precision plate sawing and blanking
  • Tee splitting
  • Trepanning, to name a few


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“I have worked with MSI on a number of projects. One in particular, when we did the initial start-up of CT-2 (combustion turbine), the turbine for lack of a better term “puffed” and sent a great deal of pressure up against our diffuser plate, catalyst bed and lifted plating on the duct flooring. After inspecting the damag,e the list of materials was quite substantial and of course all of this took place on a saturday. I contacted metal supply and supplied them with a list of materials as well as certain designs that needed to be fabricated. They had their manager meet me at the shop, they had all of the materials we needed, everything we asked for he was able to fabricate for us(sheet metal, flatbar bent and or cut to certain specs). I also placed a call the next day being Sunday and was met with the same professional attitude and I was very pleased with the service and products. thank you metal supply for all the assistance!”

~Daniel Waters


“This letter is inform you that MSI has been working on a major project at the Chevron refinery in El Segundo. The level of commitment, professionalism and communication set forth by MSI aided in the overall success of this project.

All delivery dates have been met, actually some have been improved. All shop drawings have been on time or early, and most importantly the level of communication brought forth by the MSI project management team has been exceptional.

I will highly recommend MSI for any job. and look forward to working with this company in the future.”

~Fred Mohtashemi, Project Manager

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“First, I would like to thank Ray Castro and his fabrication team for coordinating the fabrication of Expansion Joint for the Air Preheater Replacement project.
The team has done a GREAT JOB!
Normal fabrication would have taken 2 to 3 weeks to get it out of the shop, but in this case, the complete order was fabricated and delivered in matter of 48 hours.
Definitely your company has surprised a few folks here at Phillips 66 of your capability supporting difficulty.”

~Lee Spalding Sr. F.E., Brinderson Constructors

Mustang Engineer

“Mustang Engineers and Constructors, L.P. served as the engineering, procurement and construction management contractor for the Flare Gas Recovery projects at Chevron’s El Segundo Refinery. I wanted to take this opportunity to thank MSI, Inc. for the outstanding work you did for us on these projects. As a result of your efforts one of these projects was awarded the Western Council of Construction Consumers (WCCC) Distinguished Project Award for 2009.

MSI fabricated over 800 tons of steel for these projects with near zero fabricator errors. Our construction management team told me on several occasions this was the best steel design and fabrication effort they had ever worked on. Coming from a team that has an average of over 30 years experience in the business, this is the ultimate compliment in my mind. All this was accomplished with some very aggressive schedule requirements; you were able to meet all our delivery needs.

Mustang looks forward to working with you again in the near future.”

~Tommy T. Bennett, Project Manager


“We worked directly with you on the last minute, hot rush fabrication orders. MSI’s communication and support throughout the project exceeded our expectations. Specifically, your availability all hours of the day, and the sense of urgency on our orders was appreciated. MSI met all promises on deliveries, professionalism was unrivaled and quality was never an issue.”

~Bruce Lamb