Service you can depend on

Structural Steel, Welding, Mobile Line Boring Repair, Heavy Equipment Repair, 24-Hour Emergency Service, Custom Part Fabrication, and Engineering, it is a services you can depend on!

Serving the Northern and Central California regions from the Greater San Francisco Bay area to the Sierra Nevadas.

From engineering to installation

Our Services

From Structural Steel, Welding, Mobile Line Boring, Heavy Equipment Repair, and 24-hour Emergency Repair Services to Engineering and Custom Fabrication, we provide a comprehensive range of services across a broad spectrum of industries. Do not see the service you need? Our list is always growing! Call us and find out how we can help!

  • Structural Steel 
  • Engineering Design
  • Custom Part Fabrication
  • MIG, Stick, & TIG Welding
  • CNC Plasma Cutting
  • CNC Machining
  • CNC Shearing & Press Braking
  • 24-Hour Emergency Repair
  • Heavy Equipment Repair
  • Heavy Equipment Assembly
  • Mobile Line Boring
  • Heavy Equipment Installation
  • Agriculture Equipment Repair
  • Agriculture Equipment Installation


You can depend on our fleet of mobile services trucks and expert technicians to get your operations up and running.

Whether its industrial, agricultural, or on-site heavy equipment repair or installation, line boring, or welding our fleet of mobile service trucks and skilled technicians give us the range and expertise to deliver the services you need whenever and wherever you need them most.

Custom Part Fabrication

We engineer the highest quality products. If you are looking to improve your process by enhancing your equipment, then we will be able to assist you. We offer Machining, CNC Shearing, Press Braking, and CNC Plasma Cutting. Our team of engineers and expert technicians will utilize their skills to produce your drawing into a high quality part with precision requirements.

Expert repairs when you need them

24-Hour Emergency On-Site Repair

A fully equipped 24-hour mobile solution for emergency repairs.

Our companies

Over a hundred years of combined expertise in California.

Yosemite Welding & MFG began with welding and custom manufacturing and fabrication services to customers throughout Northern California in 2013 with a 5,000 square foot building. Today, Yosemite Welding & MFG Incoperates out of several buildings and continues to grow!

Since opening in 1917, Stanley Adams Machine Company has continuously served the agricultural and industrial industries of the San Joaquin Valley by providing machining services, including repair, prototype fabrication, and new part manufacturing.

In 2021, STF Iron Inc joined the Yosemite Welding Family adding services, such as Structural Steel, Engineering, Fabrication, and Expert Erection.

Contact Us


647 Galaxy Way
Modesto, CA 95356
Phone: (209) 874-6140

Hours: Monday-Friday 8:00am – 5:00pm