Ironworkers 378 logo

Ironworkers Local 378

Chartered on September 22, 1921, Ironworkers Local 378 is a mixed labor union that currently encompasses 2,500 tradespeople. The scope of work includes, but is not limited to, structural steel, precast concrete, metal buildings, reinforcing steel, ornamental iron, fabrication, curtain walls, welding and rigging, and machinery moving. Local 378’s jurisdiction covers from west to east, Oakland to Vacaville, and from north to south, Lakeport to Crows Landing.

The Local 378 JATC offers its members a high-class 4-year apprenticeship program and ongoing journeyman training. All eligible members also receive various health benefits, annuities, scholarships, pension and retirement plans, mental health assistance, and more.

To learn more about Local 378 and its benefits programs, please visit their website at

HCM TradeSeal support for Ironworkers Local 378:

  • Auto-calculation of Ironworkers Local 378 Journeyman and/or Apprentice rates
  • Calculation and accounting support for Ironworkers Local 378 union benefits
  • Automatic union reports for Ironworkers Local 378
  • Union audit support for Ironworkers Local 378
  • Accurate Certified Payroll reporting for Ironworkers Local 378 work classes

How to Add Ironworkers Local 378 to TradeSeal

This Local's unique TradeSeal identifier is: BSOIW 378

Go to HCM TradeSeal > Data Manager and choose "Benefits, Deductions and Fringes" to add BSOIW 378 fringe benefit calculations and automatic remittance reporting.

Learn more about HCM TradeSeal by watching a brief overview video. HCM TradeSeal can automatically calculate fringe benefits and generate remittance reports for most union locals.