三豊金属工業 Company Profile

The more design-oriented the iron door is, the more it ignites the spirit of craftsmanship.

Since our establishment in 1963, we have been manufacturing heavy steel doors and have accumulated a wealth of know-how. For example, we have produced a variety of products including uniquely designed doors, large fire doors for installation in large factories, and infrared-resistant doors. <Manufactured Items> Steel doors: General FD, semi-air-tight FD, air-tight FD, frame doors, gate doors, inspection hatch doors, hanger doors, self-closing doors, automatic doors, lead-lined doors, lead-lined hanger doors, fire doors with pocket frames, smoke exhaust windows, FIX windows, grilles, and more.