About Bronze Age Metal Design: Custom Metal Railings, Spiral Stairs Cases, Hand rails, and Architectural Fabrication Artwork. In the past two decades, we at Bronze Age Metal Design, Inc. have been involved in hundreds of custom architectural metal rails projects in the greater Los Angeles area. We cater to architects and designers as well as developers, builders and homeowners. Our broad spectrum of metal projects spans from architectural railings, gates, and fences, through custom retail fixtures and display units, to metal furniture, sculptures and special structures. With our unique combination of engineering skills and aesthetic sensibilities, we have created a one-stop architectural metal facility, providing our clients with a complete range of services that include design, engineering, fabrication, and a wide variety of metal finishes.