The Welder Whose Sculptures Start as Structural Engineering
Richard Serra, whose monumental steel sculptures weigh hundreds of tons and curve through public spaces worldwide, trained not in sculpture but in steelworking. His understanding of structural loads, material fatigue, and steel behaviour under its own weight informs every decision, from initial concept through fabrication to engineering of foundations supporting permanence.
Serra's process begins with engineering drawings, not sketches. Each sculpture is modelled in three dimensions and analysed for structural integrity using finite element analysis, the same computational method designing bridges and skyscrapers. The Cor-Ten steel plates, fifty to one hundred millimetres thick, must be curved and positioned to stand under enormous self-weight.
Fabrication takes place at Pickhan Umformtechnik in Siegen, Germany, one of the few facilities with rolling mills large enough. Plates are heated to over nine hundred degrees Celsius and fed through massive rollers bending them into precise curves. Tolerances for artwork of this scale are measured in millimetres.
Welding at this scale is specialised. Plates are joined with full-penetration butt welds as strong as the parent material. Welders use submerged arc welding depositing multiple passes, and each weld is ultrasonically inspected applying the same standards used in pressure vessel fabrication.
The weathering steel develops a stable oxide layer protecting underlying metal. This process takes several years, the sculpture transitioning from mill-bright through orange to deep, even brown. The patina becomes part of the work, its colour and texture changing with light and season.
The weathering steel that Serra favours develops a stable oxide layer, or patina, that protects the underlying metal from further destructive corrosion. This process takes several years, during which the sculpture transitions from mill-bright steel through various shades of orange to a deep, even brown. The patina becomes integral to the work, its colour and texture changing with light and season. Learn more at https://www.richardserra.com
