Bernard Zehrfuss, Robert Camelot, and Jean de Mailly · 1958 · Architecture
Core Mechanism
Structural necessity as the sole formal generator—where a single constraint (three-point support across extreme span) deterministically produces every subsequent geometric, material, and dimensional decision through load-path optimization.
Kernel Engagement
Seizes a specific property of the kernel’s field at its limit and makes it the generative material.
Evidence
The three-point support constraint generates cascading structural requirements the architects didn't independently choose: hyperbolic paraboloid geometry is 'the only surface that can achieve membrane action across 218 meters from three discrete supports,' and this geometry then mandates the specific thickness gradient and triangular plan symmetry.
Territory
The load resolution logic is exploited directly to produce spatial and experiential meaning—'structural necessity as the sole formal generator' where force flow generates form and 'the form generated by honest load resolution IS the architectural argument.' The practitioners chose this structural system because it generates specific meaning through structural performance.
Constitutive depth
The foundational commitment to three-point support across extreme span generates endogenous constraints—hyperbolic geometry, thickness gradient ratios, triangular symmetry—that emerge from structural necessity rather than design choice. These are consequences of the kernel's operation, not independently selected architectural vocabulary.
Legibility
The structural causation is made legible to observers: 'ruling lines visible in formwork patterns make the hyperbolic geometry readable,' the thickness gradient is 'visible at edges,' and the force flow is traceable because 'formal articulation and structural operation are identical.' The mechanism operates as foregrounded structural content.