Building Pathology

Post-Wildfire Pathology and Stewardship Strategies for Mid-Century Modern Landmarks

Summary of Problems:
The evaluation identifies three primary drivers of wildfire vulnerability for mid-century modern residences in the Los Angeles region:

1. Environmental Volatility: Increasing “hydroclimate volatility” is extending fire seasons and creating highly flammable landscapes.

2. Site-Specific Risk Factors: Steep slopes accelerate uphill fire spread, while surrounding “fuel” like dense vegetation heightens ignition risk.

3. Mechanisms of Ignition: While steel frames are non-combustible, wind-borne embers remain the greatest threat, penetrating building envelopes from miles away.

Conclusion:
As wildfire frequency and burned areas increase, traditional preservation must transition to a resilient, time-dependent management system. By integrating fire-adaptive strategies, such as establishing defensible space and retrofitting with tempered glass and ember-resistant vents, stewards can mitigate material damage and long-term climate impacts.

Clerestory Failure Analysis: Building Pathology of a Modernist Museum

Summary of Problems:
The investigation identifies three primary pathologies contributing to the cracking of the 8mm annealed float glass at the Fine Arts Museum:

1. Weakened Glazing: The glass is inherently prone to microcracks, a condition worsened by sandblasting which can reduce structural strength by approximately 33%.

2. Corrosion (Rust Jacking): Flat window sills allow water to pool, causing the steel frames to oxidize. This corrosion expands the metal’s volume up to tenfold, exerting compressive pressure on the glass.

3.Foundation Movement: Soil variations (seasonal swelling in clayey soil); dissimilar footings (strip and pyramidal); structural stress

Conclusion:
The glass failure is likely caused by environmental & structural stresses acting upon a weakened material substrate. While corrosion & differential settlement are highly credible hypotheses, they require verification to justify the allocation of repair funds.